Insertion Device

Abstract

To provide a magnetic attraction tool that is more improved in convenience.SOLUTION: A magnetic attraction tool 100 is attached detachably to a shaft member to magnetically attract a magnetic object. The magnetic attraction tool 100 comprises: an attraction tool body 101 which extends from a base end to a tip; a connection part 103 which is formed on the base end side of the attraction tool body 101 to connect the tip of a shaft member detachably; and a magnetic attraction part 105 which applies magnetic force to outside the attraction tool body 101 so as to magnetically attract a magnetic object to a magnetic attraction tool outer surface at a position closer to the tip side of the attraction tool body 101 than the connection part 103.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an insert device that uses a magnetic attraction tool to magnetically attract a magnetic object. [Background technology]

[0002] In the past, workers had to bend down and manually pick up nails, pieces of iron, etc. that had fallen to the ground. In response to this, a technology has been proposed that uses a jig with a magnet to attract nails, pieces of iron, etc.

[0003] For example, Patent Document 1 discloses a hammer with a nail-retrieving function that attracts and retrieves nails from a nail bag worn on the waist. In the following paragraphs, the reference numerals of Patent Document 1 are shown in parentheses. The hammer with a nail-retrieving function (Ha) comprises a metal hammer body (1) to which a wooden handle (2) is attached, a hole (5) drilled in the base end surface of the handle (2), and a magnet (3) embedded in the hole (5). To retrieve a nail (9) from a nail bag (V) using the hammer (Ha), the base end of the handle (2) is inserted into the nail bag and then pulled up. The nail (9) is then attracted to the magnet (3), allowing the worker to transfer it to their left hand and drive the nail. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-176858 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the hammer with nail removal function (magnetic attraction tool) of Patent Document 1 has various problems because the magnet is fixed to the handle of the tool. For example, when magnetic objects such as iron filings or iron chips are attracted to the handle of the tool, the worker has to manually remove the magnetic objects from the tool each time they are used. Furthermore, because the handle length is fixed, there are problems such as the inability to pick up nails or iron chips that have fallen in narrow spaces. In other words, conventional magnetic attraction tools have an issue in that they cannot fully utilize their convenience.

[0006] The present invention has been made to solve the above-mentioned problems, and its object is to provide a magnetic attraction tool that is more convenient to use, and an insert device that uses the magnetic attraction tool. [Means for solving the problem]

[0007] A magnetic attraction tool according to one embodiment of the present invention is a magnetic attraction tool that is detachably attached to a shaft member and is used to magnetically attract a magnetic object, and includes: a suction tool body extending from a base end to a tip end; a connecting portion formed on a base end side of the suction tool body for detachably connecting the tip of the shaft member; The magnetic attracting portion is characterized by exerting a magnetic force on the outside of the suction tool body to magnetically attract a magnetic object to the outer surface of the magnetic attracting device at a position closer to the tip of the suction tool body than the connecting portion.

[0008] A further form of the magnetic attraction device of the present invention is characterized in that, in the magnetic attraction device of the above form, the connection portion has an opening through which the tip of the shaft member can be inserted, and is configured to be pressed against the outer peripheral surface of the shaft member inserted through the opening.

[0009] A further form of the magnetic attraction device of the present invention is characterized in that, in the magnetic attraction device of the above form, the connection portion is formed from an elastic material and has an annular portion extending in the axial direction of the shaft member inserted through the opening, and the annular portion is pressed against the outer surface of the shaft member while expanding and deforming in accordance with the outer peripheral shape of the shaft member.

[0010] A further form of the magnetic attraction device of the present invention is characterized in that, in the magnetic attraction device of the above form, a socket having an outer peripheral shape with a polygonal cross section is provided at the tip of the shaft member, and the annular portion of the connection part is capable of expanding and deforming in diameter to match the outer shape of the socket.

[0011] A further form of the magnetic attraction device of the present invention is characterized in that, in the magnetic attraction device of the above form, the connection portion is configured to be able to be disconnected by forcibly moving the attraction device main body in a direction away from the tip of the shaft member along the axial direction of the shaft member.

[0012] A magnetic attracting device according to a further aspect of the present invention is the magnetic attracting device according to the above aspect, wherein the magnetic attracting portion includes a magnet and a magnet holding portion that holds the magnet on the attracting device main body, The suction tool body is characterized by having a restricting portion formed between the connection portion and the magnet holding portion, which restricts the tip of the shaft member connected to the connection portion from abutting against the magnet held in the magnet holding portion.

[0013] A magnetic attraction device according to a further aspect of the present invention is characterized in that, in the magnetic attraction device according to the above aspect, the regulating portion comprises a partition wall that separates the connecting portion and the magnet holding portion inside the attraction device main body.

[0014] A further aspect of the magnetic attraction device of the present invention is characterized in that, in the magnetic attraction device of the above aspect, the connection portion is formed so as to be press-fitted into a polygonal socket hole or a round hole provided at the tip of the shaft member.

[0015] A magnetic attraction tool according to a further embodiment of the present invention is the magnetic attraction tool according to the above embodiment, further comprising an exterior body having an action surface that covers the magnetically attracted portion from the outside and that is movably supported by the attraction tool body, The outer casing is characterized in that it can be displaced between a reference position in which a magnetic object can be magnetically attracted to the action surface by magnetic force from the magnetic attraction portion, and a separated position in which the action surface is relatively separated from the magnetic attraction portion.

[0016] A further form of the magnetic attraction device of the present invention is characterized in that, in the magnetic attraction device of the above form, the attraction device main body has a cylindrical shape extending in the axial direction, the magnetic attraction portion is formed at the tip of the attraction device main body, and the outer body is formed in a bottomed cylindrical shape with the working surface on the outer surface of the bottom wall, and slides along the axial direction relative to the attraction device main body.

[0017] A magnetic attraction tool according to a further aspect of the present invention is the magnetic attraction tool according to the above aspect, further comprising a locking means for selectively locking the exterior body at the reference position and / or the separated position relative to the attraction tool body, The locking state by the locking means can be released or established by rotating the exterior body relative to the suction tool body in the axial direction.

[0018] A further form of the magnetic attraction device of the present invention is characterized in that, in the magnetic attraction device of the above form, the outer surface of the magnetic attraction device to which the magnetic object is attracted comprises a flat surface and a protruding step portion protruding from a part of the flat surface.

[0019] The insert device of one aspect of the present invention comprises the magnetic attracting tool of the above aspect, which has a flat surface at its tip for magnetically attracting a magnetic object; an insert comprising: an insert body extending in an axial direction so as to be inserted into a through-hole of a form; a top wall made of a magnetic material formed at a base end of the insert body and magnetically attachable to the flat surface of the magnetic attraction device; and a fastening means formed at a tip end side of the insert body for fastening to the periphery of the through-hole of the form; A protruding step portion is provided on a part of the flat surface of the magnetic attraction tool to restrict lateral sliding of the insert magnetically attracted to the magnetic attraction tool. [Effects of the Invention]

[0020] According to one embodiment of the magnetic attraction device of the present invention, the magnetic attraction device can be attached to and detached from any shaft member via a connecting portion formed on the base end side, and the magnetic attraction portion can magnetically attract a magnetic object to the outer surface of the magnetic attraction device on the distal side of the connecting portion. In other words, the magnetic attraction device can be detachably attached to a shaft member selected depending on the situation, and the desired magnetic attraction force can be applied to the shaft member. Therefore, the magnetic attraction device of the present invention improves the convenience of applications in which a shaft member is used to magnetically attract magnetic objects.

[0021] According to a further form of magnetic attraction device of the present invention, in addition to the effects of the above invention, the magnetic attraction device can be easily attached and detached to the shaft member by inserting the shaft member into the connection portion through the opening or by pulling the shaft member out of the connection portion through the opening.

[0022] According to a magnetic attraction device of a further aspect of the present invention, in addition to the effects of the invention described above, the connecting portion is made of an elastic material, so that it can be adapted to shaft members having various outer peripheral shapes.

[0023] According to a magnetic attraction tool of a further aspect of the present invention, in addition to the effects of the invention described above, the magnetic attraction tool can be easily attached by covering the socket having a polygonal cross section of the shaft member with the connecting portion.

[0024] According to a further form of magnetic attraction device of the present invention, in addition to the effects of the above invention, the connection between the magnetic attraction device and the shaft member can be released by the simple operation of forcibly moving the attraction device body in a direction away from the tip of the shaft member along the axial direction of the shaft member.

[0025] According to a further form of magnetic attraction device of the present invention, in addition to the effects of the above-mentioned invention, the restricting portion can prevent the tip of the shaft member connected to the connecting portion from coming into contact with the magnet and damaging the magnet.

[0026] According to a magnetic attracting device of a further embodiment of the present invention, in addition to the effects of the invention described above, a partition wall inside the main body can prevent the tip of the shaft member connected to the connection part from coming into contact with the magnet and damaging the magnet. Furthermore, because the partition wall prevents the magnet from being exposed to the outside from the connection part, iron powder that enters from the connection part side can be prevented from directly adhering to the magnet. This makes cleaning easier because even if iron powder enters from the connection part side, it will not directly adhere to the magnet.

[0027] According to a further form of magnetic attraction device of the present invention, in addition to the effects of the above-mentioned invention, the magnetic attraction device can be connected to the shaft member by pressing the connecting portion into a polygonal socket hole or a round hole provided at the tip of the shaft member.

[0028] According to a further embodiment of the magnetic attraction device of the present invention, in addition to the effects of the invention described above, it is possible to magnetically attract a magnetic object to the working surface when the exterior body is in the reference position. On the other hand, since the magnetic attraction force on the working surface is weakened when the exterior body is displaced to the separated position, it is possible to selectively create a situation in which the magnetic attraction device does not attract or has difficulty attracting a magnetic object. In other words, by operating the magnetic attraction device, it is possible to easily remove a magnetic object magnetically attracted to the working surface from the magnetic attraction device without touching it with one's hand.

[0029] According to a further form of magnetic attraction device of the present invention, in addition to the effects of the above invention, the magnetic attraction device can be made compact by inserting a cylindrical attraction device main body into a bottomed cylindrical outer body and making it axially sliding type.

[0030] According to a magnetic attraction device of a further embodiment of the present invention, in addition to the effects of the invention described above, the magnetic attraction device can be stably maintained in a magnetically attracted state and / or a non-magnetically attracted state by the locking means. Also, the engagement state can be easily established or released by the simple operation of rotating the exterior body relative to the main body.

[0031] According to a magnetic attraction device of a further embodiment of the present invention, in addition to the effects of the above invention, the coexistence of a flat surface and a protruding step on the outer surface of the magnetic attraction device makes it possible to magnetically attract a magnetic object at a position set back from the protruding step. In other words, the flat surface and the magnetic object can be magnetically attracted in a state where they are relatively spaced apart, thereby suppressing the occurrence of physical friction or pressure between them.

[0032] According to one embodiment of the insert device of the present invention, the effects of the magnetic attraction device of the above-described invention can be achieved as an insert device. That is, according to the insert device, the insert is held by the magnetic attraction device using magnetic force while the protruding step restricts the insert from sliding sideways. Then, the insert can be easily attached to the formwork by operating the shaft member to which the magnetic attraction device is attached and pushing the insert together with the magnetic attraction device into the through-hole of the formwork. Furthermore, because the magnetic attraction device and the insert are connected by magnetic force, the magnetic attraction device can be easily removed from the insert after the insert is attached to the formwork. [Brief explanation of the drawings]

[0033] [Figure 1] 1A is a schematic perspective view of a magnetic attraction device according to an embodiment of the present invention, as viewed from above, and FIG. 1B is a schematic perspective view of a magnetic attraction device according to an embodiment of the present invention, as viewed from below. [Figure 2] (a) Plan view, (b) bottom view, (c) front view, and (d) side view of the magnetic attractor of Figure 1 . [Figure 3] (a) AA cross-sectional view and (b) BB cross-sectional view of the magnetic attractor in Figure 2. [Figure 4] 3 is a cross-sectional view of the magnetic attraction device shown in FIG. 2 along CC. [Figure 5]2A and 2B are schematic perspective views of a modified non-magnetic form of the magnetic attraction device of FIG. 1, respectively, as viewed from above and below; [Figure 6] (a) Plan view, (b) bottom view, (c) front view, and (d) side view of the magnetic attractor of FIG. 5 . [Figure 7] (a) DD cross-sectional view and (b) EE cross-sectional view of the magnetic attractor in Figure 6 . [Figure 8] FIG. 7 is a cross-sectional view of the magnetic attraction tool of FIG. 6 . [Figure 9] 2A and 2B are front and NN cross-sectional views, respectively, of an intermediate form between the magnetically attached form and the non-magnetically attached form of the magnetic attracting device of FIG. 1 ; [Figure 10] FIG. 2 is an exploded perspective view of the magnetic attraction device of FIG. 1. [Figure 11] 1A is a schematic perspective view of an attracting tool body of a magnetic attracting tool according to one embodiment of the present invention, as viewed from above, and FIG. 1B is a schematic perspective view of an attracting tool body of a magnetic attracting tool according to one embodiment of the present invention, as viewed from below. [Figure 12] 12A to 12D are (a) a plan view, (b) a bottom view, (c) a front view, and (d) a side view of the suction tool body of FIG. 11. [Figure 13] 13A and 13B are cross-sectional views of the suction tool body of FIG. 12 taken along line GG and line HH, respectively. [Figure 14] 13A is a cross-sectional view taken along line II, FIG. 13B is a cross-sectional view taken along line JJ, and FIG. 13C is a cross-sectional view taken along line KK of the suction tool body of FIG. [Figure 15] 1A is a schematic perspective view of an exterior body of a magnetic attraction tool according to one embodiment of the present invention, as viewed from above, and FIG. 1B is a schematic perspective view of an exterior body of a magnetic attraction tool according to one embodiment of the present invention, as viewed from below. [Figure 16] 16A and 16B are (a) plan view, (b) bottom view, (c) front view, and (d) side view of the exterior body of FIG. 15. [Figure 17] 17A and 17B are cross-sectional views of the exterior body of FIG. 16 taken along line LL and line MM, respectively. [Figure 18] 3 is a schematic diagram showing a first example of mounting the magnetic attraction tool of the present embodiment to a shaft member. FIG. [Figure 19] 5 is a schematic diagram showing a second example of mounting the magnetic attraction tool of the present embodiment to a shaft member. FIG. [Figure 20]1A is a schematic diagram showing a state in which a magnetic object is magnetically attracted by the magnetic attraction device of the present embodiment, and FIG. 1B is a schematic diagram showing a state in which the magnetic attraction of the magnetic object is released. [Figure 21] 1 is an exploded perspective view showing an insert device according to an embodiment of the present invention; [Figure 22] 22 is a schematic longitudinal cross-sectional view of the insert device of FIG. 21. [Figure 23] 23 is a schematic cross-sectional view of an installation structure in which the insert of FIG. 22 is attached to a through hole in a deck plate. [Figure 24] 24 is a schematic diagram showing the process of constructing the installation structure of FIG. 23. [Figure 25] FIG. 10 is a diagram showing a magnetic attraction device according to another embodiment of the present invention. [Figure 26] FIG. 10 is a diagram showing a magnetic attraction device according to another embodiment of the present invention. [Figure 27] FIG. 10 is a diagram showing a magnetic attraction device according to another embodiment of the present invention. [Figure 28] FIG. 10 is a diagram showing a magnetic attraction device according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0034] An embodiment of the present invention will be described below with reference to the drawings. Note that the shapes of the drawings referred to in the following description are conceptual or schematic diagrams for explaining preferred shapes and dimensions, and the dimensional ratios do not necessarily correspond to the actual dimensional ratios. In other words, the present invention is not limited to the dimensional ratios in the drawings.

[0035] The magnetic attraction tool 100 of one embodiment of the present invention is detachably attached to a shaft member such as a tool handle or a pipe, and is used to magnetically attract magnetic objects. In this embodiment, examples of magnetic objects that can be magnetically attracted by the magnetic attraction tool 100 include nails, iron filings, iron pieces, and inserts, but the magnetic objects are not limited to these and include all objects that can be magnetically attracted as needed.

[0036] First, the overall configuration of the magnetic attraction device 100 of this embodiment will be described with reference to FIGS. 1 to 10. FIGS. 1 to 4 show the magnetic attraction device 100 in a magnetically attracted form capable of magnetically attracting a magnetic object. FIGS. 5 to 8 show the magnetic attraction device 100 in a non-magnetically attracted form, which is deformed from the magnetically attracted form and does not magnetically attract a magnetic object. Specifically, FIGS. 1(a) and 1(b) are schematic perspective views of the magnetic attraction device 100 of this embodiment in a magnetically attracted form. FIGS. 2(a) to 2(d) are plan, bottom, front, and side views of the magnetic attraction device 100. FIGS. 3(a) and 3(b) are AA and BB cross-sectional views of the magnetic attraction device 100. FIG. 4 is a CC cross-sectional view of the magnetic attraction device 100. FIGS. 5(a) and 5(b) are schematic perspective views of the magnetic attraction device 100 in a non-magnetic form. FIGS. 6(a) to 6(d) are plan, bottom, front, and side views of the magnetic attraction device 100 in a non-magnetic form. 7(a) and (b) are a DD cross-sectional view and an EE cross-sectional view of the magnetic attraction tool 100 in the non-magnetic form. FIG. 8 is an FF cross-sectional view of the magnetic attraction tool 100 in the non-magnetic form. FIG. 9(a) and (b) are a front view and an NN cross-sectional view of the magnetic attraction tool 100 in the intermediate form. FIG. 10 is an exploded perspective view of the magnetic attraction tool 100.

[0037] As shown in FIGS. 1 to 4, the magnetic attraction device 100 has an overall cylindrical shape extending axially from the base end to the tip. The base end of the magnetic attraction device 100 is open, and the tip is closed. The magnetic attraction device 100 also includes an attraction device main body 101 and an exterior body 110 wrapped around the attraction device main body 101. The exterior body 110 is movably supported by the attraction device main body 101. The magnetic attraction device 100 can magnetically attract a predetermined magnetic object when it is in the magnetically contracted form shown in FIGS. 1 to 4. The magnetic attraction device 100 can also transform into an axially elongated non-magnetic form as shown in FIGS. 5 to 8. This non-magnetic form is not intended to magnetically attract a magnetic object. The magnetic attraction device 100 can also transform into an axially elongated non-magnetic form as shown in FIG. 9, which is an intermediate form, by axially moving the exterior body 110 relative to the attraction device main body 101. The attracting tool main body 101 and the exterior body 110 are detachably assembled as shown in Fig. 10. Before describing the configuration of the magnetic attracting tool 100 in detail, the structures of the attracting tool main body 101 and the exterior body 110 that constitute the magnetic attracting tool 100 will be described.

[0038] The suction instrument body 101 is shown in Figures 11 to 14. Figures 11(a) and (b) are schematic perspective views of the suction instrument body 101. Figures 12(a) to (d) are plan, bottom, front, and side views of the suction instrument body 101. Figures 13(a) and (b) are GG and HH cross-sectional views of the suction instrument body 101 taken along the axial direction. Figures 14(a) to (c) are II, JJ, and KK cross-sectional views of the suction instrument body 101 taken perpendicular to the axial direction.

[0039] The suction instrument body 101 has a hollow cylindrical shape extending axially from the base end to the tip. The base and tip ends of the suction instrument body 101 are open. The suction instrument body 101 includes a cylindrical peripheral wall portion 102 and an annular connecting portion 103 formed on the base end side of the peripheral wall portion 102. In this embodiment, the peripheral wall portion 102 is made of a hard synthetic resin material, while the connecting portion 103 is made of an elastic material such as rubber.

[0040] The connecting portion 103 is formed on the proximal end of the suction instrument body 101 and is configured to detachably connect to a shaft member. The connecting portion 103 can deform to accommodate various shapes of the tip of the shaft member. As shown in FIG. 13 , the connecting portion 103 is composed of an opening 103a that opens toward the axial tip, an annular portion 103b that is connected to the opening 103a and extends in the axial direction, a joining portion 103c that is joined to the outer surface of the peripheral wall portion 102 proximal to the annular portion 103b, and a partition wall 103d formed between the annular portion 103b and the joining portion 103c. The opening 103a is sized to allow the tip of the shaft member to be inserted without undergoing radial expansion or deformation. Furthermore, because the opening 103a is open in the axial direction, the connecting portion 103 can be disconnected by forcibly moving the suction instrument body 101 in the axial direction away from the tip of the shaft member. The annular portion 103b is configured to expand and deform in diameter in accordance with the outer peripheral shape of the shaft member, with its inner surface being pressed against the outer surface of the shaft member. The joining portion 103c can be integrally joined to the outer peripheral surface of the base end side of the peripheral wall portion 102 by elastic crimping, adhesive, or the like. The partition wall 103d extends across the entire cross section of the connecting portion 103 to separate the internal space of the annular portion 103b from the internal space of the peripheral wall portion 102, and functions as a restricting portion that restricts the shaft portion inserted into the connecting portion 103 from moving toward the peripheral wall portion 102.

[0041] As shown in FIG. 12(c), a U-shaped guide groove 106 and a straight guide groove 109 are recessed in the outer surface of the peripheral wall 102. The guide groove 106 and the guide groove 109 are formed in two locations, one on the front surface and one on the back surface of the outer surface of the peripheral wall 102. The guide groove 106 is a groove for guiding the axial and circumferential sliding movement of an engaging protrusion 115 of the exterior body 110, which will be described later. The guide groove 106 consists of a vertical groove extending in the axial direction and horizontal grooves extending in the circumferential direction from the base end (upper end) and the tip end (lower end) of the vertical groove. As shown in FIG. 14(a), the horizontal groove on the base end side of the guide groove 106 has a space capable of accommodating the engaging protrusion 115, and a first locking claw 107 is provided between the space and the vertical groove. As shown in FIG. 14(b), the horizontal groove on the tip side of guide groove 106 similarly has a space capable of accommodating engaging protrusion 115, and second locking claw 108 is provided between this space and the vertical groove. First locking claw 107 and second locking claw 108 prevent engaging protrusion 115 from moving in the circumferential direction, but are configured so that engaging protrusion 115 (which is relatively elastically displaced in the radial direction) can overcome the first locking claw 107 and second locking claw 108 when a circumferential force of a certain level or more is applied to engaging protrusion 115. In addition, introduction groove 109 communicates with the vicinity of the tip of the vertical groove of guide groove 106. Introduction groove 109 opens at the tip (lower end) of peripheral wall portion 102. Engaging protrusion 115 of exterior body 110 is introduced into guide groove 106 via introduction groove 109, thereby assembling exterior body 110 to suction tool body 101.

[0042] The tip of the suction device body 101 is provided with a magnetic attraction section 105 that exerts a magnetic force on the outside. The magnetic attraction section 105 is configured to magnetically attract a magnetic object to the outer surface of the magnetic attraction device 100, closer to the tip of the connection section 103 of the suction device body 101. More specifically, as shown in FIGS. 13(a), (b), and 14(c), the magnetic attraction section 105 includes a button-shaped magnet 105a and a magnet holder 105b that holds the magnet 105a on the suction device body 101. The magnet 105a is preferably selected from a strong permanent magnet such as a neodymium magnet. The magnet holder 105b is a space for holding the magnet 105a inside the peripheral wall 102. The magnet 105a may be fitted or glued to the inner surface of the peripheral wall 102. The magnet holder 105b is open at the tip of the suction device body 101. That is, magnet 105a is exposed from suction tool body 101 toward the tip so as to effectively exert its magnetic force to the outside. Also, as shown in Figure 14(c), magnet holder 105b is open at a portion in the radial direction so as to introduce magnet 105a into peripheral wall 102. On the other hand, partition 103d prevents magnet 105a from being exposed to the outside from connection portion 103, thereby preventing iron powder that enters from the connection portion 103 side from directly adhering to magnet 105a. This simplifies cleaning because iron powder that enters from the connection portion 103 side does not directly adhere to magnet 105a.

[0043] 14(a) and 14(b), a plurality of axially extending protrusions 102a are provided on the inner peripheral surface of the peripheral wall portion 102. The structural strength of the peripheral wall portion 102 is reinforced by the axially extending protrusions 102a.

[0044] The exterior body 110 is shown in Figs. 15 to 17. The exterior body 110 covers the tip portion of the suction tool body 101 and functions to protect the magnetically attached portion 105 (magnet 105a). Figs. 15(a) and (b) are schematic perspective views of the exterior body 110. Figs. 16(a) to (d) are plan, bottom, front, and side views of the exterior body 110. Figs. 17(a) and (b) are LL and MM cross-sectional views of the exterior body 110.

[0045] The exterior body 110 has a cylindrical shape with a bottom that extends axially from the base end to the tip. In this embodiment, the exterior body 110 is formed from a hard synthetic resin, although this is not a limitation of the present invention. The exterior body 110 has a cylindrical wall 111 that is circular in cross section and extends axially, and a bottom wall 112 that closes the tip of the cylindrical wall 111. The cylindrical wall 111 is open at the base end and has a size and shape that allows the tip portion of the suction tool body 101 to be inserted therein. The bottom wall 112 closes the tip of the cylindrical wall 111 so as to externally cover the magnetically attracted portion 105 of the suction tool body 101. The bottom wall 112 is formed as a flange that is larger than the outer diameter of the cylindrical wall 111. An action surface 113 that magnetically acts on a magnetic object is provided on the outer surface of the bottom wall 112. The action surface 113 is flat. In addition, the outer surface of the bottom wall 112 is provided with protruding steps 114 that protrude in a step-like manner from the action surface 113. The protruding steps 114 extend in an arc shape at two locations near the outer periphery of the outer surface of the bottom wall 112. For example, if the magnetic object is iron powder scattered on the ground, the protruding steps 114 function to keep the action surface 113 away from the magnetic object and the ground, thereby preventing the action surface 113 from being damaged by strong friction with the magnetic object or the ground. Furthermore, as will be described later, the protruding steps 114 also function to prevent the insert (see FIG. 20, etc.) magnetically attached to the action surface 113 from sliding sideways.

[0046] As shown in FIG. 17(b), a pair of engaging protrusions 115, 115 protruding from the inner circumferential surface toward the center is provided near the base end of the cylindrical wall 111 of the exterior body 110. The pair of engaging protrusions 115, 115 are arranged on the same diameter and face each other across the center. The engaging protrusions 115 have a shape and dimensions that allow them to slide in the vertical groove and horizontal groove of the guide groove 106. The engaging protrusions 115 are also slidable in the introduction groove 109. The engaging protrusions 115 cooperate with the first engaging claw 107 and the second engaging claw 108 in the guide groove 106 to function as a locking means that maintains the exterior body 110 in a predetermined shape relative to the suction tool body 101.

[0047] A grip portion 116 is formed to protrude from the outer circumferential surface of the cylindrical wall 111 of the exterior body 110. The grip portion 116 has a shape that allows an operator to place his or her fingers on it. A through-hole is formed in the center of the grip portion 116. The magnetic attraction device 100 may be carried by a user by passing a strap or the like through this through-hole.

[0048] Arrow-shaped display unit 117 is formed on the outer peripheral surface of cylindrical wall 111 of exterior body 110. Display unit 117 visually instructs the user how to operate exterior body 110 on suction tool body 101. Specifically, when the user operates exterior body 110 along the arrow, exterior body 110 can be locked to suction tool body 101.

[0049] Based on the above description of the attracting device main body 101 and the exterior body 110, the magnetic attracting device 100 in the magnetically attracted form, the non-magnetically attracted form, and the intermediate form will be described in more detail.

[0050] In the magnetic attracting device 100 of this embodiment, the attracting device main body 101 and the exterior body 110 are assembled in a nested structure so that the cylindrical, bottomed exterior body 110 covers the tip portion of the cylindrical attracting device main body 101 from the outside. Two engaging protrusions 115 of the exterior body 110 fit into two guide grooves 106 of the attracting device main body 101, thereby movably and detachably supporting the exterior body 110 on the attracting device main body 101. Furthermore, the magnet 105a is isolated from the outside by the partition wall 103d of the connecting part 103 and the exterior body 110, which prevents iron powder and the like from being magnetically attracted to the magnet 105a.

[0051] In the magnetic attraction device 100 in the magnetic attachment form shown in Figures 1 to 4, the action surface 113 of the exterior body 110 is located at the position closest to the magnetic attachment portion 105 at the tip of the attraction device main body 101. This position is defined as the reference position. The action surface 113 covers the magnetic attachment portion 105 from its tip. Because the distance between the action surface 113 in the reference position and the magnetic attachment portion 105 (magnet 105a) is small, the action surface 113 can exert a magnetic force on the outside of the magnetic attraction device 100 and magnetically attract a magnetic object. In other words, in this magnetic attachment form, the magnetic attraction device 100 can magnetically attract a magnetic object to its outer surface.

[0052] The exterior body 110 is locked to the suction tool body 101 by a locking means so that the magnetic attraction tool 100 maintains its magnetically attracted state. Specifically, as shown in FIG. 4 , each of the engagement protrusions 115 of the exterior body 110 is housed in a horizontal groove on the tip side of each of the guide grooves 106 of the suction tool body 101. Because the engagement protrusions 115 are housed in the horizontal groove on the tip side of the guide grooves 106, the exterior body 110 cannot move toward the axial tip side (extension direction) relative to the suction tool body 101. Furthermore, a first locking claw 107 is present on the vertical groove side of the engagement protrusion 115. The first locking claw 107 locks the engagement protrusion 115, thereby restricting the engagement protrusion 115 from sliding within the vertical groove (i.e., restricting the exterior body 110 from rotating in the circumferential direction relative to the suction tool body 101). However, by rotating the exterior body 110 in the circumferential direction relative to the suction tool body 101 with a force greater than a certain level, the engaging protrusions 115 are elastically displaced radially outward relative to the suction tool body 101 and overcome the first locking claws 107, thereby releasing the locked state. As a result, the engaging protrusions 115 can move reciprocally between the horizontal groove and the vertical groove of the guide groove 106 when the user rotates the exterior body 110. That is, in the magnetically attached form, the magnetic attraction tool 100 can release or establish the locked state by the locking means by rotating the exterior body 110 relative to the suction tool body 101 in the axial direction.

[0053] In the magnetic attraction device 100 in the non-magnetic form shown in FIGS. 5 to 8, the action surface 113 of the exterior body 110 is located at the farthest position from the magnetically attracted portion 105 at the tip of the attraction device main body 101. This position is referred to as the separated position. The action surface 113 covers the magnetically attracted portion 105 from its tip. Because the distance between the action surface 113 in the separated position and the magnetically attracted portion 105 (magnet 105a) is sufficiently large, the magnetic force exerted by the action surface 113 on the outside of the magnetic attraction device 100 is weakened, and the action surface 113 cannot magnetically attract a magnetic object. In other words, in the non-magnetic form, the magnetic attraction device 100 does not magnetically attract a magnetic object, or can remove a magnetically attracted magnetic object from its outer surface.

[0054] The exterior body 110 is locked to the suction tool body 101 by a locking means so that the magnetic attraction tool 100 maintains a non-magnetic state. Specifically, as shown in FIG. 8 , each of the engagement protrusions 115 of the exterior body 110 is housed in a horizontal groove on the base end side of each of the guide grooves 106 of the suction tool body 101. Because the engagement protrusions 115 are housed in the horizontal groove on the base end side of the guide grooves 106, the exterior body 110 cannot move axially toward the base end side (shortening direction) relative to the suction tool body 101. In addition, a second locking claw 108 is present on the vertical groove side of the engagement protrusion 115. The second locking claw 108 locks the engagement protrusion 115, thereby restricting the engagement protrusion 115 from sliding within the vertical groove (i.e., restricting the exterior body 110 from rotating in the circumferential direction relative to the suction tool body 101). However, by rotating the exterior body 110 in the circumferential direction relative to the suction tool body 101 with a force greater than a certain level, the engaging protrusions 115 are elastically displaced radially outward and overcome the second locking claws 108, thereby releasing the locked state. As a result, the engaging protrusions 115 can move between the horizontal groove and the vertical groove of the guide groove 106 when the user rotates the exterior body 110. That is, the magnetic attraction tool 100 can release or establish the locked state by the locking means by rotating the exterior body 110 in the axial direction relative to the suction tool body 101 in the non-magnetic form.

[0055] To transform the magnetic attraction device 100 from the magnetically attracted state to the non-magnetically attracted state, the exterior body 110 is rotated clockwise around the axial direction relative to the attraction device body 101 to release the locked state. At this time, the engaging protrusion 115 enters the vertical groove of the guide groove 106. Then, through the intermediate state of the magnetic attraction device 100 shown in FIG. 9, the engaging protrusion 115 can be moved within the vertical groove of the guide groove 106, and the exterior body 110 can be slid axially toward the tip end relative to the attraction device body 101. As a result, the operating surface 113 can be moved from the reference position to the separated position relative to the magnetically attracted portion 105. Furthermore, to lock the magnetic attraction device 100 into the non-magnetic state, the exterior body 110 is rotated counterclockwise according to the arrow indicated by the indicator 117. Then, the engaging protrusion 115 is accommodated in the horizontal groove of the guide groove 106, and the locked state can be established. To transform the magnetic attraction device 100 from the non-magnetic form to the magnetic form, the above-described steps are performed in reverse order.

[0056] Next, the process of separating / assembling the exterior body 110 from the suction tool main body 101 will be described. In the separation process, in the intermediate form of the magnetic attraction tool 100 shown in FIG. 9 , the exterior body 110 is twisted to insert the engaging protrusion 115 from the vertical groove of the guide groove 106 into the introduction groove 109. Then, the engaging protrusion 115 is moved from the open end of the introduction groove 109 to the tip, thereby separating the suction tool main body 101 and the exterior body 110. To assemble the exterior body 110 to the suction tool main body 101, the suction tool main body 101 and the exterior body 110 are manipulated by hand in the reverse order of the above-described process to insert the engaging protrusion 115 into the introduction groove 109 from the open end, and then move the engaging protrusion 115 from the introduction groove 109 into the vertical groove of the guide groove 106, thereby assembling the suction tool main body 101 and the exterior body 110. Furthermore, since the introduction groove 109 is connected to a position spaced apart from the tip of the vertical groove of the guide groove 106, the engaging protrusion 115 is prevented from unintentionally moving from the guide groove 106 to the introduction groove 109, preventing the magnetic attraction device 100 from suddenly separating.

[0057] Next, with reference to FIGS. 18 and 19, examples of mounting the magnetic attraction device 100 on different shaft members will be described.

[0058] FIG. 18 shows a first mounting example in which the shaft member to which the magnetic attraction device 100 is attached is a socket S. As shown in FIG. 18, the shaft member is the socket S formed at the tip of the handle of a socketed hammer. The socket S has an outer circumferential shape with a polygonal (hexagonal) cross section. The socket S has imaginary circumscribing circles circumscribing each corner of the polygon. In other words, the circumscribing circle is defined so that its radius is the same as the distance between the center point and each corner. Here, the dimensions and shape of the connecting portion 103 are determined so that the inner diameter of the annular portion 103b of the connecting portion 103 is at least smaller than the diameter of the circumscribing circle of the socket S. This is because if the inner diameter of the annular portion 103b is larger than the diameter of the circumscribing circle of the socket S, a sufficient crimping effect cannot be obtained. In this embodiment, the outer diameter of the annular portion 103b is further determined to be smaller than the diameter of the circumscribing circle of the socket S. As shown in FIG. 18(b), the annular portion 103b of the connecting portion 103 elastically expands in diameter to conform to the irregular outer shape of the socket S and is crimped against its outer surface. Also, as shown in FIG. 18(c), the socket S is inserted into the annular portion 103b until it abuts against the partition wall 103d. In other words, the partition wall 103d prevents the tip of the socket S from abutting against the magnet 105a. That is, the magnetic attracting device 100 is stably connected to the socket S by the elastic crimping force of the connecting portion 103. This connection can be released by forcibly moving the magnetic attracting device 100 in a direction away from the socket S along the axial direction.

[0059] FIG. 19 shows a second mounting example in which the shaft member to which the magnetic attraction device 100 is attached is a pipe P. As shown in FIG. 19, the shaft member is a pipe P having a circular cross section. The pipe P is a cylindrical body having a predetermined outer diameter and a series of circles of the same outer diameter. The dimensions and shape of the connecting portion 103 are determined so that the inner diameter of the annular portion 103b of the connecting portion 103 is at least smaller than the outer diameter of the pipe P. This is because, if the inner diameter of the annular portion 103b is larger than the outer diameter of the pipe P, a sufficient crimping effect cannot be obtained. In this embodiment, the outer diameter of the annular portion 103b is also determined to be smaller than the outer diameter of the pipe P. As shown in FIG. 19(b), the annular portion 103b of the connecting portion 103 elastically expands and deforms to conform to the cylindrical pipe P having a series of circles of the same outer diameter, and is crimped to its outer surface. Furthermore, as shown in FIG. 19(c), the pipe P is inserted into the annular portion 103b until it abuts against the partition wall 103d. That is, the partition wall 103d prevents the tip of the pipe P from coming into contact with the magnet 105a. That is, the magnetic attraction device 100 is stably connected to the pipe P by the elastic pressure of the connection part 103. This connection can be released by forcibly moving the magnetic attraction device 100 in a direction away from the pipe P along the axial direction.

[0060] That is, the magnetic attracting device 100 can be easily attached to and detached from shaft members of various shapes, and can be used by replacing it with shaft members having various handle lengths. Also, users can attach the magnetic attracting device 100 to a pipe or a hammer and carry it around depending on the purpose.

[0061] The shaft member described here is merely an example, and it goes without saying that the magnetic attracting device 100 can be connected to various types of shaft members. Preferably, the shaft member may be a rigid polyvinyl chloride electrical conduit (designation: VE16, outer diameter: 22.0 mm) specified in JIS C8430:2019. Alternatively, the shaft member may be a steel electrical conduit (designation: G16 (outer diameter: 21.0 mm) thick steel electrical conduit, designation: G19 (outer diameter: 19.1 mm) thin steel electrical conduit, or designation: E19 (outer diameter: 19.1 mm) threadless electrical conduit) specified in JIS C8305:2019. Furthermore, the socket size of the socket hammer may be a hexagonal socket with a 17 mm opposite side, generally referred to as a 3-part socket (W3 / 8 socket) or M10 socket, attached to the end of the handle. In the magnetic attraction tool 100 of this embodiment, the connection part 103 is configured to be adaptable to both the above-mentioned three-part socket hammer and pipes with an outer diameter of 19 mm to 22 mm (VE16, G16, C19, E19 pipes).

[0062] Next, with reference to Fig. 20, a mechanism for magnetically attracting a magnetic object to the magnetic attraction portion 105 and removing the magnetically attracted magnetic object from the magnetic attraction portion 105 (without touching the magnetic object) in the magnetic attraction device 100 of this embodiment will be described. As shown in Fig. 20, the magnetic object is an iron piece X, but is not limited to this and may include any object such as an iron nail, iron powder, or iron sand.

[0063] As shown in FIG. 20(a), when the magnetically attracted magnetic attraction device 100 attached to the shaft member is brought close to a piece of iron X lying on the ground, the magnetic force leaking from the magnetic attraction portion 105 (action surface 113) of the magnetic attraction device 100 acts on the piece of iron X. As a result, the piece of iron X is magnetically attracted to the action surface 113, which is the outer surface of the magnetic attraction device 100. That is, by manipulating the shaft member, the user can magnetically attract the piece of iron X lying on the ground to the outer surface of the magnetic attraction device 100 and pick it up without bending over. By selecting the shaft member according to the application, the user can easily magnetically attract the piece of iron X lying in a narrow, hard-to-reach place. Here, the tip of the magnetic attraction device 100 is provided with a protruding step 114, which can reduce physical damage to the action surface 113 when the magnetic attraction device 100 is pressed against the ground if the magnetic object is iron powder or the like.

[0064] When the magnetic attraction tool 100 is operated to deform the iron piece X to a non-magnetic form as shown in FIG. 20(b), the distance between the magnet 105a and the action surface 113 increases, and the magnetic attraction force acting on the iron piece X from the magnetically attracted portion 105 (action surface 113) is significantly reduced. This releases the magnetic attraction of the iron piece X to the magnetic attraction tool 100, causing the iron piece X to fall freely from the outer surface (action surface 113) of the magnetic attraction tool 100. In other words, by simply extending the magnetic attraction tool 100, the user can remove the magnetic object magnetically attracted to the outer surface of the magnetic attraction tool 100 from the magnetic attraction tool 100 without touching it with their hands. Furthermore, since the magnetic attraction tool 100 can be easily detached from the shaft member, the long handle of the shaft member does not get in the way when removing the iron piece X (or iron powder). For example, it is possible to take only the magnetic attraction tool 100 that magnetically attracts the iron piece X (in a state where it is detached from the shaft member) to a trash can and dispose of the iron piece X.

[0065] For example, when a user drills a through hole in a steel plate such as a deck plate, the user can easily pick up and discard the iron powder and chips generated during drilling by performing the magnetic attraction process shown in Fig. 20(a) and the removal process shown in Fig. 20(b) as a series of operations. In particular, since the user can dispose of the iron powder and sharp chips without touching them, it is possible to prevent the user from getting their hands dirty or getting injured.

[0066] Next, as an application example of the magnetic attraction device 100 of this embodiment, a process of using the magnetic attraction device 100 to fit a magnetic object as an insert 11 into a through-hole of a deck plate Y serving as a formwork will be described with reference to Figs. 21 to 24. The insert 11 is typically attached to a through-hole of a deck plate Y disposed on a ceiling, and is used to support a hanging bolt for holding wiring, piping, etc. by threading it into the insert 11. In the present invention, the insert device 10 is a device for constructing an installation structure for the insert 11 on the deck plate Y (formwork) by using the magnetic attraction device 100 and the insert 11 cooperatively.

[0067] 21, the insert device 10 includes a magnetic attraction tool 100 and an insert 11 magnetically attached to the magnetic attraction tool 100. In the insert device 10, the magnetic attraction tool 100 is attached to an axial member such as a pipe or a tool handle, and functions to magnetically attach the base end of the insert 11 as a magnetic object.

[0068] The insert 11 comprises an insert body 11a, a top wall 11b, an upper clamping piece 11c, a lower clamping piece 11d, and a spring 11e. The insert body 11a is a hollow cylindrical body extending axially so as to be inserted into a through-hole in the deck plate Y and having a threaded groove on its inner surface. The top wall 11b is a flange extending radially outward from the base end of the insert body 11a. The top wall 11b is made of a magnetic material so as to be magnetically attracted by the magnetic attraction device 100. The upper clamping piece 11c is an annular plate movably fitted onto the insert body 11a and has a first clamping surface on its lower surface that abuts against the periphery of the through-hole. The lower clamping piece 11d is a protrusion that protrudes radially outward from the insert body 11a and has a second clamping surface on its upper surface that abuts against the periphery of the through-hole. The spring 11e is fitted onto the insert body 11a and is disposed in a compressed state between the top wall 11b and the upper clamping piece 11c. The spring 11e functions to bias the upper clamping piece 11c toward the tip. In other words, the upper clamping piece 11c, the lower clamping piece 11d, and the spring 11e are formed on the tip side of the insert body 11a and are fastening means for fastening to the periphery of the through hole in the deck plate Y.

[0069] 22, the top wall 11b of the insert 11 can be magnetically attached to the flat working surface 113 of the magnetic attraction device 100. In this magnetically attached state, the protruding step 114 is located radially outward of the top wall 11b and can engage with the side surface of the top wall 11b. That is, the protruding step 114 can function as a restricting portion that restricts the insert 11 from sliding sideways relative to the magnetic attraction device 100.

[0070] Figure 23 shows an installation structure in which an insert 11 is installed on a deck plate Y. As shown in Figure 23, an insert body 11a passes through a through hole in the deck plate Y. The elastic force of spring 11e clamps the periphery of the through hole between a first clamping surface of upper clamping piece 11c and a second clamping surface of lower clamping piece 11d, thereby fixing the insert 11 to the periphery of the through hole.

[0071] Next, with reference to FIG. 24, a method for constructing an installation structure using the insert device 10 will be described. As shown in FIG. 24, a user connects the magnetic attraction device 100 to a long shaft member S (illustrated as a socket-equipped tool S) and magnetically attaches the insert 11 to the outer surface (working surface 113) of the tip of the magnetic attraction device 100. This allows the user to hold and operate the shaft member S, the magnetic attraction device 100, and the insert 11 as a unit. The user then operates the shaft member S to press the insert 11 into the through-hole of the deck plate Y with a strong force, thereby elastically deforming the periphery of the through-hole and forcing the insert 11 into the through-hole, as shown in FIG. 23. During the forcing, the protruding step 114 at the tip of the magnetic attraction device 100 abuts against the side surface of the top wall 11b of the insert 11, thereby restricting the insert 11 from sliding sideways. This allows the user to stably transmit force through the insert device 10 and forcing the insert 11 into the through-hole. That is, the insert device 10 of this embodiment makes it possible to easily attach the insert 11 to the deck plate Y. Furthermore, since the magnetic attraction tool 100 and the insert 11 are connected only by magnetic force, the magnetic attraction tool 100 can be easily detached from the insert 11 after the insert 11 is attached to the deck plate Y.

[0072] The following describes the effects of the magnetic attraction device 100 according to one embodiment of the present invention.

[0073] The magnetic attraction device 100 of this embodiment can be attached to and detached from any shaft member via the connecting portion 103 formed on the base end side, and can magnetically attract a magnetic object to the outer surface of the magnetic attraction device 100 at a position distal to the connecting portion 103 using the magnetic attraction portion 105. That is, the magnetic attraction device 100 can be detachably attached to any shaft member depending on the situation, and a desired magnetic attraction force can be applied to the shaft member. Furthermore, the magnetic attraction device 100 includes an exterior body 110 that has an action surface 113 that covers the magnetic attraction portion 105 (magnet 105a) from the outside and is movably supported on the attraction device main body 101. When the exterior body 110 is in a reference position relative to the attraction device main body 101, a magnetic object can be magnetically attracted to the action surface 113. Meanwhile, when the exterior body 110 is displaced from the reference position to a separated position, the magnetic attraction force on the action surface 113 weakens, and therefore the magnetic attraction device 100 can selectively create a situation in which a magnetic object is not attracted to the outer surface or is easily attracted. That is, by operating the magnetic attraction tool 100, it becomes possible to easily remove the magnetic object magnetically attracted to the action surface 113 from the magnetic attraction tool 100 without touching it with one's hand. Therefore, the magnetic attraction tool 100 of this embodiment significantly improves the convenience in magnetic attraction applications using a shaft member.

[0074] The present invention is not limited to the above-described embodiment, and various embodiments and modifications are possible. Hereinafter, other embodiments of the present invention will be described. In each embodiment, components that share the same last two digits of a reference number have the same or similar characteristics, unless otherwise specified, and some of the description thereof will be omitted.

[0075] (1) The magnetic attraction device of the present invention is not limited to the above embodiment and can take various forms. In the magnetic attraction device of the above embodiment, the connection portion is formed as an elastically deformable ring-shaped body, but the present invention is not limited to the above embodiment. The magnetic attraction device 200 in FIG. 25 includes a connection portion 203 made of a solid elastic body. The connection portion 203 is formed in a cylindrical shape with dimensions that allow it to be press-fitted into the socket hole of the shaft member (socket S). The socket S has an imaginary inscribed circle inscribed in each side of a polygon. The outer diameter of the connection portion 203 is set to be larger than the diameter of the inscribed circle. As shown in FIGS. 25(b) and 25(c), the connection portion 203 deforms to follow the hexagonal shape of the inner surface of the socket S, thereby pressing against the inner surface of the hole of the socket S and connecting to the socket S. In other words, the magnetic attraction device 200 is stably connected to the socket S due to the elastic pressure force of the connection portion 203. This connection can be released by forcibly moving the magnetic attraction device 200 in the axial direction away from the socket S.

[0076] (2) The magnetic attracting device of the present invention is not limited to the above embodiment and can take various forms. In the magnetic attracting device of the above embodiment, the connecting portion utilizes elastic pressure contact force, but the present invention is not limited to the above embodiment. The connecting portion may be configured as a screwing means having an external or internal thread, in which case the shaft member has a corresponding threaded portion. By using a connection by a screwing means, it is possible to more firmly connect the magnetic attracting device to the shaft member. Furthermore, the connecting portion may be polygonal so as to fit into a polygonal hole in the socket of the shaft member. Alternatively, the connecting portion may be connected to the shaft member by a locking metal fitting.

[0077] (3) The magnetic attraction device of the present invention is not limited to the above embodiment and can take various forms. In the magnetic attraction device of the above embodiment, the exterior body is configured as a cylindrical sliding body with a bottom, but the present invention is not limited to the above embodiment. The magnetic attraction device 300 of FIG. 26 includes an attraction device main body 301 and an exterior body 310 that has an action surface 313 that externally covers the magnetic attraction portion 305 (magnet 305a) and is movably supported on the attraction device main body 301. The exterior body 310 is displaceable between a reference position where a magnetic object can be magnetically attracted to the action surface 313 by the magnetic force from the magnetic attraction portion 305, and a separated position where the action surface 313 is relatively separated from the magnetic attraction portion 305. In this embodiment, the exterior body 310 is a lid connected to the attraction device main body 301 by a hinge. The closed state of the lid as the exterior body 310 is the reference position, and the open position of the lid is the separated position. 26(a), when the exterior body 310 is in the reference position, the iron piece X as the magnetic object is magnetically attached to the action surface 313. As shown in FIG. 26(b), when the exterior body 310 is operated by a user and the exterior body 310 is in the separated position, the iron piece X falls freely from the action surface 313. That is, the user can remove the magnetic object magnetically attached to the outer surface of the magnetic attraction device 300 from the magnetic attraction device 300 without touching it with their hands, simply by opening the magnetic attraction device 300.

[0078] (4) The magnetic attraction device of the present invention is not limited to the above embodiment and can take various forms. In the magnetic attraction device of the above embodiment, the exterior body is configured as a cylindrical sliding body with a bottom, but the present invention is not limited to the above embodiment. The magnetic attraction device 400 of FIG. 27 includes an attraction device main body 401 and an exterior body 410 that has an action surface 413 that externally covers the magnetic attraction portion 405 (magnet 405a) and is movably (detachably) supported on the attraction device main body 401. The exterior body 410 is displaceable between a reference position where a magnetic object can be magnetically attracted to the action surface 413 by the magnetic force from the magnetic attraction portion 405, and a separated position where the action surface 413 is relatively separated from the magnetic attraction portion 405. In this embodiment, the exterior body 410 is a cap fitted to the attraction device main body 401. The state in which the cap is fitted as the exterior body 410 is the reference position, and the position in which the cap is removed is the separated position. 27(a), when the exterior body 410 is in the reference position, the iron piece X as the magnetic object is magnetically attached to the action surface 413. As shown in FIG. 27(b), when the exterior body 410 is operated by the user and the exterior body 410 is in the separated position, the iron piece X falls freely from the action surface 413. In other words, the user can remove the magnetic object magnetically attached to the outer surface of the magnetic attraction device 400 from the magnetic attraction device 400 without touching it with their hands, simply by performing a separation operation on the magnetic attraction device 400.

[0079] (5) The magnetic attraction device of the present invention is not limited to the above embodiment and can take various forms. In the magnetic attraction device of the above embodiment, the exterior body is configured as a cylindrical sliding body with a bottom, but the present invention is not limited to the above embodiment. The magnetic attraction device 500 of FIG. 28 includes an attraction device main body 501 and an exterior body 510 that has an action surface 513 that externally covers the magnetic attraction portion 505 (magnet 505a) and is movably supported on the attraction device main body 501. The exterior body 510 is displaceable between a reference position where a magnetic object can be magnetically attracted to the action surface 513 by the magnetic force from the magnetic attraction portion 505 and a spaced position where the action surface 513 is spaced relatively from the magnetic attraction portion 505. In this embodiment, the exterior body 510 is screwed to the attraction device main body 501. A threaded portion is provided on the outer surface of the peripheral wall portion 502 of the attraction device main body 501, and a threaded portion is provided on the outer surface of the cylindrical wall 511 of the exterior body 510. The state in which the exterior body 510 is screwed to the base end side is the reference position, and the position in which the exterior body 510 is screwed to the tip end side is the separated position. As shown in FIG. 28(a), when the exterior body 510 is in the reference position, the iron piece X as the magnetic object is magnetically attached to the action surface 513. As shown in FIG. 28(b), when the exterior body 510 is screwed by the user and the exterior body 510 is in the separated position, the iron piece X falls freely from the action surface 513. In other words, the user can remove the magnetic object magnetically attached to the outer surface of the magnetic attraction device 500 from the magnetic attraction device 500 without touching it with their hands, simply by extending the magnetic attraction device 500.

[0080] (6) The magnetic attraction tool of the present invention is not limited to the above embodiment and can take various forms. The magnetic attraction tool does not have to have an outer casing. That is, even in such a form of magnetic attraction tool, the attraction tool main body having the magnetic attraction part is connected to the shaft member via the connection part, so that it is at least possible to magnetically attract a magnetic object and impart a desired magnetic attraction force to the shaft member.

[0081] (7) The magnetic attracting tool of the present invention is not limited to the above embodiment and may take various forms. In the above embodiment, the magnetic attracting tool is formed into a hollow cylindrical shape extending in the axial direction, but the present invention is not limited to this. For example, the magnetic attracting tool may be solid. Furthermore, the magnetic attracting tool may be arbitrarily bent or curved, such as L-shaped.

[0082] The present invention is not limited to the above-described embodiments and modifications, and can be implemented in various forms within the technical scope of the present invention. [Explanation of symbols]

[0083] 10 Insertion device 11 Insert (magnetic object) 11a Insert body 11b Top wall 11c Upper clamping piece (fixing means) 11d Lower clamping piece (fixing means) 11e Spring (fixing means) 100 Magnetic attractor 101 Suction device body 102 Peripheral wall section 102a Projection 103 Connection 103a opening 103b Circular region 103c Joint site 103d Bulkhead (regulatory part) 105 Magnetized part 105a Magnet 105b Magnet holding part 106 Guide groove 107 First locking claw (locking means) 108 Second locking claw (locking means) 109 Introduction groove 110 Exterior body 111 Cylinder wall 112 Bottom wall 113 Action surface 114 Protruding step 115 Engagement protrusion (locking means) 116 Gripping part 117 Display section S socket (shaft member) P pipe (shaft member) X Iron piece (magnetic object) Y deck plate (formwork)

Claims

[Claim 1] a magnetic attracting tool having a flat surface at a tip end for magnetically attracting a magnetic object, the magnetic attracting tool being detachably attached to the shaft member, and for magnetically attracting the magnetic object; an insert comprising: an insert body extending in an axial direction so as to be inserted into a through-hole of a form; a top wall made of a magnetic material formed at a base end of the insert body and magnetically attachable to the flat surface of the magnetic attraction device; and a fastening means formed at a tip end side of the insert body for fastening to the periphery of the through-hole of the form; The magnetic attraction tool is a suction tool body extending from a base end to a tip end; a connecting portion formed on a base end side of the suction tool body for detachably connecting the tip of the shaft member; a magnetic attraction portion that exerts a magnetic force on the outside of the suction tool body to magnetically attract a magnetic object to the outer surface of the magnetic attraction tool at a position closer to the tip end than the connection portion of the suction tool body, An insert device characterized in that the flat surface of the magnetic attraction tool forms a portion that continues to the outer edge, and a protruding step portion is provided on a portion of the flat surface to restrict lateral sliding of the insert that is magnetically attracted to the magnetic attraction tool.

Images