JP3137572B2 - Pipe joining equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joining apparatus for joining a pair of pipes.

[0002]

2. Description of the Related Art For example, when laying a pipeline by joining a plurality of cast iron pipes, conventionally, a wire rope is wound around each pipe to be joined, and a lever block is spread between both wire ropes. It is common to operate both levers to draw both tubes together.

[0003]

However, in such a conventional apparatus, it takes time and effort to wind the wire rope around each pipe, and if the winding by the wire rope is not sufficient, the lever block is operated. When this occurs, there is a problem that the wire rope may slide along the pipe surface in the axial direction of the pipe, so that the required joining force may not be transmitted to the pipe.

Accordingly, an object of the present invention is to solve such a problem and to surely transmit a joining force to a pipe with a simple structure.

[0005]

SUMMARY OF THE INVENTION To achieve this object, the present invention is to fix an annular body to the outer periphery of the end of one and the other pipes which are joined to each other in an fitted state. A means for approaching each other, each annular body is divided into two parts in the circumferential direction and has a pair of body parts, and the groove width gradually increases on the inner periphery of each annular body from the groove bottom toward the inner peripheral side. When the V-belt is formed in the V-belt groove, the V-belt is fitted into the V-belt groove, and the annular body is fixed to the outer periphery of the end of the pipe by an external fitting.
The rear surface of the belt is configured to be in contact with the outer surface of the tube, and the center of the arc that forms the bottom surface of the V-belt groove is provided at a distance from the center of the arc that forms the inner periphery of each main body. Both ends of the V-belt accommodated in the main body are configured to be wider than other portions.

With such a configuration, the annular body is fixed to the outer periphery of the pipe with the back surface having a large surface area of the V-belt in contact with the outer circumference of the pipe, so that the annular body and the pipe are securely fixed. As a result, the occurrence of slippage in the pipe axis direction when the annular bodies are brought close to each other by the approaching means is prevented. V formed on the inner periphery of the annular body
With the V-belt fitted in the belt groove, simply fitting the annular body to the outer periphery of the end of the tube simply applies a joining force to each tube. In addition, since the center of the arc forming the bottom surface of the V-belt groove is provided at a distance from the center of the arc forming the inner periphery of each main body, both ends of the V-belt accommodated in each main body are formed. Since it is configured to be wider than the other parts, when the main body containing the V-belt is put on the pipe, the inner peripheral part protruding from the V-belt groove at both ends of this V-belt is prevented from hitting the pipe. Is done.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
Reference numeral 2 denotes a pair of tubes joined to each other, and a receiving port 3 is formed at an end of one of the tubes 1, and a receiving port 3 is formed at an end of the other tube 2.
An insertion opening 4 to be inserted into the receiving opening 3 at the time of joining is formed. FIG. 9 shows a state in which the tubes 1 and 2 are joined together, and FIG. 10 shows a state in which the joints of the tubes 1 and 2 are broken and the joint is disassembled.

In FIG. 9, reference numeral 11 denotes a joining device according to the present invention, which has a pair of annular bodies 12 and 13 which are fitted and fixed to the ends of the tubes 1 and 2, respectively. FIG. 1 shows each ring 12,
13 is shown in detail. As shown in the drawing, each of the annular bodies 12 and 13 is configured to be divided into two in the circumferential direction, and a pair of crescent-shaped main bodies 1 is formed.
The main body parts 14 and 15 are joined to each other by a fastening part 16 at two divided parts along the circumferential direction, so that the main body parts 14 and 15 are joined to the outer circumference of the pipes 1 and 2 in an annularly assembled state. Fixed. As shown in the figure, the pair of main body portions 14 and 15 are configured in the same shape, and are arranged at positions symmetrical with respect to each other. By doing so, it is sufficient that the main body parts 14 and 15 have the same structure. For example, when this is manufactured by casting, there is an advantage that only one type of die is required. In order to obtain a pair of annular bodies 12 and 13, it is sufficient to manufacture a total of four identically structured main bodies.

FIGS. 2 and 3 show the detailed structure of the fastening portion 16. FIG. A bolt receiving portion 17 is provided on one of the main body portions 14 and 15 in the circumferential division portion, and a nut receiving portion is provided on the other.
18 are provided. A cut portion 19 is formed in the bolt receiving portion 17, and a cut portion 20 is formed in the nut receiving portion 18.

Reference numeral 22 denotes a tightening bolt, which integrally has a plate-like portion 23 that fits into the notch 19 of the bolt receiving portion 17 and a bolt portion 24 that fits into the notch 20 of the nut receiving portion 18. The tightening bolt 22 is supported at its plate-like portion 23 by a tube-axial mounting pin 25 provided in the cutout portion 19, and is pivotable around the mounting pin 25 along a surface in the pipe radial direction. It has been. The tightening bolt 22 causes the bolt portion 24
However, it is configured so as to enter into the cutout portion 20 of the nut receiving portion 18 and exit from the cutout portion 20.

The nut receiving portion 18 is formed with a support surface 26 facing the direction opposite to the bolt receiving portion 17 except for the notch portion 20. A pair of semi-circular concave support grooves 27 are formed with the interposed therebetween. A stepped collar 28 is provided using these support grooves 27. In detail, the stepped collar 28 is formed by integrally forming a collar body 29 that fits into the cutout portion 20, and a pair of arms 30 that fit into each support groove 27,
The arm portion 30 is formed in a D shape so as to slightly protrude from the support groove 27. Therefore, the stepped collar 28 is rotatable along the support groove 27 in a state where the arm 30 is supported by the support groove 27, and the collar body 29 fits into the cut portion 20, so that the tube axis direction It is configured not to move.

Further, a bolt hole 31 is formed in the stepped collar 28, and the bolt portion 24 of the tightening bolt 22 fitted in the cut portion 20 is formed so as to pass through the bolt hole 31 as shown in the drawing. I have. A nut 32 is screwed into the bolt portion 24 of the tightening bolt 22 at a tip portion protruding from the stepped collar 28.

Therefore, by tightening the nut 32 in a state where the main bodies 14, 15 are fitted on the outer circumferences of the tubes 1, 2, the bolt receiving portion 17 and the nut receiving portion 18 are fastened to each other. The main bodies 14, 15 are fixed to the outer circumferences of the tubes 1, 2. At this time, a gap 35 having a constant interval is formed between the opposing surfaces 33 and 34 of the bolt receiving portion 17 and the nut receiving portion 18. Also, since the tightening bolt 22 can be pivoted around the center of the mounting pin 25 and the center of the arm 30 of the stepped collar 28,
Due to this rotation, the bolt receiving portion 17 and the nut receiving portion 18 are slightly displaced from each other, so that it is possible to perform centering of the main bodies 14, 15 and the tubes 1, 2.

As shown in FIG. 2, a portion of the bolt receiving portion 17 which is closer to the nut receiving portion 18 than the mounting pin 25 and is located outside the mounting pin 25 in the tube radial direction is provided with the mounting pin 25. A round portion 36 is formed having a center at the center and a radius equal to the distance from the center of the mounting pin 25 to the surface 33. Therefore, a portion of the bolt receiving portion 17 located outside the mounting pin 25 in the tube radial direction is configured to be located farther from the nut receiving portion 18 than the surface 33.

In the nut receiving portion 18, a stepped collar 28
Consider a circular arc 38 whose radius is the distance X from the center of the arm 30, ie, the center of the support groove 27, to the corner 37 of the surface 34 that is farthest from the tubes 1, 2. Also, consider an arc 39 having a radius equal to the distance Y from the center of the support groove 27 to the surface 33 of the bolt receiving portion 17. Further, consider an arc 40 having a radius equal to the distance Z from the center of the support groove 27 to the surface 34 of the nut receiving portion 18. In such a case, the magnitude relationship between the distances X, Y, and Z is X
> Y and X> Z, the positions of the respective parts are set in advance.

This is because the arm 30 of the stepped collar 28 merely fits in the support groove 27 as described above. If no dimensional restriction is imposed, the bolt receiving portion 17 and the nut receiving portion For example, when 18 and laterally offset from each other,
This is because the arm 30 may fall off from the support groove 27. On the other hand, if the magnitude relation between the dimensions is set as described above, when the bolt receiving portion 17 and the nut receiving portion 18 are laterally displaced from each other as described above, the corner portion 37 becomes the surface 33. Therefore, such falling off is surely prevented.

The annular members 12 and 13 are provided with a structure for moving the annular members 12 and 13 closer to and away from each other. That is, as shown in FIGS.
FIGS. 9 and 10 show the main bodies 14, 15 of the annular bodies 12, 13, respectively.
As shown in FIG. 7, a mounting seat 43 for a tube-direction joining bolt 42 extending between the annular members 12 and 13 spaced apart in the direction of the tube axis is integrally formed. The mounting seat 43 has counterbore portions 44 formed on both sides thereof, and a U-shaped groove 45 extending from the outer peripheral side toward the center of the counterbore portion 44.

Therefore, as shown in FIGS.
The nut 46 is fitted into the groove 45 and tightened by the nut 46 so that the flange 47 of the nut 46 comes into pressure contact with the counterbore 44, thereby allowing the pair of annular bodies 12, 13 to approach each other. Can generate force. At this time, the flange 47 is fitted into the counterbore 44, so that the joining bolt 42 is prevented from dropping out of the U-shaped groove 45. Note that the mounting seat 43 is formed on each of the main body portions 14 and 15, so that the mounting seat 43 is disposed at a position every 180 degrees along the circumferential direction.

Each of the main bodies 14, 15 is provided with a hook engaging portion 48 with which a hook such as a chain block can be engaged in order to draw the annular bodies 12, 13 together using a chain block or the like. Have been. These hook engaging portions 48 are also arranged at positions every 180 degrees along the circumferential direction, and the mounting seat 43 and the hook engaging portions 48
By being provided at positions spaced by 90 degrees from each other, mutual interference is prevented. Further, as shown in FIG. 1, the mounting seat 43 and the hook engaging portion 48 are arranged at a distance from the fastening portion 16 in the circumferential direction.

As shown in FIGS.
A V-belt groove 51 is formed on the inner circumference of the main body portions 14 and 15. The V-belt groove 51 is formed so that the groove width gradually increases from the groove bottom toward the inner peripheral side, so that the V-shaped belt 52 having a trapezoidal cross section can be accommodated such that the back surface 53 is on the inner peripheral side. It is configured as follows.

As shown in FIG. 1, the V-belt 52 is
It is used after being cut into lengths corresponding to the circumferential length of the V-belt groove 51 at 14 and 15. As shown in FIGS. 7 and 8, a V-belt locking portion 54, which can engage with the cut end of the V-belt groove 51, is provided on the main body portions 14, 15 along a circumferential direction.
Both ends of the belt groove 51 are formed so as to close the V-belt groove 51. Accordingly, the V-belt 52 is housed in the V-belt groove 51 and both ends thereof are engaged with the locking portion 54, so that the V-belt 52 is held by the inner peripheral portions of the main bodies 14, 15. With this configuration, there is an advantage that it is not necessary to use a screw or a tool for operating the screw to attach the V-belt 52.

As shown in FIG. 7, the center 55 of the circular arc forming the bottom surface of the V-belt groove 51 is larger than the center 56 of the circular arc forming the inner circumference of the main bodies 14 and 15, ie, the outer circumference of the tubes 1 and 2. Distance S
It is provided only at a position distant. By doing this, V
When both ends of the V-belt 52 accommodated in the belt groove 51 are wider than the other portions, the V-belt 52
The inner peripheral portions protruding from the V-belt groove 51 at both ends of the 52 are prevented from hitting the pipes 1 and 2.

In such a configuration, when joining the tubes 1 and 2, the annular bodies 12 and 13 are fitted to the one tube 1 and the other tube 2, respectively, as shown in FIG. I do. At this time, the V-belt 52 cut into a predetermined length is fitted into the V-belt groove 51 of each of the annular bodies 12 and 13, and both ends of the V-belt 52 are engaged with the V-belt locking portion 54, so that the V-belt
52 is held in the V-belt groove 51.

To form the fastening portion 16, a stepped collar 28 is fitted onto a bolt portion 24 of a fastening bolt 22 supported by a mounting pin 25, and a nut 32 is screwed.

In this state, one of the main bodies 14 and 15 is placed, for example, below the pipes 1 and 2 and the other is placed on the pipes 1 and 2 from above, and the tightening bolt 22 is attached to the bolt receiving section 17. Is turned around the mounting pin 25 at the notch 19, the bolt portion 24 is fitted into the notch 20 of the mating nut receiving portion 18, and the arms 30 at both ends of the stepped collar 28 are fitted into the support grooves 27. Then, by tightening the nut 32 screwed to the bolt portion 24, one of the pair of fastening portions 16 is temporarily fixed.

Next, the other connecting portion 16 is operated in the same manner. At this time, the dimensions X, Y, Z
Is defined, the stepped collar 28 falls out of the support groove 27 at the temporarily fixed fastening portion 16 and the occurrence of a situation where the fastening portion 16 is released from the temporarily fastened state is prevented. You.

As described above, by operating the fastening portions 16 on both sides, the annular bodies 12 and 13 constituted by the pair of main bodies 14 and 15 are fixed to the outer circumferences of the pipes 1 and 2, respectively. When the main body portions 14 and 15 are put on the pipes 1 and 2, the center 55 of the arc forming the bottom surface of the V-belt groove 51 and the pipes 1 and 2 as described above.
Is separated by a distance S from the center 56 of the arc constituting the outer periphery of the V-belt 52, so that both ends of the V-belt 52 are wider than the other portions, and both ends can hit the pipes 1 and 2. It is very easy to work because it is prevented.

When the annular bodies 12 and 13 are fixed to the outer circumferences of the tubes 1 and 2, only the rear surface 53 of the V-belt 52 protruding from the V-belt groove 51 to the inner circumference side is in contact with the outer circumferences of the pipes 1 and 2. That is, the main body portions 14 and 15 themselves do not come into contact with the outer circumferences of the tubes 1 and 2, so that the generation of flaws on the surfaces of the tubes 1 and 2 is prevented. Since the cut V-belt 52 is used, it is versatile and convenient when replacing the belt.

When fixing the annular bodies 12 and 13 to the outer circumferences of the pipes 1 and 2, the connecting bolts 42 are previously attached to the annular bodies 12 and 13
By being fitted over the U-shaped groove 45 of the mounting seat 43, the positions of the annular bodies 12 and 13 in the circumferential direction can be aligned. Then, when the fixing of the annular bodies 12 and 13 is completed, the flange 47 of the flanged nut 46 screwed to the joining bolt 42 is brought into contact with the counterbore 44 of the mounting seat 43. And,
By further tightening the nut 46 in this state,
A force in a direction approaching each other is applied to the annular bodies 12 and 13, whereby the insertion port 4 of the tube 2 is inserted into the receiving port 3 of the tube 1, and the joining of the tubes 1 and 2 is performed. Will be At this time, since the rear surface of the V-belt 52 is in pressure contact with the surfaces of the tubes 1 and 2, slippage is prevented.

When this joining operation is completed, the flanged nut 46 is loosened and the joining bolt 42 is removed from the mounting seat 43. In addition, loosen the nut 32 of the fastening section 16 to
The arm 30 of 28 is moved out of the support groove 27, and then the tightening bolt 22 is pivoted around the mounting pin 25 to release the engagement between the tightening bolt 22 and the nut receiving portion 18. In this way, the engagement can be released only by loosening the nut 32, so that the operation can be easily performed.

Instead of using the joining bolts 42 associated with the mounting seat 43 as described above, the annular body 12 is formed using a hook block 48 of the annular bodies 12 and 13 using a chain block or the like. , 13 can be similarly brought close to each other to the annular bodies 12, 13 to join the tubes 1, 2 together.

When the joined tubes 1 and 2 are dismantled, the insertion of the tube 2 is performed with one of the annular bodies 12 in contact with the end face 57 of the receiving port 3 of the tube 1 as shown in FIG. 4. Fit to 4 and fix. Further, the other annular body 13 is fitted over the body of the tube 2 and fixed. Further, similarly, the joining bolt 42 is installed over the mounting seat 43 of the two annular bodies 12 and 13. And FIG.
As shown by the imaginary line at, the flanged nut so that the annular bodies 12 and 13 can apply force in the direction away from each other
Set 46 and operate.

When the disassembly of the tubes 1 and 2 is completed, the annular bodies 12 and 13 are removed from the tube 2 in the same manner.

[0034]

As described above, according to the present invention, the annular bodies are fixed to the outer circumferences of the ends of one and the other pipes which are joined to each other in an fitted state, and these annular bodies are brought closer to each other. Means are provided, a V-belt groove is formed on the inner periphery of each annular body, and a V-belt is fitted into this V-belt groove, and when the annular body is fixed to the outer periphery of the end of the pipe in an externally fitted state, Since the rear surface of the V-belt is configured to be in contact with the outer surface of the pipe, the annular body can be fixed to the outer circumference of the pipe in a state where the rear surface having a large surface area of the V-belt is in contact with the outer circumference of the pipe,
For this reason, the annular body and the pipe can be securely fixed, so that it is possible to prevent the occurrence of slippage in the pipe axis direction when the annular bodies are brought close to each other by the access means, and formed on the inner periphery of the annular body. In the state where the V-belt is fitted in the V-belt groove, the joining force can be easily applied to each pipe simply by fitting the annular body to the outer periphery of the end of the pipe.
In addition, since the center of the arc forming the bottom surface of the V-belt groove is provided at a distance from the center of the arc forming the inner periphery of each main body, both ends of the V-belt accommodated in each main body are formed. Because it is configured to be wider than the other parts, when the main body containing the V-belt is put on the pipe, the inner peripheral part protruding from the V-belt groove at both ends of this V-belt is prevented from hitting the pipe. And therefore work very easily.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which a joining device according to the present invention is fitted to the outer periphery of a pipe by fitting.

FIG. 2 is an enlarged detailed view of a fastening portion in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is an enlarged detailed view of a mounting seat in FIG. 1;

FIG. 5 is a sectional view taken along line VV in FIG. 4;

FIG. 6 is a view showing a state in which joining bolts are arranged over mounting seats.

FIG. 7 is a sectional view showing a V-belt groove of an annular body.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a diagram for explaining a joining operation between pipes.

FIG. 10 is a view for explaining a dismantling operation of pipes.

[Explanation of symbols]

 1 Pipe 2 Pipe 12 Annular Body 13 Annular Body 22 Tightening Bolt 28 Stepped Collar 42 Joint Bolt 51 V Belt Groove 52 V Belt 53 Back

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Takashi Yokomizo 2-26-2 Ohama-cho, Amagasaki-shi, Hyogo Pref. Kubota Mukogawa Works Co., Ltd. (56) Reference literature -55594 (JP, Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16L 19/03

Claims (1)

(57) [Claims] 1. A respective annular body on the outer periphery of an end portion of the one and the other tube is joined and fixed outside fit with each other, a means to approach these annular body to each other to each other, each ring
The body is divided into two parts in the circumferential direction and has a pair of main bodies.
And, the inner periphery of the annular body toward the inner peripheral side from the groove bottom Nitsu
The V-belt groove formed so that the groove width gradually widens
When the V-belt is fitted into this V-belt groove, and the annular body is fixed to the outer periphery of the end of the pipe in an externally fitted state,
The rear surface of this V-belt is configured to contact the outer surface of the pipe ,
The center of the arc that forms the bottom surface of the V-belt groove is
Provided at a distance from the center of the arc that forms the inner circumference
As a result, both ends of the V-belt accommodated in each body are
A pipe joining device characterized in that it is configured to be wider than other portions .