Powder leakage suppression mechanism for line drawing tool, cap for line drawing tool, and line drawing tool

Abstract

Provided are a powder leakage suppression mechanism for a line drawing tool, a cap for a line drawing tool, and a line drawing tool in which powder leakage suppression performance is improved. The powder leakage suppression mechanism for a line drawing tool is provided in a line drawing tool used for line drawing using the transfer of powder attached to a flexible wire (2). The mechanism comprises: a wiping member (5) for wiping the flexible wire to which powder is attached; and an accommodation space (S) capable of accommodating the wiping member (5). A portion of the accommodation space (S) is formed by a peripheral wall surface (F1) that can hold the wiping member (5) and is thinner toward a pull-out port (A1) from which the flexible wire wiped by the wiping member (5) can be pulled out.

Description

Powder leakage prevention mechanism for wire drawing tool, wire drawing tool cap, and wire drawing tool

[0001] This application claims priority to Japanese Patent Application No. 2024-057441, filed on March 29, 2024, the entire contents of which are incorporated herein by reference.

[0002] Wire drawing tools are used in the construction industry, for example, for drawing wires by transferring powder attached to a flexible wire. A known conventional wire drawing tool, for example, is one that has a cap with a drawing outlet (thread-releasing outlet) and a squeezing member (powder seal) for squeezing the flexible wire (thread) to which powder is attached, thereby preventing leakage of powder from the drawing outlet (see, for example, Patent Document 1).

[0003] Japanese Patent Application Laid-Open No. 2003-300181

[0004] However, the conventional wire drawing tool has room for further improvement in terms of improving the powder leakage suppression performance, that is, the performance of suppressing powder leakage.

[0005] An object of the present disclosure is to provide a powder leakage suppression mechanism for a wire drawing tool, a cap for the wire drawing tool, and a wire drawing tool that have improved powder leakage suppression performance.

[0006] (1) The powder leakage suppression mechanism for a wire drawing tool disclosed herein is a powder leakage suppression mechanism for a wire drawing tool provided in a wire drawing tool used for wire drawing using the transfer of powder adhering to a flexible wire, and includes a squeezing member for squeezing the flexible wire to which the powder is adhered, and a storage space capable of accommodating the squeezing member, with a portion of the storage space tapering toward a withdrawal opening through which the flexible wire squeezed by the squeezing member can be withdrawn and formed by a peripheral wall surface capable of holding the squeezing member.

[0007] (2) In the powder leakage suppression mechanism for a wire drawing tool described above in (1), the peripheral wall surface may be a conical surface.

[0008] (3) In the powder leakage suppression mechanism for a wire drawing tool according to either (1) or (2) above, it is preferable to provide a clearance between the squeezing member and the peripheral wall surface.

[0009] (4) In the powder leakage suppression mechanism for a wire drawing tool described above in (3), at least one rib extending toward the drawing opening may be provided on the peripheral wall surface.

[0010] (5) In the powder leakage suppression mechanism for a wire drawing tool described above in (4), the rib may be a semi-cylindrical rib.

[0011] (6) In the powder leakage suppression mechanism for a wire drawing tool described in (4) or (5) above, the circumferential width of the rib may increase toward the drawing opening.

[0012] (7) The disclosed wire drawing tool cap is a wire drawing tool cap that can be attached to the main body of a wire drawing tool used for wire drawing using the transfer of powder adhering to a flexible wire, and is equipped with a squeezing member for squeezing the flexible wire to which the powder is adhered, a storage space that can accommodate the squeezing member, and a withdrawal port that can withdraw the flexible wire that has been squeezed by the squeezing member, and a portion of the storage space is formed by a peripheral wall surface that tapers toward the withdrawal port and can hold the squeezing member.

[0013] (8) In the cap for a wire drawing tool described above in (7), the peripheral wall surface may be a conical surface.

[0014] (9) In the cap for the wire drawing tool according to either (7) or (8) above, it is preferable to provide a clearance between the ironing member and the peripheral wall surface.

[0015] (10) In the cap for a wire drawing tool described in (9) above, at least one rib extending toward the drawing opening may be provided on the peripheral wall surface.

[0016] (11) In the cap for a wire drawing tool described above in (10), the rib may be a semi-cylindrical rib.

[0017] (12) In the cap for a wire drawing tool according to either (10) or (11) above, the circumferential width of the rib may increase toward the drawing opening.

[0018] (13) The disclosed wire drawing tool is a wire drawing tool used for wire drawing using the transfer of powder adhering to a flexible wire, and includes a main body capable of accommodating the flexible wire together with the powder, and a cap attached to the main body. The cap includes a squeezing member for squeezing the flexible wire to which the powder has adhered, a storage space capable of accommodating the squeezing member, and a draw-out opening through which the flexible wire squeezed by the squeezing member can be drawn out. A portion of the storage space is formed by a peripheral wall surface that tapers toward the draw-out opening and is capable of holding the squeezing member.

[0019] (14) In the wire drawing tool of (13) above, the peripheral wall surface may be a conical surface.

[0020] (15) In the wire drawing tool according to either one of (13) or (14) above, it is preferable to provide a clearance between the ironing member and the peripheral wall surface.

[0021] (16) In the wire drawing tool of (15) above, at least one rib extending toward the drawing opening may be provided on the peripheral wall surface.

[0022] (17) In the wire drawing tool of (16) above, the rib may be a semi-cylindrical rib.

[0023] (18) In the wire drawing tool according to either one of (16) or (17) above, the circumferential width of the rib may increase toward the drawing opening.

[0024] According to the present disclosure, it is possible to provide a powder leakage suppression mechanism for a wire drawing tool, a cap for the wire drawing tool, and a wire drawing tool with improved powder leakage suppression performance.

[0025] 1 is a schematic diagram of a wire drawing tool according to an exemplary embodiment of the present disclosure, viewed from the reel handle side; FIG. 2 is a schematic diagram of the wire drawing tool of FIG. 1 viewed from the bracket side; FIG. 3 is a schematic diagram of the wire drawing tool of FIG. 1, with the reel handle side positioned on the right side of the drawing; FIG. 4 is a perspective view schematically illustrating an example of the wire drawing tool of FIG. 1 in use; FIG. 5 is a perspective view schematically illustrating a cap for the wire drawing tool of FIG. 1; FIG. 6 is a schematic diagram of the cap of FIG. 5, together with a locking member, viewed from the side attached to the main body of the wire drawing tool; FIG. 7 is a cross-sectional view schematically illustrating the cap of FIG. 6, taken along the X-X cross section; FIG. 8 is a cross-sectional view of an adapter for the cap of FIG. 7; FIG. 9 is a schematic diagram of the adapter of FIG. 10, viewed from the side attached to the main body of the wire drawing tool; FIG. 11 is a perspective view of an example of a holder to which the wire drawing tool of FIG. 1 can be attached, the holder being attached to a waist belt.

[0026] Hereinafter, a wire drawing tool 1 as an exemplary embodiment of the present disclosure will be described with reference to the drawings.

[0027] Figure 1 shows the wire drawing tool 1 before use. The wire drawing tool 1 is used for wire drawing using the transfer of powder P (see Figure 4) attached to a flexible wire 2. The wire drawing tool 1 includes a main body 3 that can accommodate the flexible wire 2 together with the powder P, and a cap 4 attached to the main body 3. The cap 4 includes a drawing opening A1 through which the flexible wire 2 can be drawn out.

[0028] The powder P may be, for example, powdered chalk whose main component is calcium. The flexible wire 2 may be, for example, a fiber or a thread. Here, fiber means a monofilament, and thread may be, for example, a twisted thread made by twisting together multiple fibers, or a knitted thread made by knitting multiple fibers. The fiber may be, for example, a natural fiber such as cotton or hemp, or an artificial fiber (chemical fiber) such as polyester or nylon. When the flexible wire 2 is a monofilament, the flexible wire 2 may be made of a porous material or a material that has the property of adhering the powder P.

[0029] In the present disclosure, a hook 21 is attached to the tip of the flexible wire 2. The hook 21 is used to fasten to a mating member during wire drawing. In the present disclosure, the hook 21 can be fixed to the main body 3 by hooking it into a notch 3c provided in the neck 3a of the main body 3. Figures 1 to 3 each show a state in which the hook 21 is fixed to the main body 3. When using the wire drawing tool 1, the hook 21 is detached from the main body 3 as shown in Figure 4.

[0030] In the present disclosure, a reel (not shown) for winding up the flexible wire 2 is disposed inside the main body 3 together with the powder P and the flexible wire 2. In the present disclosure, a reel cover 11 that can rotate synchronously with the reel is rotatably attached to the barrel 3b of the main body 3. In addition, as shown in FIG. 1 , in the present disclosure, a lock lever 12 for locking the rotation of the reel cover 11 is attached to the main body 3 on the same side as the reel cover 11. The lock lever 12 can lock and unlock the reel cover 11 by swinging about an axis 12a.

[0031] A handle 13 is attached to the reel cover 11 via a shaft 13a so as to be able to swing. As shown in Fig. 3, the handle 13 can be pushed down toward the reel cover 11 around the shaft 13a. This allows the handle 13 to be housed in a recess 11a provided in the reel cover 11, as shown in Fig. 1. On the other hand, as shown in Fig. 4, after the flexible wire 2 has been pulled out from the pull-out opening A, when the flexible wire 2 is to be wound up, the handle 13 can be lifted up from the reel cover 11, as shown in the same figure.

[0032] In addition, the main body 3 is provided with a bracket 15 for attachment to a holder 30, which will be described later. The bracket 15 is inserted into a guide rail portion 31 provided on the holder 30 and is detachably attached to the holder 30. In the present disclosure, the bracket 15 is provided on the neck 3a of the main body 3. The bracket 15 includes a base 15a fixed to the neck 3a and a flange 15b integrally provided on the base 15a. The flange 15b is provided at the tip of the base 15a and has a larger diameter than the base 15a.

[0033] 11 , the holder 30 can be configured to be attached to a waist belt 33 and held on the user's body, for example. The holder 30 has a pair of guide rails 31 arranged facing each other at a predetermined distance on its front side. An upper open space through which the bracket 15 is inserted is defined and formed between the pair of guide rails 31 and the main body of the holder 30. A locking stopper 32 that can slide diagonally downward is provided above the pair of guide rails 31.

[0034] Referring to FIG. 2 , in this embodiment, the bracket 15 includes a hexagonal base 15a and a hexagonal flange 15b. In this case, when the wire drawing tool 1 is attached to the tool holder 30 via the bracket 15, the wire drawing tool 1 can be positioned at 60-degree intervals while being tilted around the bracket 15. Referring to FIG. 2 , the bracket 15 is arranged so that two of the six vertices of the hexagon are aligned on the central axis O1 of the wire drawing tool 1. In other words, as shown in FIG. 2 , in a plan view from the bracket side, two of the six side surfaces F15 of the base 3a that face each other across the central axis O1 extend parallel to the central axis O1. In this case, the wire drawing tool 1 can be attached to the holder 30 with the drawing opening A aligned on the central axis O1. In addition, the wire drawing tool 1 can be attached to the holder 30 with the drawing outlet A aligned on the central axis O1, or the wire drawing tool 1 can be attached to the holder 30 at a different inclination every 60 degrees by changing the inclination every 60 degrees.

[0035] However, the orientation of the six side surfaces F15 can be set as appropriate. The base 15a can also be a polygonal prism other than a hexagonal prism. The flange 15a can also be a polygonal shape. The base 15a can also be a cylindrical or elliptical cylindrical shape. The flange 15a can also be a circular or elliptical shape.

[0036] 5 is a schematic diagram of the cap 4. In the present disclosure, the cap 4 includes a drawing opening A and an attachment portion 4a that is attached to the main body 3.

[0037] In the present disclosure, the cap 4 can be attached to the main body 3 by so-called bayonet fitting. In the present disclosure, the attachment portion 4a includes a cylindrical portion 4a1 and a key protrusion 4a2 protruding radially outward from the cylindrical portion 4a1. In the present disclosure, the key protrusion 4a2 can be inserted into the main body 3 by aligning it with a key notch (not shown) formed in an attachment opening of the main body 3. After inserting the key protrusion 4a2 into the main body 3 through the key notch of the main body 3, the cap 4 can be attached to the main body 3 by so-called bayonet fitting by rotating the cap 4 in one direction around the central axis O1 relative to the main body 3. Meanwhile, in the present disclosure, the cap 4 can be removed from the main body 3 by rotating it in the other direction around the central axis O1 relative to the main body 3.

[0038] In the present disclosure, the cap 4 is provided with a knob 4b. The knob 4b can be used when attaching or detaching the cap 4 to or from the main body 3. In the present disclosure, the cap 4 is provided with two knobs 4b.

[0039] 6 shows the cap 4 together with the locking member 6 from the side attached to the main body 3. In FIG. 7, the cap 4 is shown schematically in cross section taken along line XX of FIG.

[0040] In the present disclosure, the cap 4 is attachable to the main body 3 as described above, and includes a squeezing member 5 for squeezing the flexible wire 2 having the powder P adhered thereto, a storage space S capable of accommodating the squeezing member 5, and a draw-out opening A1 through which the flexible wire 2 squeezed by the squeezing member 5 can be drawn out, as shown in Fig. 7 .

[0041] In the present disclosure, the storage space S is disposed inside the cap 4. In the present disclosure, the storage space S has a central axis that is the same as the central axis O1 of the cap 4 (in this example, the same axis as the central axis O1) and extends in the extension direction of the central axis O1.

[0042] In the present disclosure, one axial side of the storage space S is connected to the withdrawal opening A1. In the present disclosure, a withdrawal passage R1 that is connected to the withdrawal opening A1 opens at the withdrawal-side end face F2 of the storage space S. In addition, in the present disclosure, a plurality of recesses 4d are opened at the withdrawal-side end face F2 of the storage space S, and are arranged at intervals in the circumferential direction around the central axis O1 so as to surround the withdrawal passage R1.

[0043] Meanwhile, in the present disclosure, the other axial side of the accommodation space S is open through a body attachment-side opening A2 formed in the body attachment-side end 4e of the cap 4. In the present disclosure, the body attachment-side end 4e is the body attachment-side end of the attachment portion 4a, more specifically, the body attachment-side end of the cylindrical portion 4a1 of the attachment portion 4a. In the present disclosure, the squeezing member 5 is accommodated in the accommodation space S through the body attachment-side opening A2 formed in the body attachment-side end 4e of the cap 4.

[0044] The ironing member 5 has a slit 5s for passing the flexible wire 2 to which the powder P is attached. In the present disclosure, as shown in FIG. 6 , the slit 5s is cut from the outer circumferential surface of the ironing member 5 so as to pass through the central axis of the ironing member 5 when viewed in the axial direction. Note that in the present disclosure, the central axis of the ironing member 5 is also assumed to be the same as the central axis O1 of the wire drawing tool 1. In the present disclosure, the flexible wire 2 that has passed through the slit 5s can be drawn out from the drawing outlet A1 via the drawing passage R1. However, the slit 5s may also be replaced with a through-hole.

[0045] In the present disclosure, the squeezing member 5 is a straight cylindrical member with a diameter of φ5. The squeezing member 5 can remove excess powder P from the surface of the flexible wire 2 by squeezing the flexible wire 2 to which powder P is attached. The squeezing member 5 can be made of, for example, a nonwoven material such as felt, or a resin material such as polyester or nylon. The resin material may be a foamed or non-foamed resin material. In other words, the squeezing member 5 may be made of any material that can remove excess powder P from the surface of the flexible wire 2.

[0046] As shown in Figure 6, the locking member 6 can partially close the main body attachment side opening A2 of the storage space S. In the present disclosure, the locking member 6 includes a pressing portion 6a and two elastic pieces 6b connected to the pressing portion 6a. Each of the two elastic pieces 6b is provided with an outward-facing claw 6c. Furthermore, in the present disclosure, the locking member 6 includes an unlocking projection 6d.

[0047] In the present disclosure, the two elastic pieces 6b can radially penetrate the cylindrical portion 4a1 of the attachment portion 4a by pushing the pressing portion 6a radially inward toward the central axis O1, as shown in Fig. 6. As a result, the two elastic pieces 6b prevent the squeezing member 5 from falling out of the accommodation space S, as shown in Fig. 6. Furthermore, in the present disclosure, the two claws 6c can each be hooked onto the outer circumferential surface of the cylindrical portion 4a1, as shown in Fig. 6. This prevents the locking member 6 from coming off the cylindrical portion 4a1.

[0048] On the other hand, the engagement between the two claws 6c and the cylindrical portion 4a1 can be released by pulling the unlocking projection 6d radially outward, thereby allowing the locking member 6 to be removed from the cylindrical portion 4a1, i.e., the cap 4.

[0049] The wire drawing tool 1 includes a powder leakage suppression mechanism (a structure for suppressing powder leakage) according to the present disclosure in addition to the squeezing member 5. In the present disclosure, the powder leakage suppression mechanism is provided in the cap 4. In the present disclosure, the powder leakage suppression mechanism is composed of the squeezing member 5 and a peripheral wall surface F1 that defines a portion of the storage space S. As shown in Fig. 7 , in the present disclosure, the portion of the storage space S is defined by the peripheral wall surface F1 that tapers toward a draw-out opening A1 through which the flexible wire 2 squeezed by the squeezing member 5 can be pulled out and that can hold the squeezing member 5.

[0050] According to the powder leakage suppression mechanism of the present disclosure, when the flexible wire 2 having powder P adhering thereto is pulled out, the squeezing member 5 squeezes the flexible wire 2 and moves toward the outlet A1, following the flexible wire 2 as it is pulled out. At this time, the peripheral wall surface F1 tapers toward the outlet A1, allowing the squeezing member 5 moving toward the outlet A1 to be held at the outlet. As a result, when the flexible wire 2 is pulled out, the squeezing member 5 expands radially outward from the central axis O1 as the amount of flexible wire 2 pulled out increases, and the reaction force from the peripheral wall surface F1 tightly closes the slit 5s. Therefore, when the flexible wire 2 is pulled out, scattering of powder P from the outlet A1 can be more effectively suppressed than when the peripheral wall surface F1 is parallel to the central axis O1.

[0051] Moreover, in the present disclosure, the storage space S is closed by the drawing-side end face F2. Therefore, the squeezing member 5, which moves toward the drawing opening A1 in response to the drawing of the flexible wire 2, presses against the drawing-side end face F2. In this case, the squeezing member 5 is compressed in the axial direction as the amount of the flexible wire 2 drawn increases, causing it to bulge further radially outward from the central axis O1. In this case, the slit 5s is closed more tightly by the reaction force from the peripheral wall face F1. Therefore, when the flexible wire 2 is drawn out, the flexible wire 2 is pressed even more strongly inside the squeezing member 5. This makes it possible to more effectively suppress the scattering of powder P from the drawing opening A1.

[0052] On the other hand, according to the powder leakage suppression mechanism of the present disclosure, when the flexible wire 2 is wound up, the squeezing member 5 moves back toward the main body attachment side opening A2 in response to the winding of the flexible wire 2, and reopens the slit 5s. As a result, the powder P remaining on the flexible wire 2 is drawn in through the drawing-out opening A1 as the flexible wire 2 is wound up. Therefore, even when the flexible wire 2 is wound up, scattering of the powder P from the drawing-out opening A1 can be more effectively suppressed than when the peripheral wall surface F1 is parallel to the central axis O1.

[0053] Therefore, the powder leakage suppression mechanism of the present disclosure suppresses the scattering of powder P from the drawing port A1, thereby improving the powder leakage suppression performance. In other words, the cap 4 equipped with the powder leakage suppression mechanism of the present disclosure improves the powder leakage suppression performance. In other words, the wire drawing tool 1 equipped with the cap 4 of the present disclosure improves the powder leakage suppression performance.

[0054] Additionally, in the present disclosure, as shown in FIG. 7, the peripheral wall surface F1 forms a clearance C between the squeezing member 5 and the peripheral wall surface F1.

[0055] When a clearance C is secured between the peripheral wall surface F1 and the ironing member 5, it is effective in suppressing scattering of the powder P, even when, for example, the peripheral wall surface F1 is parallel to the central axis O, as in the conventional case.

[0056] However, if the peripheral wall surface F1 is parallel to the central axis O, ensuring a large clearance C will result in the slits 5s of the squeezing member 5 opening wide, which will increase the amount of flying powder. On the other hand, if the clearance C is eliminated, the winding resistance when winding the flexible wire 2 will increase.

[0057] In contrast, with the powder leakage suppression mechanism of the present disclosure, the peripheral wall surface F1 expands toward the main body attachment opening A2. In this case, when the flexible wire 2 is wound, as the squeezing member 5 returns toward the main body attachment opening A2, the grip of the squeezing member 5 by the peripheral wall surface F1 gradually weakens. That is, the frictional resistance between the squeezing member 5 and the peripheral wall surface F1 is reduced as the squeezing member 5 returns toward the main body attachment opening A2. In addition, when the flexible wire 2 is wound, the slits 5s of the squeezing member 5 also return to their original state, so the pressure of the squeezing member 5 against the flexible wire 2 also weakens. Furthermore, the opening of the slits 5s does not increase beyond its initial opening. In addition, by ensuring the clearance C between the peripheral wall surface F1 and the squeezing member 5, scattering of the powder P is further suppressed. Therefore, according to the powder leakage suppression mechanism disclosed herein, by ensuring a clearance C between the peripheral wall surface F1 and the squeezing member 5, it is possible to more effectively suppress the scattering (scattering) of powder P from the withdrawal opening A1, and also to reduce the winding resistance when winding the flexible wire 2.

[0058] Additionally, the powder leakage suppression mechanism of the present disclosure is provided with at least one rib 7 on the peripheral wall surface F1, extending toward the drawing opening A1. The rib 7 comes into contact with the outer circumferential surface of the squeezing member 5, thereby easily ensuring the clearance C between the squeezing member 5 and the peripheral wall surface F1. Additionally, the rib 7 can stably position the squeezing member 5 disposed in the accommodation space S in the circumferential direction around the central axis O1.

[0059] It is preferable to provide a plurality of ribs 7 on the peripheral wall surface F1. In this case, a clearance C of approximately uniform radial height can be provided around the central axis O1. More preferably, three or more ribs 7 are provided on the peripheral wall surface F1. In this case, a clearance C of more uniform radial height can be provided around the central axis O1. In the present disclosure, three ribs 7 are provided on the peripheral wall surface F1.

[0060] In the present disclosure, the cap 4 includes a tip 41 having a withdrawal port A formed therein, and an adapter 42 for connecting to the main body 3. In the present disclosure, the tip 41 is attached to the adapter 42. In the present disclosure, the attachment portion 4a and the knob 4b are provided on the adapter 42. In the present disclosure, the storage space S is disposed in the adapter 42. However, the tip 41 and the adapter 42 of the cap 4 can be integrally formed.

[0061] 8 shows an adapter 42 for the cap 4. In the present disclosure, the accommodation space S is a conical space whose central axis is the central axis of the cap 4 (in this example, the same axis as the central axis O1). In the present disclosure, the peripheral wall surface F1 is a conical surface that extends annularly in the circumferential direction around the central axis O1.

[0062] 8 shows a diameter φ1 of the drawer-side end face F2 of the storage space S and a diameter φ2 of the main body attachment-side opening A2 of the storage space S. The symbol L denotes the axial length of the storage space S. In the present disclosure, the diameter φ1 is smaller than the diameter φ2. Also, in the present disclosure, the diameter φ1 can be the same as or larger than the diameter φ5 of the squeezing member 5.

[0063] The symbol α denotes the inclination angle of the peripheral wall surface F1. Here, the inclination angle α is the acute angle between the peripheral wall surface F1 and an axis parallel to the central axis O1 in a cross section including the central axis O1, as shown in FIG. 8 .

[0064] The inclination angle α of the peripheral wall surface F1 can be, for example, approximately 1.8°, or even 1.8°. When α=1.8°, for example, the diameter φ1 is 13 mm and the diameter φ2 is 14 mm.

[0065] In the present disclosure, the rib 7 extends from the drawer-side end face F2 of the storage space S toward the main body attachment-side opening A2. This allows the rib 7 to form a clearance C between the rib 7 and the ironing member 5, extending from the drawer-side end face F2 of the storage space S toward the main body attachment-side opening A2.

[0066] In the present disclosure, reference numeral 4d1 denotes a through hole that forms a part of the recess 4d provided in the cap 4. In the present disclosure, the recess 4d is formed by attaching the tip 41 to the adapter 42, so that the tip 41 closes the outlet-side opening of the through hole 4d1. The recess 4d can function as a powder-collecting recess to suppress powder flying.

[0067] FIG. 9 shows the adapter 42 diagrammatically from the side that is attached to the body of the wire drawing tool 1 .

[0068] As shown in Fig. 9, the rib 7 is a semi-cylindrical rib. Here, the semi-cylindrical rib includes not only a complete semi-cylindrical rib but also a rib formed by a curved surface with a curvature radius r7, as shown in Fig. 7. In this case, the movement of the squeezing member 5 becomes smoother, improving operability. In addition, the durability of the squeezing member 5 and the rib 7 is improved. In other words, the durability of the cap 4 is improved. In other words, the durability of the wire drawing tool 1 is also improved.

[0069] 9, the symbol h denotes the radial height of the rib 7. The radial height h of the rib 7 can be set to, for example, 3 mm. This allows a clearance C with a maximum radial height of 3 mm to be formed between the squeezing member 5 and the peripheral wall surface F1.

[0070] Figure 10 schematically illustrates the adapter 42 from the side attached to the main body 3. As shown in Figure 10, in the present disclosure, the circumferential width D of the rib 7 increases toward the drawing opening A1. In the present disclosure, the circumferential width D of the rib is such that the circumferential width D1 at the drawing-side end face F2 is wider than the circumferential width D2 at the main body attachment opening A2. This makes it easier for the squeezing member 5 to be held by the circumferential wall surface F1 toward the drawing-side end face F2, but harder for the squeezing member 5 to be held by the circumferential wall surface F1 toward the main body attachment opening A2. Therefore, in this case, dusting is further suppressed when drawing out the flexible wire 2, and the flexible wire 2 can be wound more smoothly when winding it up.

[0071] The above describes exemplary embodiments of the present disclosure, and various modifications can be made without departing from the scope of the claims. For example, in this disclosure, the peripheral wall surface F1 has been described as a linearly extending conical surface, but the peripheral wall surface F1 can be a dome-shaped peripheral wall surface that is convex radially outward around the central axis O1, or a dome-shaped peripheral wall surface that is convex radially inward around the central axis O1. Furthermore, in this disclosure, the ironing member 5 is described as a straight cylindrical member with a diameter of φ5, but it can also be a conical member.

[0072] 1: Wire drawing tool, 2: Flexible wire, 3: Main body, 3a: Neck, 3b: Body, 4: Cap 4, 4a: Mounting portion, 4a1: Cylindrical portion, 4a2: Key projection, 4b: Knob, 4d: Recess, 4d1: Through hole, 5: Squeezing member, 5s: Slit, 6: Locking member, 6a: Pressing portion, 6b: Elastic piece, 6c: Claw, 6d: Unlock projection, 7: Rib, 11: Reel cover, 12: Lock lever, 12a: Shaft, 13: Handle, 13a: Shaft, 15: Bracket, 15a: Base, 15b: Flange, 30: Holder, 31: Guide rail portion, 32: Locking stopper, 33: Waist belt, 41: Tip, 42: Adapter, A1: Pull-out opening A2: Main body attachment side opening, C: Clearance, D: Circumferential width of rib, D1: Circumferential width of draw-out side end face, D2: Circumferential width of main body attachment side opening, F1: Peripheral wall surface, F2: Drawing-out side end face, L: Axial length of storage space, O1: Central axis, P: Powder, R1: Drawing passage, r7: Radius of curvature, S: Storage space, α: Inclination angle, φ1: Diameter of draw-out side end face, φ2: Diameter of main body attachment side opening

Claims

1. A powder leakage suppression mechanism for a wire drawing tool used in wire drawing using the transfer of powder adhering to a flexible wire, the mechanism comprising a squeezing member for squeezing the flexible wire to which the powder has adhered, and a storage space capable of accommodating the squeezing member, a portion of the storage space tapering toward a withdrawal opening through which the flexible wire squeezed by the squeezing member can be withdrawn, and formed by a peripheral wall surface capable of holding the squeezing member.

2. A powder leakage suppression mechanism for a wire drawing tool as described in claim 1, wherein the peripheral wall surface is a conical surface.

3. A powder leakage prevention mechanism for a wire drawing tool as described in claim 1 or 2, wherein a clearance is provided between the squeezing member and the peripheral wall surface.

4. A wire drawing tool cap that can be attached to the main body of a wire drawing tool used for wire drawing using the transfer of powder adhering to a flexible wire, the wire drawing tool cap comprising: a squeezing member for squeezing the flexible wire to which the powder has adhered; a storage space capable of accommodating the squeezing member; and a draw-out opening through which the flexible wire that has been squeezed by the squeezing member can be drawn out, wherein a portion of the storage space is formed by a peripheral wall surface that tapers toward the draw-out opening and can hold the squeezing member.

5. A wire drawing tool used for drawing wires by transferring powder adhering to a flexible wire, comprising: a main body capable of accommodating the flexible wire together with the powder; and a cap attached to the main body; the cap comprising a squeezing member for squeezing the flexible wire to which the powder has adhered; a storage space capable of accommodating the squeezing member; and a draw-out opening through which the flexible wire squeezed by the squeezing member can be drawn out; a portion of the storage space is formed by a peripheral wall surface that tapers toward the draw-out opening and is capable of holding the squeezing member.

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