JP7734706B2 - How to hang the clip and liquid receiving sheet and how to install the mounting material - Google Patents

Description

The present invention relates to a clip that can be attached to a suspension bolt or the like and can support a sheet or the like when attached, and in particular to a clip that can be attached to a suspension bolt or the like using a manipulator.

When a ceiling leak occurs in a building or train station, a simple emergency measure is to cover the leaking part of the ceiling with a protective sheet. For example, a water outlet is provided in the center of the protective sheet, and a hose or drain pipe is connected to the outlet, allowing the leaked water to be discharged into a bucket or outside (see Patent Documents 1 and 2).

On the other hand, a leak tray can be installed using suspension bolts placed above the ceiling of a building (see Patent Document 3). Alternatively, multiple strip-shaped sheets sized to fit the locations of the suspension bolts can be prepared and connected to each other with fasteners, allowing the liquid receiving sheet to be installed on the suspension bolts (see Patent Document 4).

Patent No. 6382469 Japanese Utility Model Application Laid-Open Publication No. 4-94045 Japanese Unexamined Patent Publication No. 52-25416 Japanese Patent Application Laid-Open No. 2021-92084

The ceilings of stations and other buildings are often filled with pipes, power lines, and communication cables, as well as related equipment. As a result, there is not enough space available for work. Meanwhile, when installing a sheet to cover a water leak, if the suspension bolts used to install the sheet are far from the ceiling inspection hatch, it is virtually impossible to carry out the installation work. Similar problems arise when installing a sheet in a location where a stepladder or similar equipment cannot be installed, or where it is difficult to reach.

Therefore, there is a need to provide a device that can be easily attached to difficult-to-access hanging bolts and the like and can hold sheets, etc.

The present invention addresses the technological trend of providing a clip that can be attached to a hanging bolt or the like using a remotely controlled manipulator and can hold a sheet or the like.

The clip of the present invention is a clip that can fasten to a suspension bolt an object that can be held (here, referred to as the "attached object"), such as a sheet such as a liquid receiving sheet (including a protective sheet) or a hanger that holds a base material, and is configured so that it can be attached to the suspension bolt by remote control using a manipulator. The manipulator only needs to be able to perform movements similar to those of a human hand, and can be configured as a manipulator that can at least perform the actions of grasping and releasing the grasped object by remote control.

The clip of the present invention is equipped with a spring and a clamping member with a pair of pieces that can open and close around the connecting part as an axis. For example, a coiled torsion spring can be arranged coaxially with the connecting part. The width and length of the pair of pieces can be determined based on the size (diameter) of the hanging bolt. The elastic force of the spring can be determined so that, for example, when a force is applied in the longitudinal direction of the clamping members while the hanging bolt is clamped by the clamping members, the clip can slide.

In this invention, one side of the clamping member has a curved portion extending away from the other side so that the manipulator can grasp the other side. It also has an engagement mechanism for connecting directly or indirectly with the workpiece.

The configuration of the warped portion, such as the degree of expansion and angle of inclination relative to the other piece, can be determined depending on the size and shape of the tip of the manipulator (the gripping portion and the portion extending from the gripping portion toward the operator (e.g., the bay-shaped portion)). The configuration of the engaging portion can be determined according to the type of material to be attached, such as a sheet, and the intervening material used for connecting them. For example, if the liquid receiving sheet is to be hung using a hanging bolt, a hole for passing a string or the like can be configured as the engaging portion.

In this invention, the spring applies force to close the sides of the pair of pieces that form the curved portion and engagement portion. The clamping member can then clamp the suspension bolt between the curved portion and the connecting portion. This attaches the clip to the suspension bolt.

It is possible to form opposing convex portions between the curved portion and the connecting portion on each pair of pieces. The convex portions can be of various sizes and shapes, as long as they are designed so that the clip can slide over the hanging bolt while being clamped by the clamping member. For example, they can be configured as mountain-shaped convex portions. Note that the term "convex portion" here also includes stepped shapes. The clamping member can be configured to clamp the hanging bolt between the convex portion and the connecting portion.

The pair of pieces can be configured so that they partially contact or are close to each other. For example, one end of the curved portion can be configured to contact the other piece.

The clamping member may be configured so that its attachment position relative to the suspension bolt is determined by the elastic force of a spring, or it may be configured to engage with the threads of the suspension bolt and be positioned vertically. To prevent the clip from changing position and shifting when the weight of the attached material, such as a sheet, pulls it downward, the pair of pieces can be provided with edges that can engage with the male threads of the suspension bolt. For example, both longitudinal edges of the pair of pieces can be formed into edge-like edges that protrude from the pieces. Alternatively, only one edge can be formed into an edge-like edge.

Using the clip of the present invention described above, a method for hanging a liquid receiving sheet from a hanging bolt placed in the ceiling can be provided. Another aspect of the present invention, a method for hanging a liquid receiving sheet, involves connecting the liquid receiving sheet directly or indirectly to the clip's engaging portion, clamping the other piece of the clip with the tip of a manipulator, and attaching the clip to the hanging bolt by pulling the manipulator from the rear toward the front of the hanging bolt as seen from the manipulator operator so that the hanging bolt passes between the pair of pieces. Here, the liquid receiving sheet includes a protective sheet. For example, the liquid receiving sheet can be hung by threading strings through multiple holes in the corners of the liquid receiving sheet and attaching clips to hanging bolts located in suitable positions for hanging from each hole. Additionally, "rear side" here does not refer only to the area strictly facing the suspension bolt, but also includes the area beyond the suspension bolt as viewed from the operator's side (the space further away from the imaginary plane perpendicular to the operator that passes through the suspension bolt), and is defined as the range within which the manipulator can attach the clip.

Furthermore, by using the clip of the present invention described above, it is possible to provide a method for attaching other workpieces to rod-shaped members other than suspension bolts. Another aspect of the present invention, a method for attaching a workpiece, involves connecting the workpiece directly or indirectly to the engaging portion of the clip, clamping the other piece of the clip with the tip of a manipulator, and then pulling the manipulator from the rear side of the rod-shaped member toward the front side as seen from the manipulator operator so that the rod-shaped member passes between the pair of pieces, thereby attaching the clip to the rod-shaped member. The meaning of "rear side" here is as described above.

A clip, another aspect of the present invention, comprises an elastic clamping member capable of clamping a rod-shaped member, one end of which expands so that it can be grasped by a manipulator. An engaging portion for connecting directly or indirectly to the workpiece is formed on one end of the expanding clamping member, allowing the rod-shaped member to be slidably clamped from one end of the expanding clamping member to the attachment position. The clamping member can be configured, for example, so that a pair of pieces are opened and closed by a spring. Various springs can be used, such as torsion springs and C-shaped springs. The clamping member can also be opened and closed using elastic members or materials other than springs. Alternatively, the clamping member can be formed by bending a plate-shaped member and configured to clamp a rod-shaped member such as a suspension bolt. The shape and degree of expansion of the clamping member can be determined according to the shape (e.g., curved shape) and form (e.g., curved and straight portions, or curved portion only) of the tip of the manipulator, i.e., the part that grips the workpiece.

The present invention provides a clip that can be easily attached to difficult-to-access hanging bolts and the like, and can hold sheets and other items.

FIG. 2 is a view showing a part of the liquid receiving sheet according to the present embodiment. FIG. 2 is a schematic side view of the clip of the present embodiment. FIG. 2 is a schematic cross-sectional view taken along line II-II of FIG. FIG. 2 is a schematic plan view showing a part of the clip of the present embodiment. 10A and 10B are diagrams showing the process of attaching a clip to a hanging bolt using a manipulator.

The following describes the clip of this embodiment and the method for installing (hanging) the liquid receiving sheet on the hanging bolt, with reference to the drawings.

The liquid receiving sheet 100 is configured as a sheet that can receive water leaking from rainwater and other sources above the ceiling and extract the leaked water so that it does not reach the ceiling. Here, the liquid receiving sheet 100 is installed in the above-the-ceiling space of a building such as a public building or train station.

The liquid receiving sheet 100 is made of a stretchable sheet, such as a lightweight, waterproof polyester sheet (e.g., a white smoke-proof sheet). The liquid receiving sheet 100 may also be made of a transparent vinyl sheet, or a conventional protective sheet may be used.

A metal fitting 130 with an opening that serves as a drain outlet is attached near the center of the liquid receiving sheet 100, and the tip of the hose 120 is connected to the metal fitting 130. Leaked water that drips onto the liquid receiving sheet 100 flows down the surface of the sheet toward the drain fitting 130 and into the hose 120, where it is extracted.

A number of holes are formed around the periphery of the liquid receiving sheet 100. Here, holes 100R are formed at each of the four corners of the liquid receiving sheet 100 and near the middle edge. A string 150 for hanging the liquid receiving sheet 100 is threaded through each hole 100R. Note that Figure 1 shows only a portion of the liquid receiving sheet 100, and only one hole 100R is shown.

In the attic space, the underlayment materials, the rafter support materials (not shown), are installed in a row on the underside of the ceiling, and the rafters (not shown) are installed in a direction that intersects with the rafter support. The hanging bolts 200 that hang down from the base above are connected to the rafters via hanging hangers (not shown). The hanging bolts 200 are lined up in line with the installation locations of the rafters, and are regularly spaced at specified intervals along the direction in which the rafters extend.

The clip 10 is a fastener used to attach and support (hang) the liquid receiving sheet 100 to the hanging bolt 200. By clamping the hanging bolt 200, the clip 10 can hold the liquid receiving sheet 100 in place while it is attached to the hanging bolt 200.

The liquid receiving sheet 100 is attached to and suspended from multiple hanging bolts 200 that hang relatively close to holes 100R formed in the four corners and central edge. Clips 10 connected to strings 150 threaded through each hole 100R are attached to the corresponding hanging bolts 200 at a predetermined height. The liquid receiving sheet 100 is held in a bent state with the center at a low position.

Figure 2 is a schematic side view of the clip. Figure 3 is a schematic cross-sectional view taken along line II-II in Figure 2. Figure 4 is a schematic plan view showing a portion of the clip as viewed from above. The configuration of clip 10 will be explained using Figures 2 to 4.

As shown in FIG. 2, clip 10 has a clamping member 15 made up of a pair of pieces 20, 30. Piece (one piece) 20 is made of a plate material that is bent partway through, and piece (the other piece) 30 is made of a straight plate material. When viewed from the side with the pair of ends 20E2, 30E2 facing downwards, clip 10 has a K-shaped configuration. The pair of pieces 20, 30 can be made of any material, such as a metal such as stainless steel. Pieces 20, 30 may also be formed by joining multiple plates together.

The clamping member 15 includes a spring 40. As shown in FIG. 3, the spring 40 is a coiled torsion spring and is disposed at the connecting portion 50 of the pair of pieces 20, 30. The connecting portion 50 is configured such that tongue portions 22, 32 formed on both longitudinal edges of the pair of pieces 20, 30 are in surface contact with each other. The spring 40 is disposed between the tongue portions 22, 32 of the connecting portion 50 so that its coil axis is aligned along the lateral direction of the pair of pieces 20, 30.

The spring 40 exerts an elastic force in a direction that opens the ends 20E1, 30E1 (hereinafter referred to as one end) of the pair of pieces 20, 30, i.e., in a direction that closes the ends 20E2, 30E2 (hereinafter referred to as the other end). Therefore, when a force is applied in a direction that moves the other ends 20E2, 30E2 of the pair of pieces 20, 30 toward each other, a restoring force is exerted. Note that the spring 40 can also be constructed using an elastic material other than a torsion spring.

The clamping member 15 is configured to be rotatable around the axis C of the connecting portion 50. For example, a pin (not shown) can be passed through a hole 50R formed around the axis C, allowing the pair of pieces 20, 30 to rotate around the axis while in surface contact at the connecting portion 50. Alternatively, by abutting both ends of the spring 40, which is a torsion spring, against the edges of the pair of pieces 20, 30 and applying force, the pair of pieces 20, 30 can be rotated around the axis while in surface contact at the connecting portion 50.

When the clamping member 15 is closed, the bent piece 20 comes into contact with the piece 30 midway. Beyond the contact point CT with the piece 30, a warped portion 21 is formed, extending away from the piece 30. A distance is provided between the warped portion 21 and the piece 30 so that the tip of the manipulator, described below, can grasp the piece 30. Here, the warped portion 21 extends at a fixed angle relative to the piece 30.

A hole 21R is formed on one end 20E1 of the piece 20 (see Figure 4). The hole 21R is configured as an engagement part that connects the string 150 to the clip 10. Here, the end of the string 150 shown in Figure 1 is attached to the double ring RR, and the double ring RR is attached to the hole 21R. Alternatively, the string 150 may be tied directly to the hole 21R.

Regulating members 25, 35 are attached to the pair of pieces 20, 30, respectively. Here, the restricting member 25 is composed of a screw 26, a washer 27, and a nut 28. Similarly, the restricting member 35 is composed of a screw 26, a washer 27, and a nut 28. The apexes 26T, 36T of the screws 26, 36 form convex portions on the opposing surfaces 20S, 30S of the pieces 20, 30. When the pair of pieces 20, 30 are closed, the apexes 26T, 36T of the screws 26, 36 are in contact with each other.

Elongated holes 20R, 30R are formed in the pair of pieces 20, 30 along their longitudinal direction (see Figures 2 and 3). Restricting members 25, 35 are attached to pieces 20, 30, respectively, through these holes 20R, 30R. Restricting members 25, 35 can be fixed within the opening area along the longitudinal direction of holes 20R, 30R, and their attachment positions can be adjusted along the longitudinal direction of restricting members 25, 35.

As shown in Figure 3, the pair of pieces 20, 30 have edge-like edge portions 20G, 30G that extend vertically from the surfaces 20S, 30S. However, in Figure 3, the thickness of the pair of pieces 20, 30 and the thickness of the connecting portion 50 are exaggerated.

Using clips 10 equipped with this type of pinching function, workers can install the liquid receiving sheet 100 above the ceiling. Specifically, the worker remotely attaches the clips 10, which are connected to the liquid receiving sheet 100 via strings 150, to the specified hanging bolts 200. This is explained below.

Figure 5 shows the process of attaching the clip 10 to the suspension bolt 200 using a manipulator.

Here, the manipulator 300 is configured as an operating tool known as a magic hand. The manipulator 300 is equipped with a gripper 300I at the tip of a rod-shaped member (not shown) that is extendable and can be stretched to a length of several meters. An operating unit (not shown) that is operated by a worker (operator) is provided at the opposite end of the rod-shaped member. The gripper 300I opens and closes in response to the worker's opening and closing operation. Note that the mechanism by which the gripper 300I opens and closes in response to operation of the operating unit of the manipulator 300 is well known technology, and therefore will not be described here.

The size of the space RS (see Figure 2) formed between the warped portion 21 and the piece 30, i.e., the degree to which the warped portion 21 is warped from the piece 30, is set to a size that allows the tip 300R of the manipulator 300 to be opened and the vicinity of one end 30E1 of the piece 30 to be grasped. Here, the inclination angle of the warped portion 21 relative to the piece 30 is set to an angle that allows the tip 300R to be opened and closed.

First, the worker (operator) attaches the string 150 to the hole 100R in the liquid receiving sheet 100 and ties the string 150 to the double ring RR. Then, the double ring RR is attached to the hole 21R formed in the warped portion 21 of the piece 20. However, the double ring RR and string 150 are not shown in Figure 5.

Next, the worker carries the liquid receiving sheet 100 with the clips 10 attached to it into the ceiling space through a ceiling inspection hatch or similar. He grasps the vicinity of one end 30E1 of the piece 30 of the clip 10 with the tip 300R of the manipulator 300 and extends the rod-shaped member of the manipulator 300. He then extends the manipulator 300 toward the target suspension bolt 200.

The worker attaches the clip 10 to the suspension bolt 200 by pulling the manipulator 300 from the rear side of the suspension bolt 200 toward the front side as seen from the worker's perspective. To clamp the suspension bolt 200 while sliding it from one end 20E1, 30E1 of the pair of pieces 20, 30, the clip 10 is moved to the rear side of the suspension bolt 200, and then the manipulator 300 is pulled from there.

In Figure 2, the position of the suspension bolt 200 when the clip 10 is located further back than the suspension bolt 200 as seen by the operator is indicated by the symbol F1. By pulling the manipulator 300 toward the operator, the clamping member 15 comes into contact with the suspension bolt 200 and opens. The manipulator 300 is then pulled back past the contact point CT with the piece 30 of the warped portion 21, climbs over the restricting member 25, and reaches a position where it comes into contact with the connecting portion 50. Figure 5 shows the suspension bolt 200 climbing over the restricting member 25.

Figure 2 shows the hanging bolt 200 with the clips 10 attached. The clamping member 15 clamps the hanging bolt 200 while it is housed between the restricting members 25, 35 and the connecting portion 50. The restoring force of the spring 40 firmly fixes and positions the clips 10 to the hanging bolt 200. The installation work for the liquid receiving sheet 100 is completed when the worker attaches all of the clips 10 to the target hanging bolts 200 at the specified positions (heights).

On the other hand, when removing or reinstalling the liquid receiving sheet 100, the worker grasps the piece 30 of the clip 10 attached to the suspension bolt 200 with the manipulator 300. Then, the manipulator 300 is pushed toward the back of the suspension bolt. This opens the clamping member 15, and the clip 10 is removed from the suspension bolt 200.

According to this embodiment, the clip 10 for supporting the liquid receiving sheet 100 with the hanging bolt 200 includes a clamping member 15 made up of a pair of pieces 20, 30, and is configured to be able to open and close around the axis of the connecting part 50 using a spring 40. One of the pieces 20 is formed with a curved portion 21 so that the tip 300R of the manipulator 300 can grasp the piece 30. The curved portion 21 also has a hole 21R formed therein for connecting the string 150 tied to the liquid receiving sheet 100.

The ceilings of buildings and other structures often have limited space due to the installation of power lines, communication lines, water supply and sewage pipes, air conditioning pipes, and related equipment, resulting in a small work area. Furthermore, the location of the suspension bolt 200 to be attached may be far from the ceiling inspection hatch. However, because the clip 10 is attached to the suspension bolt 200 using the manipulator 300, the liquid receiving sheet 100 can be easily installed in the ceiling.

In particular, the formation of the warped portion 21 on the piece 20 makes it easy to grasp and hold the piece 30 even when using a manipulator 300 equipped with a tip 300R that typically has a curved portion. Furthermore, by grasping the rearward side (connector 50 side) of the piece 30 near the end 30E1, the clip 10 can be stably held when attaching it to the suspension bolt 200. For example, Figure 2 shows the state in which the end 30E1 of the piece 30 is grasped by the parallel portion of the tip 300R that contacts the piece 30, but it is also possible to grasp a portion near the restricting members 25, 35. This is because the warped portion 21 widens the distance between the pair of pieces 20, 30, creating space to accommodate the curved portion formed on the tip 300R (extending from the grasping portion toward the operator). This allows for more stable holding of the clip 10.

The shape of the tip 300R of the gripping portion 300I of the manipulator 300 may be other than that shown in Figure 5. For example, there are manipulators that have a tip that is composed only of a curved portion, without the shape of the tip 300R of the gripping portion 300I of the manipulator 300 (as shown in Figure 5, which does not have parallel gripping portions). The shape and formation position of the warped portion 21 relative to the piece 20, such as the position and inclination angle of the contact portion CT of the warped portion 21 with the piece 30, can be determined according to the shape of the tip 300R of the manipulator 300.

In addition, the clip 10 is attached to the hanging bolt 200 by pulling the manipulator 300 from the back side of the hanging bolt, making it resistant to tensile forces toward the sheet and providing a stable fixing point for the liquid receiving sheet 100. In other words, the weight of the liquid receiving sheet 100 exerts a force that pulls the piece 20 of the clip 10 toward the sheet, but the connecting portion 50 of the clip 10 abuts against the hanging bolt 200 and is clamped between the protrusions (regulating members 25, 35) and the connecting portion 50, thereby providing stable support for the liquid receiving sheet 100.

On the other hand, when removing the clip 10 from the suspension bolt 200, the manipulator 300 is pushed toward the back of the suspension bolt, allowing the clip 10 to be easily removed. Because there is strong resistance to pulling forces toward the operator and weak resistance in the direction of pushing the manipulator 300, the attachment position of the clip 10 relative to the suspension bolt 200 can be easily adjusted.

In the clip 10 of this embodiment, the restricting members 25, 35 form convex portions on the surfaces 20S, 30S of the pair of pieces 20, 30. This restricts the relative movement of the clip 10 with the suspension bolt 100 clamped against the convex portions, allowing the clip 10 to stably maintain a state in which it firmly clamps the suspension bolt 200. It is also possible to provide a step on the surfaces 20S, 30S of the pair of pieces 20, 30 as a convex portion, sufficient to allow the clip 10 to be removed, and this may be configured to restrict the relative movement of the clip 10.

In addition, the positions of the restricting members 25, 35 are adjustable along the longitudinal direction of the pair of pieces 20, 30, so the positions of the restricting members 25, 35, i.e., the positions of the convex portions, can be determined according to the size (diameter) of the hanging bolt 200, etc.

Edge-like edges 20G, 30G are formed along the longitudinal direction of the pair of pieces 20, 30, respectively. These edges 20G, 30G engage with threaded portions (external threads) formed on the surface of the suspension bolt 200. This prevents the clip 10 from shifting up and down (vertically) while clamping the suspension bolt 200, and allows the clip 10 to be more firmly positioned relative to the suspension bolt 200. Note that the edge-like edges 20G, 30G may be formed on only one edge of the pieces 20, 30, rather than on both edges along the longitudinal direction.

The clamping member 15 of the clip 10 is not limited to being composed of a pair of pieces 20, 30, but can also be composed of a plate-like member folded into an elastic body. The clip 10 may also be configured to hold a member other than the liquid receiving sheet 100, such as a base material hanging hanger.

In this embodiment, the clip 10 is configured to be attachable to the hanging bolt 200 above the ceiling, but even when a protective sheet is to be attached to the ceiling surface, a rod-shaped member attached to the ceiling surface or a rod-shaped member attached to the ceiling surface can be used to support the protective sheet with the clip 10. Alternatively, when installing an emergency fall prevention net, the clip can be used to install the net in a location that is out of reach of ladders and the like.

Furthermore, the clip 10 can also be used for purposes other than buildings. For example, the clip 10 can be used to hang vinyl tent roofs, hammocks, etc., on racks when outdoors or camping.

REFERENCE SIGNS LIST 10 Clip 15 Clamping member 20 Piece 30 Piece 40 Spring 50 Connecting portion 100 Liquid receiving sheet 200 Hanging bolt 300 Manipulator

Claims (9)

a clamping member provided with a spring and a pair of pieces that can be opened and closed around the connecting portion as an axis;
One of the pieces has a warped portion extending in a direction away from the other piece so that the manipulator can grasp the other piece, and an engaging portion for connecting directly or indirectly with the workpiece,
the spring applies a force to close the sides of the pair of pieces on which the warped portions and the engaging portions are formed,
A clip, characterized in that the clamping member is capable of clamping a suspension bolt between the warped portion and the connecting portion. In the pair of pieces, convex portions facing each other are formed between the warped portion and the connecting portion,
The clip according to claim 1, wherein the hanging bolt can be sandwiched between the protrusion and the connecting portion. A clip as described in claim 2, characterized in that the position of the protrusion is adjustable along the longitudinal direction of the pair of pieces. A clip as described in claim 1, characterized in that one end of the curved portion is in contact with the other piece. A clip as described in claim 1, characterized in that the pair of pieces have edges that can engage with the male threaded portion of the hanging bolt. A clip as described in claim 1, characterized in that the engagement portion is configured as a hole. A method for hanging a liquid receiving sheet on a hanging bolt using the clip according to any one of claims 1 to 6, comprising:
The liquid receiving sheet is directly or indirectly connected to the engaging portion of the clip,
The other piece of the clip is clamped by the tip of the manipulator,
The manipulator is pulled from the rear side of the suspension bolt toward the front side as viewed from the manipulator operator so that the suspension bolt passes between the pair of pieces;
A method for hanging a liquid receiving sheet, comprising: attaching the clip to the hanging bolt. A method for attaching a workpiece to a rod-shaped member using the clip according to any one of claims 1 to 6, comprising the steps of:
The workpiece is connected directly or indirectly to the engaging portion of the clip,
The other piece of the clip is clamped by the tip of the manipulator,
the manipulator is pulled from the rear side of the rod-shaped member toward the front side as viewed from the manipulator operator so that the rod-shaped member passes between the pair of pieces;
A method for installing a workpiece, comprising: attaching the clip to the rod-shaped member. an elastic clamping member capable of clamping a rod-shaped member;
One end of the clamping member expands so that it can be grasped by a manipulator,
An engaging portion for directly or indirectly connecting to the workpiece is formed on one end side of the expanding clamping member,
A clip characterized in that a rod-shaped member can be slid from one end side of the expanding clamping member to clamp the rod-shaped member.