JP7602966B2 - Clamping Tool - Google Patents

Description

The present invention relates to a clamping device, specifically to a clamping device used when attaching a branch pipe to a pipe.

Conventionally, clamps have been used when attaching a plastic branch joint to a gas pipe. In Patent Document 1, the saddle portion of the branch joint is supported by an upper clamp, the gas pipe is supported by a lower clamp, and the upper and lower clamps are connected to support the branch joint to the gas pipe.

JP 2018-54071 A

By the way, in order to drain water from the gas pipe, a branch pipe for collecting water may be attached to the gas pipe. When the diameter of the gas pipe is relatively large, it may be difficult to attach an existing branch pipe for collecting water, and it is necessary to devise a new water-removal structure and a new jig for attaching the branch pipe for collecting water.

Patent Document 1 discloses a clamp for attaching only one saddle portion with a branch pipe, but it is not possible to hold a pair of saddles above and below the gas pipe at the same time. To attach two saddles, one must be attached first, and then the other, which means the work must be carried out twice.

The present invention was made in consideration of the above, and aims to provide a clamping device that allows two branch pipes to be installed in a pipe with simple operations.

The clamping device according to claim 1 is a clamping device that holds an upper saddle and a lower saddle, each having a saddle body and a branch pipe provided on the saddle body, in a state in which they are arranged facing each other along the outer periphery of a pipe, and includes a first clamping body having a first upper support part that abuts from above in the vertical direction against an upper flange provided on one side of the upper saddle across the branch pipe, a first lower support part that abuts from below in the vertical direction against a lower flange provided on one side of the lower saddle across the branch pipe, and a first fastening mechanism that presses the upper saddle and the lower saddle against the outer periphery of the pipe by narrowing the gap between the first upper support part and the first lower support part, The second clamp body has a second upper support part that contacts the other upper flange provided on the opposite side of the one-side upper flange across the branch pipe of the upper saddle from above in the vertical direction, a second lower support part that contacts the other lower flange provided on the opposite side of the one-side lower flange across the branch pipe of the lower saddle from below in the vertical direction, and a second fastening mechanism that presses the upper saddle and the lower saddle against the outer circumferential surface of the piping by narrowing the gap between the second upper support part and the second lower support part, and a common fastening member that is connected to the first fastening mechanism and the second fastening mechanism and operates both the first fastening mechanism and the second fastening mechanism by a common operation.

The clamping device according to claim 1 holds an upper saddle and a lower saddle, each having a saddle body and a branch pipe attached to the saddle body, in a state in which they are arranged facing each other along the outer periphery of a pipe, and is provided with a first clamping body and a second clamping body.

The first clamp body has a first upper support part, a first lower support part, and a first fastening mechanism. The first upper support part abuts against one side of the upper saddle's upper flange from above in the vertical direction, and the first lower support part abuts against one side of the lower saddle's lower flange from below in the vertical direction. The first fastening mechanism presses the upper saddle and the lower saddle against the outer peripheral surface of the pipe by narrowing the gap between the first upper support part and the first lower support part.

On the other hand, the second clamp body has a second upper support part, a second lower support part, and a second fastening mechanism. The second upper support part abuts against the other side upper flange from above in the vertical direction. The other side upper flange is disposed on the opposite side of the one side upper flange across the branch pipe of the upper saddle. The second lower support part abuts against the other side lower flange of the lower saddle from below in the vertical direction. The other side lower flange is disposed on the opposite side of the one side lower flange across the branch pipe of the lower saddle. The second fastening mechanism narrows the gap between the second upper support part and the second lower support part to press the upper saddle and the lower saddle against the outer peripheral surface of the piping.

In this way, by placing the first clamp body and the second clamp body on one side and the other side of the branch pipe and pressing the upper saddle and the lower saddle against the outer periphery of the pipe, the two saddles can be held to the pipe at the same time. This makes it possible to install two branch pipes on the pipe with simple work.

In addition, by operating the common fastening member, both the first fastening mechanism and the second fastening mechanism are operated to narrow the gap between the first upper support part and the second lower support part, and the gap between the second upper support part and the second lower support part. This makes it easier to press the two saddles against the piping in a balanced manner compared to when each is operated separately.

In the clamping device according to claim 1 , the first fastening mechanism includes a first main body member having a first lower fixing portion fixed to the first lower support portion and extending in a direction perpendicular to the extending direction of the first lower support portion, a first intermediate portion extending from the first lower fixing portion toward the first upper support portion and extending in a direction perpendicular to the first lower fixing portion, and a first upper fixing portion fixed to the first intermediate portion and extending in the same direction as the first lower fixing portion, disposed on the opposite side of the first lower support portion with the first upper support portion in between, and having a first through hole formed therein in the same direction as the extending direction of the first intermediate portion, and a first fastening member inserted through the first through hole and abutting against the first upper support portion, widening the gap between the first upper support portion and the first upper fixing portion; and the second fastening mechanism includes a first fastening member fixed to the second lower support portion and extending in a direction perpendicular to the extending direction of the second lower support portion. a second main body member having a second lower fixing portion extending in a direction perpendicular to the extension direction of the second lower fixing portion, a second intermediate portion extending from the second lower fixing portion toward the second upper support portion and extending in a direction perpendicular to the second lower fixing portion, and a second upper fixing portion fixed to the second intermediate portion and extending in the same direction as the second lower fixing portion, disposed on the opposite side of the second lower support portion with the second upper support portion in between, and having a second through hole formed in the same direction as the extension direction of the second intermediate portion; and a second fastening member that is inserted into the second through hole and abuts against the second upper support portion, widening the gap between the second upper support portion and the second upper fixing portion, and the common fastening member is configured to include a first gear fixed to the first fastening member, a second gear fixed to the second fastening member, and a common gear that meshes with the first gear and the second gear.

According to the clamping device of the first aspect , the common fastening member can be easily configured by using a gear.

The clamping device according to a second aspect of the present invention includes a holding plate that holds the rotation center of the first gear, the second gear, and the common gear.

According to the clamping device of claim 2 , the retaining plate holds the rotation center of the first gear, the second gear, and the common gear, thereby integrating the common fastening member and making it easier to operate the gear rotation.

The clamping device of the present invention allows two branch pipes to be installed in a pipe with simple work.

FIG. 2 is a front view (as viewed from the axial direction) of the clamp device of this embodiment, illustrating the state before the upper saddle and the lower saddle are held. FIG. 2 is a front view (viewed from the axial direction) of the clamp tool of this embodiment, showing the clamp tool placed on the upper saddle. FIG. 2 is a front view (as viewed from the axial direction) of the clamp device of this embodiment, showing the state in which the upper saddle and the lower saddle are held. 1 is a side view of the clamp device of the present embodiment as viewed from the first clamp body side, showing the state in which the upper saddle and the lower saddle are held. FIG. 1 is a side view of the clamp device of the present embodiment as viewed from the second clamp body side, showing the state in which the upper saddle and the lower saddle are held. FIG. 1 is a perspective view showing a state in which an upper saddle and a lower saddle are held by the clamping device of this embodiment. FIG. FIG. 2 is a perspective view of a common fastening member according to the present embodiment. 1A is a front view of the common fastening member of this embodiment, in which (A) shows a state in which the small diameter gear and the common gear are meshed, (B) shows a state in which the medium diameter gear and the common gear are meshed, and (C) shows a state in which the large diameter gear and the common gear are meshed. 13 is a diagram showing a jig for passing an upper saddle and a lower saddle attached to a pipe and a branch pipe with the clamping device of this embodiment. FIG. 1 is a diagram showing a state in which a water collector is attached using an upper saddle and a lower saddle attached to a pipe by the clamping device of this embodiment. FIG.

Below, an embodiment of the present invention will be described in detail with reference to the drawings. Figs. 1 to 6 show a clamping device 18 according to an embodiment of the present invention, and a branch pipe mounting structure 10 to which the clamping device 18 is attached. The clamping device 18 is used to hold an upper saddle 14 and a lower saddle 16 to a resin pipe 12. The upper saddle 14 and the lower saddle 16 are so-called EF saddles, and are fused by being pressed against the outer periphery of the pipe 12 while electricity is passed through electrical wiring (not shown).

The upper saddle 14 comprises a saddle body 14A, a branch pipe 14B, and a pair of upper flanges 14C, 14D. The saddle body 14A has an inner side (concave side) 14in shaped to conform to the outer periphery of the pipe 12, and is provided with a cylindrical branch pipe 14B protruding from the outer side (convex side) 14out. A male thread is formed on the outer periphery of the branch pipe 14B.

An upper flange 14C is provided at one end of the branch pipe 14B, and an upper flange 14D is provided at the other end. When the saddle body 14A is arranged along the outer circumferential surface of the pipe 12, the upper flanges 14C and 14D are arranged so as to extend along the axial direction S of the pipe 12 (see Figures 5 and 6). Note that "extending along the axial direction S" does not have to be continuous in the axial direction S, and includes cases where they are formed in sections. The upper flanges 14C and 14D are formed so as to protrude from the outer periphery of the pipe 12 when viewed from the axial direction S. On the outer side 14out of the upper flanges 14C and 14D, flange surfaces 14E against which the upper support surfaces 22A and 32A described later abut are formed, respectively.

The lower saddle 16 includes a saddle body 16A, a branch pipe 16B, and a pair of lower flanges 16C and 16D. The saddle body 16A has an inner side (concave side) 16in shaped to conform to the outer periphery of the pipe 12, and a cylindrical branch pipe 16B protruding from the outer side (convex side) 16out. A lower flange 16C is provided at one end of the branch pipe 16B, and a lower flange 16D is provided at the other end. The lower flanges 16C and 16D are arranged so as to extend along the axial direction S of the pipe 12 when the saddle body 16A is arranged along the outer periphery of the pipe 12. The lower flanges 16C and 16D are formed to protrude from the outer periphery of the pipe 12 when viewed from the axial direction S. The outer 16out side of the lower flanges 16C and 16D has a flange surface 16E against which the lower support surfaces 24A and 34A described later abut.

The clamping device 18 comprises a first clamping body 20, a second clamping body 30, and a common fastening member 40, all of which are substantially identical in shape.

The first clamp body 20 has a first upper support portion 22, a first lower support portion 24, a first body member 26, and a first fastening member 28. The first body member 26 is U-shaped and has a first intermediate portion 26A, a first lower fixing portion 26B, and a first upper fixing portion 26C. The first intermediate portion 26A constitutes the middle part of the U-shape. The first lower fixing portion 26B is bent at a right angle from one end side of the first intermediate portion 26A to constitute one end of the U-shape. The first upper fixing portion 26C is bent at a right angle from the other end side of the first intermediate portion 26A to constitute the other end of the U-shape. The first upper fixing portion 26C has a first through hole 26H formed in a direction parallel to the extension direction (longitudinal direction) of the first intermediate portion 26A, and a female thread is formed on the inner wall of the first through hole 26H.

The first lower support part 24 is disposed on the first lower fixed part 26B side inside the U-shape of the first main body member 26. The first lower support part 24 extends perpendicular to the first intermediate part 26A and the first lower fixed part 26B, and the center part is fixed onto the first lower fixed part 26B. The first lower support part 24 is longer than the lower flange 16C.

The first upper support part 22 is disposed at a position facing the first lower support part 24 on the inside of the U-shape of the first main body member 26. The first upper support part 22 extends perpendicular to the first intermediate part 26A and the first upper fixing part 26C, and is disposed so that its center part intersects with the first upper fixing part 26C. The first upper support part 22 is longer than the upper flange 14C. The tip of the first fastening member 28 is rotatably attached to the first upper support part 22 at a position corresponding to the first through hole 26H.

The first fastening member 28 is rod-shaped and has a male thread 28N formed on its outer periphery. A mounting corner 28A is formed on the base end side of the first fastening member 28 that is not inserted into the first through hole 26H. The mounting corner 28A is in the shape of a square prism. The first fastening member 28 is screwed into the female thread of the first through hole 26H. By rotating the first fastening member 28 in one direction, the first upper support part 22 moves in a direction approaching the first lower support part 24 while being guided by the first intermediate part 26A, and by rotating the first fastening member 28 in the opposite direction, the first upper support part 22 moves in a direction away from the first lower support part 24 while being guided by the first intermediate part 26A. The first fastening mechanism is composed of the first main body member 26 and the first fastening member 28.

The first upper support portion 22 is formed with an upper support surface 22A that abuts against the flange surface 14E of the upper flange 14C. The upper support surface 22A extends in the same direction as the extension direction of the upper flange 14C.

The first lower support portion 24 is formed with a lower support surface 24A that abuts against the flange surface 16E of the lower flange 16C. The lower support surface 24A extends in the same direction as the extension direction of the lower flange 16C.

An alignment mark 27 is provided on the side where the U-shape of the first intermediate portion 26A is visible. The alignment mark 27 marks the position where the upper support surface 22A is positioned when the upper flange 14C and the lower flange 16C are clamped between the first upper support portion 22 and the first lower support portion 24 using the upper saddle 14 and the lower saddle 16 corresponding to the diameter of the pipe 12. The alignment mark 27 is provided at a position corresponding to three types of pipe diameters.

The width of the first intermediate portion 26A is shorter than the length of the first upper support portion 22 and the first lower support portion 24 in the axial direction S, and the first upper support portion 22 and the first lower support portion 24 are visible when viewed from outside the first intermediate portion 26A.

The second clamp body 30 has the same configuration as the first clamp body 20, and has a second upper support portion 32, a second lower support portion 34, a second body member 36, and a second fastening member 38 that correspond to the first upper support portion 22, the first lower support portion 24, the first body member 26, and the first fastening member 28.

The second main body member 36 is U-shaped and has a third intermediate portion 36A, a second lower fixing portion 36B, and a second upper fixing portion 36C. The second intermediate portion 36A forms the middle portion of the U-shape. The second lower fixing portion 36B is bent at a right angle from one end side of the second intermediate portion 36A to form one end side of the U-shape. The second upper fixing portion 36C is bent at a right angle from the other end side of the second intermediate portion 36A to form the other end side of the U-shape. A second through hole 36H is formed in the second upper fixing portion 36C in a direction parallel to the second intermediate portion 36A, and a female thread is formed on the inner wall of the second through hole 36H.

The second lower support part 34 is disposed on the second lower fixed part 36B side inside the U-shape of the second main body member 36. The second lower support part 34 extends perpendicular to the second intermediate part 36A and the second lower fixed part 36B, and the center part is fixed onto the second lower fixed part 36B. The second lower support part 34 is longer than the lower flange 16D.

The second upper support portion 32 is disposed at a position facing the second lower support portion 34 on the inside of the U-shape of the second main body member 36. The second upper support portion 32 extends perpendicular to the second intermediate portion 36A and the second upper fixing portion 36C, and is disposed so that its center portion intersects with the second upper fixing portion 36C. The tip of the second fastening member 38 is rotatably attached to the second upper support portion 32 at a position corresponding to the second through hole 36H. The second fastening member 38 is rod-shaped, and a male screw 38N is formed on the outer periphery. In addition, a mounting corner portion 38A is formed on the base end side of the second fastening member 38 that is not inserted into the second through hole 36H. The mounting corner portion 38A is formed in a square prism shape. The second fastening member 38 is screwed into the female thread of the second through hole 36H. By rotating in one direction, the second upper support part 32 moves toward the second lower support part 34 while being guided by the second intermediate part 36A, and by rotating in the opposite direction, the second upper support part 32 moves away from the second lower support part 34 while being guided by the second intermediate part 36A. The second main body member 36 and the second fastening member 38 constitute a second fastening mechanism.

The second upper support portion 32 is formed with an upper support surface 32A that abuts against the flange surface 14E of the upper flange 14D. The upper support surface 32A extends in the same direction as the extension direction of the upper flange 14D.

The second lower support portion 34 is formed with a lower support surface 34A that abuts against the flange surface 16E of the lower flange 16D. The lower support surface 34A extends in the same direction as the extension direction of the lower flange 16D.

An alignment mark 37 is provided on the side where the C-shape of the second intermediate portion 36A is visible. The alignment mark 37 marks the position where the upper support surface 32A is positioned when the upper flange 14D and the lower flange 16D are clamped between the second upper support portion 32 and the second lower support portion 34 using the upper saddle 14 and the lower saddle 16 corresponding to the diameter of the pipe 12. The alignment mark 37 is provided at a position corresponding to three types of pipe diameters.

The width of the second intermediate portion 36A is shorter than the length of the second upper support portion 32 and the second lower support portion 34 in the axial direction S, and the second upper support portion 32 and the second lower support portion 34 are arranged so as to be visible when viewed from the outside of the second intermediate portion 36A.

As shown in FIG. 7, the common fastening member 40 includes a first gear portion 42, a second gear portion 52, a common gear 60, and a retaining plate 50. The retaining plate 50 is an elongated plate with a central hole 50C formed in the center that penetrates the plate. In addition, long holes 50A, 50B are formed on both sides of the central hole 50C in the longitudinal direction. The long holes 50A, 50B extend long in the same direction as the longitudinal direction of the retaining plate 50.

The first gear section 42 includes a small diameter gear 42A, a medium diameter gear 42B, and a large diameter gear 42C. The small diameter gear 42A, the medium diameter gear 42B, and the large diameter gear 42C are arranged in this order from top to bottom, with the diameters set to increase in this order, and teeth that mesh with the common gear 60 are formed on the outer periphery of each gear. The small diameter gear 42A, the medium diameter gear 42B, and the large diameter gear 42C are arranged coaxially and rotate together.

The first mounting portion 44 is fixed below the large diameter gear 42C of the first gear portion 42. The first mounting portion 44 has a circular plate 44A that holds the underside of the large diameter gear 42C, and a protrusion 44B that protrudes downward from the center of the circular plate 44. A square hole 44C that engages with the mounting corner portion 28A is formed in the protrusion 44B.

A first shaft 46 is attached to the first gear portion 42 via a bearing (not shown). The first shaft 46 is inserted into an elongated hole 50A in the holding plate 50 and is fastened to the holding plate 50 by a nut 48. The first gear portion 42 is configured to rotate around the first shaft 46 together with the first mounting portion 44.

The second gear section 52 includes a small diameter gear 52A, a medium diameter gear 52B, and a large diameter gear 52C. The small diameter gear 52A, the medium diameter gear 52B, and the large diameter gear 52C are arranged in this order from the top, and have the same diameter as the small diameter gear 42A, the medium diameter gear 42B, and the large diameter gear 42C of the first gear section 42, respectively, and have teeth formed on their outer periphery that mesh with a common gear 60 described below. The small diameter gear 52A, the medium diameter gear 52B, and the large diameter gear 52C are arranged coaxially and rotate together.

A second mounting portion 54 is fixed below the large diameter gear 52C of the second gear portion 52. The second mounting portion 54 has a circular plate 54A that holds the underside of the large diameter gear 52C, and a protrusion 54B that protrudes downward from the center of the circular plate 54A. A square hole 54C that engages with the mounting corner portion 38A is formed in the protrusion 54B.

A second shaft 56 is attached to the second gear portion 52 via a bearing (not shown). The second shaft 56 is inserted into the long hole 50B of the holding plate 50 and is fastened to the holding plate 50 by a nut 58. The second gear portion 52 is configured to rotate around the second shaft 56 together with the second mounting portion 54.

The common gear 60 is disposed between the first gear portion 42 and the second gear portion 52, and has a shaft portion 71 fixed to the center of rotation. The shaft portion 71 is inserted through the central hole 50C, and a disk-shaped handle 72 is attached to the upper end. A bearing portion 73 is provided on the upper side corresponding to the central hole 50C of the holding plate 50. The shaft portion 71 is rotatably supported by the bearing portion 73. The shaft portion 71 is also movable relative to the bearing portion 73 in the axial direction. Teeth that mesh with the gears of the first gear portion 42 and the second gear portion 52 are formed on the outer periphery of the common gear 60. As shown in Figures 8(A) to (C), the common gear 60 is positioned in a position where it meshes with the small diameter gears 42A, 52A (Figure 8(A)), a position where it meshes with the medium diameter gears 42B, 52B (Figure 8(B)), or a position where it meshes with the large diameter gears 42C, 52C (Figure 8(C)), depending on the distance between the first gear portion 42 and the second gear portion 52.

Next, we will explain the procedure for holding the upper saddle 14 and the lower saddle 16 to the pipe 12 using the clamping device 18 of this embodiment.

As shown in FIG. 2, first, the upper saddle 14 is placed on the upper side of the pipe 12, the first upper support portion 22 of the first clamp body 20 is placed on the first upper flange 14C of the upper saddle 14, and the second upper support portion 32 of the second clamp body 30 is placed on the first upper flange 14D of the upper saddle 14. This allows the first clamp body 20 and the second clamp body 30 to be temporarily placed on the pipe 12 via the upper saddle 14.

The lower saddle 16 is placed below and opposite the upper saddle 14, and the lower flange 16C of the lower saddle 16 is placed on the lower support surface 24A of the first clamp body 20, and the lower flange 16D of the lower saddle 16 is placed on the lower support surface 34A of the second clamp body 30.

At this time, the position of the upper saddle 14 is adjusted so that the first intermediate portion 26A is positioned at the center of the axial direction S of the upper flange 14C, and the second intermediate portion 36A is positioned at the center of the axial direction S of the upper flange 14D.

The position of the lower saddle 16 is adjusted so that the first intermediate portion 26A is positioned at the center of the axial direction S of the lower flange 16C, and the second intermediate portion 36A is positioned at the center of the axial direction S of the lower flange 16D. Also, check the alignment scales 27, 37 visible from the axial direction S of the pipe 12, and position the first upper support portion 22 and the second upper support portion 32 at more or less the same position relative to the mark position according to the diameter of the corresponding pipe 12.

Next, with the nuts 48 and 58 of the common fastening member 40 loosened, the mounting corner 28A is engaged with the square hole 44C, and the mounting corner 38A is engaged with the square hole 54C. The nuts 48 and 58 are then fastened to attach the first gear portion 42 and the second gear portion 52 to the retaining plate 50. This determines the distance between the first gear portion 42 and the second gear portion 52, and the common gear 60 is positioned in the axial direction according to this distance. In FIG. 2, the common gear 60 is positioned between the medium-diameter gear 42B and the medium-diameter gear 52B, and the common gear 60 is engaged with the medium-diameter gears 42B and 52B.

Next, the handle 72 of the common fastening member 40 is turned to rotate the common gear 60, and this rotational motion is transmitted to the first fastening member 28 and the second fastening member 38 via the medium diameter gears 42B and 52B. As a result, the first fastening member 28 rotates while threadedly engaging with the female thread of the first through hole 26H, bringing the first upper support portion 22 and the first lower support portion 24 closer together, while the second fastening member 38 rotates while threadedly engaging with the female thread of the second through hole 36H, bringing the second upper support portion 32 and the second lower support portion 34 closer together. As a result, the upper saddle 14 and the lower saddle 16 are temporarily held to the pipe 12.

In this state, check from the side whether the upper flange 14C of the upper saddle 14 and the lower flange 16C of the lower saddle 16, and the upper flange 14D of the upper saddle 14 and the lower flange 16D of the lower saddle 16 are arranged parallel to each other, and adjust the positions of the upper saddle 14 and the lower saddle 16 so that they are arranged parallel to each other.

After adjustment, the handle 72 is further rotated in the same direction to rotate the common gear 60, thereby rotating the first fastening member 28 and the second fastening member 38, bringing the first upper support part 22 and the first lower support part 24 closer together and bringing the second upper support part 32 and the second lower support part 34 closer together, thereby holding the upper saddle 14 and the lower saddle 16 in a pressed state against the pipe 12. At this time, check the alignment scales 27, 37 and make sure that the first upper support part 22 and the second upper support part 32 are positioned at the specified pipe diameter position relative to the mark position corresponding to the diameter of the corresponding pipe 12 (see Figure 3).

Then, electricity is passed through the upper saddle 14 and the lower saddle 16 to heat them and fuse them to the pipe 12. This allows the upper saddle 14 and the lower saddle 16 to be fixed to the pipe 12 while being aligned so that the axes of the branch pipes 14B and 16B are coaxial.

After the upper saddle 14 and the lower saddle 16 are fused to the pipe 12, the handle 72 of the common fastening member 40 is rotated in the opposite direction to loosen the first fastening member 28 and the second fastening member 38, disengage the square hole 44C from the mounting corner 28A, and disengage the square hole 54C from the mounting corner 38A. Then, the clamp 18 is removed from the upper saddle 14 and the lower saddle 16.

Then, the jig 60 is used to drill holes in the pipe 12. As shown in FIG. 9, the jig 60 has a shaft portion 66, a cutter portion 62, and a holding portion 64. The shaft portion 66 is cylindrical and has a cylindrical cutter portion 62 attached to its tip. The holding portion 64 has a screw-in portion 64A that can engage with the outer periphery of the branch pipe 14B, and an insertion portion 64B through which the shaft portion 66 is inserted. The shaft portion 66 is inserted into the insertion portion 64B, and the cutter portion 62 is disposed on the screw-in portion 64A side of the holding portion 64.

When drilling using the jig 60, the holding portion 64 is screwed onto the outer circumference of the branch pipe 14B, and the cutter portion 62 is moved downward while rotating the shaft portion 66, drilling the upper portion of the pipe 12 and forming hole H1. After drilling, the pieces cut during drilling are removed from inside the shaft portion 66 of the jig 60. Then, the shaft portion 66 is rotated again while moving the cutter portion 62 downward, drilling the portion of the lower wall of the pipe 12 that corresponds to the branch pipe 16B and forming hole H2 (see Figure 10).

In this embodiment, the axis of the branch pipe 14B of the upper saddle 14 and the axis of the branch pipe 16B of the lower saddle 16 are aligned so that they are coaxial, so that the jig 60 can be used to properly drill holes in the wall of the piping 12 corresponding to the branch pipe 14B and the branch pipe 16B.

After drilling, a cover 15 is attached to the branch pipe 14B to close the opening, and the drain pipe 70 shown in FIG. 10 is connected to the branch pipe 16B. The drain pipe 70 may be connected to the branch pipe 16B in advance before the lower saddle 16 is attached to the piping 12.

By using the clamping device 18 of this embodiment, both the upper saddle 14 and the lower saddle 16 can be held simultaneously on the pipe with simple operations. This allows the two branch pipes 14B and 16B to be easily installed on the pipe 12.

In addition, when installing the clamp device 18, the first fastening member 28 and the second fastening member 38 are rotated simultaneously in a common motion using the common fastening member 40, so the two saddles can be pressed against the piping in a more balanced manner than when they are rotated separately.

In addition, the clamping device 18 of this embodiment can be connected to the first clamp body 20 and the second clamp body 30 at a position where the distance between the first gear portion 42 and the second gear portion 52 is adjusted, and since it has gears with multiple outer diameter sizes, it can also be used for pipes with different diameters.

In addition, in the present embodiment, the common fastening member 40 holds the rotation centers of the first gear portion 42, the second gear portion 52, and the common gear 60 in the holding plate 50, making it easier to operate the gear rotation.

In this embodiment, the common fastening member 40 is configured using the first gear portion 42, the second gear portion 52, and the common gear 60, but it may be configured using other mechanisms, such as a combination of a chain and a sprocket, or a combination of a timing belt and a pulley, so that the first fastening member 28 and the second fastening member 38 are operated in a common manner.

14 Upper saddle 14A Saddle body 14B Branch pipe 14C Upper flange 14D Upper flange 16 Lower saddle 16A Saddle body 16B Branch pipe 16C Lower flange 16D Lower flange 18 Clamping device 20 First clamp body 22 First upper support portion 24 First lower support portion 26 First body member 26A First intermediate portion 26B First lower fixing portion 26C First upper fixing portion 26H First through hole 28 First fastening member 30 Second clamp body 32 Second upper support portion 32A Second upper support surface 34 Second lower support portion 36 Second body member 36A Second intermediate portion 36B Second lower fixing portion 36C Second upper fixing portion 36H Second through hole 38 Second fastening member 40 Common fastening member 42 First gear portion 50 Holding plate 52 Second gear portion 60 Common gear

Claims (2)

A clamping tool that holds an upper saddle and a lower saddle, each having a saddle body and a branch pipe provided on the saddle body, in a state in which the upper saddle and the lower saddle are arranged opposite each other along an outer periphery of a pipe,
a first upper support portion that is in vertical contact with an upper flange provided on one side of the upper saddle across the branch pipe;
a first lower support portion that is in contact with a lower flange provided on one side of the lower saddle across the branch pipe from below in the vertical direction;
a first fastening mechanism that presses the upper saddle and the lower saddle against an outer circumferential surface of the pipe by narrowing a gap between the first upper support portion and the first lower support portion;
a first clamp body having a first
a second upper support portion that is in vertical contact with an upper flange provided on the opposite side of the upper saddle from the upper side in the vertical direction, the upper flange being disposed on the opposite side of the upper flange;
a second lower support portion that is in contact with a second lower flange provided on the opposite side of the first lower flange across the branch pipe of the lower saddle from a lower side in the vertical direction;
a second fastening mechanism that presses the upper saddle and the lower saddle against an outer circumferential surface of the pipe by narrowing a gap between the second upper support portion and the second lower support portion;
a second clamp body having
a common fastening member connected to the first fastening mechanism and the second fastening mechanism and configured to operate both the first fastening mechanism and the second fastening mechanism through a common operation;
Equipped with
The first fastening mechanism includes:
a first lower fixed portion fixed to the first lower support portion and extending in a direction perpendicular to an extension direction of the first lower support portion;
a first intermediate portion extending from the first lower fixed portion toward the first upper support portion and extending in a direction perpendicular to the first lower fixed portion;
a first upper fixing portion that is fixed to the first intermediate portion, extends in the same direction as the first lower fixing portion, is disposed on the opposite side of the first upper support portion from the first lower support portion, and has a first through hole formed in the same direction as the extension direction of the first intermediate portion;
a first body member having a first base;
a first fastening member that is inserted into the first through hole and abuts against the first upper support portion to widen the gap between the first upper support portion and the first upper fixing portion;
having
The second fastening mechanism includes:
a second lower fixed portion fixed to the second lower support portion and extending in a direction perpendicular to an extension direction of the second lower support portion;
a second intermediate portion extending from the second lower fixed portion toward the second upper support portion and extending in a direction perpendicular to the second lower fixed portion;
a second upper fixing portion that is fixed to the second intermediate portion, extends in the same direction as the second lower fixing portion, is disposed on the opposite side of the second lower support portion with the second upper support portion interposed therebetween, and has a second through hole formed therein in the same direction as the extension direction of the second intermediate portion;
a second body member having a
a second fastening member that is inserted into the second through hole and abuts against the second upper support portion to widen the gap between the second upper support portion and the second upper fixing portion;
having
The common fastening member includes a first gear fixed to a first fastening member, a second gear fixed to a second fastening member, and a common gear meshing with the first gear and the second gear.
Clamp tool. a holding plate that holds a rotation center of the first gear, the second gear, and the common gear;
The clamping device of claim 1 , comprising: