JPH07111227B2 - Clamp type pipe connection 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 clamp type pipe connecting device for rapidly connecting / disconnecting a fluid receiving pipe of a tanker and a connecting pipe of a loading arm.

[0002]

2. Description of the Related Art Generally, as a clamp type pipe connecting device for connecting one pipe having a supporting flange at the pipe end and the other pipe having a supporting flange at the pipe end, Japanese Patent Publication No. 54-215.
The one shown in Japanese Patent No. 63 and the one shown in FIGS. 11 and 12 are known.

The clamp type pipe connecting device 101 shown in the drawing is
One pipe 102 provided with a support flange 102A at the pipe end
And the other pipe 10 having a connecting flange 103A at the pipe end.
3 is tightened and released. A plurality of clamp mechanisms 104 arranged in a circumferential shape surrounding the other pipe 103 are fixedly installed on the outer peripheral portion of the other pipe 103 so as to operate.

In each clamp mechanism 104, a support member 105 is fixed to the outer peripheral portion of the tube end of the other tube 103. The drive screw 106 is rotatably supported by the support member 105.

A tightening screw 107 is engaged with the drive screw 106 so as to be movable in the axial direction of the tube 103. Tightening screw 1
07 slides in the hole 105A of the support member 105.

A clamp lever 108 is integrally provided on the front end side of the tightening screw 107. The clamp lever 108 is located on the front end side of the support member 105 and is a flange pressing member that can be brought into and out of contact with the support flange 102A of one of the pipes 102. Part 108
It has A at one end.

Therefore, the head portion 106A of the drive screw 106
When the screw lever 106 is rotated, the driving screw 106 linearly moves in the axial direction of the other tube 103, which causes the clamp lever 10 to move.
8 moves in the axial direction, and the operation for releasing the tightening of both tubes 102, 103 is performed.

However, in this state, the clamp lever 108 interferes with the operation of one pipe 102 to the other pipe 1.
It cannot be separated from 03. Therefore, the pipe 102,
After the tightening of 103, the clamp lever 108 is manually swung from the inside to the outside while being held by hand (see FIG. 11).
Is changed from the solid line to the dotted line state) and the clamp lever 108 is held by hand, thereby
Can be separated from the other tube 103.

Further, when the pipes 102 and 103 are fastened, they are operated in the reverse order of the above-mentioned fastening release.

[0010]

However, in the above-mentioned clamp type pipe connecting device 101, both pipes 102, 1 are provided.
03 tightening and releasing operation, clamp lever 10
Although it is necessary to perform an axial linear movement operation and a swinging movement of the other tube 103 of No. 8, the rotational movement of the drive screw 106 alone causes the clamp lever 108 to swing, and the swinging state is maintained. However, it was difficult to manually swing the clamp lever 108 from the inside to the outside or from the outside to the inside when swinging the clamp lever 108.
That is, it was difficult to automate the operation of the clamp lever 108 with a single drive means.

The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a driving means having a single function.
(EN) Provided is a clamp-type pipe connecting device capable of linearly moving a clamp lever along its axial direction and automatically swinging the clamp lever in and out and holding it.

[0012]

The invention according to claim 1 is
In a clamp type pipe connecting device for connecting one pipe and the other pipe having a support flange at the pipe end, a supporting member fixed to the outer peripheral portion of the pipe end of the other pipe and rotatably supported by the supporting member Connected to the front end of the tightening screw, which is provided on the supporting member, is rotated by the driving screw, is rotated by the driving screw, is screwed into the driving screw, and is movable in the axial direction of the pipe. Is located on the front end side of the supporting member and has a flange pressing portion at one end that can be brought into and out of contact with the supporting flange of one of the pipes, and the clamp lever and the screw surface of the drive screw are pressed against each other. A screw surface contacting means for preventing the rotation of the tightening screw from being formed on the support member and the rotation preventing part on the tightening screw. One tube support hula When the clamp lever is rotated to a position where it can be tightened from the position that is disengaged from the operation conversion part at the time of releasing the clamp and the support flange of one of the pipes when the clamp lever is rotated to a position outside the It is characterized in that an operation converting portion at the time of tightening for stopping the rotation of the clamp lever is formed.

According to a second aspect of the present invention, in a clamp type pipe connecting device for connecting one pipe and the other pipe having a supporting flange at the pipe end, the clamp type pipe connecting device is fixed to the outer peripheral portion of the pipe end of the other pipe. A support member, a drive screw rotatably supported by the support member, a rotation drive means provided on the support member for rotating the drive screw, and a fastening screwed to the drive screw and movable in the axial direction of the pipe. A screw, a clamp lever connected to the front end of the tightening screw and arranged on the front end side of the support member, and having at one end a flange pressing portion that can be brought into and out of contact with the support flange of one pipe, and the screw of the tightening screw Surface and the screw surface contact means for pressing the screw surface of the drive screw against each other, and when the clamp lever is rotated from the clampable position to the position deviating from the support flange of one pipe, the rotation of the clamp lever is stopped. Is the operation conversion part when releasing the tightening The first stopper is provided on the support member or the other pipe, and when the clamp lever is rotated from the position deviating from the support flange of the one pipe to the tightenable position, the rotation of the clamp lever is stopped. It is characterized in that the second stopper formed of the operation converting portion is provided on the support member or the other tube.

[0014]

According to the first aspect of the present invention, the operation of the clamp lever performs two operations, that is, a tightening releasing operation for releasing the tightening of both tubes and a tightening operation for tightening both tubes.

An initial state is set in which the clamp lever is in a position where the clamp lever is swung inward, and the support flange of one tube is pressed against the other tube to be tightened. After both pipes have been used, when the drive screw is rotated in the predetermined direction by the rotation drive means, the tightening screw is slightly removed from the supporting flange by the clamp lever for a short time while the tightening force of the clamp lever is slightly weakened. Move slightly away.

Next, since a frictional force is applied between the tightening screw and the driving screw by the screw surface contact means, the tightening screw rotates together with the driving screw, and the clamp lever is rotated by the rotation of the tightening screw. Rotates to the position where it swings outward.

When the tightening screw rotates by a predetermined angle, the rotation preventing part of the tightening screw and the stopper of the supporting member abut at the operation converting part at the time of releasing the tightening, and the tightening screw rotates (rotation of the clamp lever). To stop. Further, the posture of the clamp lever after being rotated is maintained by the frictional force applied by the screw surface contact means between the tightening screw and the driving screw.

At this time, a frictional force acts between the tightening screw and the drive screw by the screw surface contact means, but the rotational force of the rotary drive means overcomes this frictional force and the rotation of the drive screw continues.

As described above, since the tightening screw has stopped rotating, the rotation of the drive screw causes the screw to move from the other pipe to the one pipe in the axial direction. As a result, the flange pressing portion of the clamp lever is separated from the supporting flange of the one tube. That is, the connection between the two pipes is unfastened.

On the other hand, when the drive screw is rotated in the opposite direction by the rotation drive means, a frictional force is applied between the tightening screw and the drive screw by the screw surface contact means, so that the tightening screw is It rotates with the drive screw, and the clamp lever located on the outer side also rotates with it, so that the clamp lever is swung inward. When the tightening screw rotates by a predetermined angle, the rotation blocking portion of the tightening screw and the stopper of the support member come into contact with each other in the operation converting portion at the time of tightening, and the tightening screw rotates (rotation of the clamp lever).
To stop.

At this time, a frictional force is applied between the tightening screw and the driving screw by the screw surface contact means, but the frictional force overcomes the rotational force of the rotary driving means and the rotation of the driving screw continues.

Since the tightening screw has stopped rotating, the rotation of the drive screw causes the screw to move in the axial direction from one tube toward the other tube. As a result, the flange pressing portion of the clamp lever comes into contact with the support flange of one pipe, and the support flange of one pipe is fastened to the other pipe.

According to the invention of claim 2, claim 1
The same operation as the described invention occurs.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 show a clamp type pipe connecting device according to an embodiment of the present invention.

In the figure, 1 is one tube to be connected,
An annular support flange 1A is formed at the pipe end. Reference numeral 2 is the other pipe to be connected, and an annular connecting flange 2A is formed at the pipe end. The support flange 1A of the one pipe 1 and the connecting flange 2A of the other pipe 2 are in contact with each other in a state of facing each other.

A support member 4 made of a disk-shaped block is provided on the outer peripheral portion of the connection flange 2A. That is, the support member 4 has a front disc body 5 and a rear disc body 6, and the front disc body 5 is in a state where its front end face is brought into contact with the back side of the connection flange 2A of the other pipe 2. ,
It is attached to the connecting flange 2A with a plurality of bolts. The rear disc body 6 is fixedly attached to the front disc body 5 with a plurality of bolts. This support member 4
As described in detail below, the four clamp mechanisms 8, 8,
8, 8 are provided along the circumferential direction.

Since each of the clamp mechanisms 8 has the same structure, only one of them will be described as an example. In the clamp mechanism 8, the support member 4 is provided with a front bearing 9 and a rear bearing 10, and a drive screw 11 is supported by the front bearing 9 and the rear bearing 10. That is, the drive screw 11 is rotatably supported by the support member 4.

The drive screw 11 has a cylindrical shape,
A tightening screw 12 is screwed into the drive screw 11.
Further, a small gear 13 is provided on the outer peripheral portion of the drive screw 11 for the key 1.
The small gear 13 is fixedly provided via 3A, and meshes with a large gear 14 rotatably provided around the inner peripheral portion of the front disc body 5. Therefore, as shown in FIG. 8, the small gear 13 is arranged in four places around the large gear 14 (only one place is shown).

A first transmission gear 15 is meshed with a predetermined portion of the large gear 14, and the first transmission gear 15 is provided on a shaft 16 pivotally mounted on the support member 4, and on the shaft 16. The second transmission gear 16A is provided. The second transmission gear 16A is a rotation driving means 1 including an air motor fixedly attached to the support member 4 via the third transmission gear 17.
8 is in mesh.

Then, at the front end of the tightening screw 12,
A two-pronged connecting portion 20 composed of two facing plate portions 19 and 19 is formed, and a clamp lever 21 is sandwiched between the connecting portions 20, and the plate portions 19 and 19 of the connecting portion 20 and the clamp lever 21 are arranged. The clamp lever 21 is coupled via a support pin 22 and is rotatably connected to one end of the tightening screw 12, and is disposed on the front end side of the support member 4.

The clamp lever 21 is made of a plate material,
A flange pressing portion 23 is provided at one end of the supporting flange 1A of the one tube 1 so as to be freely contactable with and separable from the supporting flange 1A, and elastic means 24 is provided at another end.
Is provided. The elastic means 24 is the clamp lever 2
Pin 25 penetrating the mounting plate portion 21A formed at the other end of 1
And a support member 4 integrally provided at one end of the pin 25.
Of the pusher 26 that presses the end face 7 of the plate, the disc spring 27 mounted between the pusher 26 and the mounting plate portion 21A, and the pin 25.
Of the nut members 28, 28 for screwing the other end of the.

A collar 29 is integrally screwed to the outer peripheral surface of the rear end of the drive screw 11. A disc 30 is screwed into the middle of the tightening screw 12 adjacent to the collar 29, and a bolt member 31 is screwed to the collar 29 by penetrating the disc 30.
A disc spring 32 is mounted between the head 31A of the disk and the end surface of the disk 30. The urging force of the disc spring 32 causes the bolt member 31 to exert a force that causes the driving screw 11 to approach the collar 29 and the disk 30, which are integral with each other, so that the screw surface of the tightening screw 12 and the screw surface of the driving screw 11 are mutually moved. Is pressed against.
That is, the screw surface contacting means 33 for pressing the screw surface of the tightening screw 12 and the screw surface of the drive screw 11 against each other is composed of the disc 30, the bolt member 31, and the disc spring 32.

A cylindrical body 34 is fixedly attached to the rear end surface of the rear disk body 6 of the support member 4, and a stopper 35 composed of a protrusion is provided in the cylindrical body 34.

On the other hand, as shown in FIGS. 2 and 3, a rotation preventing portion 36 is fixedly provided at the rear end of the tightening screw 12. The rotation blocking portion 36 is formed by forming a cam groove 36A on a part of the outer peripheral surface of the small ring body, and the stopper 35 is located between the cam grooves 36A.

One end of the cam groove 36A of the rotation block 36 is
It becomes the operation conversion part 37 at the time of unclamping, and the operation conversion part 38 at the time of tightening at the other end. When the tightening screw 12 is rotated, the unlocking operation converting portion 37 and the tightening operation converting portion 38 of the rotation blocking portion 36 integrated with the tightening screw 12 come into contact with the stopper 35, and the stopper 35 contacts. By the contact, the rotation of the tightening screw 12 is stopped. More specifically, the contact between the stopper 35 and the rotation-blocking portion 36 between the operation-converting portions 37 at the time of releasing the clamp causes the clamp lever 21 to rotate from the clampable position to the position deviated from the support flange 1A of the one tube 1. At this time, the rotation of the clamp lever 21 is stopped.

Further, due to the contact between the stopper 35 and the rotation preventing portion 36 during the tightening operation converting portion 38, the clamp lever 21 is rotated from the position deviated from the support flange 1A of the one pipe 1 to the tightenable position. At this time, the rotation of the clamp lever 21 is stopped.

In FIG. 5, reference numerals 1C and 1D represent buffer members. Next, the operation of this embodiment will be described. By the operation of the clamp lever 21, two operations are performed, that is, a tightening releasing operation for releasing the tightening of the tubes 1 and 2 and a tightening operation for tightening the tubes 1, 2.

The clamp lever 21 is in a position in which the clamp lever 21 swings inward, and the support flange 1A of one tube 1 is connected to the other tube 2
The state in which the connecting flange 2A is pressed and tightened is referred to as an initial state. After the two pipes 1 and 2 have been put into use, when the drive screw 11 is rotated in a predetermined direction by the rotation drive means 18, the tightening screw 12 is not moved until the tightening force of the clamp lever 21 is slightly weakened. The clamp lever 21 slightly moves in the direction away from the support flange 1A.

Further, when the driving screw 11 is rotated in a predetermined direction by the rotation driving means 18, a frictional force acts between the tightening screw 12 and the driving screw 11 by the screw surface contacting means 33. The tightening screw 12 rotates together with the drive screw 11, and the rotation of the tightening screw 12 causes the clamp lever 21 to rotate.
Rotates to the position where it swings outward (shown by the chain double-dashed line in FIG. 5).

When the clamp lever 21 rotates by a predetermined angle, the clamp lever 21 comes into contact with the cushioning member 1C to absorb the impact force, and then the rotation blocking portion 36 of the tightening screw 12 and
The stopper 35 of the support member 4 and the operation converting portion 3 when the tightening is released
7, the rotation of the tightening screw 12 (rotation of the clamp lever 21) is stopped. The rotation angle of the clamp lever 21 is about 90 degrees.

At this time, a frictional force is applied between the tightening screw 12 and the drive screw 11 by the screw surface contact means 33. The rotational force of the rotary drive means 18 overcomes this frictional force, and the drive screw 11 is driven. Continues to rotate. Since the tightening screw 12 is stopped from rotating, the rotation of the driving screw 11 moves the other screw 2 from the other pipe 2 toward the one pipe 1 along the axial direction. As a result, the flange pressing portion 23 of the clamp lever 21 is separated from the support flange 1A of the one tube 1. That is, the connection between the two pipes 1 and 2 is released.

On the other hand, when the drive screw 11 is rotated in the opposite direction by the rotation drive means 18, a frictional force acts between the tightening screw 12 and the drive screw 11 by the screw surface contact means 33. The tightening screw 12 co-rotates with the drive screw 11, and the clamp lever 21 located on the outer side also co-rotates to a position where it is swung inward. When the tightening screw 12 rotates by a predetermined angle, the clamp lever 21 comes into contact with the cushioning member 1D to absorb the impact force, and then the rotation preventing portion 36 of the tightening screw 12 and the stopper 35 of the support member 4 are separated from each other. The tightening operation conversion portion 38 comes into contact with the operation portion 38 to stop the rotation of the tightening screw 12 (rotation of the clamp lever 21).

At this time, a frictional force is applied between the tightening screw 12 and the drive screw 11 by the screw surface contact means 33. The frictional force overcomes the rotational force of the rotary drive means 18 to drive the screw 11. Continues to rotate. Since the tightening screw 12 is stopped in rotation, the rotation of the drive screw 11 causes the one screw 1 to move toward the other pipe 2 in the axial direction. As a result, the flange pressing portion 23 of the clamp lever 21 abuts the support flange 1A of the one pipe 1, and the support flange 1A of the one pipe 1 connects with the connecting flange 2 of the other pipe 2.
It is tightened to A, and it becomes the initial state.

According to the above construction, the screw surface contacting means 33 presses the screw surface of the tightening screw 12 and the screw surface of the drive screw 11 against each other, so that the screw surface of the tightening screw 12 and the drive screw 11 are separated from each other. Since the frictional force between the screw surfaces can be increased and the tightening screw 12 can be rotated together with the drive screw 11 by this frictional force, the clamp lever 2 can be rotated by the rotational force of the rotary drive means 18.
1 can be swung.

Further, the rotation preventing portion 36 of the tightening screw 12 and the stopper 35 of the supporting member are brought into contact with each other at the operation-converting portion 37 at the time of releasing the tightening and the operation converting portion 38 at the time of tightening-tightening screw 1
It is possible to stop the rotation of 2 and automatically convert the rotation of the tightening screw 12 into the linear movement (from the rotation of the clamp lever 21 to the linear movement).

Further, the rotation of the drive screw 11 by the rotation drive means 18 causes the tightening screw 12 to move linearly in the axial direction of the other tube 2 to move the clamp lever 21 in the axial direction. it can.

Therefore, the swinging operation of the clamp lever 21 can be performed only by the rotation driving means 18 having a single rotation function.
Conversion operation from rotation of clamp screw 12 to linear movement (rotation of clamp lever 21 to linear movement), clamp lever 2
It is possible to perform three operations of linear motion along the axial direction of 1, and it is possible to achieve the automation of the operation of tightening and releasing the tubes 1 and 2 by the clamp lever 21.

Although the connecting flange 2A is formed on the other pipe 2 in the present embodiment, the present invention can be applied to a straight pipe without the connecting flange 2A.
Further, in the present embodiment, the number of clamp mechanisms is four, but the number is not limited to this.

Further, in this embodiment, the tightening screw 1
When the rotation preventing portion 36 is fixedly provided at the rear end of the rotation stopper 2, and the tightening screw 12 is rotated, the rotation preventing portion 36 integrated with the tightening screw 12 is released when the operation converting portion 37 and when the rotation preventing portion 36 is tightened. The operation converting portion 38 contacts the stopper 35, and the stopper 3
5, the rotation of the tightening screw 12 is stopped, but the mode of stopping the rotation of the tightening screw 12 is not limited to this. For example, when the clamp lever 21 moves from the tightenable position to The first stopper, which is an operation converting portion at the time of unclamping, which stops the rotation of the clamp lever 21 when the pipe 1 is rotated to a position outside the support flange 1A, is provided on the support member 4 or the other pipe 2. , A second stopper composed of a tightening operation conversion portion that stops the rotation of the clamp lever 21 when the clamp lever 21 rotates from the position deviated from the support flange 1A of the one pipe 1 to the tightenable position. It can also be provided on the member 4 or the other tube 2.

In addition to the above, as a mode of stopping the rotation of the tightening screw 12, there is one shown in FIG. That is, the tightening screw 12 has a rotation blocking portion 4 protruding from the outer peripheral surface of the disk 39.
A pair of fixed stoppers 41 and 42 that form 0 and stop the rotation of the tightening screw 12 are provided on the support member 4, and the fixed stopper 41 is provided with the support flange 1A of the one pipe 1 from the position where the clamp lever 21 can be tightened. When the clamp lever 21 is rotated to a more distant position, a clamp release operation converting portion that stops the rotation of the clamp lever 21 is formed, and the clamp stopper 21 is provided on the fixed stopper 42 from a position deviated from the support flange 1A of the one tube 1. Clamp lever 2 when is rotated to the tightenable position
It is possible to form a tightening operation conversion portion that stops the rotation of 1.

Further, in this embodiment, the elastic means 24 is provided at the other end of the clamp lever 21, but as shown in FIG. 10, the elastic means 24 may be omitted, or Elastic means may be attached to the end surface 7 side of the support member 4.

[0052]

As described above, according to the present invention,
The screw surface contact means presses the screw surface of the tightening screw and the screw surface of the drive screw against each other, increasing the frictional force between the screw surface of the tightening screw and the screw surface of the drive screw, and tightening with this frictional force. Since the attached screw can be rotated together with the drive screw, the clamp lever can be swung by the rotational force of the rotation drive means.

Further, the rotation preventing portion of the tightening screw and the stopper of the supporting member are brought into contact with each other at the operation-converting portion at the time of releasing the tightening and the operation converting portion at the time of tightening to stop the rotation of the tightening screw, and after swinging. It is possible to automatically perform the conversion from the rotation of the tightening screw to the linear motion (from the rotation of the clamp lever to the linear motion) while maintaining the posture.

Further, the clamp screw can be moved along the axial direction by linearly moving the tightening screw in the axial direction of the tube by the rotation of the drive screw by the rotary drive means.

Therefore, with the driving means having only the single rotation function, the swinging operation of the clamp lever, the conversion operation from the rotation of the tightening screw to the linear movement (the rotation of the clamp lever to the linear movement), the clamping It is possible to perform three operations of linear movement along the axial direction of the lever, and it is possible to achieve the automation of the operation of tightening and releasing the two tubes by the clamp lever.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a clamp type pipe connecting device according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a P part in FIG.

FIG. 3 is a front view of a rotation blocking unit of FIG.

FIG. 4 is an enlarged view of a Q portion of FIG.

FIG. 5 is a front view of the clamp type pipe connecting device.

FIG. 6 is an enlarged view of an R portion in FIGS. 1 and 2.

FIG. 7 is a cross-sectional view related to the X cross section of FIG. 1 and showing a connected state of the clamp lever and the tightening screw.

8 is a front view showing a rotation path from the rotation drive means to the drive screw in FIG.

FIG. 9 is an explanatory view showing another method of stopping the tightening screw of the clamp type pipe connecting device according to the embodiment of the present invention.

FIG. 10 is a cross-sectional view showing a modified example of the clamp lever of the clamp type pipe connecting device according to the embodiment of the present invention.

FIG. 11 is a perspective view of a conventional clamp type pipe connecting device.

FIG. 12 is a cross-sectional view showing the main parts of the clamp type pipe connecting device.

[Explanation of symbols]

 1 One Pipe 1A Support Flange 2 Other Pipe 4 Support Member 11 Drive Screw 12 Tightening Screw 18 Rotation Driving Means 21 Clamp Lever 23 Flange Pressing Part 33 Screw Face Adhering Means 35 Stopper 36 Rotation Blocking 37 Operation Conversion at Tightening Release Part 38 Operation conversion part during tightening

Claims (2)

[Claims] 1. A clamp type pipe connecting device for connecting one pipe to another pipe having a support flange at a pipe end, the support member fixed to an outer peripheral portion of the pipe end of the other pipe, and the support member. Drive screw that is rotatably supported by the drive member, rotation drive means that is provided on the support member and that rotates the drive screw, tightening screw that is screwed into the drive screw and is movable in the axial direction of the pipe, and tightening screw Clamp lever that is connected to the front end of the support member and is arranged on the front end side of the support member, and that has a flange pressing part that can be brought into and out of contact with the support flange of one pipe at one end, the screw surface of the tightening screw, and the screw of the drive screw. A screw surface contacting means for pressing the surfaces against each other is provided, a rotation blocking portion is formed on the tightening screw, and a stopper for stopping the rotation of the tightening screw is provided on the supporting member, and the clamp lever is provided on the rotation blocking portion or the stopper. From the tightenable position The operation conversion part at the time of unclamping that stops the rotation of the clamp lever when it is rotated to a position outside the support flange of one pipe, and the clamp lever can be tightened from the position outside the support flange of one pipe A clamp-type pipe connecting device characterized in that an operation converting portion at the time of tightening is formed so as to stop the rotation of the clamp lever when it is rotated to the front. 2. A clamp type pipe connecting device for connecting one pipe to another pipe having a support flange at a pipe end, the support member fixed to an outer peripheral portion of the pipe end of the other pipe, and the support member. Drive screw that is rotatably supported by the drive member, rotation drive means that is provided on the support member and that rotates the drive screw, tightening screw that is screwed into the drive screw and is movable in the axial direction of the pipe, and tightening screw Clamp lever that is connected to the front end of the support member and is arranged on the front end side of the support member, and that has a flange pressing part that can be brought into and out of contact with the support flange of one pipe at one end, the screw surface of the tightening screw, and the screw of the drive screw. Equipped with a screw surface contacting device that presses the surfaces against each other, and operates when releasing the clamp lever that stops the rotation of the clamp lever when the clamp lever rotates from the clampable position to a position outside the support flange of one pipe. The first stock consisting of the converter Is provided on the support member or the other pipe, and when the clamp lever is rotated from the position deviated from the support flange of the one pipe to the tightenable position, the rotation of the clamp lever is stopped. The clamp type pipe connecting device, wherein the second stopper is provided on the support member or the other pipe.