JPH07233629A - Clamp, pipe and joint - Google Patents

Abstract

PURPOSE:To visually position a horizontal pipe correctly and easily. CONSTITUTION:A peeping through hole 34 is provided near the center in the width direction (X direction) of a cover side hold section 32 on the cover side hold section 32 of the cover 14 of a connecting clamp 2. A worker can perform the fitting work while visually confirming a positioning mark 80a put on a horizontal pipe 80 via the peeping through hole 34. The connecting clamp 2 can be positioned against the horizontal pipe 80 correctly and easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp, a material to be held and a joint between the materials to be held, and more particularly to improvement of the positioning function of the clamp.

[0002]

2. Description of the Related Art FIG. 8 shows an example of a conventional clamp.
This conventional clamp is a connecting clamp for connecting two pipes. The connecting clamp 2 includes a first clamp body 3 that holds a first pipe, a second clamp body 5 that holds a second pipe, and a holding body 4 that rotatably holds these two clamp bodies. From, it is composed in general.

The first clamp body 3 comprises a first body 12,
It is composed of a first lid body 14, a coupling pin 16, a T-shaped bolt 18, and a hexagon nut 20. The first body 12 is
A bolt support portion 22 is provided at one end, a pin support portion 24 is provided at the other end, and a main body side holding portion 26 formed in a substantially L shape is provided so as to connect them. The first lid 14 is provided with a pin support portion 28 at one end and a nut receiving portion 30 at the other end, and a lid-side holding portion 32 formed in a substantially arc shape so as to connect them.

The second clamp body 5 has the same structure as the first clamp body 3. The holding body 4 is formed in a cylindrical shape with both flanges, and holds the first and second clamp bodies 3 and 5 rotatably with respect to each other.

An example of a method of using this conventional clamp when assembling a grid-shaped temporary scaffold will be described with reference to FIGS. 9 and 8.

When constructing a temporary grid-like scaffold, as shown in FIG. 9, first, a predetermined number of horizontal pipes 80 and two main columns 8 are provided.
2. A predetermined number of vertical pipes 84 and a predetermined number of connecting clamps 2 used for connecting the vertical pipes 84 to the horizontal pipes 80 are prepared. Two main columns 82 arranged in a direction orthogonal to the predetermined number of horizontal pipes 80 are fixed to both ends of the horizontal pipes 80 by an appropriate method so that these members form a ladder shape.

Next, for positioning when connecting a predetermined number of vertical pipes 84, a tape measure, black ink, etc. are used on the surface of the predetermined number of horizontal pipes 80 at predetermined intervals in the longitudinal direction to make an accurate measurement. A predetermined number of positioning marks 80a, 80
b, 80c, ... That is, the positions marked with the positioning marks 80a, 80b, 80c, ... Are the nodes of the lattice formed by the predetermined number of horizontal pipes 80 and vertical pipes 84. Next, the connecting clamp 2 is attached to the horizontal pipe 80. This work is performed as follows.
First, the first main body 1 of the first clamp body 3 shown in FIG.
The horizontal pipe 80 is sandwiched between 2 and the first lid 14. next,
Rotate the T-shaped bolt 18 around the pin portion 18a,
A nut receiving portion 30 having a screw portion provided on the first lid body 14.
So as to come to the opening 30a. Finally, tighten the hexagon nut 20.

In this case, as shown in FIG. 9, the positioning mark 80a attached to the lateral pipe 80 comes to the center of the first main body 12 or the first lid 14 of the connecting clamp 2 in the width direction. Therefore, the connection clamp 2 must be positioned. This is for accurately mounting the clamp 2 on the above-mentioned lattice node. By repeating this operation, a predetermined number of connecting clamps are attached to all the predetermined number of horizontal pipes. That is, first, the connecting clamps 2 are attached to all of the above-mentioned lattice nodes.

Next, one of the prepared vertical pipes 84 is attached to the connecting clamp 2 attached to the horizontal pipe 80. This work is performed as follows. First, the vertical pipe 84 is orthogonal to the horizontal pipe 80, that is, the axis of the vertical pipe 84 includes all the grid nodes G11 to G13 that form a straight line in the vertical direction among the grid nodes described above. To arrange.

Next, the above-mentioned lattice nodes G11 to G13.
The second clamp body 5 of the one connection clamp 2 shown in FIG.
Of the second main body 52 and the second lid 54, the vertical pipe 8
4 are sandwiched, and attachment is performed by the same procedure as in the case of the first clamp body 3 described above. By sequentially performing the same work, one vertical pipe 84 is attached to the above-described ladder-shaped horizontal pipe 80.

Thereafter, the same operation is repeated, and all the vertical pipes 84 are replaced by the horizontal pipes 80 which are constructed in the above-mentioned ladder shape.
Then, the temporary scaffold in the form of a grid is completed by mounting it.

[0012]

When assembling the above-mentioned grid-like temporary scaffold, an important point is that a predetermined number of connecting clamps 2 to which one vertical pipe 84 is to be attached are precisely arranged in a straight line. It means that you have to. This is because the vertical pipe 84 cannot be attached to the connecting clamp 2 if the connecting clamp 2 is not accurately aligned. Even if it could be installed, the deformation of the vertical pipes 84 may cause distortion in the entire scaffold, or excessive stress may be generated in the components of the scaffold. As a result, such temporary scaffold construction work This is because the safety of workers and the like may be impaired when used for such purposes.

Further, when a single vertical pipe 84 is mounted on a predetermined number of the connecting clamps 2, the mounting angles of the connecting clamps 2 with respect to the horizontal pipes 80 are accurately aligned so that the vertical pipes 84 are accurately placed in the lattice plane. I need to put it.
This is because, if the attachment angles of the connection clamps 2 are not accurately aligned, the vertical pipe 84 cannot be attached to the same as in the above case.

In order to avoid such a situation, the connecting clamp is attached to the horizontal pipe 80 in a so-called temporarily fixed state, and after the vertical pipe 84 is attached to the connecting clamp 2, the horizontal pipe 80 is again attached. A method of tightening is also conceivable. However, in this method, the position of the connecting clamp may be inadvertently shifted during the work of assembling the temporary scaffold. Also, since the number of man-hours for temporary fixing work increases,
As a result of delaying work delivery time and increasing work cost,
Not preferable.

Therefore, the connecting clamp 2 is accurately attached to each of the above-mentioned grid nodes, that is, the positioning mark 80a provided on the surface of the ladder-shaped lateral pipe 80 is located at the center of the connecting clamp 2. Like
Accurate mounting is required. Also, the horizontal pipe 80
It is necessary to accurately align the mounting angles of the connecting clamp 2 with respect to.

However, when the conventional clamp is applied to the above-mentioned work or the like, if the positioning mark 80a attached to the pipe 80 is positioned so that the positioning mark 80a is located at the center of the width direction of the clamp 2, the positioning is performed. Since the mark 80a is hidden by the clamp body 12 or the lid body 14, accurate positioning cannot be performed, which is inconvenient. Moreover, since the attachment angle of the connecting clamp 2 with respect to the lateral pipe 80 is set by intuition, it is inaccurate.

The present invention improves the positioning function of such a conventional clamp, provides a clamp that can be accurately and easily positioned with respect to a material to be held such as the pipe 80, and accurately positions the clamp. ,
Moreover, it is an object of the present invention to provide a material to be held and a joint between the materials to be held that can be easily performed.

[0018]

The clamp according to claim 1 comprises:
It is characterized in that a see-through hole is provided in the vicinity of the center in the width direction of the main body side holding portion or the lid side holding portion.

According to a second aspect of the present invention, in the clamp according to the first aspect, the measurement engaging portion is provided continuously or in the vicinity of the see-through hole in the widthwise direction of the see-through hole. It is characterized by the provision of.

According to a third aspect of the present invention, in the clamp according to the second aspect, the measuring engagement portion is provided on at least one of an upper edge and a lower edge of the see-through hole, and the measuring engaging portion faces outward from the see-through hole. The clamp according to claim 4, wherein the clamp is formed in a groove shape narrower than the see-through through-hole and is continuous with the see-through through-hole.
The measurement engaging portion is provided in the vicinity of at least one of the upper edge or the lower edge of the see-through hole, in the direction orthogonal to the width direction of the see-through hole, in a groove shape narrower than the see-through hole, It is characterized in that it is formed independently of the see-through hole.

According to a fifth aspect of the present invention, in the clamp according to the second aspect, the measuring engagement portion is provided on at least one of an upper edge and a lower edge of the see-through hole, and the measuring engaging portion faces inwardly of the see-through hole. It is characterized in that it is formed in a convex shape.

According to a sixth aspect of the present invention, there is provided the clamp according to the first aspect, in which at least one of the upper edge and the lower edge of the see-through hole is continuous with the see-through hole or near the see-through hole. A feature is that a direction reference mark is provided.

The clamp according to claim 7 is characterized in that the main body, the lid or the fastening means is provided with a measuring engaging portion whose longitudinal direction is a direction orthogonal to the width direction of the main body or the lid.

A clamp according to an eighth aspect is the clamp according to the seventh aspect, characterized in that the fastening means includes a T-shaped bolt, and the measurement engaging portion is provided at a tip end portion of the T-shaped bolt on the screw portion side. To do.

The clamp according to claim 9 is characterized in that a circumferential reference mark is provided in the main body side holding portion or the lid side holding portion in the vicinity of the exposed portion of the held material.

According to a tenth aspect of the present invention, in the clamp of the ninth aspect, the circumferential reference mark is provided in the vicinity of a position facing the front surface of the material to be held when the clamp is assembled to the material to be held. Is characterized by.

According to the eleventh aspect of the present invention, in the clamp, the main body side holding portion of the first main body or the second main body or the lid side holding portion of the first lid or the second lid is seen through near the center in the width direction. It is characterized by the provision of a through hole for use. The clamp according to claim 12 is the clamp according to claim 11, wherein a measuring engagement portion is provided continuously or in the vicinity of the see-through hole in the widthwise center of the see-through hole. It is characterized by that.

A clamp according to a thirteenth aspect is the clamp according to the twelfth aspect, wherein the measuring engagement portion is provided on at least one of an upper edge and a lower edge of the see-through hole, and the measuring engaging portion faces outward from the see-through hole. The clamp of claim 14 is characterized in that the clamp is formed in a groove shape narrower than the see-through hole and is continuous with the see-through hole. It is provided near at least one of the upper edge and the lower edge of the see-through hole, and is independent of the see-through hole in a groove shape narrower than the see-through hole in the direction orthogonal to the width direction of the see-through hole. It is characterized by being formed.

According to a fifteenth aspect of the present invention, in the clamp of the twelfth aspect, the measuring engagement portion is provided at at least one of an upper edge and a lower edge of the see-through hole, and is directed toward the inside of the see-through hole. It is characterized in that it is formed in a convex shape.

According to a sixteenth aspect of the present invention, in the clamp of the eleventh aspect, at least one of an upper edge and a lower edge of the see-through hole has a shaft connected to the see-through hole or in the vicinity of the see-through hole. A feature is that a direction reference mark is provided.

A clamp according to a seventeenth aspect is the clamp according to the sixteenth aspect, characterized in that the axial reference mark is provided substantially at the center in the width direction of the see-through hole.

The clamp according to claim 18 is the clamp according to claim 16, wherein the axial reference mark is provided on the first main body or the first lid, and the first held material and the second held object are held. In the vicinity of the position corresponding to the center line of the second object to be held when the members are orthogonal to each other, or on the second main body or the second lid, the first object to be held and the second object to be held. It is characterized in that it is provided near the position corresponding to the center line of the first object to be held when the object to be held is orthogonal.

According to a nineteenth aspect of the present invention, in the clamp, the first main body, the first lid body or the first fastening means has a longitudinal direction in a direction orthogonal to the width direction of the first main body or the first lid body.
Alternatively, a measurement engaging portion is provided on the second main body, the second lid or the second fastening means with the direction orthogonal to the width direction of the second main body or the second lid as the longitudinal direction. Is characterized by.

A clamp according to a twentieth aspect is the clamp according to the nineteenth aspect, wherein at least one of the first fastening means and the second fastening means is provided with a T-shaped bolt, and the measuring engaging portion is provided with the T-shaped bolt. It is characterized in that at least one of them is provided at the tip end on the screw side.

According to a twenty-first aspect of the present invention, in the clamp, the main body side holding portion of the first main body or the lid side holding portion of the first lid body is near the exposed portion of the first held material, or the main body of the second main body. It is characterized in that a circumferential reference mark is provided in the vicinity of the exposed portion of the second held material of the side holding portion or the lid side holding portion of the second lid.

A clamp according to a twenty-second aspect is the clamp according to the twenty-first aspect, wherein the circumferential reference mark is mounted on the first main body or the first lid, and the clamp is attached to the first held material. Provided in the vicinity of the position facing the front of the first to-be-held material at the time of work, or on the second main body or the second lid body, assembling work of the clamp to the second to-be-held material It is characterized in that it is provided in the vicinity of the position facing the front of the second object to be held at times.

A clamp according to a twenty-third aspect is the clamp according to the twenty-first aspect, wherein the circumferential reference mark is provided on the first main body or the first lid body, and the first held material and the second held object. In the vicinity of the position corresponding to the center line of the first object to be held when the members are orthogonal to each other, or on the second main body or the second lid, the first object to be held and the second object to be held. It is characterized in that it is provided near the position corresponding to the center line of the second object to be held when the object to be held is orthogonal.

According to a twenty-fourth aspect of the present invention, there is provided a clamp in which the first holding member and the second holding member intersect with each other in the axial center of the holding body for rotatably holding the first main body and the second main body. It is characterized in that it is formed so as to pass in the vicinity of the intersection of the respective center lines.

According to a twenty-fifth aspect of the present invention, in the held material, one or more axial positioning marks for positioning the clamp in the axial direction are provided on the surface at predetermined axial positions, or on the surface in the circumferential direction. Is provided with one or more circumferential positioning marks for positioning the clamp in the circumferential direction.

According to a twenty-sixth aspect of the present invention, there is provided a held-to-be-held material according to the twenty-fifth aspect, wherein the held-to-be-held material is a pipe, and a positioning pin having a diameter of one of the pipes as an axis is provided in the vicinity of an end of the pipe. And the angle formed by the straight line connecting the circumferential positioning mark and the center of the pipe and the one diameter is set to a predetermined value.

According to a twenty-seventh aspect of the present invention, in the inner expansion joint, the pipe insertion length of at least one of the upper body pipe inserting portion and the lower body pipe inserting portion is set so that It is characterized in that it is formed so as not to exceed the distance to the positioning pin with the diameter of one as the axis.

[0042]

In the clamp according to the first and eleventh aspects, the see-through hole is provided near the center in the width direction of the main body side holding portion or the lid side holding portion. Therefore,
When this clamp is used for holding a pipe or the like, the positioning mark attached to the surface of the held material such as the pipe can be easily visually recognized through the see-through hole.

In the clamps of the second and the twelfth aspects, the engaging portion for measurement is provided continuously or in the vicinity of the see-through hole at the approximate center in the width direction of the see-through hole. It is characterized by that. Therefore, the positioning mark provided on the surface of the material to be held can be easily visually recognized through the see-through hole, and the L-shaped end portion of the tape measure or the like is locked to the measurement engaging portion. be able to.

In the clamps of the third and thirteenth aspects, the measuring engagement portion is provided on at least one of the upper edge and the lower edge of the see-through hole, and the see-through is provided toward the outside of the see-through hole. It is formed in a groove shape thinner than the viewing through-hole and is continuous with the see-through through-hole. Therefore, by inserting an L-shaped end portion such as a tape measure into the thin groove-shaped engagement portion for measurement,
The L-shaped end portion of a tape measure or the like can be securely locked.

In the clamps according to claims 4 and 14, the measuring engagement portion is provided near at least one of the upper edge and the lower edge of the see-through hole, and is orthogonal to the width direction of the see-through hole. Direction, in the shape of a groove thinner than the see-through hole,
It is formed independently of the see-through hole. Therefore,
It is possible to provide the groove-shaped measuring engagement portion while imparting a certain strength to the main body or the lid.

In the clamps of the fifth and the fifteenth aspects, the measuring engagement portion is provided on at least one of the upper edge and the lower edge of the see-through hole, and is convex toward the inside of the see-through hole. Is formed in. Therefore, even when the space of the see-through hole is limited, the measuring engagement portion can be provided.

The clamp according to claim 6 and claim 16 has an axial reference mark on at least one of the upper edge and the lower edge of the see-through hole, which is continuous with the see-through hole or near the see-through hole. Is provided. Therefore, the axial positioning mark provided on the surface of the material to be held and the axial reference mark provided on the clamp can be easily visually matched through the see-through hole.

According to the clamps of claims 7 and 19, the main body, the lid or the fastening means is provided with a measuring engaging portion having a longitudinal direction in a direction orthogonal to the width direction of the main body or the lid. Characterize. Therefore, the L-shaped end portion of the tape measure or the like can be locked to the measurement engaging portion.

The clamps of claims 8 and 20 are characterized in that the fastening means includes a T-shaped bolt, and the measurement engaging portion is provided at the tip end of the T-shaped bolt on the screw portion side. Therefore, it is possible to provide the measurement engagement portion while minimizing the change of the parts.

The clamps of claims 9 and 21 are characterized in that a circumferential reference mark is provided in the main body side holding portion or the lid side holding portion in the vicinity of the exposed portion of the held material. Therefore, the circumferential positioning mark provided on the surface of the material to be held and the circumferential reference mark provided on the clamp can be easily visually matched.

The clamps according to claim 10 and claim 22,
It is characterized in that the circumferential reference mark is provided in the vicinity of a position facing the front surface of the material to be held when the clamp is attached to the material to be held. Therefore, when the circumferential positioning mark is provided on the front surface of the material to be held during the assembling work, the circumferential positioning mark and the circumferential reference mark of the clamp can be easily visually matched.

A clamp according to a seventeenth aspect is the clamp according to the sixteenth aspect, characterized in that the axial reference mark is provided substantially at the center in the width direction of the see-through hole. Therefore, the axial positioning mark provided on the surface of the material to be held and the approximate center of the clamp in the width direction can be easily visually matched.

The clamp according to claim 18 is the clamp according to claim 16, wherein the axial reference mark is provided on the first main body or the first lid body, and the first held material and the second held object. In the vicinity of the position corresponding to the center line of the second object to be held when the members are orthogonal to each other, or on the second main body or the second lid, the first object to be held and the second object to be held. It is characterized in that it is provided near the position corresponding to the center line of the first object to be held when the object to be held is orthogonal. Therefore, by aligning the axial reference mark of the clamp with the axial positioning mark on the surface of the material to be held, when viewed from the direction of the vertical line common to the two materials to be held at right angles, the material to be held is held. It is possible to match the axial positioning mark provided on the surface of the and the center line of the material to be held which is orthogonal to the axial positioning mark.

A clamp according to a twenty-third aspect is the clamp according to the twenty-first aspect, wherein the circumferential reference mark is provided on the first main body or the first lid, and the first held material and the second held object are held. In the vicinity of the position corresponding to the center line of the first object to be held when the members are orthogonal to each other, or on the second main body or the second lid, the first object to be held and the second object to be held. It is characterized in that it is provided near the position corresponding to the center line of the second object to be held when the object to be held is orthogonal. Therefore, by aligning the circumferential reference mark of the clamp with the circumferential positioning mark provided on the surface of the material to be held, when viewed from the direction of the vertical line common to two orthogonal materials to be held, the material to be held is held. The circumferential positioning mark provided on the surface of the object can be aligned with the center line of the material to be held.

According to a twenty-fourth aspect of the present invention, in the clamp according to the twenty-first aspect, the axis of the holder for rotatably holding the first main body and the second main body intersects the first held material and the second held material. It is characterized in that it is formed so as to pass in the vicinity of the intersection of the respective center lines. Therefore, even when the first held material and the second held material intersect at any angle, they always intersect at a specific point.

According to a twenty-fifth aspect of the object to be held, one or more axial positioning marks for positioning the clamp in the axial direction are provided on the surface at predetermined axial positions, or on the surface in the circumferential direction. Is provided with one or more circumferential positioning marks for positioning the clamp in the circumferential direction. Therefore, the axial positioning mark or the circumferential positioning mark can be provided in advance in the process of manufacturing the material to be held.

According to a twenty-sixth aspect of the present invention, there is provided a held-to-be-held material according to the twenty-fifth aspect, wherein the held-to-be-held material is a pipe, and a positioning pin having a diameter of one of the pipes as an axis is provided near an end of the pipe. And the angle formed by the straight line connecting the circumferential positioning mark and the center of the pipe and the one diameter is set to a predetermined value. Therefore, when connecting two or more pipes, it is possible to have a constant angular relationship between the respective circumferential positioning marks by providing a constant angular relationship between the respective positioning pins.

According to a twenty-seventh aspect of the present invention, in the inflatable joint, the pipe insertion length of at least one of the upper body pipe insertion portion and the lower body pipe insertion portion of the pipe provided near the end portion of the pipe It is characterized in that it is formed so as not to exceed the distance to the positioning pin with the diameter of one as the axis. Therefore, when connecting two or more pipes, the pipes can be connected regardless of the angle between the alignment pins.

[0059]

1 and 2 show the construction of a clamp according to a first embodiment of the present invention. As shown in FIG. 2A, this clamp is a connecting clamp for connecting two pipes. The connecting clamp 2 includes a first clamp body 3 that holds a first pipe, a second clamp body 5 that holds a second pipe, and a holding body 4 that rotatably holds these two clamp bodies. From, it is composed in general.

The first clamp body 3 comprises a first body 12,
It is composed of a first lid body 14, a coupling pin 16, a T-shaped bolt 18, and a hexagon nut 20.

As shown in FIG. 4A, the first lid 14 is
A pin support portion 28 is provided at one end, a nut receiving portion 30 is provided at the other end, and a lid-side holding portion 32 formed in a substantially arc shape so as to connect these is provided.

The cross section of the pin support portion 28 is formed in a concave shape, and is composed of a base portion 28b and rising portions 28c provided on both sides of the base portion. A pair of pin support holes 28a are provided in the rising portion 28c of the pin support portion 28. The base portion 28b is formed continuously with the two ribs 32b of the lid-side holding portion 32, which will be described later.

The nut receiving portion 30 is projectingly provided in a tongue shape outward from the circular arc from one end of the lid side holding portion 32 formed in the substantially circular arc shape. The cross section of the nut receiving portion 30 is formed in a concave shape, and includes a base portion 30b and rising portions 30c provided on both sides of the base portion 30b.

As shown in FIG. 1A, at the base portion 30b of the nut receiving portion 30, an opening 3 opened in a U shape toward the tip.
0a is provided. This is a T-shaped bolt 1 described later.
With the hexagon nut 20 screwed onto the
This is because it is possible to open and close. Therefore, this facilitates the work of attaching and detaching the pipe or the like. As shown in FIG. 1A, a transparent through hole 34 is provided in the vicinity of the center in the width direction (X direction) of the lid side holding portion 32. In this embodiment, the see-through hole 34 is provided in a central recess 32a, which will be described later, and is formed in a substantially rectangular shape having one side in the X direction and another side in the direction orthogonal to this. As shown in the horizontal cross section of FIG. 4B, the lid-side holding portion 32 is provided with two ribs 32b sandwiching the central recess 32a in order to increase rigidity.

As shown in FIG. 2A, the first body 12 is
A bolt support portion 22 is provided at one end, a pin support portion 24 is provided at the other end, and a main body side holding portion 26 formed in a substantially L shape is provided so as to connect them. Further, the cross section of the first main body 12 is formed in a concave shape over almost the entire area, and is composed of a base portion and rising portions provided on both sides of the base portion.

As shown in FIG. 2A, a pair of pin support holes 24a are formed in the rising portion 24c of the pin support portion 24. A pair of bolt support holes 22a are provided in the rising portion 22c of the bolt support portion 22.

On one side of the main body side holding portion 26 having an L shape,
As shown in FIG. 1B, the base portion 26b on the side having the pin support portion 24 is provided with a see-through hole 44 near the center in the width direction (X direction). In this embodiment, the see-through hole 44 is formed in a substantially rectangular shape having one side in the X direction and the other side in the direction orthogonal to this.

As shown in FIG. 2A, the T-shaped bolt 18 is
A pair of pin portions 18a having a predetermined length are provided at the end portion of the non-threaded portion side of the bolt having the threaded portion in a direction orthogonal to the axis of the threaded portion (the depth direction of the paper surface), and a T-shape is formed as a whole. It is formed so that. The cross section of the pin portion 18a is circular. This pin portion 18a, in the pair of bolt support holes 22a provided in the bolt support portion 22 of the main body,
By inserting the T-shaped bolt 18 while providing a predetermined play, the T-shaped bolt 18 is held so as to be swingable in the arrow β direction with respect to the first main body 12. A hexagon nut 20 is screwed onto the threaded portion of the T-shaped bolt 18.

The connecting pin 16 has a cylindrical shape. As shown in FIG. 1A, this coupling pin is provided with a pair of pin support holes 24 a provided in the pin support portion 24 of the first main body 12.
And a pair of pin support holes 28a provided in the pin support portion 28 of the first lid body 14 so as to penetrate therethrough, the first main body 12 and the first lid body 14 are As shown in FIG. 2A, they are connected so as to be swingable in the direction of arrow α.

As shown in FIGS. 2A and 2B, the second clamp body 5 also has the same structure as the first clamp body 3. In this embodiment, the second clamp body 5
Similarly to the first clamp body 3, the second main body 52 and the second lid body 54 are also provided with transparent through holes 94 and 74.

The holder 4 is formed in a cylindrical shape with both flanges. The cylindrical portion of the holding body 4 is one side of the L-shaped holding portion of the first and second clamp bodies 3 and 5, and is a circular through hole 26 a provided in the base portion on the side having the bolt support portion 22. Is inserted so as to penetrate these. By sandwiching the base portion between both flanges of the holding body while providing a predetermined play, the first and second clamp bodies 3
And 5 are held rotatably with respect to each other.

A method of using the clamp according to the first embodiment for assembling a grid-shaped temporary scaffold will be described with reference to FIGS. 1, 2A and 9. As shown in FIG. 9, in the case of constructing a grid-like temporary scaffold, as described above, first, a predetermined number of horizontal pipes 80 and two main columns 82 are fixed by an appropriate method, and these members are It is constructed in the shape of a ladder.

Next, for positioning when connecting the vertical pipe 84, a predetermined number of positioning marks 80a, 80 are provided on the surface of the horizontal pipe 80 at predetermined intervals in the longitudinal direction.
b, 80c, ... That is, the positions marked with the positioning marks 80a, 80b, 80c, ... Are the nodes of the lattice formed by the predetermined number of horizontal pipes 80 and vertical pipes 84.

Next, the connecting clamp 2 is attached to the horizontal pipe 80. As shown in FIG. 2A, this work involves sandwiching the lateral pipe 80 between the first main body 12 and the first lid body 14 of the first clamp body 3 and connecting them with the T-shaped bolt 18 and the hexagon nut 20. Perform by tightening.

In this case, as shown in FIG. 9, the positioning mark 80a attached to the lateral pipe 80 comes to the center of the first main body 12 or the first lid 14 of the connecting clamp 2 in the width direction. As described above, the connection clamp 2 must be positioned, but in the clamp according to this embodiment, as shown in FIG. 1A, the see-through hole 34 is formed in the lid-side holding portion 32 of the first lid 14. It is provided near the center in the width direction.

Therefore, as shown in FIG. 1A, the operator can determine the positioning mark 80a attached to the horizontal pipe 80.
Through the through-hole 34 for see-through provided in the first lid 14.
Through the, it is possible to perform the installation work while visually confirming. That is, by arranging the positioning mark 80a so as to be located at the center in the width direction of the see-through hole 34, the positioning mark 80a comes to the center in the width direction of the connecting clamp 2, so that the connecting clamp 2 is positioned. Can be performed accurately and easily.

This work is repeated as shown in FIG.
A predetermined number of connecting clamps are attached to all the predetermined number of horizontal pipes. According to the clamp of this embodiment, the connecting clamp 2 is positioned with respect to the positioning mark 80a attached to the horizontal pipe 80 as described above. Since it can be performed accurately, the connecting clamps 2 can be accurately attached to all of the above-mentioned lattice nodes.

Therefore, among these lattice nodes, as shown in FIG. 9, the lattice nodes forming a straight line in the vertical direction, for example, the three connecting clamps 2 attached to G11 to G13, form a straight line. . That is, when the vertical pipes 84 are attached to the connecting clamps 2, the vertical pipes 84 are not deformed, the assembled scaffold is not distorted, and the constituent members of the scaffold are not excessively stressed. Of.

As shown in FIG. 1A, the horizontal pipe 80
If the positioning mark 80a attached to the mark is formed in a cross shape, the positioning mark 80a is inserted through the see-through hole 34.
By visually recognizing a, the connection clamp 2 can be accurately positioned in the circumferential direction of the horizontal pipe 80, which is more convenient. Also, by doing this, in an ideal state where there is no bending of the scaffolding pipe,
Since it is not necessary to temporarily attach the connecting clamp 2 to the lateral pipe 80, the working cost does not increase.

In the clamp according to this embodiment, as shown in FIG. 1B, the main body side holding portion 26 of the first main body 12 is held.
Also, a see-through hole 44 is provided. This is because, depending on the mounting angle of the clamp 2, the positioning mark 80a attached to the horizontal pipe 80 may not be visible through the through-hole 34 for see-through provided in the lid-side holding portion 32.

Further, as shown in FIGS. 2A and 2B, in the clamp according to this embodiment, the main body side holding portion of the second main body 52 or the lid side holding portion of the second lid 54,
Through-holes 94 and 74 for see-through are provided.

Therefore, the positioning mark 84a provided on the surface of the vertical pipe 84 is provided with the see-through hole 94 provided in the main body side holding portion of the second main body 52 or the lid side holding portion of the second lid 54. Or it can be visually confirmed through 74.

That is, the vertical pipe 84 can be accurately positioned in the direction orthogonal to the horizontal pipe 80.

Next, FIGS. 3 and 4 show the structure of the clamp according to the second embodiment of the present invention. The outline of the structure of the clamp according to this embodiment is similar to that of the first embodiment.

As shown in FIG. 3, the lid side holding portion 32 has
A see-through hole 34 is provided near the center in the width direction (X direction). The see-through hole 34 is provided in the central recess 32a, and is formed in a substantially rectangular shape having one side in the X direction and another side in the direction orthogonal to the X direction.

As shown in FIG. 3, the clamp according to this embodiment is provided with a measuring engaging groove 38 substantially at the center in the width direction of the see-through hole 34. The measurement engagement groove 38 is
An upper edge measuring engagement groove 38a provided at the upper edge 34a of the see-through hole 34 and a lower edge measuring engaging groove 38b provided at the lower edge 34b. Toward, the groove is thinner than the see-through hole 34, and is formed continuously with the see-through hole 34. The width of the measurement engagement groove 38 is preferably about 2 mm from the relationship of the thickness t of the L-shaped end portion 90a of the tape measure 90 (see FIG. 4C) and the tolerance between the clamps, which will be described later.

As shown in FIG. 4A, the upper edge measuring engagement groove 3
8a is formed so as to reach the base portion 28b of the pin support portion 28, starting from the upper edge 34a of the see-through hole 34 provided in the central recess 32a of the lid-side holding portion 32. It should be noted that, as shown in the cross section of FIG. 4B, the lid-side holding portion 32 has a double rib 32b sandwiching a central recess 32a.
Is provided.

A method of using the clamp according to the second embodiment will be described with reference to FIGS. 3 and 4. As shown in FIG. 3, the clamp according to this embodiment, like the clamp according to the first embodiment described above, has a positioning mark 80a attached to the horizontal pipe 80 when it is attached to the horizontal pipe 80. It is performed by visually observing through the through-hole 34 for see-through provided on the lid-side holding portion 32 of. Therefore,
The connection clamp 2 can be accurately and easily positioned with respect to the lateral pipe 80.

When a plurality of connecting clamps 2 are fastened to one horizontal pipe 80, the distance between the clamps 2 can be measured using a tape measure or the like as described below. First, one connecting clamp 2 on the horizontal pipe 80
Install. Next, the L-shaped end portion 90a of the tape measure 90 is locked in the measurement engagement groove 38 formed continuously with the see-through hole 34 provided in the lid 14 of the connection clamp 2.

In this case, as shown in FIG. 4A, the upper edge measuring engagement groove 38a is formed so as to reach the base portion 28b of the pin supporting portion 28. Therefore, as shown in FIG. 4B, the length of the locking portion of the L-shaped end portion 90a of the tape measure 90 is smaller than the step between the top of the rib 32b provided on the lid-side holding portion 32 and the central recess 32a. The L-shaped end portion 90a of the tape measure 90 even if it is short,
Therefore, it can be securely locked.

Next, as shown in FIG. 3, the measurement engagement groove 3 is formed.
The tape measure 90 in which the L-shaped end 90a is locked to 8 is arranged along the horizontal pipe 80, and the distance is measured from the attached clamp as a starting point. Ink or the like is used at a predetermined position on the horizontal pipe 80 measured by the tape measure 90,
A predetermined number of positioning marks 80b, 80c, ... Are newly attached.

Next, using the newly added positioning marks 80b, 80c, ... As marks, a predetermined number of connecting clamps 2 are attached to the horizontal pipe 80 in the same manner as in the above-described method. By performing the same operation on a predetermined number of horizontal pipes 80, a predetermined number of connecting clamps can be accurately attached to all of the above-mentioned lattice nodes. Finally, a predetermined number of vertical pipes 84 are attached to these clamps 2.

Therefore, according to the clamp in this embodiment, the vertical pipe 84 can be accurately and easily positioned with respect to the horizontal pipe 80 by visual inspection, and the horizontal pipe 80 is temporarily provided with the positioning mark 80b ,.
Even if 80c, ... Are not attached in advance, the positioning can be accurately performed using a tape measure or the like.

In the above-described method, the positioning marks 80b, 80c, ... Are attached to the predetermined positions on the horizontal pipe 80 measured by the tape measure 90 using black ink or the like, but the marks are not attached. Alternatively, the separate connection clamp 2 may be directly attached to the horizontal pipe 80.

Next, FIG. 5 shows a structure of a clamp according to a third embodiment of the present invention.

The outline of the structure of the clamp according to this embodiment is similar to that of the first and second embodiments. As shown in FIG. 5, a transparent through hole 34 is provided in the vicinity of the center in the width direction (X direction) of the lid side holding portion 32. The see-through hole 34 is provided in the central recess 32a, and is formed in a substantially rectangular shape having one side in the X direction and another side in the direction orthogonal to the X direction.

In the clamp according to this embodiment, as shown in FIG. 5, a measuring engaging portion 40 is provided substantially at the center in the width direction of the see-through hole 34. Measurement engagement part 40
Is provided near the upper edge 34a of the see-through hole 34,
On the outside of the see-through hole 34 and on the base portion 28b of the pin support portion 28 in the direction orthogonal to the X direction, the see-through hole 34 is provided.
It is formed in a groove shape narrower than that of the transparent through hole 34 independently of the through hole 34. Therefore, as shown in FIG. 3, as compared with the above-described second embodiment in which the measurement engagement groove 38 is continuously formed in the see-through hole 34, the strength of the lid 14 is reduced.
In particular, deterioration of torsional rigidity can be prevented to some extent. The width of the measurement engaging portion 40 is 2 m as in the second embodiment.
About m is preferable. Further, the length of the measurement engaging portion 40 is
15 to 3 so that the L-shaped end portion 90a of the tape measure 90 can be engaged.
About 0 mm is desirable. In addition, in the lid side holding portion 32,
As shown in the cross section of FIG. 4B, a rib 32b is formed between the central recess 32a and the rib 32b.

The method of using the clamp according to the third embodiment is almost the same as that of the above-mentioned second embodiment. That is, as in the case of the second embodiment, when the horizontal pipe 80 is attached, as shown in FIG. When mounting the connecting clamp 2, measure the distance between the connecting clamps to be attached.
As shown in FIG. 5, the L-shaped end portion 90a of the tape measure 90 is engaged with the measuring engagement portion 40 provided at the center of the lid body 14 of the clamp 2 in the width direction.

Therefore, according to the clamp of this embodiment, similarly to the second embodiment, the vertical pipe 84 can be positioned with respect to the horizontal pipe 80 accurately and easily by visual inspection, and the clamp has a constant strength. Even if required, a tape measure or the like can be used to accurately position the second material to be held.

In this embodiment, the measuring engaging portion 40 is formed in the base 28b of the pin supporting portion 28 in the shape of a thin groove, but the measuring engaging portion 40 is convex on the base 28b. You may form in a shape. Further, the measurement engaging portion 40 does not necessarily have to be provided at the center of the lid body 14 in the width direction.

Next, FIG. 6 shows the structure of a clamp according to the fourth embodiment of the present invention. The outline of the structure of the clamp according to this embodiment is similar to that of the first to third embodiments. As shown in FIG. 6, a see-through hole 34 is provided in the vicinity of the center in the width direction (X direction) of the lid-side holding portion 32. The see-through hole 34 is provided in the central recess 32a, and is formed in a substantially rectangular shape having one side in the X direction and another side in the direction orthogonal to the X direction.

In the clamp according to this embodiment, as shown in FIG. 6, a measuring engagement projection 36 is provided substantially at the center in the width direction of the see-through hole 34. The measurement engagement protrusion 36 includes an upper edge 34a and a lower edge 34b of the see-through hole 34.
Is formed in a convex shape toward the inside of the see-through hole.
Therefore, even when the space of the see-through hole 34 is limited, the measuring engagement portion can be provided.
The width of the measurement engagement protrusion 36, that is, the dimension in the X direction is preferably about 3 mm or less in view of the tolerance of the distance between the clamps. The lid-side holding portion 32 is provided with a double rib 32b sandwiching the central recess 32a, as shown in the cross section of FIG.

The method of using the clamp according to the fourth embodiment is almost the same as that of the above-mentioned second and third embodiments. That is, as in these embodiments, when the pipe is attached to the horizontal pipe 80, as shown in FIG.
When a is performed by visually observing a through the see-through hole 34 and at the same time a plurality of connecting clamps 2 are attached to the horizontal pipe 80, the distance between the connecting clamps to be attached is measured as shown in FIG. This is done by locking the L-shaped end portion 90a of the tape measure 90 to the measurement engaging projection 36 provided at the center of the lid body 14 of the clamp 2 in the width direction.

Therefore, according to the clamp of this embodiment, the vertical pipe 84 can be accurately and easily positioned with respect to the horizontal pipe 80 by visual observation, and the size of the clamp is limited, as in the above-described embodiments. Even in such a case, it is possible to accurately position the second objects to be held together by using a tape measure or the like.

Next, FIG. 10 shows the structure of a clamp according to the fifth embodiment of the present invention. The outline of the structure of the clamp according to this embodiment is the same as that of the above-mentioned embodiment.

In the clamp according to the present embodiment, as shown in FIG. 10, the direction orthogonal to the width direction of the lid 14 is set to be the longitudinal direction at substantially the center of the threaded end of the T-shaped bolt 18. A measurement engaging portion 40 is provided. Therefore, without changing the configurations of the lid 14 and the main body 12,
A measurement engagement portion can be provided.

The method of using the clamp according to the fifth embodiment is almost the same as that of each of the above-mentioned embodiments. That is, similarly to these embodiments, when a plurality of connecting clamps 2 are attached to the horizontal pipe 80, the distance between the connecting clamps to be attached is measured by measuring the screw portion of the T-shaped bolt 18 of the clamp 2 as shown in FIG. 10B. This is done by locking the L-shaped end portion 90a of the tape measure 90 to the measuring engagement portion 40 provided at the side tip portion.

Therefore, according to the clamp of this embodiment, the plurality of vertical pipes 84 can be accurately positioned with each other by using a tape measure or the like without making a great change in the parts.

Further, in the present embodiment, the measuring engaging portion 40 is provided substantially at the center of the tip end of the T-shaped bolt 18 on the screw side, but the measuring engaging portion 40 is as shown in FIG. , The body 12 at approximately the center of the base portion 18b of the T-shaped bolt 18 in the X direction.
You may provide so that the direction orthogonal to the width direction (X direction) of may be made into a longitudinal direction. Further, in the present embodiment, the T-shaped bolt 18 and the hexagon nut 20 are used as the fastening means, but even if other fastening means are used, the fastening means is provided with the measurement engaging portion. be able to.

As described above, when the measuring engaging portion 40 is provided at the center position in the width direction of the main body 12 or the lid body 14 of the clamp 2, as shown in FIG. 10A, the main body 12 or the lid body 14 in the width direction. When the center and the center line of the vertical pipe 84 coincide with each other, the measuring engaging portion 40 and the center line of the vertical pipe 84 coincide with each other. Therefore, when it is desired to measure the distance with the center line of the vertical pipe 84 as a reference, it is convenient to lock the L-shaped end portion of the tape measure 90 to the engaging portion 40. In this case, the width of the measuring engagement portion 40 is the same as in the second embodiment.
About 2 mm is preferable.

When the center of the main body 12 or the lid 14 in the width direction and the center line of the vertical pipe 84 do not coincide with each other, the main pipe 12, the lid 14 or the T-bolt 18 is on the vertical pipe 84. Providing the measurement engaging portion 40 at a position corresponding to the center line is convenient as in the above case.

If it is not necessary to measure the distance with the center line of the vertical pipe 84 as a reference, the engaging portion 40 does not need to correspond to the center line of the vertical pipe 84, and may be provided at any position. Good.

Next, FIG. 12 shows the structure of a clamp according to a sixth embodiment of the present invention. The outline of the structure of the clamp according to this embodiment is the same as that of the above-mentioned embodiment.

In the clamp according to this embodiment, as shown in FIGS. 2A and 12, the axis of the holding body 4 is
Intersection 100a of the center lines of the horizontal pipe 80 and the vertical pipe 84
It is formed to pass through. The lid 14 is provided with axial reference marks 102a and 102b near the upper edge 34a and the lower edge 34b of the see-through hole 34 at positions corresponding to the center line of the vertical pipe 84, respectively.

On the lid-side holding portion 32 of the lid body 14, in the vicinity where the horizontal pipe 80 is exposed and at the position corresponding to the center line of the horizontal pipe 80, the circumferential reference marks 104a, 1
04b, 104c, 104d are provided. In the present embodiment, 104a and 104b are provided in the vicinity of the widthwise end of the lid, and 1 is provided in the vicinity of the widthwise end of the see-through hole 34.
04c and 104d are provided, respectively.

Further, the lateral pipe 80 is provided with a circumferential positioning mark 106 and an axial positioning mark 108a at predetermined positions in the circumferential direction and the axial direction, respectively. A method of using the clamp according to the sixth embodiment is shown in FIG.
Will be explained. When the connecting clamp 2 is attached to the horizontal pipe 80, the axial reference mark 102a or 102b of the connecting clamp 2 to be attached and the axial positioning mark 108a of the horizontal pipe 80 are aligned in a direction orthogonal to the horizontal pipe 80. Adjust the axial position of the clamp.

Next, any one of the circumferential reference marks 104a to 104d of the connecting clamp 2 and the circumferential positioning mark 106 of the lateral pipe 80 are aligned in the circumferential direction of the clamp so that they are aligned in the axial direction of the lateral pipe 80. Is adjusted, and the clamp 2 is fixed to the horizontal pipe 80 at this position.

By performing the positioning in this way, when the vertical pipe 84 is later attached to the clamp 2, the center line of the vertical pipe 84 is accurately positioned at the position of the axial positioning mark 108a attached to the horizontal pipe 80. Can be matched.

When a plurality of clamps 2 are attached to the horizontal pipe 80, the axial reference marks 102a or 102b of the other connecting clamps 2 are aligned with the other axial positioning marks 108b of the horizontal pipe 80. , The circumferential reference marks 104a to 104 of the connecting clamp 2
By matching any one of d with the circumferential positioning mark 106 of the lateral pipe 80, the clamps 2 can be accurately positioned in the axial direction and the circumferential direction.

Therefore, when a plurality of vertical pipes 84 are attached to the plurality of clamps 2 later, the plurality of vertical pipes 84 will be located on a predetermined plane. Therefore, at the time of assembling the pipe, the clamp 2 can be accurately attached to the horizontal pipe 80 in advance, and the temporary fixing work can be omitted, so that the assembling period on site can be shortened.

Further, as in this embodiment, the connecting clamp 2
The axial reference mark 102a or 102b of the vertical pipe 8
4 and the circumferential reference marks 104a to 104d of the connecting clamp 2 are provided so as to coincide with the center line of the horizontal pipe 80, the center line of each pipe on the design drawing used for the pipe assembling work. And the axial reference mark 102a or 102b and the circumferential reference marks 104a to 104d provided on the connection clamp 2 coincide with each other. On the other hand, in general, a design drawing used for a pipe assembling work is described with dimensions based on the center line of the pipe. Therefore, if these reference marks are used as distance measurement standards, it is not necessary to convert the dimensions according to the thickness of the pipe, and the drawing dimensions can be directly applied to distance measurement work.
It is convenient.

Furthermore, in this embodiment, the axis of the holder 4 is formed so as to pass through the intersection 100a of the center lines of the horizontal pipe 80 and the vertical pipe 84. Therefore, when the horizontal pipe 80 and the vertical pipe 84 intersect at any angle, the center line of the vertical pipe 84 corresponds to the axial reference mark 102 a or 102 b provided on the connecting clamp 2. Therefore, it is not necessary to separately provide the axial reference mark 102a or 102b depending on the intersection angle between the horizontal pipe 80 and the vertical pipe 84, which is convenient. Further, in this embodiment, the circumferential reference marks 104a to 104 are provided.
d is a horizontal pipe 80 on the lid-side holding portion 32 of the lid 14.
It is provided near the exposed portion of the horizontal pipe 80 and at a position corresponding to the center line of the horizontal pipe 80. When provided at this position, the circumferential positioning mark 106 of the horizontal pipe 80 can be made to face the front of the operator, so that the positioning of the connecting clamp 2 with respect to the horizontal pipe 80 in the circumferential direction becomes easy.

Further, the circumferential reference marks 104a to 10a are used.
4d is a horizontal pipe 8 on the lid-side holding portion 32 of the lid 14.
It can be provided at any position other than the above in the vicinity where 0 is exposed.

Next, FIG. 13 shows the structure of a clamp according to the seventh embodiment of the present invention. In the clamp according to this embodiment, as shown in FIG. 13, the intersection 1 between the axis of the holder 4 and the center lines of the horizontal pipe 80 and the vertical pipe 84.
Does not match 00a. As shown in FIG. 13A, the lid 1
4 includes an upper edge 34a and a lower edge 34b of the see-through hole 34.
At a position corresponding to the center line of the vertical pipe 84 orthogonal to the horizontal pipe 80 in the vicinity of the
And 102d are provided.

FIG. 13B is a view showing a state in which the second clamp body 5 is rotated 180 ° around the axis of the holding body 4 from the state of FIG. 13A. The other pair of axial reference marks 102e and 102f are provided at positions corresponding to the center line of the vertical pipe 84 in this state.

As described above, even when the axis of the holder 4 does not coincide with the intersection 100a of the center lines of the horizontal pipe 80 and the vertical pipe 84, two pairs of axial reference marks 102 are formed.
By providing c and 102d and 102e and 102f, when the horizontal pipe 80 and the vertical pipe 84 are orthogonal to each other, the axial reference mark 10 of the two pairs of connecting clamps 2 is provided.
2c, 102d, 102e or 102f, any suitable mark, and the axial positioning mark 10 of the lateral pipe 80.
It is convenient to match 8a with the axial positioning mark 108a provided on the horizontal pipe 80 and the center line of the vertical pipe 84.

In this embodiment, the axial reference marks are 102c and 102d and 102e and 10.
Two pieces such as 2f, four pieces in total, are provided, but two pieces or one piece or another number may be provided depending on the application. Further, in the present embodiment, the axial reference marks 102c, ... Have a substantially oval shape or a circular shape as shown in FIG. 13, but may have any shape such as a line or a dot. Further, the position of the axial reference mark in the axial direction (X direction) can be provided at the center of the lid 14 in the width direction, or at any other position, in addition to the case of the present embodiment.

Next, FIG. 14C shows the structure of the marked pipe 110 which is the material to be held according to the eighth embodiment of the present invention. The marked pipe 110 has axial positioning marks 108a, 108b for axially positioning the connecting clamp 2 at a predetermined axial position on the surface.
... are provided circumferentially. Further, circumferential positioning marks 106a, 106b, ... Which position the coupling clamp 2 in the circumferential direction are provided on the surface at predetermined circumferential positions along the generatrix of the marked pipe 110.

Thus, in the pipe manufacturing process, the axial positioning marks 108a, 108b,
... or the circumferential positioning marks 106a, 106b,
Since these marks can be accurately provided by providing .., positioning at the time of assembling work of the connecting clamp 2 to the marked pipe 110
It can be done accurately and easily. Also, at the pipe assembly site, the axial positioning mark 1
08a, ... Or the circumferential positioning marks 106a, ... Are not required, so that the assembling period can be shortened.

The above-mentioned axial positioning marks 108a, 1
08b, ... Or circumferential positioning marks 106a, 1
06b, ... Are provided on the surface of the marked pipe 110 by a method such as printing, or are provided in a concave shape on the surface of the marked pipe 110 as shown in FIG. May be. In the case of a pipe having a drawing process, it is preferable to provide concave or convex circumferential positioning marks 106a, 106b, ... In the drawing process.

Incidentally, the axial positioning marks 108a, 1
08b, ... Or circumferential positioning marks 106a, 1
06b, ... Can be provided in a predetermined position and in a predetermined number as appropriate, and the position and the number are not limited. Also, the axial positioning marks 108a, 108b, ... Or
Either one of the circumferential positioning marks 106a, 106b, ... Can be provided.

Further, as shown in FIG. 14D, the axial positioning marks 108a, 108b, ... And the circumferential positioning marks 106a, 106b ,.
It is also possible to provide so as to form a + "-shaped mark, or as shown in FIG. 14E, to provide a dot-shaped mark at the intersection thereof.

Further, as shown in FIG. 14F, these marks may be provided in a stepped shape. The embodiment of FIG. 14F is suitable for positioning when the connecting clamp 2 is spirally attached to the marked pipe 110.

Next, FIG. 15 shows the construction of a marked pipe 110 which is a material to be held according to a ninth embodiment of the present invention. The pipe 110 with marks has circumferential positioning marks 106a, 106 for positioning the connecting clamp 2 in the circumferential direction at positions on both sides of the diameter D2 on the surface.
b is provided along the generatrix of the marked pipe 110.

In the vicinity of the end of the marked pipe 110,
Positioning pin 112 having another diameter D1 as an axis is provided. Further, the circumferential positioning marks 106a, 1
The diameter D2 passing through 06b and the diameter D1 forming the axis of the positioning pin 112 are formed so as to be orthogonal to each other.

A method of using the marked pipe 110 is shown in FIG. In FIG. 16A, 114 is a general single pipe joint for connecting round pipes.
The single pipe joint 114 includes a collar 114b and a pair of pipe insertion portions 11 continuously provided on the collar 114b.
4a, a pair of pin engaging portions 114c provided near the end of the pipe inserting portion 114a. The pair of pin engaging portions 114c includes the two positioning pins 1 of the two marked pipes 110 to be connected.
12 are formed so as to be in the same direction in the engaged state.

When connecting two marked pipes 110, the pipe insertion portion 114a of the single pipe joint 114 is
It is inserted into the inner diameter of the marked pipe 110, and the alignment pin 112 of the marked pipe 110 is rotated so as to engage with the pin engaging portion 114c of the single pipe joint 114.

Thus, as described above, the two positioning pins 112 of the two marked pipes 110 to be connected are in the same direction. Therefore, from the relationship between the diameter D1 forming the axis of the positioning pin 112 and the diameter D2 passing through the circumferential positioning marks 106a and 106b (see FIG. 15B described above), two connected pins are connected as shown in FIG. 16B. The circumferential positioning marks 106a and 106b of the marked pipe 110 are located on a straight line.

Therefore, when the marked pipe 110 according to the present embodiment is used, even when two or more pipes are connected, the clamp 2 is attached to the marked pipe 110 as in the case of one pipe. When working,
Positioning of the clamp 2 in the circumferential direction with respect to the marked pipe 110 can be performed accurately and easily by visual observation.

In this embodiment, as shown in FIG. 15B, the diameter D2 passing through the circumferential positioning marks 106a and 106b and the diameter D1 forming the axis of the positioning pin 112 are formed so as to be orthogonal to each other. However, if the angles are constant, they do not necessarily need to be orthogonal.

In this embodiment, two circumferential positioning marks are provided (106a and 106b), but one or three or more may be provided. However, when a plurality of circumferential positioning marks are provided, as shown in the present embodiment, if they are provided at positions to be rotated by 180 °, the diameter D1 forming the axis of the positioning pin 112 is 180 °. Even when rotated, the circumferential positioning marks of the two marked pipes 110 to be connected are each positioned on a straight line. For this reason, it is not necessary to consider the mutual angular relationship between the two marked pipes 110 at the time of connection, which is convenient.

Further, in this embodiment, the diameter D2 passing through the circumferential positioning marks 106a and 106b and the diameter D1 forming the axis of the positioning pin 112 are formed to have the same angle (90 °). The case where two or more marked pipes 110 are connected has been shown. D1 and D2
Two or more marked pipes 11 with different angles
When 0s are connected, the circumferential positioning marks 106a of the plurality of marked pipes 110 can be connected so as to form, for example, a step shape.

Next, FIG. 17 shows the structure of the inner expansion joint 120 according to the tenth embodiment of the present invention. The inner expansion joint 120 includes an upper body 122, a lower body 124, a collar 128, and a tightening bolt 126.

The tightening bolt 126 has a head portion 126c provided at one end, a screw portion 126a provided continuously with the head portion 126c, and a pressing portion 126b provided continuously with the screw portion 126a at the other end.

The upper body 122 has a substantially semicylindrical cross section (see FIG. 17B), and the upper body base 122a into which the screw portion 126a of the tightening bolt 126 is screwed and the upper body base 1 are formed.
22a and a first upper body pipe inserting portion 122b and a second upper body pipe inserting portion 122c, which extend in a straight line from the upper body base portion 122a in two directions and are inserted into the inner diameters of the different marked pipes 110, respectively. have.

The pipe insertion length L1 of the first upper body pipe insertion part 122b is based on the diameter of one of the marked pipes 110 provided in the vicinity of the end of the marked pipe 110 from the end of the marked pipe 110. Positioning pin 1
It is formed so that the distance LP up to 12 is not exceeded.
Further, the contact portion of the first upper body pipe insertion portion 122b with the inner surface of the marked pipe 110 is subjected to anti-slip processing 122e such as knurling in order to prevent sliding with the inner surface of the marked pipe 110. There is. The end of the second upper body pipe insertion portion 122c is provided with the marked pipe 11
The positioning pin 112 of 0 is reached, and the U-shaped engaging portion 122d is formed to engage with the positioning pin 112 (see FIG. 17C). This prevents the inward expansion joint 120 and the marked pipe 110 from accidentally rotating when connected to the marked pipe 110.

The lower body 124 has a substantially semicylindrical cross section (see FIG. 17B), and has a lower body base portion 124a having a pressed portion 124f that comes into contact with the pressing portion 126b of the tightening bolt 126 and a continuous lower body base portion 124a. Lower body base 1
24a and a first lower body pipe inserting portion 124b and a second lower body pipe inserting portion 124c, which extend in a straight line in two directions and are inserted into the inner diameters of different marked pipes 110 respectively.
And have.

The pipe insertion length L2 of the first lower body pipe insertion portion 124b is formed so as not to exceed the distance LP, like the pipe insertion length L1 of the first upper body pipe insertion portion 122b. Further, like the first upper body pipe inserting portion 122b, the non-slip processing 124e is applied to the contact portion of the first lower body pipe inserting portion 124b with the inner surface of the marked pipe 110.

The second lower body pipe inserting portion 124c has the same structure as the second upper body pipe inserting portion 122c, and has a U-shaped end portion.
A character-shaped engaging portion 124d is formed (see FIG. 17C).

The collar 128 has a substantially cylindrical shape, and is configured so that the upper body base 122a and the lower body base 124a are loosely fitted to the inner surface 128b of the cylinder. Further, a bolt insertion hole 128a into which the screw portion 126a of the tightening bolt 126 is loosely fitted is provided at the center of one side of the cylindrical surface.

A method of using the inner expansion joint 120 will be described with reference to FIG. First, tightening bolt 1
26 is loosened and the tension F is set smaller than the inner diameter of the marked pipe 110.

Next, the second upper body pipe inserting portion 122c and the second lower body pipe inserting portion 124c are inserted into the inner diameter of the one marked pipe 110. At this time, the U-shaped engaging portion 1
22d and 124d adjust the rotational position of the inner expansion joint 120 so that it engages the alignment pin 112 of the marked pipe 110.

Next, the first upper body pipe inserting portion 122b and the first lower body pipe inserting portion 124b are inserted into the inner diameter of the other marked pipe 110. At this time, the circumferential positioning marks 106 of the two marked pipes 110 to be connected
so that a or 106b forms a straight line (see FIG. 16B),
The rotational position of the other marked pipe 110 is adjusted.
In this case, the pipe insertion lengths L1 and L2 of the first upper body pipe inserting portion 122b and the first lower body pipe inserting portion 124b.
Is smaller than the distance LP, the positioning pin 112
There is no hit.

Next, by tightening the tightening bolt 126, the tension dimension F is increased. Due to the increase in the tension size F, the inner diameter of the one marked pipe 110, the second upper body pipe inserting portion 122c, and the second lower body pipe inserting portion 1
24c comes into contact with one of the marked pipes 110,
Tightening bolt 12 between inner expansion joint 120
A frictional force corresponding to the tightening amount of 6 is generated. Similarly, the other marked pipe 110 and the inner expansion joint 120
A frictional force also occurs between and. In this way, the two marked pipes 110 can be connected at any rotation position.

As described above, if the inner expansion joint 120 according to this embodiment is used, two or more marked pipes 1
When 10 are connected, the marked pipe 110 can be connected regardless of the angle between the alignment pins 112.

Therefore, even when the angular relationship between the positioning pin 112 and the circumferential positioning marks 106a and 106b is not constant, the two marked pipes 110 are not shown.
The positional relationship between the circumferential positioning marks 106a and 106b can be set to a desired value. For this reason, when connecting two or more marked pipes 110,
When the clamp 2 is assembled to the marked pipe 110, the clamp 2 can be accurately and easily positioned in the circumferential direction with respect to the marked pipe 110.

In this embodiment, only the pipe insertion lengths L1 and L2 of the first upper body pipe inserting portion 122b and the first lower body pipe inserting portion 124b are formed to be smaller than the distance LP. One body pipe insertion part 122b
And the pipe insertion length L of the first lower body pipe insertion portion 124b
1 and L2, and both the pipe insertion lengths of the second upper body pipe inserting portion 122c and the second lower body pipe inserting portion 124c may be formed to be smaller than the distance LP.

Further, in the present embodiment, the slip prevention processing 122e and 124e are applied only to the contact portions of the first upper body pipe inserting portion 122b and the first lower body pipe inserting portion 124b. The contact portions of the body pipe insertion portion 122c and the second lower body pipe insertion portion 124c may be similarly subjected to the slip prevention processing, and conversely, the contact portions may not be subjected to the slip prevention processing. However, by applying anti-slip processing, two marked pipes 1
Since the binding force of 10 can be made stronger, it is preferable in terms of safety.

Next, FIG. 7 shows the structure of a clamp according to an eleventh embodiment of the present invention. The clamp according to this embodiment is one in which the present invention is applied to a pin clamp 7 having one clamp body 9 and one pin 11. Like the first embodiment, the lid 14 of the pink lamp 7 is provided with a see-through hole 34 near the center of the lid-side holding portion 32 in the width direction.

The present invention is not limited to the above-mentioned embodiments, but is applicable to all clamps having one or more clamp bodies, such as triple clamps. Further, in each of the above-described embodiments, the case where the held material is a single round pipe has been described, but the present invention is not limited to this, and an elliptical pipe, a hexagonal pipe, a square pipe, a double pipe, It is applicable to all materials to be held such as solid columns.

Further, in each of the above-described embodiments, the case where the main body 12 of the clamp is integrally formed is described, but the present invention is not limited to this, and FIG.
As shown in FIG. 8, the present invention is also applied to a clamp in which the main body 12 is divided into two main body main portions 12a and main body auxiliary portions 12b. The main body main portion 12a and the main body auxiliary portion 12b are swingably supported by a support pin 130. A T-shaped bolt 18 is swingably supported on the main body auxiliary portion 12b. In addition, the lid 14 is attached to the main body portion 12a.
6, it is swingably supported. In this case,
In FIG. 8, the circular arc dimension S1 of the main body auxiliary portion 12b and the circular arc dimension S2 of the lid body 14 are formed to be equal, but the circular arc dimension S1 of the main body auxiliary portion 12b is larger than the circular arc dimension S2 of the lid body 14. May be formed to be larger or smaller. Further, the main body 12 may have two or more main body auxiliary portions 12b.

[0162]

According to the clamp of the first aspect, the see-through hole is provided near the center in the width direction of the main body side holding portion or the lid side holding portion.

That is, when this clamp is used for holding a pipe or the like, the positioning mark provided on the surface of the material to be held such as the pipe can be easily visually recognized through the see-through hole. Therefore, the positioning of the clamp with respect to the material to be held can be accurately and easily performed visually.

In the clamp according to the second aspect, the measuring engagement portion is provided continuously with the transparent through hole or in the vicinity of the transparent through hole at approximately the center in the width direction of the transparent through hole.

That is, the positioning mark provided on the surface of the material to be held can be easily visually recognized through the see-through hole, and the measurement engaging portion is provided with an L-shaped end portion such as a tape measure. Can be locked. Therefore, the clamps can be positioned accurately and easily by visual inspection, and when fastening a plurality of clamps to the material to be held, the clamps should be positioned more accurately using a tape measure or the like. You can

In the clamp of the third aspect, the measurement engaging portion is provided on at least one of the upper edge and the lower edge of the see-through hole, and extends outward from the see-through hole through the see-through hole. Is also formed in a thin groove continuously with the see-through hole.

That is, by inserting the L-shaped end portion of the tape measure or the like into the thin groove-shaped engagement portion for measurement, the L-shaped end portion of the tape measure or the like can be reliably locked. Therefore, when the clamp is positioned by a tape measure or the like, it can be performed more accurately.

In the clamp of claim 4, the measuring engagement portion is provided in the vicinity of at least one of the upper edge and the lower edge of the see-through hole, and is arranged in a direction orthogonal to the width direction of the see-through hole. The groove is thinner than the see-through hole and is formed independently of the see-through hole.

That is, it is possible to provide a groove-shaped measuring engaging portion while imparting a certain strength to the main body or the lid.
Therefore, even if the clamp is required to have a certain strength, the clamp can be accurately positioned using a tape measure or the like.

In the clamp of the fifth aspect, the measurement engaging portion is provided on at least one of the upper edge and the lower edge of the see-through hole, and is formed in a convex shape toward the inside of the see-through hole. There is.

That is, even if the space of the see-through hole is limited, the measuring engagement portion can be provided. Therefore, even if the size of the clamp is limited, the clamp can be positioned using a tape measure or the like.

The clamps according to claims 6 and 16 have an axial reference mark on at least one of the upper edge and the lower edge of the see-through hole, continuously with the see-through hole, or near the see-through hole. Is provided.

That is, the axial positioning mark provided on the surface of the object to be held and the axial reference mark provided on the clamp can be easily visually matched through the see-through hole. Therefore, the axial positioning of the clamp with respect to the material to be held can be more accurately and easily performed by visual inspection.

The clamp of claim 7 is characterized in that the main body, the lid or the fastening means is provided with a measuring engaging portion having a longitudinal direction in a direction orthogonal to the width direction of the main body or the lid.

That is, an L-shaped end portion such as a tape measure can be locked to the measurement engaging portion. Therefore, even if the material to be held is not provided with a positioning mark, the clamp can be accurately positioned using a tape measure or the like.

The clamps of claims 8 and 20 are characterized in that the fastening means includes a T-shaped bolt, and the measuring engagement portion is provided at the tip end of the T-shaped bolt on the screw portion side.

That is, it is possible to provide the measurement engaging portion while minimizing the change of the parts. Therefore, the clamp can be accurately positioned using a tape measure or the like without requiring a large change in the parts.

The clamps of claims 9 and 21 are characterized in that a circumferential reference mark is provided in the main body side holding portion or the lid side holding portion in the vicinity of the exposed portion of the held material.

That is, the circumferential positioning mark provided on the surface of the material to be held and the circumferential reference mark provided on the clamp can be easily visually matched.
Therefore, the positioning of the clamp with respect to the material to be held in the circumferential direction can be accurately and easily performed visually.

The clamps according to claim 10 and claim 22,
It is characterized in that the circumferential reference mark is provided in the vicinity of a position facing the front surface of the material to be held when the clamp is attached to the material to be held. That is, when the circumferential positioning mark is provided on the front surface of the material to be held during the assembling work, the circumferential positioning mark and the circumferential reference mark of the clamp can be easily visually matched.
Therefore, when the clamp is assembled to the material to be held, the clamp can be accurately and easily positioned in the circumferential direction with respect to the material to be held.

In the clamp according to the eleventh aspect, the see-through hole is formed in the main body side holding portion of the first main body or the second main body, or the lid side holding portion of the first lid or the second lid. It is provided near the center in the width direction.

That is, when this clamp is used for connecting pipes or the like, a positioning mark provided on at least one surface of the first held material such as a horizontal pipe or the second held material such as a vertical pipe is It can be easily visually recognized through the see-through hole. Therefore, the positioning of the second object to be held with respect to the first object to be held can be accurately and easily performed visually.

According to the twelfth aspect of the present invention, the measurement engaging portion is provided substantially continuously with or in the vicinity of the see-through hole at the widthwise center of the see-through hole.

That is, the positioning mark provided on at least one surface of the first to-be-held material or the second to-be-held material can be easily visually recognized through this transparent through hole, and the measurement can be performed. An L-shaped end portion such as a tape measure can be locked to the engaging portion for use. Therefore, the positioning of the second object to be held with respect to the first object to be held can be performed accurately and easily by visual recognition, and for example, a plurality of second objects to be held can be attached to the first object to be held. In the case of fastening, positioning of the second materials to be held can be performed more accurately by using a tape measure or the like.

In the clamp according to the thirteenth aspect, the measuring engagement portion is provided on at least one of the upper edge and the lower edge of the see-through hole, and the measuring engaging portion extends outward from the see-through hole. Is also formed in a thin groove continuously with the see-through hole.

That is, a thin groove-shaped measuring engaging portion formed continuously with a see-through hole provided in at least one of the first holding portion and the second holding portion has a tape measure or the like L. By inserting the L-shaped end portion, the L-shaped end portion of the tape measure or the like can be reliably locked. Therefore, when the second to-be-held materials are positioned relative to each other by a tape measure or the like, the positioning can be performed more accurately.

In the clamp of the fourteenth aspect, the measuring engagement portion is provided in the vicinity of at least one of the upper edge and the lower edge of the see-through hole, and in the direction orthogonal to the width direction of the see-through hole. The groove is thinner than the see-through hole and is formed independently of the see-through hole. That is, it is possible to provide the groove-shaped measuring engagement portion while imparting a certain strength to the main body or the lid. Therefore, even when the clamp is required to have a certain strength, it is possible to accurately position the second materials to be held together by using a tape measure or the like.

In the clamp of the fifteenth aspect, the measuring engagement portion is provided on at least one of the upper edge and the lower edge of the see-through hole, and is formed in a convex shape toward the inside of the see-through hole. There is.

That is, even when the space of the see-through hole provided in at least one of the first holding portion and the second holding portion is limited, the measurement engaging portion can be provided. . Therefore, even when the size of the clamp is limited, it is possible to use the tape measure or the like to position the second held members relative to each other.

A clamp according to a seventeenth aspect is the clamp according to the sixteenth aspect, characterized in that the axial reference mark is provided substantially at the center in the width direction of the see-through hole.

That is, the axial positioning mark provided on the surface of the material to be held and the approximate center in the width direction of the clamp are
It can be easily visually matched. Therefore, the axial positioning of the clamp with respect to the material to be held,
It can be performed more accurately and easily by visual recognition with the center of the width of the clamp as a reference.

According to a eighteenth aspect of the present invention, in the clamp of the sixteenth aspect, the axial reference mark is provided on the first main body or the first lid body, and the first held material and the second held object are held. In the vicinity of the position corresponding to the center line of the second object to be held when the members are orthogonal to each other, or on the second main body or the second lid, the first object to be held and the second object to be held. It is characterized in that it is provided near the position corresponding to the center line of the first object to be held when the object to be held is orthogonal. That is, by aligning the axial reference mark of the clamp with the axial positioning mark provided on the surface of the material to be held, when viewed from the direction of the perpendicular line common to two orthogonal materials to be held, the material to be held is held. It is possible to match the axial positioning mark provided on the surface of the and the center line of the material to be held which is orthogonal to the axial positioning mark. Therefore, since the center line of the object to be held in the assembly drawing of the object to be held coincides with the axial positioning mark on the surface of the object to be held perpendicular to this, the positioning of the objects to be held should not be done. It can be performed more accurately and easily with reference to the drawings. The clamp according to claim 19 is the first main body, the first lid or the first fastening means, or the second main body or the first fastening means with the longitudinal direction being a direction orthogonal to the width direction of the first main body or the first lid. The main body or the second lid is provided with a measuring engagement portion in the second main body, the second lid or the second fastening means with the direction orthogonal to the width direction being the longitudinal direction. .

That is, an L-shaped end portion such as a tape measure can be locked to the measurement engaging portion. Therefore, even when the material to be held is not provided with a positioning mark, the second material to be held can be accurately positioned using the tape measure or the like.

According to a twenty-third aspect of the present invention, there is provided the clamp according to the twenty-first aspect, wherein the circumferential reference mark is provided on the first main body or the first lid, and the first object to be held and the second object to be held are held. In the vicinity of the position corresponding to the center line of the first object to be held when the members are orthogonal to each other, or on the second main body or the second lid, the first object to be held and the second object to be held. It is characterized in that it is provided near the position corresponding to the center line of the second object to be held when the object to be held is orthogonal. That is, by aligning the circumferential reference mark of the clamp with the circumferential positioning mark provided on the surface of the material to be held, when viewed from the direction of the perpendicular line common to two orthogonal material to be held, the material to be held is held. The circumferential positioning mark provided on the surface of the object can be aligned with the center line of the material to be held. Therefore, since the center line of the material to be held in the assembly drawing of the material to be held and the circumferential positioning mark on the surface of the material to be held are aligned, refer to the assembly drawing for the mutual positioning of the material to be held. In addition, it can be performed more accurately and easily.

According to a twenty-fourth aspect of the present invention, in the clamp according to the twenty-first aspect, the axis of the holding body that rotatably holds the first main body and the second main body intersects the first held material and the second held material. It is characterized in that it is formed so as to pass in the vicinity of the intersection of the respective center lines. That is, even when the first held material and the second held material intersect at any angle, they always intersect at a specific point. Therefore, it is possible to accurately and easily position the objects to be held together.

According to a twenty-fifth aspect of the present invention, there is provided a material to be held which is provided with one or more axial positioning marks for axially positioning the clamp at a predetermined axial position on the surface or in the circumferential direction on the surface. Is provided with one or more circumferential positioning marks for positioning the clamp in the circumferential direction. That is, in the manufacturing process of the material to be held, the axial positioning mark or the circumferential positioning mark can be provided in advance. Therefore, since the axial positioning mark or the circumferential positioning mark can be accurately provided, the clamp can be accurately and easily positioned with respect to the object to be held during the work of assembling the clamp to the object to be held. You can Also,
Since it is not necessary to provide the axial positioning mark or the circumferential positioning mark at the assembly site of the material to be held, the assembly period can be shortened.

According to a twenty-sixth aspect of the present invention, there is provided a held-to-be-held material according to the twenty-fifth aspect in which the held-to-be-held material is a pipe, and a positioning pin having a diameter of one of the pipes as an axis is provided near an end of the pipe. And the angle formed by the straight line connecting the circumferential positioning mark and the center of the pipe and the one diameter is set to a predetermined value. That is, when two or more pipes are connected, a constant angular relationship can be established between the respective circumferential positioning marks by providing a constant angular relationship between the respective positioning pins. Therefore, even when two or more pipes are connected, the clamp can be accurately and easily positioned in the circumferential direction with respect to the pipe during the assembling work of the clamp to the pipe.

According to a twenty-seventh aspect of the present invention, in the inner expansion joint, the pipe insertion length of at least one of the upper body pipe insertion portion and the lower body pipe insertion portion of the pipe provided from the end portion of the pipe to the end portion of the pipe is provided. It is characterized in that it is formed so as not to exceed the distance to the positioning pin with the diameter of one as the axis. That is, when connecting two or more pipes, the pipes can be connected regardless of the angle between the positioning pins. Therefore, when the pipe is provided with the circumferential positioning marks, the positional relationship between the circumferential positioning marks can be set to a desired value even if the angular relationship between the alignment pins and the circumferential positioning marks is not constant. it can. Therefore, when connecting two or more pipes, the clamp can be accurately and easily positioned in the circumferential direction with respect to the pipe when the clamp is assembled to the pipe.

[Brief description of drawings]

FIG. 1 is a plan view and a rear view of a clamp according to a first embodiment of the present invention.

FIG. 2 is a right side view and a bottom view of the clamp according to the first embodiment of the present invention.

FIG. 3 is a plan view of a clamp according to a second embodiment of the present invention.

4A and 4B are a JJ sectional view and a KK sectional view, respectively, of a lid of a clamp according to a second embodiment of the present invention.

FIG. 5 is a plan view of a clamp according to a third embodiment of the present invention.

FIG. 6 is a plan view of a clamp according to a fourth embodiment of the present invention.

FIG. 7 is a perspective view of a clamp according to an eleventh embodiment of the present invention.

FIG. 8 is a perspective view of a conventional clamp.

FIG. 9 is an explanatory diagram when a conventional clamp is used for assembling work of a temporary scaffold.

FIG. 10 and

FIG. 11 is a view showing a structure of a clamp according to a fifth embodiment of the present invention.

FIG. 12 is a drawing showing a structure of a clamp according to a sixth embodiment of the present invention.

FIG. 13 is a view showing a structure of a clamp according to a seventh embodiment of the present invention.

FIG. 14 is a drawing showing the construction of a marked pipe according to an eighth embodiment of the present invention.

FIG. 15 is a drawing showing the construction of a marked pipe according to a ninth embodiment of the present invention.

FIG. 16 is a view showing a method of using the marked pipe according to the ninth embodiment of the present invention.

FIG. 17 is a drawing showing the construction of an inner expansion joint according to the tenth embodiment of the present invention.

FIG. 18 is a view showing the configuration of another clamp to which the present invention is applied.

[Explanation of symbols]

 2 ... Connection clamp 14 ... Lid body 32 ... Lid body side holding part 34 ... Perforation through hole 80 ... Horizontal pipe 80a ... Positioning mark

Claims (27)

[Claims] 1. A main body having a main body side holding portion, a lid body having a lid side holding portion for holding a material to be held in cooperation with the main body side holding portion, and the main body and the lid body being openably and closably coupled. A coupling means, a fastening means for fastening the main body and the lid body with the material to be held sandwiched therebetween, wherein the body-side holding portion or the lid-side holding portion is transparent in the vicinity of the center in the width direction. A clamp characterized by having a through hole. 2. The clamp according to claim 1, wherein a measuring engagement portion is provided at a substantially central portion in the width direction of the see-through hole, continuously with the see-through hole or in the vicinity of the see-through hole. What is characterized by. 3. The clamp according to claim 2, wherein the measuring engagement portion is provided on at least one of an upper edge and a lower edge of the see-through hole, and the measuring engaging portion is provided toward the outside of the see-through hole. It is formed in a groove shape narrower than the see-through hole, and is formed continuously with the see-through hole. 4. The clamp according to claim 2, wherein the measuring engagement portion is provided in the vicinity of at least one of an upper edge and a lower edge of the see-through hole, and is orthogonal to a width direction of the see-through hole. Is formed in a groove shape narrower than the see-through through-hole in the direction of rotation, independently of the see-through through-hole. 5. The clamp according to claim 2, wherein the measurement engaging portion is provided on at least one of an upper edge and a lower edge of the see-through hole, and has a convex shape inwardly of the see-through hole. It is characterized by being formed in. 6. The clamp according to claim 1, wherein at least one of an upper edge and a lower edge of the see-through hole is provided.
An axial reference mark is provided continuously to the transparent through hole or in the vicinity of the transparent through hole. 7. A main body having a main body side holding portion, a lid body having a lid side holding portion for holding a material to be held in cooperation with the main body side holding portion, and the main body and the lid body being openably and closably coupled. A coupling means, a fastening means for fastening the main body and the lid body with the material to be held sandwiched therebetween, wherein the body, the lid body or the fastening means is provided with a width direction of the body or the lid body. A clamp provided with a measuring engaging portion having a longitudinal direction in a direction orthogonal to the clamp. 8. The clamp according to claim 7, wherein the fastening means includes a T-shaped bolt, and the engagement portion for measurement is provided at a tip end of the T-shaped bolt on a screw portion side. thing. 9. A main body having a main body side holding portion, a lid body having a lid side holding portion for holding a material to be held in cooperation with the main body side holding portion, and connecting the main body and the lid body in an openable and closable manner. A clamp comprising: a coupling means; a fastening means for fastening the main body and the lid body with each other by sandwiching the held material between the main body side holding portion and the lid body side holding portion in the vicinity of an exposed portion of the held material. The clamp is characterized in that it has a circumferential reference mark. 10. The clamp according to claim 9, wherein the circumferential reference mark is provided in the vicinity of a position facing the front surface of the object to be held when the clamp is attached to the object to be held. Characterized by. 11. A first main body having a main body side holding portion, a first lid body having a lid side holding portion for holding a first held material in cooperation with the main body side holding portion, and the first main body. A first connecting means for connecting the main body and the first lid so as to be openable and closable; a first connecting means for fastening the first main body and the first lid with the first object to be held sandwiched therebetween; A second main body having a fastening means, a main body side holding portion, and rotatably or fixedly held with respect to the first main body, and a second held material in cooperation with the main body side holding portion. A second lid having a lid-side holding portion that holds the second lid, a second connecting unit that opens and closes the second main body and the second lid, and the second main body and the second lid. A second fastening means for fastening the body to the body while sandwiching the second material to be held, wherein the first main body or the front body A clamp having a through-hole for see-through near the center in the width direction of the body-side holding portion of the second body or the lid-side holding portion of the first lid or the second lid. . 12. The clamp according to claim 11, wherein a measuring engagement portion is provided continuously with the transparent through hole or in the vicinity of the transparent through hole at a substantially central portion in the width direction of the transparent through hole. What is characterized by. 13. The clamp according to claim 12, wherein the measuring engagement portion is provided on at least one of an upper edge and a lower edge of the see-through hole, and the measuring engaging portion is provided toward the outside of the see-through hole. It is formed in a groove shape narrower than the see-through hole, and is formed continuously with the see-through hole. 14. The clamp according to claim 12, wherein the measurement engaging portion is provided in the vicinity of at least one of an upper edge and a lower edge of the see-through hole, and is orthogonal to a width direction of the see-through hole. Is formed in a groove shape narrower than the see-through through-hole in the direction to be formed, independently of the see-through through-hole. 15. The clamp according to claim 12, wherein the measurement engaging portion is provided on at least one of an upper edge and a lower edge of the see-through hole, and is convex toward the inside of the see-through hole. It is characterized by being formed in. 16. The clamp according to claim 11, wherein at least one of an upper edge and a lower edge of the see-through hole is provided.
An axial reference mark is provided continuously to the transparent through hole or in the vicinity of the transparent through hole. 17. The clamp according to claim 16, wherein the axial reference mark is provided substantially at the center in the width direction of the see-through hole. 18. The clamp according to claim 16, wherein the axial reference mark is provided on the first main body or the first lid body, and the first held material and the second held object. In the vicinity of the position corresponding to the center line of the second held material when the materials are orthogonal to each other, or on the second main body or the second lid, and the first held material It is provided in the vicinity of a position corresponding to the center line of the first object to be held when the second object to be held is orthogonal to each other. 19. A first main body having a main body side holding portion, a first lid body having a lid side holding portion for holding the first held material in cooperation with the main body side holding portion, and the first main body having the main body side holding portion. A first connecting means for connecting the main body and the first lid so as to be openable and closable; a first connecting means for fastening the first main body and the first lid with the first object to be held sandwiched therebetween; A second main body having a fastening means, a main body side holding portion, and rotatably or fixedly held with respect to the first main body, and a second held material in cooperation with the main body side holding portion. A second lid having a lid-side holding portion that holds the second lid, a second connecting unit that opens and closes the second main body and the second lid, and the second main body and the second lid. A second fastening means for fastening the body to the body while sandwiching the second material to be held, wherein the first main body or the front body The first main body, the first lid or the first fastening means, or the second main body or the second lid, with the direction orthogonal to the width direction of the first lid being the longitudinal direction. A clamp having a measurement engaging portion provided on the second main body, the second lid body, or the second fastening means with a direction orthogonal to the width direction of the body as a longitudinal direction. 20. The clamp according to claim 19, wherein at least one of the first fastening means or the second fastening means comprises a T-bolt, and the measuring engagement portion is provided on the T-bolt. At least one of them is provided at the tip of the screw side. 21. A first main body having a main body side holding portion, a first lid body having a lid side holding portion for holding a first held material in cooperation with the main body side holding portion, and the first A first connecting means for connecting the main body and the first lid so as to be openable and closable; a first connecting means for fastening the first main body and the first lid with the first object to be held sandwiched therebetween; A second main body having a fastening means, a main body side holding portion, and rotatably or fixedly held with respect to the first main body, and a second held material in cooperation with the main body side holding portion. A second lid having a lid-side holding portion that holds the second lid, a second connecting unit that opens and closes the second main body and the second lid, and the second main body and the second lid. A second fastening means for fastening the body to the body while sandwiching the second material to be held, wherein the body-side sandwich of the first body is provided. Part or the exposed side of the first held material of the lid side holding part of the first lid, or the main body side holding part of the second main body or the lid side holding part of the second lid. 2. A clamp in which a circumferential reference mark is provided in the vicinity of the exposed portion of the second object to be held. 22. The clamp according to claim 21, wherein the circumferential reference mark is mounted on the first main body or the first lid, and the clamp is attached to the first held material. It is provided in the vicinity of a position facing the front surface of the first held material at the time of working, or on the second main body or the second lid, and the second held material of the clamp. It is provided in the vicinity of a position facing the front surface of the second object to be held during the assembling work. 23. The clamp according to claim 21, wherein the circumferential reference mark is provided on the first main body or the first lid body, and the first held material and the second held object. In the vicinity of the position corresponding to the center line of the first held material when the materials are orthogonal, or on the second main body or the second lid, and the first held material It is provided in the vicinity of a position corresponding to the center line of the second object to be held when the second object to be held is orthogonal. 24. A first main body having a main body side holding portion, a first lid body having a lid side holding portion for holding the first held material in cooperation with the main body side holding portion, and the first A first connecting means for connecting the main body and the first lid so as to be openable and closable; a first connecting means for fastening the first main body and the first lid with the first object to be held sandwiched therebetween; Fastening means, a second main body having a main body side holding portion and rotatably held with respect to the first main body, a lid side for holding a second held material in cooperation with the main body side holding portion. A second lid having a holding part, a second coupling means for coupling the second main body and the second lid so as to be openable and closable, the second main body and the second lid A second fastening means for fastening by sandwiching a second held material, wherein the first main body and the second main body are rotated. It is characterized in that the axis of the holding body that can be held is formed so as to pass near the intersection of the respective center lines when the first held material and the second held material intersect each other. Clamp. 25. A main body having a main body side holding portion, a lid body having a lid body side holding portion, a coupling means for connecting the main body and the lid body in an openable and closable manner, and a fastening means for fastening the main body and the lid body. In the material to be held by the clamp, the one or more axial positioning marks for axially positioning the clamp are provided at a predetermined position in the axial direction on the surface, or on the surface. And a circumferential positioning mark for positioning the clamp in the circumferential direction at a predetermined position in the circumferential direction. 26. The material to be held according to claim 25, wherein the material to be held is a pipe, and a positioning pin having one diameter of the pipe as an axis is provided near an end of the pipe. An angle formed by the straight line connecting the circumferential positioning mark and the center of the pipe and the one diameter is set to a predetermined value. 27. A tightening bolt having a head provided at one end, a screw portion continuously provided at the head, and a pressing portion continuously provided at the other end at the screw portion, An upper body base portion into which the screw portion is screwed, and two upper body pipe insertion portions which are continuously extended from the upper body base portion in two directions in a straight line from the upper body base portion and are inserted into inner diameters of two pipes. An upper body having a lower body base portion that comes into contact with the pressing portion of the tightening bolt, and two continuous body extending from the lower body base portion in two directions in a straight line and inserted into the inner diameters of the two pipes. A lower body having a lower body pipe insertion portion, which is substantially cylindrical, in which the upper body base and the lower body base are loosely fitted to the inner surface of the cylinder, and the threaded portion of the tightening bolt is loosely fitted to the center of one side of the cylindrical surface. Collar with a bolt insertion hole In the inner expansion joint provided with, the pipe insertion length of at least one of the upper body pipe insertion portion and the lower body pipe insertion portion, the pipe provided from the end portion of the pipe in the vicinity of the end portion of the pipe The inner expansion joint is characterized in that it is formed so as not to exceed the distance to the positioning pin centered on the diameter of one.