JPH0723779U - U-shaped block hanging - Google Patents

Abstract

(57) [Summary] [Purpose] A U-shaped block hanger that has a simple structure and can be safely and reliably hoisted and is easy to handle and maintain. [Structure] A base 5 installed in the U-shaped block 2 and fixed to the upper surface of the base 5 and formed longer than the groove width dimension of the U-shaped block 2, and both ends when the U-shaped block 2 is lifted. Is a stopper 10 for preventing the U-shaped block 2 from swinging by hitting the inner side surfaces 4a, 4b of the U-shaped block 2, and an upper end rotatably attached near both ends of the stopper 10 and the U-shaped block 2 A chain 21 stretched in an oblique direction with respect to the inner side surfaces 4a and 4b of the U-shaped block 2 at the time of hoisting, and the rear end is attached to the lower end of the chain 21 to be formed slightly longer than the groove width dimension of the U-shaped block. At the same time, when the U-shaped block 2 is lifted, the front end portion and the rear end portion are in pressure contact with the inner side surface of the U-shaped block 2 so as to generate a frictional force with the inner side surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hoisting tool for hoisting a U-shaped block by a simple means when laying the U-shaped block in a gutter of a road or the like, and particularly, utilizing a frictional force with an inner surface of the U-shaped block. The present invention relates to a lifting tool of a U-shaped block.

[0002]

[Prior art]

 Conventional U-shaped block hoisting tools are roughly classified into two types as hoisting means. One is a type in which the upper part of the side wall of the U-shaped block is gripped by a clamp member, but this may cut the laying thread stretched along the side groove by the clamp member. The other is of a type in which the U-shaped block is lifted by the frictional force of the arm members on both inner surfaces, for example (see, for example, Japanese Unexamined Patent Publication No. 4-80439 and Japanese Utility Model Laid-Open No. 4-16779). . In this case, since the above-mentioned yarn is not an obstacle, these lifting means have become the mainstream these days.

[0003]

[Problems to be solved by the device]

 However, many of the conventional U-shaped block suspensions have complicated structures, such as the expansion and contraction of the arm members being hydraulically operated, and therefore, handling and maintenance are troublesome and expensive. There was a problem that became.

Therefore, an object of the present invention is to simplify the structure and facilitate handling and maintenance, and at the same time, to provide at low cost.

[0005]

[Means for Solving the Problems]

 That is, the U-shaped block suspender according to the present invention comprises a base installed in the U-shaped block and a base fixed to the upper surface of the U-shaped block and longer than the groove width of the U-shaped block. The rocking part that prevents both ends from hitting the inner surface of the U-shaped block when it is lifted and the U-shaped block is swayed. At the time of hoisting, a hanging part that is stretched diagonally to the inner surface of the U-shaped block, and a rear end is attached to the lower end of this hanging part to form a slightly longer groove width than the U-shaped block. When the block is hoisted, the front end portion and the rear end portion are provided with a press-contact plate which press-contacts the inner side surface of the U-shaped block to generate frictional force between the block and the inner side surface.

[0006]

[Action]

 According to the above-mentioned means, first, the main suspension is put in the U-shaped block and the base is stably installed on the bottom surface of the U-shaped block, and then the pressure contact plates are attached to both inner side surfaces of the U-shaped block. They are placed so that they are orthogonal to each other, and the tip end side is slightly raised, and it is laid between both inner side surfaces. After the hoisting is completed in this way, when the hoist is lifted by a crane or the like, the pulling force is transmitted to the press contact plate through the hanging part, and the rear end of the press plate is first pulled up, but the hanging part is inclined to the inner surface. Since it is taut in a tight state, the rear end of the pressure plate strongly presses against the inner surface from below and bites into the inner surface to generate a large frictional force. On the other hand, when the rear end of the pressure contact plate receives the pulling force, the front end of the pressure contact plate also strongly presses the inner side surface, and like the rear end, it strongly presses the inner side surface from below as well, and bites into the inner side surface to generate a large force. Generates frictional force. Therefore, when the main suspension is lifted, the front and rear end portions of the pressure contact plate are strongly pressed against the inner surface to generate a large frictional force, so that the U-shaped block can be suspended by this frictional force.

[0007]

【Example】

 Hereinafter, an embodiment of the U-shaped block suspender 1 according to the present invention will be described in detail with reference to the accompanying drawings. As shown in FIGS. 1 to 5, the U-shaped block lifting device 1 according to this embodiment includes a cylindrical base 5 installed in the U-shaped block 2 when the U-shaped block 2 is lifted, and the base 5. The rocking | fluctuation part 10 welded and fixed to the upper surface plate 6 of the stand 5 is provided.

A flange portion 7 is formed on the lower edge of the base 5 to ensure the stability of the base 5 when it is installed on the bottom surface 3 of the U-shaped block 2. Moreover, the rocking | swiveling part 10 is comprised by the trapezoidal hanging plate 11, and the flat plate-shaped rocking plate 12 welded to the lower end. The hoisting holes 13 of the U-shaped block hoisting tool 1 are formed in the vicinity of the top of the hoisting plate 11, and the rectangular cutout grooves 14 are formed in the lower parts of both sides. On the other hand, the rocking plate 12 has the same width as the lifting plate 11, and rounded portions 15 are formed at both ends thereof. Further, the length of the rocking plate 12 is longer than the groove width dimension W1 of the U-shaped block 2, and when the rocking plate 12 is installed in the U-shaped block 2, as shown in FIG. Is inclined and the rounded portions 15 at both ends are brought into contact with the inner side surfaces 4a, 4b of the U-shaped block 2. Further, as shown in FIG. 2, the rocking plate 12 is formed with a shackle insertion hole 16 at a position corresponding to the cutout groove 14 of the lifting plate 11, and in the vicinity thereof as shown in FIG. A U-shaped groove 17 as shown in FIG. 2 and a pair of engagement pins 18 standing upright at both ends thereof are provided.

The U-shaped block suspending tool 1 includes a pair of pressure contacts below the rocking portion 10 whose both ends are fixed to the inner side surfaces 4 a and 4 b of the U-shaped block 2 when the U-shaped block 2 is lifted. A plate 26 is provided via the hanging part 20. The hanging part 20 is composed of a chain 21 and shackles 22 and 23 fixed to the rocking plate 12 and the pressure contact plate 26 above and below the chain 21. In the upper shackle 22, as shown in FIG. 2, the tip of the shaft portion that penetrates the insertion hole 16 is tightened in the cutout groove 14 by double nuts 24a and 24b. Therefore, the upper shackle 22 is prevented from coming off from the insertion hole 16, while the shackle 22 itself can freely rotate together with the double nuts 24a and 24b. The lower shackle 23 is attached to the rear end of the pressure contact plate 26. The length of the chain 21 is adjusted appropriately.

On the other hand, the press-contact plate 26 is formed in a rectangular shape whose front and rear lengths are slightly longer than the groove width W1 of the U-shaped block 2, and is reinforced by ribs 28 provided upright on the upper surface thereof. ing. The lower shackle 23 is fixed to the rear end of the rib 28, so that the front end side hangs down as shown in FIG. 1. However, locking pins 29 are provided on both sides near the tip of the rib 28. Therefore, when carrying the main suspension, as shown in FIG. 4, insert the rib 28 into the U-shaped groove 17 and lock the rib 28 to the engaging pins 18 on both sides of the U-shaped groove 17. By engaging the pin 29, the pressure contact plate 26 can be stored in an upright state. The front end of the pressure contact plate 26 has a pointed shape to increase the fixing force with the U-shaped block 2.

Next, the operation of the U-shaped block suspender 1 having the above configuration will be described. First, as shown in FIGS. 4 and 5, the main hanging tool is put in the U-shaped block 2 and the base 5 is stably installed on the bottom surface 3 of the U-shaped block 2. At this time, as shown in FIG. 5, the base 5 is placed so that the rounded portions 15 at both ends of the rocking plate 12 just contact the inner side surfaces 4a and 4b of the U-shaped block 2. Next, the press-contact plate 26 is arranged so as to be orthogonal to both inner side surfaces 4a, 4b of the U-shaped block 2 and, as shown in FIG. Hang it between 4b. At this time, the front end portion 32 and the rear end portion 33 of the pressure contact plate 26 are in contact with the respective inner side surfaces 4a and 4b. Further, the chain 21 is stretched outwardly, and an angle θ is formed between the axis 34 of the chain 21 and the axes 35 of the inner side surfaces 4a and 4b.

After the hoisting preparation is completed in this way, as shown in FIG. 6, the hook 40 is hooked to the insertion hole 16 provided at the top of the hoisting plate 11 and hoisted by a crane (not shown) or the like. . Then, the pulling force is transmitted to the pressure contact plate 26 through the chain 21, and the rear end portion 33 of the pressure contact plate 26 is first pulled up. At the same time, since the pressure contact plate 26 itself is arranged in a state of being inclined upward and upward, the rear end portion 33 of the pressure contact plate 26 is strongly pressed against the inner side surface 4b from below as shown in FIG. It bites into and creates a large frictional force. On the other hand, when the rear end side of the pressure contact plate 26 receives the pulling force, the pressure contact plate 26 itself receives the force in the front oblique direction shown by the arrow A as shown in FIGS. 7 and 8. As a result, the front end portion 32 of the press contact plate 26 strongly presses the inner side surface 4a, and the inner side surface 4a is also strongly pressed from the lower side similarly to the rear end portion 33, so that the inner side surface 4a is bitten and large. Generates frictional force.

As described above, in the U-shaped block suspender 1 according to the present invention, the front and rear end portions 32 and 33 of the pressure contact plate 26 are strongly pressed against the inner side surfaces 4a and 4b when the lift plate 11 is lifted by the hook 40 or the like. As a result, a large frictional force is generated, so that the U-shaped block 2 can be lifted by this frictional force.

On the other hand, when the press contact plate 26 is fixed to the inner side surfaces 4a and 4b, the rounded portions 15 formed at both ends of the rocking plate 12 also come into contact with the upper portions of the inner side surfaces 4a and 4b. As a result, the upper portion of the U-shaped block 2 is supported by the rocking plate 12 and the lower portion of the U-shaped block 2 is supported by the pressure contact plate 26, so that the swinging movement of the U-shaped block 2 during lifting is reliably prevented. It will be.

FIG. 9 shows an embodiment in which the U-shaped block suspension 1 according to the present invention is applied to U-shaped blocks 2 having different groove width dimensions. In this embodiment, the groove width dimension W2 of the U-shaped block 2 is larger than the groove width dimension W1 of the U-shaped block 2 described above. In this embodiment, the base 5, the rocking portion 10 and the hanging portion 20 are the same as those in the above-mentioned embodiment, and only the pressure contact plate 26a is of a length corresponding to the groove width dimension W2. The same lifting effect as described above can be obtained simply by replacing. In this case, the mounting position of the locking pin 29a provided on the rib 28a of the pressure contact plate 26a is near the central portion.

[0016]

[Effect of device]

 As described above, according to the U-shaped block hoisting tool of the present invention, it is possible to safely and reliably hoist the press-connecting plate, though it has a simple structure of hanging it between the inner side surfaces on both sides of the U-shaped block. In addition to being easy to handle and maintain, it is possible to supply at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a U-shaped block suspender according to the present invention.

FIG. 2 is an enlarged view of a chain attachment portion of the U-shaped block suspender.

FIG. 3 is a perspective explanatory view when carrying the U-shaped block hanging tool.

FIG. 4 is a front view of the U-shaped block hanging device installed in the U-shaped block.

FIG. 5 is a plan view of FIG.

FIG. 6 is a perspective view when the U-shaped block is lifted by the U-shaped block hanging tool.

FIG. 7 is a cross-sectional view showing a rear end portion of the pressure contact plate when the U-shaped block is lifted.

FIG. 8 is a cross-sectional view showing a front end portion of the pressure contact plate when the U-shaped block is lifted.

FIG. 9 is a plan view of a U-shaped block suspender installed on a U-shaped block having a large groove width dimension.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 U-shaped block hanging tool 2 U-shaped block 4a Inner side surface 4b Inner side surface 10 Shaking part 20 Hanging part 26 Pressure contact plate 32 Front end part 33 Rear end part

Claims (1)

[Scope of utility model registration request] 1. A base installed in a U-shaped block and a base fixed to the upper surface of the U-shaped block and longer than the groove width dimension of the U-shaped block. A swinging part that prevents the U-shaped block from swinging by hitting the inner surface of the block, and an upper end rotatably attached near both ends of the swinging part, and when the U-shaped block is lifted, it is attached to the inner surface of the U-shaped block. And the rear end is attached to the lower end of this hanging part so that it is formed slightly longer than the groove width dimension of the U-shaped block, and at the time of lifting the U-shaped block, the front end and the rear end are Is provided with a pressure contact plate that presses against the inner side surface of the U-shaped block to generate a frictional force between the inner side surface and the U-shaped block.