JPS5929091Y2 - rail clamp - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rail clamp that is attached to a foundation rail to support the reaction force of the force required for moving a heavy object such as a building laterally.

When moving a building, etc., excavate a portion of the ground below the building, lay multiple rows of railway rails, place rollers between the top of the rails and the building, and then dig out the remaining part of the ground. The building is then supported on the rails via rollers, and then the building is moved using an appropriate fixed point or a rail clamp fixed to the rail as a fulcrum using a pushing mechanism such as an oil jack or a pulling mechanism.In this case, Conventionally used rail clamp buoys are made up of a pair of left and right blocks sandwiching the rail head opening and are fixed to the rail via tightening bolts, as shown by reference numeral A in Figure 3. The supporting force mainly utilizes the effect that the clamp itself inclines rearward so that its front and rear corner edges can grip the upper and lower surfaces of the rail head opening.

By the way, it is generally believed that the supporting force is about 10% of the weight of the building itself, so the above fixing method is unstable, and the clamp itself tilts after being tightened, and the pushing force is not enough to stabilize it. There is some play, making it inefficient to move the clamp as the building is moved, and there is no tightening action, so the rail clamp may come off when moving the building.
It has the disadvantage of a tendency to regress.

In contrast, the present invention increases the pressing area of the clamp itself against the rail, and also applies strong pressure to the rail head from above and below via a hydraulic mechanism.

An embodiment of the rail clamp of the present invention is shown in FIGS. 1 and 2. In these figures, 1 is a cylinder member, which has a thread on the inner surface of its upper end and connects to the hydraulic hose connection port 2. The lower half of the standpipe 3 is extended in the front and back direction,
It is formed into a prismatic engaging part 5 with a screw hole 4, and
A pair of pistons 7 are inserted into the standpipe 3 from below, the lower half of which has a prismatic shape that extends forward and backward, and has a toothed plate 6 fixed to its lower surface via a countersunk head screw.

Next, reference numerals 8 and 8 denote left and right side plates, which are made in the shape of a rectangular thick plate, and each has an upper groove 9 and a prismatic tooth plate on the inner surface to engage both side edges of the retaining portion 5 of the cylinder member 1. A lower groove 11 into which the screw 10 is to be fitted is formed, and the lower edge of the lower groove 11 protrudes slightly to form an engaging jaw 12.

These left and right side plates 8, 8 have an upper groove 9 position and an engaging jaw 1.
2.Through holes 13 and 13.1 for bolt insertion at the upper surface positions, respectively.
4.14 is passed through, and the upper pole (15, 15) and the lower pole (16, 16) are inserted through it.

The present invention has the above configuration, and includes:
As shown in Fig. 1, the left and right side plates 8, 8 are attached via bolts 15 while sandwiching the cylinder member 1, and the engaging jaws 12,
The tooth plates 10 are respectively placed on the rails 12 and positioned on the lower surface of the rail head of the rail, and the bolts 15 are rotated and tightened to fix the entire device on the rail.

The cylinder member 1 may be cast integrally with one side plate 8, and by doing so, the work of attaching it to the rail can be made more efficient.

Next, the hydraulic hose is screwed onto the hydraulic hose connection port 2, and by supplying pressure oil into the standpipe 3 from a separately provided pressure oil supply mechanism and compressing the piston 7, the tooth plate 6 is applied to the upper surface of the rail head. The entire device can be firmly fixed to the rail by pressing down on the lower surface of the rail head with the tooth plate 10 by the reaction force.

In this way, the hydraulic jack placed between the building and the rail clamp is activated to move the building, and then the building is moved.15.1
6 and slide it on the rail to continue working one by one.

In the embodiment shown in FIGS. 1 and 2, oil is supplied to the standpipe 3 through the hydraulic hose connection port 2 to operate the piston 7, but a hydraulic jack (not shown) is used. It is also possible to actuate the piston 7 by applying the piston to 2 and connecting it directly to the piston 7 by mechanical means, for example by screwing.

As described above, in this invention, the rail head is clamped by square bar-shaped pressure contact surfaces that extend from above and below in the front and back direction along the rail, and is strongly pressed by the tooth plates 6 and 10, so that the clamp itself does not wobble. There are many advantages, such as the ability to stably perform the pushing operation using the hydraulic jack, and the bolts 15 do not have to be tightened very strongly, making it easy to loosen the bolts when moving the clamp itself. be.

[Brief explanation of the drawing]

FIG. 1 is a sectional front view showing an example of the rail clamp of the present invention, FIG. 2 is an exploded perspective view showing each part thereof, and FIG. 3 is a diagram showing a conventional rail clamp. In the figure, 1 is a cylinder member, 2 is a hydraulic hose connection port,
3 is a standpipe, 5 is an engaging portion, 6 and 10 are tooth plates, 7 is a piston, 8 is a left and right side plate, 12 is a retaining jaw, and 15 and 16 are bolts.

Claims (1)

[Claims for Utility Model Registration] 11 A piston 7 having a toothed plate 6 fixed to the lower surface of a prismatic member projecting forward and backward to be pressed against the upper surface of the rail head, a vertical pipe 3 into which the piston fits, and a square column at its lower part. A cylinder member 1 having a columnar retaining portion 5, a pair of tooth plates 10゜10 for holding the top of the rail from its lower surface, and a pair of tooth plates 10 having downwardly engaging jaws 12 to engage and support the tooth plates. A rail clamp characterized by comprising side plates 8, 8, bolts 15 for joining the side plates and the cylinder member from the outer surfaces of the side plates, and bolts 16 for press-contacting the engaging jaws 12 to the side surfaces of the rail. 2. The rail clamp according to claim 1, wherein the cylinder member 1 is integrally formed with one of the side plates 8.