JP2022129468A - Single pipe gripping structure, single pipe clamp and footboard - Google Patents

Abstract

To provide a single pipe gripping structure, a single pipe clamp, and a footboard that can orient a single pipe in any direction, and can be temporarily fixed so that the direction of the single pipe can be changed, or can be permanently fixed so that the direction of the single pipe is not changed.SOLUTION: In a gripper for gripping a single pipe, the single pipe presses a rotary shaft portion through a holding portion, and a pressing portion of the rotary shaft portion presses a gripping member so as to temporarily fix a direction of the single pipe in a fine-tunable manner in a state where the holding portion included in the rotary shaft portion rotatably inserted into the gripping member forming the gripper is brought into contact with the single pipe and the gripper is slightly fastened; and not only the single pipe presses the gripping member via the rotary shaft portion but also the gripping member warps so as to widely contact with the single pipe so as to perform permanent fixation where the rotary shaft portion cannot be rotated in a state where the gripper is fastened.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a single pipe holding structure, a single pipe clamp, and a footboard for holding a temporary single pipe. Specifically, it is a single pipe gripping structure for gripping a temporary steel pipe with a circular cross section called a single pipe, which can be oriented in any direction, and a gripping member that grips the single pipe. Depending on the degree of tightening of the tightening means, the single pipe can be temporarily fixed so that the direction of the single pipe can be changed, or fixed so that the direction of the single pipe does not change (hereinafter referred to as permanent fixation). It relates to a gripping structure, a single tube clamp and a tread.

Conventionally, single pipes have been used as vertical members, horizontal members or oblique members, and connected by single pipe clamps to construct temporary scaffolds for construction work and the like. The single tube clamp consists of a pair of grippers whose backs are connected together, each gripping body grips a single tube, and the single tubes that are lined up are connected.

A single tube clamp in which the angle of intersection of the two gripped single tubes is orthogonal is called an orthogonal clamp, and a single tube clamp in which the angle of intersection of the two gripped single tubes is not fixed is called a universal clamp. ing. In order to cross two single pipes held by a universal clamp at a predetermined angle, a single pipe forming an oblique member is connected to the two single pipes and fixed so that the predetermined angle does not change. .

In Patent Document 1, in order to solve the problem that the assembly work at the site and the storage management of the single tube clamp become complicated due to the mixture of the orthogonal clamp and the universal clamp, the orthogonal clamp is also used as the universal clamp. A single pipe clamp technique is disclosed that can be used properly as a parallel clamp for making two single pipes parallel.

According to this technique, by bringing a cam stopper 7 provided inside the gripping body into contact with the cam surface 9 on the side surface of the connecting rod that connects the gripping bodies, even if only one type of universal clamp is used, two single clamps can be gripped. The orientation of the tubes can be orthogonal or parallel. However, according to this technique, the angle at which the two single pipes intersect is limited, which complicates the structure and poses the problem that the cam surface and the cam stopper cannot be fixed at an intermediate angle where they do not come into contact. .

Patent Literature 2 discloses a technique of a single tube clamp, which aims to eliminate looseness and hold a single tube with excellent strength. According to this technique, the tubular body 9 is inserted through the bases of a pair of grippers forming a single tube clamp, the tubular body is welded to the base of one gripper, and engaged with the base of the other gripper. A ring 12 is welded and fixed, and an annular engaging member 10 is welded to the end face of the cylindrical body through which the other holding body is inserted.

According to this technique, the orientation of the single tube held by the single tube clamp is determined at the position where the convex portion of the engaging ring 12 and the concave portion of the annular engaging member 10 are engaged. Orientation can be oriented according to the engagement position other than orthogonal or parallel. However, the single tube cannot be crossed at any angle other than the angle at which the engaging ring 12 and the annular engaging member 10 are engaged, and the structure of the single tube clamp is complicated, making it difficult to manufacture. There was a problem.

In addition to these techniques, there is a technique disclosed in Japanese Utility Model Application Laid-Open No. 05-52094, in which a fitting member 12 for regulating the rotation of a single tube clamp is provided so as to be tilted inside a gripper. Japanese Patent Application Laid-Open No. 11-107524 discloses a technique in which a rotation restricting member 31 is provided so as to move back and forth along the outside of the gripper. These techniques allow the universal clamp to be used as both an orthogonal clamp and a parallel clamp by providing additional members inside and outside the gripper to limit the crossing orientation of the two single pipes to be gripped. technology.

However, with these techniques, it is not possible to fix the intersecting direction in an arbitrary direction, which increases the number of members and complicates the manufacturing process. There was a possibility that the movable member would not move smoothly.

In Patent Document 5, by placing a connecting tool that connects a single pipe clamp to a pipe movement prevention space, the two pipes are prevented from rotating with each other, and the pipes are prevented from moving from the fixed state. Techniques are disclosed. As an example, an example in which the surface of the connector contacting the pipe is U-shaped, and an example in which a disk with a plurality of grooves engraved on the front and back surfaces is fitted into the opening of the fixing part and fixed by welding is shown. there is

However, according to this technique, the connecting member prevents the pipes from rotating with each other. one end and cannot fine-tune the crossing angle between the pipes at the other end. Furthermore, since a plurality of grooves are provided in the radial direction on the disk, there is a problem that the engraved grooves cannot be fixed at an arbitrary intersecting angle between grooves that are engaged with each other.

There is a tendency for the number of temporary construction workers to decrease, and construction of temporary scaffolds and the like is required to be able to be constructed easily and safely by a small number of workers. For example, when installing a single pipe for attaching treads for temporary stairs along the slope of the ground, or when installing a single pipe for hooking a fall prevention rope on a steel beam, etc., depending on the local situation , It is preferable that a single pipe can be installed by only one worker.

Conventionally, however, since the gradient of the slope of the natural ground is not constant, a plurality of workers are required to adjust the mounting position and the crossing angle of the free clamps at positions above and below the natural ground. A single pipe was installed along the surface. Furthermore, in the case of temporary stairs, it is necessary to angle-adjust the direction of the single pipe clamps provided on the side of the treads forming the temporary stairs in advance so that the treads are horizontal before attaching them to the single pipes. There was, and it took time and effort to construct the temporary stairs.

In addition, when installing a single pipe on a steel frame beam to prevent workers from falling, it is a dangerous work in a high place and a narrow place, so there is a need for a single pipe clamp that can be done easily and safely. Furthermore, when dismantling the temporary scaffolding, if one of the single pipe clamps supporting both ends of the single pipe is removed, the single pipe that was supported by the conventional flexible clamp will drop down, which is likely to cause an accident. was there.

Japanese Utility Model Laid-Open No. 03-035148 JP-A-04-306355 Japanese Utility Model Laid-Open No. 05-52094 JP-A-11-107524 JP 2011-26816 A

Therefore, according to the present invention, even if the structure of the single pipe clamp is not complicated, it is possible for one worker to temporarily fix the single pipe without limiting the crossing angle of the single pipe, and in the temporarily fixed state, the direction can be changed. To provide a structure for holding a single tube that can be finely adjusted and that does not loosen when fixed. Another object of the present invention is to provide a single-tube clamp and a tread plate that have this single-tube gripping structure and can be operated simply and safely.

In a gripping body for gripping a single pipe, the gripping body is slightly squeezed by bringing a holding portion of a rotating shaft portion rotatably inserted into a gripping member forming the gripping body into contact with the single pipe. In the closed state, the single tube presses the rotating shaft portion via the holding portion, and the pressing portion of the rotating shaft portion presses the gripping member to be temporarily fixed. The most important feature is that the shaft is permanently fixed so that it cannot rotate.

A first invention of the present invention is a single pipe gripping structure for gripping a temporary single pipe, comprising a first gripping member, a second gripping member, a rotating shaft portion, and narrowing means. each of the first gripping member and the second gripping member having a curved portion for gripping the single tube, one end of the first gripping member and the second gripping member being able to approach the curved portion The other ends of the first gripping member and the second gripping member are provided with narrowing means, and the rotating shaft portion includes a pressing portion that presses the first gripping member, and a first gripping member. and a holding portion that protrudes into the single tube holding space beyond the curved portion of the holding member, is rotatably supported by the first holding member, and holds the single tube on the curved surface that is brought closer to the first holding member. Then, in a state in which the squeezing means is tightened, the single tube widely contacts the curved portion of the second gripping member and at least the holding portion, and the pressing portion presses the first gripping member. In this state, the direction of the gripped single tube is temporarily fixed so as to be finely adjustable, and in the state in which the narrowing means is tightened, the single tube is in wide contact with the curved portion of the second gripping member, and the In a state in which the pressing portion presses the first gripping member while being in contact with the holding portion and widely in contact with the curved portion of the first gripping member, the direction of the held single pipe is permanently fixed so that the orientation cannot be changed. Characterized by

The temporary monotube clamp comprises a pair of grippers connected at their backs, each gripper having first and second gripping members. A single tube gripping structure according to the first aspect of the present invention is a gripping structure applied to a gripping body that constitutes a single tube clamp or the like, and in a temporarily fixed state, the direction of the held single tube can be finely adjusted. , It is a structure in which the direction of the held single pipe cannot be changed in the fixed state.

The first and second gripping members are pivoted at one end of each and have concave curvatures on opposing surfaces for gripping the monotube. A screw shaft having a nut screwed to the other end of the first gripping member is tiltably mounted, and the other end of the second gripping member is branched to form a screw shaft. It suffices that it has a forked portion that sandwiches the two, and the forked portion, the screw shaft body, and the nut constitute the tightening means, but the form of the tightening means is not limited.

The rotating shaft penetrates through the first gripping member, allows the first gripping member to rotate with respect to the rotating shaft, and includes a holding portion and the first gripping member that are in contact with the single tube. and a pressing portion that comes into contact with the The holding part protrudes slightly into the single-tube holding space from the curved part. The holding portion may be the distal end portion of the rotating shaft portion, or may be a holding member attached to the distal end portion of the rotating shaft portion. The single tube gripped by the single tube clamp is rotated in a plane parallel to the cross section of the rotating shaft portion.

The facing curved portions of the first and second gripping members are opened, and a single tube is inserted through the open portions to narrow the single-tube gripping space formed by the curved portions of the first and second grippers. Hold a single tube. Then, the screw shaft is tilted so that the screw shaft is sandwiched between the bifurcated portions, and the nut is tightened to grip the single tube.

When the nut is tightened to narrow the single pipe gripping space formed by the curved portion, the wide surface of the curved portion of the second gripping member abuts the single pipe and the holding portion is pressed, and the pressing portion is pressed against the first gripping member. is pressed to restrain the rotation of the rotating shaft portion, and the direction of the single tube is temporarily fixed. At this degree of tightening, only the holding portion is mainly in contact with the single pipe on the side of the first gripping member. can be adjusted. It goes without saying that a portion of the curved portion of the second gripping member other than the holding portion may be in contact with the single pipe.

Furthermore, when the nut is tightened and the second gripping member is tightened toward the first gripping member, the first gripping member is deformed, and not only the holding portion but also the curved portion comes into contact with a wide range, thereby holding the gripping member. It is permanently fixed so that the direction of the held single pipe does not change. If it is necessary to finely adjust the direction of the held single pipe, the direction of the single pipe may be finely adjusted after tightening it until it is temporarily fixed. If it is not necessary to change the direction of the single pipe, it should be strongly tightened from the beginning to be permanently fixed.

According to the first invention, it is possible to finely adjust the direction of the single pipe and to fix the single pipe so that the direction of the single pipe does not change, even by a single worker, without making the single pipe gripping structure a complicated structure. In addition, it is possible to fix the direction of the single tube in an arbitrary direction, which is an advantageous effect that has never existed before. Furthermore, even if one of the single tube clamps supporting both ends of the single tube is removed, the other single tube clamp fixes the single tube, so that the single tube does not drop down.

According to a second aspect of the present invention, in the single tube holding structure according to the first aspect, the holding portion and the pressing portion are made of a washer body, and the washer body is mounted on the rotating shaft portion. is characterized by A plurality of washer bodies may be provided, and a part of the washer body may be projected into the single tube gripping space to serve as the holding part, and a part of the washer body may serve as the pressing part.

In the gripping body of the conventional universal clamp, the rotating shaft portion is rotatable because the rotating shaft portion is separated from the single tube while the bending portion grips the single tube. According to the second invention, the washer body is formed into the holding part and the pressing part, and slightly protrudes from the curved part, and the washer body pressed by the single tube presses the first gripping member, thereby performing the first gripping. Rotation of the rotation shaft portion is suppressed with respect to the member. According to the second invention, it is only necessary to attach the washer to the conventional single-tube clamp, and there is an effect that the conventional single-tube clamp material can be effectively used.

A third invention of the present invention is the single pipe gripping structure according to the first or second invention, wherein the holding portion has angle display means in a cross-shaped direction radially from the center on the end face in contact with the single pipe. and the angle display means is a muscle that the single tube can climb over.

When changing the direction of the single tube, the muscle body may be a muscle body with a minute height that can be discerned by the touch that it is a good separation angle. It may be a ridge or the like with a length of about 0.5 mm. Since the height of the muscle body is such that the single pipe can be climbed over, it is easy to attach a handle for use as an orthogonal clamp or a parallel clamp, and it is easy to rotate the single pipe to an arbitrary angle.

A fourth aspect of the present invention is a single-tube clamp that comprises a pair of gripping bodies for crossing and gripping aligned single tubes, wherein a rotation shaft portion for rotating each gripping body is attached to one of the gripping bodies. The other gripping body has the single tube gripping structure of the first to third inventions, and the other gripping body responds to the tightening of the narrowing means. It is characterized in that it can be temporarily or permanently fixed to the body at any angle.

A fourth aspect of the invention is applied to the other gripping body of a single tube clamp in which the rotating shaft portion is fixed to the one gripping body. Since the rotating shaft portion is fixed to one gripping body, the rotating shaft portion does not rotate in one gripping body when the orientation of the other gripping body is adjusted. The crossing angle of the single tube can be determined only by squeezing the other gripper, which is suitable for parallel clamping or orthogonal clamping applications.

A fifth aspect of the present invention is a single tube clamp which comprises a pair of gripping bodies and is configured to cross and grip aligned single tubes, wherein a rotation shaft portion for rotating each gripping body is attached to each gripping body. Each of the gripping members has the single tube gripping structure of the first to third inventions, and the other gripping member is attached to the fully fixed one gripping member. It is characterized in that it can be temporarily fixed or permanently fixed to one of the gripping bodies at an arbitrary angle according to the tightening of the tightening means.

In the fifth invention, each gripping body forming the single tube clamp is provided with the single tube gripping structure of the first to third inventions. Even if priority must be given to tightening of the gripping bodies according to the site environment, the shape of the building, etc. where the temporary scaffolding is constructed, according to the single pipe clamp of the fifth invention, which of the gripping bodies comes first. It may be permanently fixed to the base, and there is an effect that it is easy to construct a temporary scaffold.

A sixth invention of the present invention is a tread that forms a temporary staircase and has a single pipe holding structure according to the first or second invention on the side end face of the tread. It is characterized by

Temporary stairs constructed on slopes such as ground and embankments have single pipes arranged on both sides of the treads, and the treads are fixed to the single pipes with clamps. Conventionally, it was necessary to adjust the direction of the clamp in advance so that the tread is horizontal, and then fix the tread to the single pipe with the clamp. However, according to the footboard of the sixth invention, the footboard is temporarily fixed so that the footboard is horizontal while the footboard is attached to the single pipe without adjusting the direction of the clamp in advance so that the footboard is horizontal. Alternatively, it may be permanently fixed, which has the effect of remarkably reducing work labor.

According to the single pipe gripping structure of the first aspect of the present invention, even a single worker can finely adjust the direction of the single pipe without making the single pipe gripping structure a complicated structure. It is possible to fix the single tube so that it does not change, and it is possible to fix the direction of the single tube in an arbitrary direction. Furthermore, even if one of the single tube clamps supporting both ends of the single tube is removed, the other single tube clamp fixes the single tube, so that the single tube does not drop down.
- According to the single tube gripping structure of the second invention, it is only necessary to attach the washer to the conventional single tube clamp, and there is an effect that the conventional single tube clamp material can be effectively used.
・According to the single pipe gripping structure of the third invention, it is easy to attach a handle for use as an orthogonal clamp or a parallel clamp, and it is easy to rotate the single pipe to an arbitrary angle.

- According to the single tube clamp of the fourth aspect of the invention, when the orientation of the other gripping body is adjusted, the rotating shaft portion does not rotate in the one gripping body. The crossing angle of the single tube can be determined only by squeezing the other gripper, which is suitable for parallel clamping or orthogonal clamping applications.
- According to the single tube clamp of the fifth invention, any of the holding bodies may be permanently fixed first, and there is an effect that it is easy to construct a temporary scaffold.
- According to the footboard of the sixth invention, even if the direction of the clamp is not adjusted in advance so that the footboard is horizontal, while the footboard is attached to the single pipe, it is temporarily fixed or fixed so that the footboard is horizontal. It only needs to be permanently fixed, and there is an effect that work labor is remarkably reduced.

Explanatory drawing of a single tube clamp (Example 1). Explanatory drawing of a single tube clamp (Example 2). Explanatory drawing of a single tube clamp (Example 3). Explanatory drawing of a washer body (Example 4). Explanatory drawing of a washer body (Example 5). Explanatory drawing of a clamp (Example 6). Explanatory drawing of a step board (Example 7).

In the single pipe gripping structure of the present invention, the facing inner surfaces of a pair of gripping members for gripping a single pipe are formed as curved portions, and the curved portion of one of the gripping members is widely in contact with the single pipe. Then, the top surface of the rotating shaft portion is slightly protruded from the curved portion of the other gripping member to form a holding portion. The most important feature is that the crossing angle of the single pipes can be finely adjusted, and when the holding part and the bending part are in contact with the single pipes widely, the crossing angle of the single pipes is fixed and cannot be changed. and

In the single tube clamp 1 of the first embodiment, a pair of gripping bodies 100, 100 having the same shape are connected by being passed through the rotating shaft portion 10, and the crossing angle of the pair of single tubes to be gripped can be set freely. FIG. 1(A) shows a perspective view of the single tube clamp 1, and FIG. 1(B) shows a sectional view. In order to facilitate understanding, in FIG. 1(A), one gripping body is indicated by broken lines, and in FIG. 1(B), only the rotating shaft portion 10 and one single tube 20 are indicated by solid lines. ing.

Each of the gripping bodies is formed by bending a plate, and has a first gripping member 110, a second gripping member 120, and narrowing means, which are connected to each other by a rotating shaft portion 10 so as to be capable of axial movement. The first gripping member 110 and the second gripping member 120 have curved portions for gripping a single tube at the facing tops of the respective side walls 111, 121, and are pivotally supported at one end.

A nut 112 is screwed to the other end of the first gripping member 110 to pivotally support a tilted screw shaft 113, and the other end of the second gripping member 120 is It has a bifurcated portion 122 for clamping the screw shaft portion. The screw shaft body 113 to which the nut 112 is screwed and the bifurcated portion 122 serve as tightening means. The single tube 20 is inserted into the single tube gripping space 200 formed by the curved portion, and the pivotally supported second gripping member 120 is pivoted toward the first gripping member 110, and the screw is inserted into the forked portion 122. The shaft portion 113 is sandwiched, and the nut 112 is tightened to grip the single tube 20 .

The rotating shaft portion 10 is composed of a cylindrical body 300 and a pair of annular bodies 310, 310. The pair of gripping bodies 100, 100 are inserted through holes 311 formed in the rear surfaces facing each other, so that the pair of gripping bodies can be rotated. support the shaft. After the cylindrical body 300 is inserted through the hole 311, the annular bodies 310 and 310 are fitted into the cylindrical body 300 from the single tube gripping spaces 200 and 200 of the pair of gripping bodies, respectively, and both ends of the cylindrical body 300 are pressed. It is crushed (see FIG. 1(B)). In the crimped state, the top surface 301 of the cylindrical body slightly protrudes into each single tube holding space. The protrusion height (α) is preferably 0.5 mm to 1.0 mm, but is not limited.

In this embodiment, the annular bodies 310, 310 are used as the pressing parts, and the crimped top surface 301 of the cylindrical body is used as the holding part. The single tube gripping space 200 of the gripping body is opened, the single tube 20 is inserted, the screw shaft body 113 is fitted into the bifurcated portion 122, the nut 112 is tightened, and the single tube gripping space 200 is narrowed by the tightening means. Then, the top of the curved side wall 121 of the second gripping member 120 comes into wide contact with the single tube 20 . On the other hand, since the top surface 301 of the cylindrical body forming the holding portion protrudes from the curved portion 114 of the first gripping member into the single tube gripping space 200, the single tube 20 presses the cylindrical body 300, and the cylindrical body 300 presses the annular body 310, the first gripping member 110 is drawn, and the single tube 20 is temporarily fixed.

Even if one end of a long single pipe is temporarily fixed and the other end is in a cantilevered state, the single pipe will not drop down, and even if one worker is working, the other end can be The direction of the single tube can be finely adjusted by moving to the part and tapping the other end with a hammer or the like. In addition, the tightening strength for temporary fixation should be such that the single pipe does not shift from the held state. should be adjusted by

When the squeezing means is further tightened from the state in which the single tube is temporarily fixed, the first gripping member 110 is deformed around the holding portion, and the top of the curved portion of the side wall 111 of the first gripping member is bent. While widely contacting the single tube, the first gripping member 110 is drawn toward the single tube gripping space, the first gripping member 110 is strongly pressed against the annular body 310, and the single tube 20, the cylindrical body 300, and the annular body 310 and the first gripping member 110 are integrated, and the held single tube is finally fixed in a state in which the orientation cannot be changed.

In Example 2, the state of temporary fixation and final fixation will be described in more detail with reference to FIG. Fig. 2(A) shows a state in which the single pipe holding space 200 is opened and the single pipe 20 is inserted, Fig. 2(B) shows a state in which the single pipe is temporarily fixed, and Fig. 2(C). indicates a state in which the single tube is permanently fixed.

In the second embodiment, a shaft body 420 having a flange portion 410 is inserted through the first gripping member 110 as the rotating shaft portion 400 . The pivot shaft portion extending from the first gripping member 110 is fixed to other objects to be fixed, such as temporary structures, furniture, mobile objects such as automobiles, and the like. The flange portion 410 of the rotating shaft portion 400 of the single tube clamp 2 of the second embodiment prevents the first gripping member 110 from coming off the rotating shaft portion 400 . A top surface 411 of the rotating shaft portion serves as a holding portion.

With the curved portion of the second gripping member separated from the curved portion of the first gripping member, the single tube gripping space 200 is opened, and the single tube 20 is inserted into the single tube gripping space, the single tube 20 is at least rotated. It is in contact with the top surface 411 of the shaft (see FIG. 2(A)). Depending on the state of rotation of the first gripping member in the horizontal direction and the state of tilting in the vertical direction, it may be in contact with any position of the curved portion 114 of the first gripping member.

The single tube 20 is covered with the second gripping member 120, and the single tube gripping space 200 is closed. When the nut 112 is tightened, the curved portion 124 of the second gripping member widely contacts the single pipe, and the single pipe strongly presses the top surface 411 of the rotating shaft portion that forms the holding portion. , the first gripping member 110 is pulled up to press the flange 410, and the single tube, the rotating shaft and the first gripping member are integrated and temporarily fixed (FIG. 2(B)). figure). In this state, the single tube is mainly in contact with the top surface 411 of the rotating shaft portion that forms the holding portion, but may be in contact with the curved portion 114 of the first gripping member depending on the position in the single tube gripping space 200 .

When the nut 112 is further tightened from this state and the single tube 20 is tightened by the first gripping member 110 and the second gripping member 120, the rotation shaft portion of the first gripping member 110 comes into contact with the single tube. It is deformed so that the left and right are curved upward around the position where it is. As a result, the single tube comes into contact with not only the top surface 411 of the rotating shaft portion but also the deformed curved portion 115 widely, and the single tube 20, the rotating shaft portion 400 and the first gripping member 110 are more strongly integrated. 2(C), so that it is not rotated (Fig. 2(C)). Needless to say, when the curved portion of the first gripping member contacts widely, the entire curved portion does not have to come into contact.

In Example 3, the rotation shaft portion of the single tube clamp 3 is indicated by a solid line, and the first and second gripping members are indicated by a broken line, and will be described with reference to FIG. there). The single tube clamp 3 of Example 3 is composed of a pair of grippers 101 and 102 which are in contact with each other at their backs. The central portion of the back surface of the first gripping member 116 of the gripping body 102 shown in the top and bottom of the figure is formed into a cylindrical body 117 by forging. 118 is inserted.

After the annular body 312 is fitted into the cylindrical body 117 inserted through the hole, the top portion 119 of the cylindrical body is crimped to form a holding portion. The top part 119 of the cylindrical body slightly protrudes into the single tube holding space 200 . In the single tube clamp 3, only one holding body 101 is rotatable with respect to the cylindrical body. Although not shown in FIG. 3, a muscle that allows the single pipe to climb over, which serves as angle display means in parallel and orthogonal directions with respect to the axis of the single pipe gripped by the gripper 102, is a cylindrical body. If it is formed on the top surface 119 of , it is easy to use as an orthogonal clamp or a parallel clamp, which is suitable.

In the fourth embodiment, a single tube is mounted with a washer that provides the single tube gripping structure of the present invention to a universal clamp in which one gripping body is provided with a crimped connecting shaft for rotating the other gripping body. The clamp 4 will be explained with reference to FIG. The single tube clamp 4 is formed by forging the central part of the back surface of the gripping body 103 at the top and bottom of the figure, inserting it into a hole 313 provided on the back surface of the gripping body 104 at the top, and then bending the connecting shaft 314. , and the pair of holding bodies 103 and 104 are integrated.

In the single tube clamp 4, a plurality of thin discs 315 are attached as washers to the top surface of the warped connecting shaft 314, and the top surface of the discs 315 protrudes into the single tube holding space as a holding portion. . A screw extends through the hole 313 from a disk 316 attached to the other gripper and fixes the disk 315 . In the flexible clamp of this shape, the height of the side wall of the curved portion differs depending on the manufacturer, but according to the single tube gripping structure of the single tube clamp 4, thin discs 315 are stacked and the top surface is It is only necessary to project slightly into the single-tube holding space 200, and it is also applicable to single-tube clamps having side walls of different standing heights.

In the fifth embodiment, a single tube clamping structure including a washer is provided to easily convert the single tube clamp 5, which is formed by connecting the same shaped grippers 105 and 106 with a cylindrical connecting shaft 500, into an orthogonal clamp or a parallel clamp. , with reference to FIG. FIG. 5(A) shows a plan view of the connecting portion of one gripper 105, FIG. 5(B) shows a sectional view along line AA in FIG. 5(A), and FIG. 5(C). 5A shows a cross-sectional view taken along line BB of FIG. 5A, and FIG.

The single tube clamp 5 has a cylindrical body inserted into holes formed in the facing surfaces of the pair of gripping bodies 105 and 106, and both ends of the cylindrical body are crimped to form a connecting shaft 500 (FIG. 5(C)). ), and each gripper 105 , 106 is rotatable with respect to the connecting shaft 500 . In the single-tube clamping structure of the single-tube clamp 5, a direction regulating disk 501 having grooves 510 engraved in a cross direction mounted on a connecting shaft 500 and a first gripping body 105, a height adjusting plate 502, a A rotation restricting plate 503 attached to the gripper 2 and a connecting spring 504 form a rotation shaft. The direction regulating disk serves as the holding portion, and the height adjusting plate serves as the pressing portion.

The rotation restricting plate 503 has a rectangular shape, and both side edges abut against the side walls 111 of the second gripper, thereby restricting rotation in the second gripper. A rectangular hole 505 is formed in the rotation restricting plate, and a wide connecting spring 504 having a bifurcated tip is mounted so as to come into contact with the side edge of the rectangular hole 505, and the connecting spring 504 is also restricted from rotating. The connecting spring has an operation portion for retracting the tip and a finger contact portion 506 that serves as a stopper at the forked base portion, and has an outwardly warped claw portion 507 at each of the two-forked tip portions.

The direction control disk 501 is a disk in which a V-shaped groove 510 with a depth of about 0.5 mm to 1 mm is formed so as to form a cross shape radially from the center. A plate 502 forms a washer. In addition, a claw engaging portion 508 for hooking the claw portion 507 is engraved in one direction forming a cross. The height adjusting plate and the direction regulating disc are applied to the connecting shaft on the first gripper side, the rotation restricting plate is applied to the connecting shaft on the second gripping body side, and the bifurcated tip of the connecting spring 504 is the rotation restricting plate. is inserted into the rectangular hole 505 of , the connecting shaft 500 is passed through, and each claw portion 507 is hooked to the claw engaging portion 508 of the direction regulating disk to constitute the rotating shaft portion.

When the connecting spring 504 penetrates and integrates the rotation restricting plate 504, the connecting shaft 500, the height adjusting plate 502, and the direction restricting disc 501 (Fig. 5C), the top surface of the direction restricting disc , project slightly from the curved portion of the first gripping portion of the first gripping body into the single tube gripping space to form a holding portion. The projection dimension (α) may be approximately 0.5 mm to 1.0 mm. The thickness of the height adjustment plate 502 may be set to the above-described projection dimension according to the difference in height from the top surface of the connecting shaft to the top of the curved portion of the side wall. Since the rotating shaft portion is restricted from rotating with respect to the second gripping body 106, the groove 510 engraved in the direction of the cross is the same as the single tube gripped by the second gripping body 106. oriented or orthogonally oriented.

In the single tube clamp 5, when the single tube in the first gripping body 105 is in contact with the groove extending in the cross direction, the direction of the single tube gripped by the first and second gripping bodies is parallel or orthogonal. Limited. It is easy to use it properly as a parallel clamp or an orthogonal clamp according to the response of the single pipe hitting the groove. Furthermore, since the depth of the groove 510 is shallow, it is easy to finely adjust the direction of the single pipe, and it is possible to temporarily fix or permanently fix the single pipe without limiting the direction of the single pipe.

In the sixth embodiment, a single tube clamp 6 in which a rotating shaft portion 620 is fixed to a fixing device consisting of a fitting 600 having a substantially U-shaped cross section and a bolt 601 will be described with reference to FIG. FIG. 6(A) shows a side view of the single pipe clamp 6, and FIG. 6(B) shows a state in which an inclined steel frame beam 610 is attached with a temporary fall prevention handrail. A substantially U-shaped metal fitting 600 is fixed to an H-shaped steel flange, a workbench, or the like at an open portion with bolts 601 .

The rotation shaft 620 has a flange 630 that serves as a pressing portion at its intermediate portion, and a first gripping member 640 of the gripping body that slightly protrudes into the single tube gripping space so that the tip serves as a holding portion. is mounted and fixed by welding to the side surface of the metal fitting 600 having a substantially U-shape. The single pipe clamp 6 of Example 6 can easily vertically fix the single pipe 21 forming a baluster for a handrail even on steel beams with different slopes (Fig. 6(B)). The single pipes 21 that form the balusters are clamped by the single pipe clamps (1 to 5) that hold the two single pipes described in the other embodiments. should be grasped.

Even when the assembled single tubes 21 and 22 are dismantled, each single tube gripper temporarily or permanently fixes the single tube. Even if it is loosened and opened, the single tube clamp on the other side temporarily or permanently fixes the single tube, so the single tube does not drop down. This prevents an accident in which a finger is caught in a drooping tube.

In a seventh embodiment, a tread 700 for installing a temporary staircase to be installed in natural ground will be described with reference to FIG. As the temporary footboard 700, a diamond-shaped or hexagonal perforated board 710 is used, which is made by stretching a metal plate with zigzag cuts. The tread plate 700 surrounds a perforated plate 710 with a metal frame 720 . A footboard 700 of Example 7 is equipped with a single tube clamp 7 having a single tube gripping structure of the present invention on the side surface of a frame 710 on its side (see FIG. 7(A)).

The rotating shafts of the single tube clamps 7 on both sides of the tread plate have a holding section slightly projecting into the single tube holding space and a pressing section for pressing the first holding member. Single pipes 24, 24 are connected obliquely in parallel to the right and left single pipes 23, which are vertical members driven into the ground, so as to form a slope along the ground (Fig. 6 (B ) see figure). A tread plate 700 is installed on the single pipes 24 arranged on the left and right so that the tread surface is horizontal.

With the treads in a substantially horizontal state, one of the single pipe clamps 7 of the treads 700 is temporarily fixed to one of the single pipes 24 to temporarily fix the treads in a substantially horizontal state. Then, the other single tube clamp 7 of the tread plate is attached to the other single tube 24, and in this state, it is confirmed that the tread surface is level with high precision, and then the tread surface is fully fixed. If it is necessary to correct the horizontality of the tread surface when attaching the other single tube clamp 7, lightly tap the temporarily fixed tread surface with a hammer or the like to accurately level the tread surface. After that, fix it properly.

(others)
・The above-described embodiment is an example of the embodiment of the present invention, and the materials, shapes, and dimensions of the constituent members constituting the single-pipe gripping structure are not limited, and modifications within the scope of the present invention are of course possible. It is included in the technical scope of the present invention.
- The embodiments disclosed this time are illustrative in all respects and should be considered not restrictive. The technical scope of the present invention is not limited to the above description, but is indicated by the scope of claims, and is intended to include all modifications within the scope and meaning equivalent to the scope of claims.

1, 2, 3, 4, 5, 6, 7: single tube clamp,
10: Rotating shaft portion, 20, 21, 22, 23, 24: Single tube,
100, 101, 102, 103, 104, 105, 106: gripping body,
110, 116: first gripping member, 120: second gripping member,
111: side wall, 112: nut, 113: screw shaft, 114: curved portion of the first gripping member,
115: deformed curved portion, 117: cylinder, 118: hole, 119: top of cylinder,
121: side wall, 122: bifurcated portion, 124: curved portion of the second gripping member,
200: single tube gripping space, 300: cylindrical body, 301: top surface, 310, 312: annular body,
311, 313: hole, 314: connecting shaft, 315, 316: disk,
400: rotation shaft portion, 410: flange portion, 411: top surface of rotation shaft portion, 420: shaft body,
500: connecting shaft, 501: direction control disk, 502: height adjustment plate,
503: rotation restricting plate, 504: connecting spring, 505: rectangular hole, 506: finger contact portion,
507: claw portion, 508: claw engaging portion, 510: groove, 600: metal fitting, 601: bolt,
610: Steel beam, 620: Rotating shaft, 630: Flange, 640: First gripping member,
700: footboard, 710: perforated plate, 720: frame

A first invention of the present invention is a single pipe gripping structure for gripping a temporary single pipe, comprising a first gripping member, a second gripping member, a rotating shaft portion, and narrowing means, Each of the first gripping member and the second gripping member has a curved portion for gripping the single tube, and one end of each of the first gripping member and the second gripping member is pivoted to allow the curved portions to be brought closer together. The other ends of the first gripping member and the second gripping member are provided with narrowing means, and the rotating shaft portion includes a pressing portion for pressing the first gripping member and the first gripping member. and a holding portion protruding into the single tube holding space from the curved portion of the single tube gripping structure rotatably supported by the first gripping member, wherein the curved surface brought close to the In a state in which the single tube is held and then the narrowing means is squeezed, the single tube widely contacts the curved portion of the second gripping member and at least the holding portion, and the pressing portion is in contact with the first holding portion. The direction of the gripped single tube is temporarily fixed so that the direction of the gripped single tube can be finely adjusted while the gripping member is pressed. The direction of the gripped single tube is unchangeably fixed in a state in which the single tube is in contact with the holding portion and the curved portion of the first gripping member and the pressing portion is pressing the first gripping member. It is characterized by being fixed.

Claims (6)

A single pipe holding structure for holding a temporary single pipe,
including a first gripping member, a second gripping member, a pivot shaft, and narrowing means,
each of the first gripping member and the second gripping member includes a curved portion for gripping a single tube;
One end of the first gripping member and the second gripping member pivotally support the curved portion so as to be approachable, and the other end of the first gripping member and the second gripping member comprises a narrowing means. ,
The rotating shaft portion has a pressing portion that presses the first gripping member, and a holding portion that protrudes into the single tube gripping space beyond the curved portion of the first gripping member. rotatably supported,
In a state in which the single tube is held by the curved surfaces brought close to each other and then the narrowing means is tightened, the single tube is in wide contact with the curved portion of the second gripping member and is at least in contact with the holding portion. the direction of the gripped single tube is temporarily fixed so as to be finely adjustable in a state in which the pressing portion presses the first gripping member,
In a state in which the squeezing means is tightened, the single tube widely contacts the curved portion of the second gripping member, contacts the holding portion and widely contacts the curved portion of the first gripping member, and presses. In a state where the portion presses the first gripping member, the direction of the gripped single tube is permanently fixed so that the orientation cannot be changed.
A single tube gripping structure characterized by: the holding portion is composed of a washer body,
The washer body is attached to the rotating shaft,
The single pipe holding structure according to claim 1, characterized in that: The holding part has an angle display means in a direction radially crossing from the center on the end face in contact with the single pipe,
The angle display means is a muscle that the single tube can climb over,
The single pipe gripping structure according to claim 1 or 2, characterized in that: A single tube clamp that consists of a pair of gripping bodies and that crosses and grips aligned single tubes,
A rotation shaft for rotating each gripping body is fixed to a gripping member of one of the gripping bodies,
The other gripping body has the single tube gripping structure according to any one of claims 1 to 3,
The other gripping body can be temporarily fixed or permanently fixed at an arbitrary angle with respect to the one gripping body according to the tightening of the narrowing means.
A single tube clamp characterized by: A single tube clamp that consists of a pair of gripping bodies and that crosses and grips aligned single tubes,
A rotation shaft for rotating each gripping body is loosely fitted in a gripping member of each gripping body,
Each gripping body has the single tube gripping structure according to any one of claims 1 to 3,
With respect to one gripped body that is permanently fixed, the other gripped body can be temporarily fixed or permanently fixed at an arbitrary angle with respect to the one gripped body according to the tightening of the narrowing means.
A single tube clamp characterized by: A tread that is laterally fixed to a single pipe for forming a temporary staircase,
The single-tube gripping structure according to any one of claims 1 and 2 is provided on the side end surface of the footboard,
A tread characterized by:

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