JP2000053400A - Clamp device in large heavy cargo horizontal pulling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve work efficiency by equalizing a curvature radius of a rail longitudinal side surface of a stopper pin to a rail-longitudinal curvature radius of a stopper hole. SOLUTION: A stopper hole 22 of a rail is an ellipse that is long longitudinally to rail. A stopper pin 11 is formed by chamfering in parallel rail- orthogonal surfaces facing each other of a cylindrical pin, its rail-longitudinal side surfaces are remained cylindrical surfaces, its curvature radius is equal to a rail-longitudinal curvature radius of the stopper hole 22, and rail-orthogonal side surfaces have a size absorbing straight line tolerance of the rail, and are narrower than the width of the ellipse of the stopper hole 22. Therefore, during horizontal pulling, application of a hydraulic jack presses one end of the stopper hole 22 onto the stopper pin 11, but contact of the both on the entire large cylindrical surface mitigates stress not to generate deformation or damage. Since orthogonal surfaces are narrower than the width of the stopper hole 22, falling-in and drawing-out of the stopper pin 11 are facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for horizontally pulling a large heavy object, in which a large heavy object is moved in a horizontal direction, transferred to a special trailer or the like, and carried out or carried in.
The present invention relates to a clamp device that holds a reaction force of a lateral pull.

[0002]

2. Description of the Related Art For repairing a large heavy object such as a blast furnace furnace installed on a foundation, for example, it is moved in a horizontal direction and carried out, and the repaired furnace is carried in and installed on the foundation again. For such operations, a large heavy load horizontal pulling method is adopted. The outline of this method will be described with reference to the drawings.

[0003] As shown in FIG. 8 (a), a large heavy object S is installed on a foundation B constructed several meters above the ground. As the large heavy object S, for example, the diameter is approximately
There are 17-meter, 10-meter-high and approximately 1,500 tonnes of iron furnaces. First, as a preparatory work, the large heavy object S is lifted from the foundation B by a method such as jacking up, the rail 2a is installed on the upper surface of the base B, and the cart 4 is inserted on the upper surface to place the large heavy object S thereon. I do. Next, a temporary receiving frame F is installed at a position where the large heavy object S is to be pulled out, that is, in the space on the right side in FIG. This state is shown in FIG. Rails 2a and 2b are large heavy goods S
Depending on the size and weight of a plurality, they are installed in parallel.

Then, the carriage 4 is laterally pulled by a horizontal pulling means such as a hydraulic jack as shown by an arrow in FIG.
(C) As shown in FIG.
Move it up. At this position, the large heavy object S may be repaired, or the weight carrier D having the jack function may be inserted into the temporary receiving frame F, and the temporary receiving frame F and the entire large heavy object S may be lifted by the jack function. May be carried out to a predetermined location such as a repair shop.

[0005] After the renovation, or the work of loading a large-sized heavy object S as a substitute and returning it to the foundation B again, the procedure may be completely reversed. FIG. 9 is a partial side view showing a main part for performing horizontal pulling.
Is a hydraulic jack, and 41 is a slide bearing attached to the lower surface of the truck C. For example, a plate having a low friction coefficient such as fluororesin is used. On the other hand, reference numeral 21 denotes a slide plate stretched on the surface of the rail 2, preferably a brushed stainless steel strip.

When the clamping device 1 is fixed at a predetermined position on the rail 2 and the hydraulic jack 3 is operated, the bogie 4 moves in the horizontal direction. After a predetermined distance, that is, one stroke, the fixing of the clamp device 1 is released, and the hydraulic jack 3
Is operated in the reverse direction, the heavy truck 4 becomes a reaction force point, and the clamp device 1 moves to the next position. By repeating this procedure, a large heavy object is laterally drawn.

Here, various mechanisms are known for fixing the clamp device 1 at a predetermined position on the rail 2, and there are two main types, a mechanism using friction wedges and a mechanism using pins. FIG. 10 is a sectional view of an essential part showing an example of a friction wedge, in which 51 is a rail, 52 is a friction wedge divided into two, and 53 is a tapered disk. Two friction wedges 52a and 52b are inserted into predetermined positions of a rail 51 installed in parallel with the rail. Split friction wedge 52a
, 52b are machined into a tooth shape, and the outer surface is tapered. In addition, the two split wedges 52a, 52
Put taper disk 53 on the outside of b. The inner surface of the tapered disk 53 is tapered so as to match the outside of the two friction wedges 52a and 52b. Therefore, when the taper disk 53 is pushed in the rail direction, the two friction wedges 52a, 52b are firmly engaged with the rail 51 by the wedge effect of the two friction wedges 52a, 52b and the taper disk 53. . When the hydraulic jack is actuated as shown by the arrow in FIG.
Since it engages with 51 to maintain the reaction force, it is possible to move a heavy object. However, in this method, if the friction wedge is not firmly fitted, the engagement will slip due to the jack force, there is a large danger, and the friction wedge must be assembled on the opposite side depending on the moving direction of the heavy object. Is troublesome.

FIG. 11 is a partial cross-sectional view showing an example using a pin, and a stopper hole 22 provided in the rail 2 at a predetermined pitch.
5 shows a state where the stopper pin 54 has been dropped from the main body of the clamp device 1. When the clamp device 1 is moved along the rail 2 and fixed at a predetermined position, the diameter of the stopper hole 22 is slightly larger than the outer diameter of the stopper pin 54 so that the stopper pin 54 can easily enter the stopper hole 22. When the jack acts, the stopper pin 54 is pressed against one end of the stopper hole 22 as shown in FIG. 11, so that the stopper pin 54 and the stopper hole 22 are connected at one point. There is a problem that since the contact is made (in a straight line in three dimensions), the stress becomes extremely large, and deformation occurs and maintenance is required.

[0009]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the conventional clamping device, is of a pin type which can be easily operated, does not have an excessively large contact load, and drops into a stopper hole. An object of the present invention is to realize a clamping device in a large-sized heavy-load lateral drawing method having an easy stopper pin.

[0010]

According to the present invention, one end of a hydraulic jack is connected to a clamp device which is movable along a horizontally installed rail and can be fixed at a predetermined position. Is connected to a trolley movable along the rail, a large heavy object is mounted on the trolley, and the hydraulic jack is expanded and contracted while the clamping device is fixed at a predetermined position to horizontally move the trolley along the rail. A clamp device in a large-weight horizontal pulling method for moving in a direction, wherein a stopper hole provided at a predetermined position of the rail is an oval elongated in the longitudinal direction of the rail, and the stopper pin rail is attached to the clamp device body so as to be able to move up and down. A clamp in a large-sized heavy-load horizontal drawing method, wherein a radius of curvature of a longitudinal side surface is equal to a radius of curvature of the stopper hole in a rail longitudinal direction. A location, which preferably is chamfered so as rails perpendicular sides of the stopper pin is narrower dimension than the width of the oval of the stopper hole, or,
A roller that rotates in the longitudinal direction of the rail is provided at the lower end of the stopper pin, or a guide member that is open in the width direction of the rail is attached to both sides of both ends in the longitudinal direction of the rail of the clamp device body. This is a clamp device in the above-mentioned large-sized heavy-load lateral drawing method.

[0011]

According to the present invention, the reaction force generating mechanism of the clamping device employs a pin system which is easy to operate and has a reliable operation, and is a stopper in the longitudinal direction of the rail which is a transmission portion of the reaction force. By making the side surface of the pin and the side surface of the stopper hole cylindrical surfaces having the same radius of curvature, the contact surface is widened and stress is relieved, so that deformation and damage do not occur, and the device can be used for a long time.

Further, by attaching guide members opened in the width direction of the rail to both side surfaces of both ends of the rail in the longitudinal direction of the rail of the clamp device body, even if there is a slight misalignment or bending at the connection portion of the rail, the vehicle can be transferred without any trouble. be able to.

[0013]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a state in which a large heavy object S is pulled out onto the temporary receiving frame F in the same manner as that shown in FIG. A carriage 4 on which a large heavy object S is mounted is placed on the installed rail 2. Reference numeral 1 denotes a clamping device which is movable along a rail 2 and can be fixed at a predetermined position. Reference numeral 3 denotes a hydraulic jack having one end connected to the clamping device 1 and the other end connected to a truck. The rail 2 is provided with a sliding plate such as a stainless steel strip on the surface, and the bogie 4 is provided with a slide bearing using a plate with a low friction coefficient such as fluororesin on the lower surface, and is movable along the rail. .

FIG. 2 is a side view showing the vicinity of the clamp device 1,
3 is a plan view of the same, FIG. 4 is a cross-sectional view taken along the line AA in FIG. 2, FIG. 5 is a cross-sectional view taken along the line BB of FIG. 2, 10 is a main body, 11 is a stopper pin, and 12 is a stopper pin elevating / lowering. , 13 is a floating prevention bracket attached to both ends of the main body in the moving direction, 14 is a guide member attached to both ends of the main body, 15 is a connecting pin with the hydraulic jack 3, and 21 is a slip on the top surface of the rail 2. It is a board.

That is, the floating prevention brackets 13 attached to both ends of the substantially box-shaped main body 10 in the moving direction surround the rail 2 formed by joining the plate material to the upper flange of the H-shaped steel so that the sliding material can be appropriately adjusted as necessary. The whole clamp device 1 is movable along the rail.
Further, guide members 14 which are opened in the width direction of the rail are attached to both side surfaces of both ends of the clamp device body 10 in the rail longitudinal direction. Thereby, even if the rail 2 is composed of a plurality of rails in the longitudinal direction and the connection portion is slightly misaligned or bent, it is possible to move without any trouble.

A stopper pin 11 is provided at an appropriate position of the main body 10 so as to be able to move up and down. For example, when the stopper holes 22 are provided in a pair in the width direction for one rail 2, the stopper pins 11 also need to be provided in a pair in the rail width direction. It is necessary that the interval between the stopper holes 22 is at least substantially equal to the stroke of the hydraulic jack 3. Stopper pin 11
Can be arbitrarily raised and lowered by a cylinder 12 such as a hydraulic pressure. When raising the stopper pin 11, a lifting force corresponding to its own weight is applied. Further, when dropping, it is only necessary to release the lifting force so as to fall down by its own weight, and it is not necessary to push down strongly.

A connecting pin 15 for connecting one end of the hydraulic jack 3 for lateral pulling is provided at an appropriate position on the main body 10. When the hydraulic jack 3 is connected to the hydraulic jack 3 via the spherical bush 16 fitted to the connecting pin 15, the hydraulic jack 3 can be operated without any trouble even if the connecting portion of the rail 2 is misaligned or bent. . Although not particularly shown, it is desirable to similarly use a spherical bush for the connecting portion between the hydraulic jack 3 and the bogie 4.

FIG. 6 is a horizontal sectional view showing the relationship between the stopper pin 11 and the stopper hole 22. As shown in FIG. The stopper hole 22 of the rail in the present invention has an oval shape that is long in the rail longitudinal direction. On the other hand, the stopper pin 11 is obtained by chamfering parallel surfaces of the cylindrical pin in the direction perpendicular to the rail, and the side surface in the rail longitudinal direction remains a cylindrical surface, and its radius of curvature is the same as that of the stopper hole 22 in the rail longitudinal direction. And the side surface in the direction perpendicular to the rail is narrower than the oval width of the stopper hole 22 so as to be able to absorb the linear tolerance of the rail. Accordingly, as shown in FIG. 6, when the hydraulic jack acts during the horizontal pulling, the stopper pin 11 is pressed against one end of the stopper hole 22. However, since both contact the entire cylindrical surface, the contact area is expanded and the stress is relaxed. No deformation or damage occurs. Further, since the plane perpendicular to this is made smaller than the width of the stopper hole 22 by parallel chamfering, it is possible to drop and pull out the stopper pin 11 very easily and reliably.

FIG. 7 is a perspective view of the stopper pin 11, showing the cylindrical surface 11a and a parallel chamfer 11b perpendicular to the cylindrical surface 11a. A roller 11c is attached to the lower end of the stopper pin 11. If the stopper pin 11 is dropped by its own weight while the entire clamp apparatus 1 is moved in the longitudinal direction of the rail 2, the stopper pin 11 moves smoothly on the surface of the rail 2 by the rotation of the roller 11c. When it comes to the next position of the stopper hole 22, the stopper naturally falls into the hole, so that the position of the hydraulic jack 3 can be efficiently changed in the horizontal pulling operation.

[0020]

According to the present invention, the mounting and dismounting of the stopper pin can be performed easily and reliably, and the operation can be performed without any trouble even if there is some misalignment or bending at the connecting portion of the rail. In addition, the present invention has excellent effects in improving the efficiency of the horizontal pulling operation of a large heavy object, improving safety, and improving the positioning accuracy.

[Brief description of the drawings]

FIG. 1 is a side view showing a method for horizontally pulling a large heavy object according to an embodiment of the present invention.

FIG. 2 is a partial side view showing the vicinity of the clamp device in FIG.

FIG. 3 is a partial plan view showing the vicinity of the clamp device in FIG. 1;

FIG. 4 is a sectional view taken along the line AA in FIG.

FIG. 5 is a sectional view taken along the line BB in FIG. 2;

FIG. 6 is a horizontal sectional view showing a relationship between a stopper pin and a stopper hole according to the embodiment of the present invention.

FIG. 7 is a perspective view showing a stopper pin according to the embodiment of the present invention.

FIG. 8 is a conceptual diagram illustrating a method for pulling a large heavy object horizontally according to the present invention.

FIG. 9 is a partial side view showing a main part in FIG. 8;

FIG. 10 is a sectional view of a main part showing a conventional reaction force generating mechanism.

FIG. 11 is a sectional view of a main part showing another conventional reaction force generating mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clamp device 2 Rail 3 Hydraulic jack 4 Bogie 10 (Clamp device) main body 11 Stopper pin 11a Cylindrical surface 11b Chamfered portion 11c Roller 12 Cylinder 13 Lift-up prevention bracket 14 Guide member 15 Connecting pin 16 Spherical bush 21 Slip plate 22 Stopper hole 41 Slide bearing 51 Rail 52 Friction wedge 53 Taper disk 54 Stopper pin B Foundation D Weight carrier F Temporary receiving frame S Large heavy object

Claims (4)

[Claims] An end of a hydraulic jack (3) is connected to a clamp device (1) movable along a horizontally installed rail (2) and fixed at a predetermined position, and the hydraulic jack (3) is connected to the clamp device. Is connected to a trolley (4) movable along the rail (2), a large heavy object (S) is mounted on the trolley (4), and the clamp device (1) is placed at a predetermined position. A clamp device in a large-size heavy-loading method in which a hydraulic jack (3) is expanded and contracted to move the carriage (4) in a horizontal direction along the rail (2) in a fixed state. A stopper hole (22) provided at a predetermined position has an oval shape elongated in the longitudinal direction of the rail, and a radius of curvature of a side surface in the longitudinal direction of the rail of a stopper pin (11) attached to the clamp device body (10) so as to be movable up and down. Rail longitudinal direction of hole (22) Clamping device in a large heavy crosscut method of curvature of the radius, wherein a is equal. 2. The method of claim 1, wherein the side surface of the stopper pin (11) perpendicular to the rail is chamfered so as to have a dimension smaller than the width of the oval of the stopper hole (22). Clamping device. 3. The clamping device according to claim 1, further comprising a roller (11c) that rotates in the longitudinal direction of the rail at the lower end of the stopper pin (11). 4. The clamping device according to claim 1, wherein guide members (14) opened in the width direction of the rail are attached to both side surfaces of both ends in the longitudinal direction of the rail of the clamping device body (10). Clamping device for large heavy load horizontal pulling method.