JP2806809B2 - Bolt tensioner transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bolt tensioner conveying device, and more particularly to a device for lifting a plurality of tensioners in an operable state with a hoist so that stud bolts can be easily and reliably tightened. Related to new improvements.

[0002]

2. Description of the Related Art Conventionally, as a means for transporting a bolt tensioner of this kind, a tensioner is generally lifted by hand, mounted on a stud bolt, and the stud bolt is tightened. The bolt tensioner was manually returned to the original position again. As another means, a bolt tensioner is lifted using a belt or the like.

[0003]

The conventional means for transporting a bolt tensioner is constructed as described above, and therefore has the following problems. That is, 1. It is not possible to handle multiple tensioners simultaneously. 2. Work time is too long. 3. Many workers are required. 4. One crane or chain block is required for one tensioner, and when there is no tensioner, it is necessary to change the suspension. 5. It is difficult to position the tensioner. 6. It was dangerous work to handle the tensioner as a heavy object when operating the tensioner.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In particular, it is possible to lift a plurality of tensioners in an operable state with a hanging tool, and to easily and securely tighten stud bolts. It is an object of the present invention to provide a bolt tensioner transfer device that can be used.

[0005]

According to the present invention, there is provided a bolt tensioner transfer device, comprising: a ring-shaped rail formed on a ring-shaped main body; a hanging member movably provided on the ring-shaped rail; And a tensioner provided inside.

[0006] More specifically, the hanger can be fixed at an arbitrary circumferential position via fixing pins inserted into a plurality of mounting holes formed along the circumference of the ring-shaped main body. is there.

More specifically, the ring-shaped main body includes:
A ring-shaped hand wheel is provided, and the ring-shaped main body is rotated via the ring-shaped hand wheel.

More specifically, the tensioner is mounted via a pair of tensioner mounting brackets provided on the ring-shaped main body.

[0009] More specifically, the tensioner mounting bracket and the bracket of the tensioner are connected via an elastic cushioning member.

[0010]

In the bolt tensioner transporting device according to the present invention, a plurality of tensioners are mounted inside the ring-shaped main body, and the mounting positions thereof are adjusted in advance to the pitch of the stud bolt of the object, so that the lifting tool is moved by a crane. The plurality of tensioners are simultaneously lifted by lifting. In this lifted state, each tensioner is mounted on each stud bolt by operating the ring-shaped hand wheel, and each stud bolt can be tightened by one operator by operating each tensioner. Further, after the completion of the tightening operation, each tensioner can be safely and easily returned to the original position by moving the ring-shaped main body via the crane and the hanging tool. Therefore, it is possible to reduce the working time and the number of working personnel, and to expel the generally referred to 3K work.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a bolt tensioner conveying device according to the present invention will be described below in detail with reference to the drawings.
1 to 5 show a bolt tensioner conveying device according to the present invention, wherein FIG. 1 is a front view, FIG. 2 is a plan view including a partial cross section of FIG. 1, and FIG. 4 is a sectional view of FIG. 3, and FIG. 5 is an enlarged sectional view of the tensioner mounting bracket.

1 and 2 is a ring-shaped main body having a ring-shaped overall shape and a ring-shaped rail 2 at an outer peripheral position thereof. 3 is provided movably in the circumferential direction. As shown in FIGS. 3 and 4, the hanger 3 has a pair of hooks 5 on an upper part of the hanger main body 4, and a pair of guide rollers 6 inside the hanger main body 4. 7 is rotatably provided via a bearing 8.

The guide rollers 6 are disposed apart from each other in the axial direction, and each guide roller 6 is in sliding contact with the inner surface 2 a of the ring-shaped rail 2. A plurality of mounting holes 10 are formed at a predetermined different pitch inside the ring-shaped rail 2 of the ring-shaped main body 1, and the fixing pin inserted into the guide hole 3 a of the hanging body 3 and the mounting hole 10. 11, the hanging tool 3 is configured to be able to be fixed to an arbitrary circumferential position of the ring-shaped main body 1. The pitch of each of the mounting holes 10 is configured to be different from each other, and the size of the pitch is configured so that the large or small hanging tool 3 can be attached as necessary, and Handle 1 at the end of pin 11
1a is formed.

A ring-shaped hand wheel 15 is arranged at the outer peripheral position of the ring-shaped main body 1 via a joint 14 in parallel with the ring-shaped main body 1. By rotating the ring-shaped hand wheel 15, the ring-shaped hand wheel 15 is rotated. The main body 1 is configured to rotate integrally.

On the inner side 1a of the ring-shaped main body 1, a bracket 21a of a tensioner 21 having a well-known structure for tightening stud bolts via a pair of tensioner mounting brackets 20 is provided with connection pins 22 with some degree of freedom. The tensioner mounting brackets 20 are connected by connecting bolts 23 to a plate 31 fixed to the inside 1a by welding or the like. Note that the fixing position is determined by the size of the tensioner 21 selected in advance according to the use situation, and by arbitrarily selecting the size of the bracket 21a and the fixing position thereof, the tensioners 21 having different sizes can be mounted. .

As shown in FIG. 5, the tensioner mounting bracket 20 has a concave portion 20a which is formed in a substantially U-shape in an up-and-down bifurcated manner, and a connecting ring 21aA of the bracket 21a is provided in the concave portion 20a. Pair spacer 30
Is provided via The connection pin 2 provided through the hole 20b of the tensioner mounting bracket 20
Reference numeral 2 penetrates the connection ring 21aA, and between the connection pin 22 and the connection ring 21aA, a rubber or the like having elasticity sandwiched by a pair of thin iron rings 40 and 41 having different diameters from each other. A ring-shaped buffer member 50 is provided. Therefore, the tensioner mounting bracket 20 and the bracket 21a are connected to the tensioner 21 with some degree of freedom via the buffer member 50.

As is well known, the tensioner 21 is provided on a stud bolt 60 (for example, as shown by a dotted line in FIG. 1, for example, a pressure vessel flange as an object, and is shown by a double dotted line). Means that both large and small diameters can be accommodated), by inserting the fitting screw 21A by rotating the handle 21B and connecting it to the stud bolt 60 to perform the tightening operation. It is configured to be able to.

Next, a case where stud bolts provided on a pressure vessel flange or the like are actually tightened in the above-described configuration will be described. First, as shown in FIG.
Ring-shaped main body 1 having a pair of tensioners 21 provided in accordance with the mounting position of the other stud bolt 60
Is lifted by a hook of a crane (not shown) via a hook (not shown) on a hook 5 of the hanging tool 3 and the ring-shaped main body 1 is conveyed to a predetermined position of the other party. By moving each tensioner 21 to the center of the stud bolt 60 and rotating the handle 21B, the tensioner 21 and the stud bolt 60 are connected, and a tightening operation is performed.

After the tightening operation is completed, each tensioner 21 is separated from the stud bolt 60, and the ring-shaped main body 1 is transported to the original position by a crane, and each tensioner 21 is easily returned to the original position together with the ring-shaped main body 1. be able to. In the above embodiment, the case where a pair of tensioners is used has been described. However, two or more tensioners can be added.

[0020]

The bolt tensioner transfer device according to the present invention is configured as described above, and therefore, can obtain the following effects. 1. Compared to the conventional case where tensioners are manually lifted one by one and installed on the tightening bolts, the present invention can transport a plurality of tensioners safely and easily, and significantly reduces the risk of handling heavy objects. It is also effective in improving dirty, hard and dangerous). 2. In the present invention, the tensioner can be fixed and installed at an accurate position as compared with a case where the tensioner is conventionally lifted and installed by a belt or the like, and the complexity of the operation is reduced. In addition, in order to move the tensioner to another bolt, it is necessary to change the suspension. On the other hand, in the present invention, no change is required. 3. A plurality of tensioners can be fixed and installed at one time, which is effective in reducing working time and reducing the number of workers. 4. A plurality of tensioners can be simultaneously transferred and fixedly installed by one crane or chain block.

[Brief description of the drawings]

FIG. 1 is a front view showing a bolt tensioner transport device according to the present invention.

FIG. 2 is a plan view including a partial cross section of FIG.

FIG. 3 is a front view showing the hanger of FIG. 1;

FIG. 4 is a sectional view of FIG. 3;

FIG. 5 is an enlarged cross-sectional view of a tensioner mounting bracket.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ring-shaped main body 2 Ring-shaped rail 3 Hanging tool 10 Mounting hole 11 Fixed pin 15 Ring-shaped handwheel 20 Tensioner mounting bracket 21 Tensioner 21a Bracket

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16B 35/00

Claims (5)

(57) [Claims] A ring-shaped rail (2) formed on a ring-shaped body (1), a hanger (3) movably provided on the ring-shaped rail (2), and a ring-shaped body (1). ), And a tensioner (21) provided inside the bolt tensioner transport device. 2. The hanging tool (3) can be optionally mounted via fixing pins (11) inserted into a plurality of mounting holes (10) formed along the circumference of the ring-shaped main body (1). 2. The bolt tensioner transport device according to claim 1, wherein the bolt tensioner transport device can be fixed at a circumferential position. 3. The ring-shaped main body (1) is provided with a ring-shaped handwheel (15), and the ring-shaped main body (1) is rotated through the ring-shaped handwheel (15). 3. The bolt tensioner conveying device according to claim 1, wherein: 4. The tensioner (21) includes a pair of tensioner mounting brackets (2) provided on the ring-shaped main body (1).
2. The method according to claim 1, wherein the mounting is performed via the first connection.
4. The bolt tensioner transport device according to any one of claims 3 to 3. 5. The tensioner mounting bracket (20) and the bracket (21a) of the tensioner (21) are connected via an elastic cushioning member (50). Bolt tensioner conveyor.