A method for lifting an object, and the lifting members used in said method.

Abstract

To provide a method or the like capable of reducing working labor and working time in lifting an object to be lifted.SOLUTION: A method for lifting an object to be lifted, which includes the steps of attaching a lifting member to the object to be lifted and connecting lifting means to the lifting member so as to lift the object to be lifted, features that: as the lifting member, a lifting member 1 is used which includes a lifting section 9 connecting the lifting means 8 and an engaging section 13 passing through a through hole 12 provided in a plate section 11 of the object 10 to be lifted and engaging with a lower surface 11b of the plate section 11 around the through hole 12; the engaging section 13 of the lifting member 1 is brought into engagement with the lower surface 11b of the plate section 11 around the through hole 12 after being passed through the through hole 12 provided in the plate section 11 of the object 10 to be lifted; and the object 10 to be lifted is lifted by connecting the lifting means 8 to the lifting section 9 of the lifting member 1.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a method for lifting an object to be lifted using a suspension member, and a suspension member used in the method.

Background Art

[0002] For example, an opening / closing device called an over-sliding door or an overhead door is known (see Patent Document 1, etc.). In the opening / closing device, an opening / closing body for opening and closing an opening of a structure is set to a closed state in which it extends in the vertical direction to close the opening, and an open state in which it extends along the ceiling on the ceiling side of one region separated from the opening to open the opening. The above-described opening / closing body is composed of panels as a plurality of opening / closing body constituent members arranged along the moving direction of the opening / closing body, and an upper and lower panel adjacent to each other is connected via a hinge. As a method for assembling the opening / closing body of the above-described opening / closing device, for example, first, the lowermost panel is installed on an installation surface, and then panels are sequentially stacked thereon and connected. In this way, when connecting by stacking panels from below to above, the panel to be located above needs to be lifted using a lifting machine such as a hoist or a winch. At this time, for example, as shown in FIG. 7, a suspension member 100 provided with a suspension portion 99 for connecting a suspension means 8 such as a suspension rope suspended from a lifting machine is attached to a panel as an object to be lifted 10. In addition, the suspension member 100 may be attached to an opening / closing device, which is the object to be lifted 10, and the opening / closing device may be lifted. For example, as shown in Figure 8, an opening / closing device, such as a window shutter, may be lifted, which is constructed by assembling a winding section 10b, a shutter curtain 10c as the opening / closing element, and an opening / closing mechanism (not shown) into a shutter case (opening / closing element housing case) 10a of the opening / closing device. In this case, as shown in Figure 8(a), the suspension member 100 is attached to a through hole 12 formed in the plate portion 11 of the shutter case 10a of the opening / closing device to lift the opening / closing device, and then, as shown in Figure 8(b), the opening / closing device is attached to a mounting target part 110 such as a wall. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-10137 [Overview of the project] [Problems that the invention aims to solve]

[0004] However, conventionally, a screw-type suspension member 100 was used as the suspension member 100 described above. Therefore, as shown in Figure 7, for example, it was necessary to provide a nut 101 on the lower side (back side) of the through hole 12 formed in the plate portion 11 of the object to be lifted, that is, on the lower surface (back side) 11b of the plate portion 11 around the through hole 12. This resulted in increased labor and time for tasks such as attaching the nut 101 and attaching the suspension member 100 by screwing it onto the nut 101, making the work complicated.

[0005] In order to solve the above problems, the present invention provides a method for lifting an object that can reduce the amount of work involved and the time required for the lifting process. [Means for solving the problem]

[0006] The method for lifting an object according to the present invention is a method for lifting an object, wherein a lifting member is attached to the object to be lifted, and a lifting means is connected to the lifting member to lift the object, and the lifting member is a lifting member, The main unit and It has a suspension portion that connects to the aforementioned suspension means, and a locking portion that penetrates a through hole provided in the plate portion of the object to be lifted and engages with the lower surface of the plate portion around the through hole. When the suspension portion is not pulled up relative to the main body, the locking portion is maintained in a state where it is housed within the main body by the elastic member. When the suspension portion is pulled up relative to the main body, the locking portion protrudes outward from the main body against the elastic force of the elastic member, and when the pulled-up suspension portion returns downward, the locking portion is housed within the main body by the elastic member. Using the suspension members of the configuration, The aforementioned Suspension member Main unit This is passed through a through hole provided in the plate portion of the object to be lifted. Afterward, the suspension portion is pulled up relative to the main body, causing the locking portion to protrude to the outside of the main body. The method is characterized by securing the suspension member to the lower surface of the plate portion surrounding the through-hole, and connecting the suspension means to the suspension portion of the suspension member to lift the object to be lifted. Furthermore, the object to be lifted is characterized by being an opening / closing body component of an opening / closing device, or an opening / closing body of an opening / closing device, or an opening / closing device including an opening / closing body and a winding section for said opening / closing body, or an opening / closing device mounting unit configured by attaching said opening / closing device to a mounting member. The method for lifting an object according to the present invention makes it possible to reduce the amount of work involved and the amount of time spent on the work. Furthermore, the lifting member used in the lifting method for an object to be lifted, which constitutes the opening and closing body according to the present invention, comprises a main body, an operating member, a plurality of locking members, and a detachable part. The main body is composed of a hollow cylindrical member having a housing portion for housing the locking members. The hollow cylindrical member comprises a lower solid portion located below the housing portion, an upper solid portion located above the housing portion, a shaft insertion hole that penetrates the upper solid portion vertically, and a plurality of openings provided in the outer peripheral wall between the lower solid portion and the upper solid portion, which communicate the housing portion with the outside. The operating member comprises an operating shaft provided to penetrate the shaft insertion hole, and an opening and closing mechanism provided at the lower end of the operating shaft located below the upper solid portion and housed in the housing portion. The device comprises an operating body and a suspension portion provided at the upper end of an operating shaft located above the upper solid portion. The locking member is attached to the opening edge of the opening via a hinge mechanism so as to be rotatable between a closed state where it is housed within the housing and an open state where it protrudes outward from the housing through the opening, and is configured to maintain the closed state by an elastic member. The detachable portion is provided so as to extend from the upper end side of the hollow cylindrical member, and is configured such that when the hollow cylindrical member is inserted into the through hole from the lower end side and the suspension portion is pulled upward when the opening is located below the lower surface of the plate portion, the opening / closing operating body contacts the locking member and maintains the locking member in the open state. The lifting member used in the lifting method for an object according to the present invention makes it possible to realize a lifting method for an object that can reduce the amount of work and time required. [Brief explanation of the drawing]

[0007] [Figure 1] A diagram illustrating a method for lifting an object (an embodiment). [Figure 2] These are perspective views showing the suspension member, where (a) shows the suspension member when the locking member is in the closed position, and (b) shows the suspension member when the locking member is in the open position (embodiment). [Figure 3] Longitudinal cross-sectional view of the suspension member (embodiment). [Figure 4]Cross-sectional view AA of Figure 2(a) (embodiment). [Figure 5] A diagram (embodiment) showing the procedure for attaching the lifting member to the object to be lifted. [Figure 6] A diagram illustrating the procedure for removing the lifting member from the object being lifted (embodiment). [Figure 7] A diagram illustrating a conventional method for lifting objects. [Figure 8] A diagram illustrating a conventional method for lifting objects. [Modes for carrying out the invention]

[0008] A method for lifting an object to be lifted according to an embodiment of the present invention is a method for lifting an object to be lifted, such as a panel as an opening / closing component of an opening / closing device called an overhead sliding door or the like, or an opening / closing device called a window shutter or the like, as shown in Figure 1, by attaching a lifting member 1 to the upper end plate portion 11 of the object to be lifted 10, and connecting a lifting means 8 such as a lifting rope to the lifting member 1 to lift the object to be lifted, wherein the lifting member 1 is The method involves using a suspension member 1 having a suspension portion 9 to which the suspension means 8 is connected, and a locking portion 13 that passes through a through hole 12 provided in the plate portion 11 on the upper end side of the object to be lifted 10 and locks onto the lower surface (back surface) 11b of the plate portion 11 surrounding the through hole 12. The locking portion 13 of the suspension member 1 is passed through the through hole 12 provided in the plate portion 11 of the object to be lifted 10 and locked onto the lower surface 11b of the plate portion 11 surrounding the through hole 12, and the suspension means 8 is connected to the suspension portion 9 of the suspension member 1 to lift the object to be lifted. In Figure 1, the panel described above is shown as the object to be lifted (10).

[0009] As shown in Figures 2 to 4, the suspension member 1 described above comprises, for example, a main body 2, an operating member 3, a plurality of locking members 4, 4, and a detachable part 5. In this specification, up, down, left, right, front, and back are defined and explained as the directions shown in Figures 2 to 4.

[0010] The main body 2 is constituted by, for example, a hollow columnar member 2A having a housing portion 20 which serves as a housing space for housing the locking members 4, 4 and an opening / closing operation portion 31 described later. The hollow columnar member 2A includes a columnar lower solid portion 21 positioned below the housing portion 20, a columnar upper solid portion 22 positioned above the housing portion 20, a shaft insertion hole 23 penetrating the upper solid portion 22 vertically, a plurality of openings 25, 25 provided on the outer peripheral wall 24 between the lower solid portion 21 and the upper solid portion 22 and communicating the housing portion 20 with the outside, and a regulating portion 26 provided on the outer periphery of the upper solid portion 22 and contacting the upper surface 11a around a through hole 12 provided in a plate portion 11 of the lifting object 10.

[0011] The shaft insertion hole 23 is a hole formed with a hole diameter slightly larger than the shaft diameter of an operation shaft 30 described later so as to allow the operation shaft 30 to move vertically therethrough, and is formed by a through hole having a circular cross section centered on the central axis 2C of the hollow columnar member 2A. The openings 25, 25 are formed so as to penetrate the outer peripheral wall 24 at positions separated from each other by 180° in the circumferential direction of the outer peripheral wall 24 of the hollow columnar member 2A. That is, two openings 25, 25 are arranged on the outer peripheral wall 24 of the hollow columnar member 2A so as to face each other with the central axis 2C of the hollow columnar member 2A interposed therebetween. The shape and size of the opening 25 are formed corresponding to the shape and size of the back surface 43 of the locking member 4 described later. Also, the upper side of the upper solid portion 22 is formed as a large-diameter portion 22a and the lower side of the upper solid portion 22 is formed as a small-diameter portion 22b. That is, the outer periphery of the upper solid portion 22 is provided with an annular regulating surface 26A as a regulating portion 26 formed by a step surface between the large-diameter portion 22a and the small-diameter portion 22b. That is, the outer diameter dimensions of the lower solid portion 21, the outer peripheral wall 24, and the small-diameter portion 22b of the upper solid portion 22 of the hollow columnar member 2A are formed to be smaller than the hole diameter dimension of the through hole 12, and the outer diameter dimension of the large-diameter portion 22a of the upper solid portion 22 is formed to be larger than the hole diameter dimension of the through hole 12. That is, the hollow cylindrical member 2A includes a lower portion that penetrates through the through-hole 12 provided in the plate portion 11 of the object 10 to be lifted, and an upper portion that does not penetrate through the through-hole 12. The lower portion is composed of the lower solid portion 21, the outer peripheral wall 24, and the small-diameter portion 22b of the upper solid portion 22 of the hollow cylindrical member 2A, and the upper portion is composed of the large-diameter portion 22a of the upper solid portion 22.

[0012] The operating member 3 includes an operating shaft 30 provided so as to penetrate through the shaft insertion hole 23, an opening / closing operating body 31 provided at the lower end of the operating shaft 30 positioned below the upper solid portion 22 and housed in the housing portion 20, and a hanging portion 9 provided at the upper end of the operating shaft 30 positioned above the upper solid portion 22. The opening / closing operating body 31 is, for example, constituted by a sphere. The hanging portion 9 is, for example, constituted by an annular body (ring). That is, the operating member 3 is configured to include the hanging portion 9 at the upper end (one end) of the operating shaft 30 and the opening / closing operating body 31 at the lower end (the other end) of the operating shaft 30.

[0013] Locking members 4 are respectively provided in the openings 25, 25 so as to block the openings 25. The locking member 4 is attached to the hollow cylindrical member 2A via a hinge mechanism 40 so as to be rotatable between a closed state housed in the housing portion 20 and an open state protruding outward from the housing portion 20, and is configured to be maintained in the closed state by an elastic member. The locking member 4 includes, for example, a lower end portion 42 provided so that a hinge shaft 41 serving as the rotation center of the hinge mechanism 40 penetrates therethrough, a back surface 43 positioned on the same plane as the outer peripheral surface of the outer peripheral wall 24 of the hollow cylindrical member 2A in the closed state, a locking surface 44 that functions as a locking portion 13 locked to the lower surface (back surface) 11b of the plate portion 11 on the upper end side of the object 10 to be lifted in the open state, and a support surface 45 that contacts the opening / closing operating body 31 and supports the opening / closing operating body 31 in the open state.

[0014] Furthermore, it is preferable that the locking surface 44, which serves as the locking portion 13, becomes a horizontal plane when the locking member 4 is set to the open position and makes surface contact with the lower surface 11b of the plate portion 11.

[0015] The hinge mechanism 40 is configured as follows: For example, the hinge shaft 41, which serves as the rotation center of the hinge mechanism 40, is fixed to the lower end portion 42 of the locking member 4, and one end and the other end of the hinge shaft 41 are rotatably attached to the left and right side edge surfaces 27, 27 at the opening edge of the opening 25. Alternatively, the hinge shaft 41, which serves as the rotation center of the hinge mechanism 40, is provided so as to pass through the lower end portion 42 of the locking member 4, and one end and the other end of the hinge shaft 41 are fixed to the left and right side edge surfaces 27, 27 of the opening edge of the opening 25, thereby rotatably attaching the locking member 4 to the hinge shaft 41.

[0016] The detachable portion 5 is provided so as to extend from the outer circumference of the upper end of the hollow cylindrical member 2A that constitutes the main body 2. The detachable portion 5 is composed of, for example, an inverted conical annular member centered on the central axis 2C of the hollow cylindrical member 2A.

[0017] The bottom surface 20b of the housing section 20, formed by the upper surface of the lower solid portion 21 located below the housing section 20, has an opening / closing operating body seating portion 20x formed in a hemispherical recess into which the opening / closing operating body 31 fits and sits. Furthermore, the upper surface 20t of the housing section 10, formed by the lower surface of the upper solid portion 22 located above the housing section 20, has an upper positioning section 20y formed in an arc-shaped recess into which the opening / closing operating body 31 fits and restricts the upward movement of the operating shaft 30.

[0018] The two locking members 4, 4 described above are arranged in the housing 20 so as to face each other across the central axis 2C of the hollow cylindrical member 2A, and the upper ends of the opposing locking members 4, 4 are connected by, for example, two coil springs 46, 46 which act as elastic members. For example, one end of a coil spring 46 is attached to an end attachment portion 47a provided on the upper end side of one locking member 4, and the other end of the coil spring 46 is attached to an end attachment portion 47b provided on the upper end side of the other locking member 4. In other words, the locking members 4, 4 are attached to the left and right side edge surfaces 27, 27 of the opening edge of the opening 25 via hinge mechanisms 40, 40 so that they can rotate between a closed state where they are housed within the housing 20 and an open state where they protrude outward from the housing 20 through the openings 25, 25, and the closed state is maintained by coil springs 46, 46 which act as elastic members. As shown in Figure 4, for example, the two coil springs 46, 46 are arranged parallel to each other with the operating shaft 30 in between. For example, as shown in Figure 4, one coil spring 46 has one end attached to an end attachment portion 47a provided on the front surface of the upper end of one locking member 4, and the other end attached to an end attachment portion 47b provided on the front surface of the upper end of the other locking member 4, and the other coil spring 46 has one end attached to an end attachment portion 47a provided on the rear surface of the upper end of one locking member 4, and the other end attached to an end attachment portion 47b provided on the rear surface of the upper end of the other locking member 4.

[0019] In the closed state of the locking member 4, the operating shaft 30 passes between the two opposing locking members 4, 4, and the opening / closing operating body 31 is seated on the opening / closing operating body seating portion 20x. The two locking members 4, 4 are housed in the housing portion 20 by the spring force of the two coil springs 46, 46. In other words, under normal circumstances, the locking members 4, 4 are closed by the spring force of the two coil springs 46, 46.

[0020] Furthermore, when the operating shaft 30 of the operating member 3 is pulled upward and the opening / closing operating body 31 is positioned on the upper positioning part 20y, the opening / closing operating body 31 comes into contact with the two locking members 4, 4, and the two locking members 4, 4 rotate via the hinge mechanism 40, 40, thereby setting the locking members 4, 4 to an open state where they protrude outward from the openings 25, 25. In other words, when the locking members 4, 4 are in the open position, the opening / closing operating body 31 is positioned on the upper positioning part 20y, and the spring force of the coil springs 46, 46 holds the opening / closing operating body 31 between the support surfaces 45, 45 of the two locking members 4, 4, preventing it from falling naturally (see Figure 5(c)).

[0021] Next, the method for attaching and detaching the suspension member 1 will be explained based on Figures 5 and 6. First, as shown in Figure 5(a), the hollow cylindrical member 2A of the suspension member 1 is inserted from the lower end side into the through hole 12 of the plate portion 11 of the object to be lifted 10, as indicated by arrow a, and the restricting surface 26A is brought into contact with the upper surface 11a around the through hole 12 in the plate portion 11 of the object to be lifted 10, as shown in Figure 5(b). When inserting the hollow cylindrical member 2A of the suspension member 1 into the through hole 12, it is preferable for the worker to grasp the attachment / detachment part 5 (see Figure 6). Then, as shown by arrow b, the suspension portion 9 is pulled upward from the state shown in Figure 5(b), thereby setting the locking members 4, 4 to the open state as shown in Figure 5(c), and locking the locking surfaces 44, 44 of the locking members 4, 4 to the lower surface 11b around the through hole 12 in the plate portion 11. In other words, the locking surfaces 44, 44 of the locking members 4, 4, which are provided on the lower part of the hollow cylindrical member 2A and set to an open state through the openings 25, 25 that pass through the through hole 12, function as locking portions 13, 13. Specifically, the hollow cylindrical member 2A is inserted into the through hole 12 from the lower end side, and with the openings 25, 25 positioned below the lower surface 11b of the plate portion 11, the suspension portion 9 is pulled upward, causing the opening / closing operating body 31 to contact the locking members 4, 4 and maintain the locking members 4, 4 in the open state. Furthermore, when pulling the suspension part 9 upward, the operator can easily and reliably set the locking members 4, 4 to the open position by lightly holding down the attachment / detachment part 5 while doing so. With the above steps, the suspension member 1 is attached to the plate portion 11 of the object to be lifted 10. Then, after connecting a lifting means 8, such as a lifting rope, to the lifting portion 9 of the lifting member 1 attached to the object to be lifted 10, the object to be lifted 10 can be lifted using a lifting machine. As described above, by using the suspension member 1 of the embodiment, the suspension member 1 can be easily attached to the plate portion 11 of the object to be lifted 10, making it possible to lift the object to be lifted 10 easily and quickly. In other words, by using the suspension member 1 according to this embodiment, the labor and time required for attaching the suspension member 1 in the method of lifting the object to be lifted 10 that constitutes the opening and closing body can be reduced compared to conventional methods, thereby realizing an efficient method for lifting the object to be lifted.

[0022] Furthermore, after the lifting operation of the object to be lifted 10 is completed, the lifting means 8 that was connected to the lifting part 9 of the lifting member 1 is detached. Subsequently, as shown in Figure 6(a), the suspension part 9 is returned downward as indicated by arrow c, and the opening / closing operating body 31 is seated on the opening / closing operating body seating part 20x, thereby setting the locking members 4, 4 to the closed position by the spring force of the coil springs 46, 46. Subsequently, as shown in Figure 6(b), worker W grasps the detachable part 5 and removes the suspension member 1 from the through hole 12. In other words, since the suspension member 1 is equipped with a detachable part 5, the suspension member 1 can be easily and reliably removed from the object to be lifted 10.

[0023] In other words, since the lifting member 1 is equipped with a detachable part 5, the operation of attaching and detaching it from the through hole 12 formed in the plate portion 11 of the object to be lifted 10 can be performed easily and reliably.

[0024] In addition, although the suspension member 1 described above is exemplified as having an annular suspension portion 9, the suspension portion may be hook-shaped or the like, and any configuration is acceptable as long as the suspension means 8 is connected. Furthermore, although the suspension member 1 described above is exemplified as having a spherical opening / closing operating body 31, the opening / closing operating body may have a shape other than a sphere.

[0025] Furthermore, the suspension member used in the method of the present invention may be configured such that the locking member is always protruding to the outside of the main body due to the elastic force of the elastic member, and when the main body is passed through the through hole 12, the locking member is pressed against the edge of the through hole 12 and housed inside the main body, and after the locking member has passed through the through hole, the locking member protrudes to the outside of the main body due to the elastic force of the elastic member and locks to the lower surface of the plate portion. In other words, the suspension member used in the method of the present invention may be any suspension member having a suspension portion and a locking portion that penetrates a through hole provided in the plate portion of the object to be lifted and locks into the lower surface of the plate portion around the through hole.

[0026] In Figure 1, a panel is shown as an example of the object to be lifted 10. However, the object to be lifted 10 may also be an opening / closing device, as shown in Figure 8, that is, an opening / closing device consisting of a shutter case (opening / closing body housing case) 10a of an opening / closing device such as a window shutter, with a winding section 10b, a shutter curtain 10c as the opening / closing body, and an opening / closing mechanism (not shown) assembled to it. In this case, the suspension member 1 according to the present invention described above may be used instead of the suspension member 100 shown in Figure 8(a).

[0027] Furthermore, the object to be lifted may be the components of the shutter curtain, such as slats, or the shutter curtain itself.

[0028] Furthermore, the object to be lifted may also be an opening / closing device mounting unit, which is configured in which the opening / closing device described above is pre-attached to a mounting member such as a wall panel.

[0029] Furthermore, the object to be lifted does not have to be a component or device that makes up the opening and closing mechanism. In other words, the object to be lifted can be any plate portion 11 that has a through hole 12 through which the locking portion 13 of the lifting member 1 passes. [Explanation of Symbols]

[0030] 1 Hanging member 2 Main unit 2A Hollow cylindrical member 3 Operating Member 4 Locking member 5 Detachable part 8 Hanging means 9 Hanging part 10 Objects to be lifted 11 Board part 12 Through holes 13 Locking part 20 storage compartments, 21. Lower solid section 22 Upper solid section 23 Shaft insertion hole 24 Outer wall 25 Opening 30 Operation axis 31 Opening / closing mechanism 40 Hinge mechanism 46. ​​Coil spring (elastic material)

Claims

1. A method for lifting an object, comprising attaching a lifting member to the object to be lifted, and connecting a lifting means to the lifting member to lift the object to be lifted, The suspension member used comprises a main body, a suspension portion connecting the suspension means, and a locking portion that penetrates a through hole provided in the plate portion of the object to be lifted and engages with the lower surface of the plate portion surrounding the through hole, wherein when the suspension portion is not pulled up relative to the main body, the locking portion is maintained in a state where it is housed within the main body by an elastic member, and in conjunction with the suspension portion being pulled up relative to the main body, the locking portion protrudes outward from the main body against the elastic force of the elastic member, and in conjunction with the lifted suspension portion returning downward, the locking portion is housed within the main body by the elastic member. A method for lifting an object to be lifted, comprising an opening / closing body, characterized in that the main body of the lifting member is passed through a through hole provided in the plate portion of the object to be lifted, the lifting portion is pulled up relative to the main body so that the locking portion protrudes to the outside of the main body and locks into the lower surface of the plate portion surrounding the through hole, and the lifting means is connected to the lifting portion of the lifting member to lift the object to be lifted.

2. A method for lifting an object constituting an opening / closing device according to claim 1, characterized in that the object to be lifted is an opening / closing device component, or an opening / closing device, or an opening / closing device including an opening / closing device and a winding part of said opening / closing device, or an opening / closing device mounting unit configured by attaching said opening / closing device to a mounting member.

3. A lifting member used in the lifting method for an object to be lifted according to claim 1 or claim 2, It comprises a main body, an operating member, multiple locking members, and a detachable part. The main body is composed of a hollow cylindrical member having a housing portion for housing the locking member, The hollow cylindrical member comprises a lower solid portion located below the housing portion, an upper solid portion located above the housing portion, a shaft insertion hole that penetrates the upper solid portion vertically, and a plurality of openings provided in the outer peripheral wall between the lower solid portion and the upper solid portion, which communicate the housing portion with the outside. The operating member comprises an operating shaft provided so as to penetrate the shaft insertion hole, an opening / closing operating body provided at the lower end of the operating shaft located below the upper solid portion and housed in the housing, and a suspension portion provided at the upper end of the operating shaft located above the upper solid portion. The locking member is attached to the opening edge of the opening via a hinge mechanism so as to be rotatable between a closed state where it is housed within the housing and an open state where it protrudes outward from the housing through the opening, and is configured such that the closed state is maintained by an elastic member. The detachable portion is provided so as to extend from the upper end side of the hollow cylindrical member, A suspension member characterized in that, when the hollow cylindrical member is inserted into the through hole from the lower end and the opening is positioned below the lower surface of the plate portion, the suspension portion is pulled upward, causing the opening / closing operating body to contact the locking member and maintain the locking member in the open state.

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