JPS6046315B2 - How to install and fix the sole plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the method of installing and fixing sol plates used for installing and supporting heavy machinery on concrete foundations.

In general, rotating machines, especially large-capacity, high-speed rotating machines that have large static and dynamic loads, are required to keep the machine level and ensure quiet and smooth operation. Ensure that the target load is applied to the base axis 1J-, soil L-F,, 1
1 - Hit the width mountain -reπn#re' piece 4E/ Installed and fixed on top of the installed sol plate.In order to make it easier to understand the present invention, first the relationship between the machine and the sol plate will be explained. I will briefly explain.

In Fig. 1, subsol plate or Rampack grout 4 is placed on a concrete foundation (not shown) with a large mass prepared to ensure stable operation of the machine, and its levelness is adjusted individually. . After placing the sol plate 5 on top of this and adjusting the level with high precision,
Tighten and secure with anchor bolts (not shown). It goes without saying that the lower part of the anchor bolt is usually firmly embedded and fixed in the concrete foundation in advance. A machine 1 fixed on a machine stand 2 is placed on a sol plate 5 and fixed to the sol plate 5 with mounting bolts 3. In this way, the dynamic load on the machine 1, for example due to vibration, is
It is transmitted to the sol plate 5 through the mounting bolt 3, and is further transmitted to the large concrete slab foundation by the anchor bolt fixing the sol plate 5 and absorbed. FIG. 2 shows the details of these relationships.

It can be seen that the anchor bolts 6 buried in the concrete foundation C firmly tighten the sole plate 5 supported by the sub-sole plate 4, and that the machine base 2 is fixed to this by the mounting bolts 3. At first glance, this appears to be a complete and complete machine installation method. However, the exact positions of the tightening bolts 3 and anchor bolts 6 cannot be determined in advance due to installation accuracy.
The bolt holes in the sole plate 5 and the machine base 2 are blind holes as shown in Figure 2 to allow for some adjustment during installation on site, so if excessive horizontal force occurs during an earthquake, etc. It is possible to move horizontally by the margin of the blank hole, but it is possible that it will deviate from the original, strictly adjusted and correct position. In order to prevent this, a knock pin or knock bolt 7 is driven between the machine base 2 and the sole plate 5 after installation on site to fix their mutual positional relationship and restrain horizontal displacement. However, the sole plate 5 is only tightened with an anchor bolt 6, and since the bottom thereof is a concrete foundation C, it is not possible to drive something such as a dowel pin 7 into it. After setting the sole plate 5, mortar M is placed around it.
Generally, the mortar M is strong against compressive force, but extremely weak against shearing and tensile forces, so the surrounding mortar cannot be expected to prevent the sole plate 5 from moving in the horizontal direction. Of course, the frictional force on the bottom surface of the sole plate 5 is quite large due to the tightening force of the anchor bolt 6 and the static load of the machine 1! Therefore, normal operating force of the machine 1 or an earthquake will not cause horizontal displacement in practice. However, it cannot withstand excessive horizontal force that suddenly occurs due to a huge earthquake, thermal expansion of the machine, or an accident involving the machine or the system that contains it. Therefore, when it is expected that an excessive horizontal force like the one shown in Figure 3 will occur, the method shown in Figure 3 has been implemented. That is, the embedded hardware 8 is embedded in the concrete foundation (as shown in the figure) in advance,
Since it is firmly fixed, the sole plate 5 is finally adjusted for strict horizontality and fixed with anchors 4 and bolts 6.
The horizontal force is absorbed by the embedded metal fitting 8 and it does not move. Of course, since the hardware 8 is constructed at the same time as the concrete foundation work before the setting of the sole plate 5, the positional relationship with the sole plate 5, which will be set after that, cannot be set strictly. It is necessary to insert an adjustment liner 9 between the sole plate 5 and the sole plate 5. The disadvantages of this case are that, as mentioned above, the position of the embedded metal fitting 8 cannot be precisely set in advance, so an adjustment liner 9 is required, and movement can only be restricted in one direction (in Fig. 3, the longitudinal direction of the sole plate 5 is Direction = below Y
Only the = direction can be constrained, and deviations may occur in the = width direction and the X direction. ) No matter how precisely the position of the embedded hardware 8 cannot be determined, if it is too misaligned, it will be difficult to process and adjust the adjustment liner 9 on site, so it must be set with great care. , the adjustment liner 9 is still essential,
This requires careful processing and adjustment on site due to the gap between the sole plate 5 and the embedded hardware 8, which requires a large number of man-hours. To prevent displacement in the X direction, it is sufficient to install embedded hardware 8 around the entire circumference of the sole plate 5 (minimum 6 locations in total) in the same manner as shown in Figure 3, but this is not possible due to the above drawbacks. It costs a lot of time and money.

In addition, although only the left side is shown in FIG. 3 and the right side is omitted, it is natural that the same device is installed symmetrically on the right side as well, so that the sole plate 5 is sandwiched from both left and right ends. It is something. Therefore, the method shown in FIG. 4 can be considered as a method that eliminates the above drawbacks.

Although FIG. 4 is limited to the anchor bolt type using the vibrator sleeve 11, first, the anchor bolt 6 housed in the vibrator sleeve 11 is embedded in advance at the same time as the concrete foundation work. Then anchor block 1
2 (a perspective view is shown in FIG. 5) is passed through the upper end of the vibrator sleeve 11, and the hole C and the portion A around the upper end of the vibrator sleeve 11 are welded and fixed. After that, the sole plate 5 is strictly horizontally adjusted, the anchor bolt 6 is tightened, and the knock pin 7 is driven in to fix the sole plate 5 and the anchor block 12. In this way, the horizontal force is transmitted to the anchor block 12 through the dowel pin 7, further transmitted to the vibe sleeve 11, and absorbed by the concrete foundation C. X. ．． Horizontal force can be restrained in either Y direction. However, the method shown in FIG. 4 also has a major drawback.

First, the lower surface of the sole plate 5 and the contact surface of the anchor plate 12 must be in close contact with each other. because,
If these two sides are not in close contact, the dowel pin 7 will not receive any shearing force and will be subject to bending force.
The dowel pin 7 must have a large diameter. Therefore, if it is expected to receive horizontal force due to the shear force of the dowel pin 7, both sides must be in close contact with each other, but the anchor block 12 must be attached to the vibe sleeve 11 before the sole plate 5 is attached. (After the sole plate 5 is placed, the bottom A part cannot be welded.) Therefore, it is very difficult to make the two sides come into close contact with each other. In case, anchor block 12
If the dowel pin 7 is set too high, the sole plate 5 will come into contact with it, making it impossible to adjust the levelness, and if the dowel pin 7 is set too low or tilted, the effectiveness of the dowel pin 7 will be reduced. In addition, in general, the vibe sleeve 11 is not expected to have mechanical or structural strength, but is intended to absorb errors in construction of the anchor bolt 6, so a thin-walled vibe may be used. Therefore, if you expect it to perform the role shown in Figure 4, it must be specially made. This is because if the wall thickness is not thick, it will not be possible to weld the part A, and it will not be able to receive the horizontal force of the sole plate 5 transmitted from the anchor block 12.
Normally, when the adjustment and installation of the sole plate 5 is completed, mortar M is filled not only around the sole plate 5 but also inside the vibe sleeve 11, but since this work is done in a narrow space, it is necessary to completely fill the vibe sleeve 11 with mortar M. In reality, it cannot be guaranteed that the mortar M will be filled inside. In particular, if there is an anchor block 12 as shown in FIG. 4, this will cause problems and the filling of the mortar M will become even more uncertain. In other words, the method shown in Fig. 4 lacks reliability in ensuring that the horizontal force applied to the sole plate 5 is transmitted to the concrete foundation C and preventing the sole plate 5 from moving in the horizontal direction. If you try hard, your work efficiency will be impaired. An object of the present invention is to provide a simple and economical sole plate that eliminates the above-mentioned drawbacks, shortens the time required for on-site installation work, and at the same time more firmly and reliably restrains and fixes the horizontal movement of the sole plate. The purpose of this invention is to provide a method for installing and fixing.

Hereinafter, the method according to the present invention will be described as shown in FIG. 6A. ．． This will be explained with reference to an embodiment shown in FIG.

Figure 6A, . In b, first, the sole plate 5 has both sides along the longitudinal direction (only one side is shown in the figure, but the same applies to the other sides as well).

) Each edge is cut out in the shape of an arrowhead to form a slope 2. This slope 2 has a constant notch angle in order to facilitate subsequent work, and in this embodiment, it is about 45 degrees. On the other hand, the post key 13 that is in contact with the sole plate 5 is attached to the concrete foundation C.
Using the dimension from the top surface to the top surface of the sole plate 5 as a guide, prepare a piece slightly smaller than that, and form in advance a band portion of a size suitable for the slope 2. On the other hand, the embedded metal fittings 8 are buried at the same time as the concrete foundation work, as in the case of Fig. 3, but since the embedded metal fittings 8 are not in direct contact with the end surface of the sole plate 5, as shown in Fig. 6b. Embed so that the surface is exposed on the chipping surface of concrete foundation C.

The sole plate 5 is leveled in the usual manner and tightened with anchor bolts (not shown), as in the past. After that, stand the post key 13 on the embedded metal fitting 8, and insert the sole plate 5 into the ramming part of the post key 13.
The post key 13 and the embedded hardware 8 are welded and fixed at the E part while bringing the slopes 2 and 2 of the post key into close contact with each other. As a means of bringing the slope 2 of the sole plate 5 into close contact with the ramming part of the post key 13, both members may be attached by spot welding or may be applied with adhesive. There is no problem even if someone presses it down with their hands. Although the sole plate 5 is rarely removed once the machine is installed, it is not always possible to remove it, so it is not preferable to permanently fix the sole plate 5 and the post key 13. In that sense, welding should be avoided even if it is temporary, and adhesives such as instant adhesives, although these days some are stronger than the base metal, should be used. Probably. Instant adhesive has good workability and is strong against tensile force but weak against shearing force, so it can be easily removed at a later date. Furthermore, unlike the one shown in FIG. 3, the embedded hardware 8 is not strictly regulated in terms of its positional relationship with the sole plate 5, parallelism, horizontality, etc. during concrete foundation work, and therefore plays a role in the present invention. Since this simply fixes the post key 13, there is no need to be very careful when burying the post key. In the same way, the embedded hardware 8 can be processed and manufactured by simply cutting an iron plate with gas, and the embedded hardware 8 shown in FIG. It is extremely simple compared to not using the embedded metal fitting 8, and there is almost no disadvantage to using the embedded metal fitting 8. As described above, although the embedded metal fittings 8 in FIGS. 3 and 6 have extremely similar appearances, there is a significant difference in workability and processing man-hours due to their distant roles. Although it is clear from the figure, if we add a further explanation, for example, in terms of processing man-hours, in the case of Figure 3, the end face of the embedded metal fitting 8 has good straightness and precision because it is in direct contact with the sole plate 5 through the adjustment liner 9. However, with the embedded metal fitting 8 according to the present invention, there is no need to process the end face at all, and since the post key 13 is simply welded to the surface, it is explained above that almost no processing is required. It is as follows. In addition, in FIG. 3, the adjustment liner 9 requires precise machining and adjustment on site, and the gap between the sole plate 5 and the embedded hardware 8 must be filled without any gaps, but in the method of the present invention shown in FIG. Only the two surfaces where the sole plate 13 and the sole plate 5 are in contact, that is, the slope 2 to the strut portion, need to be machined in a factory to ensure good flatness, and this is an extremely easy task.

Po. The height of the strike key 13 only needs to be set so as not to be higher than the sole plate 5, and the degree of dimensional freedom is extremely large, so there is almost no need for on-site processing. Therefore, here as well, the installation of the embedded metal fitting 8 in FIG. Anchor block 1 shown in Figure 4 may require precision in mounting height.
In contrast to No. 2, where it is essential to adjust the height and horizontality of the mouth surface,
It will be understood that the present invention provides extremely good workability.

FIG. 6c is a partially enlarged sectional view of an embodiment of the present invention.

All the symbols used in the same figure are shown in Figure 6A. ．． Since it is the same as that in FIG. b and FIG. 3, the explanation will be omitted. In the embodiments described above, the post key 13 is a square column, but it does not necessarily have to be a square column, and may be a round bar, for example, as shown in FIG. 7a. In this embodiment, machining of the slope 2 of the sole plate 5 is simpler than in the embodiment of FIG. 6, since flatness is not required. In addition, Fig. 7b shows a case where the post key 13 cannot be provided at the corner part of the sole plate 5 due to the installation space, and the post key 13 is moved to the center part 1 of the sole plate 5 to reduce the installation space. It is.

That is, in this embodiment, a pair of slopes 2 are formed by cutting out substantially the center of both sides of the sole plate 5 in a herringbone shape, as shown in FIG. 6A. , b can function similarly to the embodiment shown in FIG. Moreover, in this embodiment, only one post key 13 and one embedded metal fitting 8 are required for each side, which is very economical. As described above, the present invention does not use the dowel pin 7 as shown in FIG. 4 at all, so there is no need for work such as precision reaming of the hole for driving the dowel pin during on-site installation work.
In addition, there is no need to process the embedded metal fittings 8 as shown in Fig. 3, to perform precise position adjustment work, or to finish the alignment of the adjustment liner 9, which greatly increases the degree of freedom in installation and adjustment.
Therefore, work efficiency is improved, and the number of on-site processing, installation, and adjustment man-hours, as well as the number of factory processing tools, can be significantly reduced, and the horizontal movement of the sole plate 5 in both the X and Y directions is restrained more reliably than the conventional method.・Fixing can be achieved extremely easily.

[Brief explanation of the drawing]

Fig. 1 is a conceptual diagram showing the relationship between the installed equipment and the sole plate, Fig. 2 is a detailed view of the sole plate fixing part of the conventional example, and Fig. 3 is a conceptual diagram showing the relationship between the installed equipment and the sole plate. ．． 4A and 4B are views showing conventional sole plate horizontal movement prevention measures, FIG. 5 is a perspective view showing the anchor block used in FIG. 4, and FIGS. 6A, . b
l and c are a plan view and a side view showing one embodiment of the present invention;
7A and 7B are plan views showing other embodiments of the present invention. C... Concrete foundation, 5... Sole plate,
8... Embedded hardware, 13... Post key, 2... Slope, To... Thrust part.

Claims (1)

[Claims] 1. Each edge of each side of the sole plate along the longitudinal direction is cut out in the shape of an arrowhead, or approximately the center of each side of the sole plate across the longitudinal direction is cut out in the shape of an arrowhead to provide a slope, while the post key has a slope of the sole plate. At least in the vertical direction, a strut portion is formed with a size commensurate with that,
The method for installing and fixing a sole plate is characterized in that the post key is integrally fixed to an embedded metal fitting embedded in a concrete foundation while bringing the strap portions of the post key into close contact with each of the slopes.