Tightening fastener

Abstract

To reliably prevent generation of metal powder even if sliding contact occurs between members of a fastener metal fitting, or between the fastener metal fitting and a receiving metal fitting, due to engagement or disengagement of the fastener metal fitting and the receiving metal fitting.SOLUTION: Among the members of a base plate 1, a lever plate 2, a hook frame 3, and a coil spring 4 of a fastener metal fitting F1, and a receiving metal fitting F2, where one member comes into sliding contact with another during engagement and disengagement between the fastener metal fitting F1 and the receiving metal fitting F2, at least one of the members is resin-coated.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a fastening fastener used for fastening one fastening target member, such as a case body or a box body, and another fastening target member, such as a lid or a door, in a closed state. [Background technology]

[0002] 2. Description of the Related Art Fastening fasteners have conventionally been used to fasten and maintain a closed state between a case body and a lid, a box body and a door, and the like.

[0003] As disclosed in Patent Document 1 and other publications, this type of fastening fastener comprises a fastener fitting fixed to the front side of one of the fastening target parts, such as a case body, and a receiving fitting fixed to the front side of the other fastening target part, such as a lid.

[0004] In the fastener fitting, the base end of the operating lever is connected by a first pivot to a bearing plate portion at one end of a base plate fixed to one of the fastening target members, the base end of the latch arm is connected by a second pivot to the middle portion of the operating lever, and a latch portion that engages with the hook portion of the receiving metal is provided at the tip of the latch arm. In addition, in this fastener fitting, each latch arm is divided into a tip side and a base side that are overlapped with each other, and a coil spring is wound in a compressed state between these tip side and base side arm portions. As a result, in the fastening and locking state in which the latch portion at the tip of each latch arm engages with the hook portion of the receiving metal, the second pivot is located closer to the base plate than the reference line passing through the latch portion and the first pivot, so that the elastic force of each coil spring of each latch arm acts as a force that rotates the operating lever in a clockwise direction, and the operating lever is pressed against the front faces of both fastening target members.

[0005] In this way, with the opening of one of the fastening objects, such as a case, closed by the other fastening object, such as a lid, the operating lever is pulled up and rotated in a direction away from the base, and the latch arm is rotated toward the receiving bracket to hook the latch portion at the tip of the latch arm onto the receiving bracket.From this state, the operating lever is then pushed down and rotated to the base, and each of the latch arms hooked to the receiving brackets is pulled with this operating lever.The tensile force of the latch arms and the action of each coil spring will allow the other fastening object, such as a lid, to be fastened and held to the one of the fastening objects, such as the case. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 4721371 Summary of the Invention [Problem to be solved by the invention]

[0007] However, because this type of fastening fastener has various components made of metal, when the lever plate (the operating lever) of the fastener fitting is rotated during use, one component slides against the other components of the fastener fitting, namely the base plate (the base plate), lever plate (the operating lever), hook frame (the latch arm and latch portion), coil spring (the coil spring), and receiving fitting, which can cause the mutual sliding surfaces to be worn down and generate metal powder. Recently, metal powder has become a problem in, for example, semiconductor and secondary battery manufacturing plants, because metal powder generated from various machines and equipment can adversely affect the machines, and improvements are being made to prevent metal powder from being generated from moving parts of various machines and equipment. Therefore, for this type of fastening fastener, depending on the application, it is necessary to prevent the generation of metal powder during use, and it is desirable to be able to meet this requirement.

[0008] The present invention has been made to solve such problems in the conventional art, and has as its object to reliably prevent the generation of metal powder in this type of fastening fastener, even when sliding contact occurs between the various components of the fastener fitting, or between the fastener fitting and the receiving fitting, due to engagement and disengagement between the fastener fitting and the receiving fitting. [Means for solving the problem]

[0009] In order to achieve the above object, the present invention provides A fastening fastener is provided with a fastener fitting attached to one of the fastening target members and a receiving fitting attached to the other of the fastening target members, and fastens and holds both of the fastening target members by engagement between the fastener fitting and the receiving fitting, The fastener fitting is A base plate fixed to one of the fastening target members and having a pair of bearings on one end side; a lever plate having a generally U-shaped cross section, comprising a central plate portion and two side plate portions, having a pair of bearing portions at one end of the two side plate portions and a pair of bearing portions at an intermediate portion of the two side plate portions, an operating lever extending from the other end of the central plate, and having a support shaft at one end inserted between the pair of bearings of the base plate and the pair of bearing portions at the one end, the lever plate being rotatably attached on the base plate; a hook frame whose base end is supported by a pair of bearings in the middle of the lever plate via a support shaft in the middle, and which is rotatably attached on the lever plate between the other end and a predetermined position on the extension of one end, and which has a generally U-shape or U-shape as a whole, and which has both side frame portions consisting of a tip frame portion and a tip-side and base-side divided frame portions; a coil spring that is compressed and wound between the split frame portions on the tip and base ends of the two frame portions of the hook frame and that urges the lever plate to rotate toward the base plate by engaging the fastener metal fitting with the receiving metal fitting; Each of the parts is made of a metal material, The receiving metal fitting is fixed to the other fastening target member, the hook plate of the fastener fitting has a hook portion that can be engaged and disengaged, and the hook portion is made of a metal material, At least one of the base plate, lever plate, hook frame, coil spring, and receiving metal member of the fastener metal member, which is brought into sliding contact with the other member when the fastener metal member and the receiving metal member are engaged or disengaged, is coated with resin. The gist of the present invention is as follows.

[0010] The fastener preferably also has the following configuration. (1) The pair of bearings of the base plate are formed on both sides of one end of the base plate so that the contact area with the lever plate is as small as possible. (2) Either the other end of the base plate or the other end of the lever plate has a protrusion, and the other has a recess into which the protrusion can be fitted. (3) A resin washer or a resin bushing is interposed between the pair of bearings and the support shaft. (4) A resin washer and / or a resin bushing is interposed between each pair of bearing portions and each support shaft. Effect of the Invention

[0011] The fastening fastener of the present invention, with its above-mentioned configuration, has the unique and exceptional effect of reliably preventing the generation of metal powder even when sliding contact occurs between the various components of the fastener fitting, or between the fastener fitting and the receiving fitting, due to engagement and disengagement between the fastener fitting and the receiving fitting. [Brief description of the drawings]

[0012] [Figure 1] 1A and 1B are diagrams showing the overall configuration of a fastening fastener, particularly a fastener fitting, according to one embodiment of the present invention ((a) is a perspective view showing the fastening state of the fastener fitting, and (b) is a perspective view showing the fastener fitting in an untightened state). [Diagram 2] FIG. 1 shows the configuration of each part of the fastener, particularly the fastener fittings ((a) is a front view, (b) is a side view, and (c) is a rear view). [Diagram 3] A diagram showing an example of use of the fastening fastener. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 shows the overall configuration of a fastening fastener F, and Fig. 2 shows the configurations of each part of the fastening fastener F.

[0014] As shown in FIG. 1, the fastening fastener F comprises a fastener fitting F1 that is attached to one of the fastening target members, such as a case body or a box body, and a receiving fitting F2 (see FIG. 3) that is attached to the other fastening target member, such as a lid or a door. The fastener fitting F1 and the receiving fitting F2 engage with each other to fasten and hold both fastening target members together.

[0015] As shown in FIG. 1, the fastener fitting F1 includes a base plate 1, a lever plate 2, a hook frame 3, and a coil spring 4.

[0016] As shown in FIG. 2, the base plate 1 is fixed to one of the fastening target members, and has a pair of bearings 10 on one end side. A pair of bearings 10 are formed on both sides of one end of the base plate 1 so that the contact area with the lever plate 2 is as small as possible. The other end of the base plate 1 has a protrusion 11 (see FIG. 1(b)).

[0017] In this case, as shown in Figs. 1 and 2, the base plate 1 is integrally formed from a metal material such as stainless steel, and is composed of a flat plate-shaped main body plate 1P, a pair of bearings 10 rising at a right angle from one end of both sides of the main body plate 1P, and a protruding portion 11 rising at a right angle from the other end of both sides of the main body plate 1P. The main body plate 1P is formed in a long and narrow rectangular flat plate in a plan view, and a plurality of bolt insertion holes B0 are provided for fixing the base plate 1. The pair of bearings 10 are formed in a roughly triangular shape with rounded corners, and a support shaft insertion hole is drilled near the apex of the triangle. The protruding portion 11 is composed of a pair of protruding portions 111 rising at a right angle from the other end of both sides of the main body plate 1P into a roughly trapezoidal shape with rounded corners, and a support pin 112 spanning between the apexes.

[0018] The entire base plate 1 is coated with resin.

[0019] Lever plate 2 is formed generally in a U-shaped cross section and comprises a central plate portion 21 and two side plate portions 22. Both side plate portions 22 have a pair of bearing portions 221 at one end and a pair of bearing portions 222 in the middle portion of both side plate portions 22, and an operating lever 23 extends from the other end of central plate portion 21. Lever plate 2 is rotatably attached on base plate 1, with support shaft 12 at one end inserted between the pair of bearings 10 of base plate 1 and the pair of bearing portions 221 at one end. The other end of the lever plate 2 has recesses 223 that can be fitted onto the respective protrusions 11 on the other end of the base plate 1 .

[0020] In this case, the lever plate 2 is integrally formed as a whole from a metal material such as stainless steel, and has a central plate portion 21 and two side plate portions 22.

[0021] The central plate portion 21 is formed in a long and narrow rectangle in a plan view, and an extension portion 211 is provided at one end, which is bent at a right angle from the one end into a circular arc shape in cross section and extends to a position beyond the position of the support shaft 12 passed through each bearing portion 221 at one end of the both side plate portions 22. In addition, slits 210 are cut out and formed on both sides from one end side of the central plate portion 21 (portions corresponding to each bearing portion 221 at one end of the both side plate portions 22) to the extension portion 211, and the portions on the one end side are separated from the both side plate portions 22. The operating lever 23 extends from the other end of the central plate portion 21 into a slightly narrow rectangular shape with a curved surface that is slightly curved outward toward the outer surface side of the central plate portion 21.

[0022] The two side plate portions 22 are each formed into an elongated rectangle extending perpendicularly from both sides of the central plate portion 21, with one end of each extending to both sides of one end of the central plate portion 21.

[0023] Each side plate portion 22 has a pair of bearing portions 221 at one end, and a shaft insertion hole is drilled in each of the bearing portions 221 so that the support shaft 12 at one end can be inserted therethrough. A resin washer 51 is disposed on the outside of the shaft insertion hole of each of the bearing portions 221. These bearing portions 221 are disposed on the outside of each of the bearings 10 at one end of the base plate 1, and a support shaft 12 made of a metal material such as stainless steel and having a flange portion 120 at one end is inserted into each of the shaft insertion holes, and the other end is crimped and fixed. As a result, the resin washers 51 are respectively interposed between the flange portion 120 at one end of the support shaft 12 and one of the bearing portions 221 at one end of the lever plate 2, and between the crimped portion 121 at the other end and the other of the bearing portions 221 at one end of the lever plate 2.

[0024] The intermediate portion of each side plate portion 22, in this case, a predetermined position closer to the other end to which the operating lever 23 extends than the center in the length direction of each side plate portion 22, is a pair of bearing portions 222 of the intermediate portion, and a shaft insertion hole is drilled in these intermediate portions so that the support shaft 22S of the intermediate portion can be inserted. A resin washer 52 is arranged on the outside of the shaft insertion hole of these bearing portions 222. A support shaft 22S made of a metal material such as stainless steel is inserted and fixed between (each of the support shaft insertion holes of) each of these intermediate bearing portions 222, and in this case, both ends of this support shaft 22S protrude outside each of the bearing portions 222 of the intermediate portion. A resin bush 53 is fitted into both ends of this support shaft 22S. In addition, both ends of this support shaft 22S are inserted through the bases of the two side frame portions 32 of the hook frame 3 described later, and are crimped via a resin washer 54 to both end faces of this support shaft 22S. As a result, resin bushings 53 are attached to the peripheral surfaces of both ends of the support shaft 22S, and resin washers 52, 54 are interposed between these resin bushings 53 and each bearing portion 222 in the middle portion, and between each resin bushing 53 and the crimped portions N1 at both ends of the support shaft 22S, respectively.

[0025] The recesses 223 on the other end of the lever plate 2 are formed in pairs on the other ends of the side plate portions 22 and are generally trapezoidal recesses with rounded corners so that the respective protruding portions 111 on the other end of the base plate 1 can be fitted therein.

[0026] The lever plate 2 may also be entirely resin-coated, but is not resin-coated here. Furthermore, in this lever plate 2, as already described, a resin washer 51 is interposed between a pair of bearing portions 221 at one end and the support shaft 12, and a resin washer 52 and a resin bushing 53 are interposed between a pair of bearing portions 222 at the middle portion and the support shaft 22S.

[0027] The hook frame 3 has its base end supported by a pair of bearing portions 222 in the middle of the lever plate 2 via a middle support shaft 22S, and is attached on the lever plate 2 so as to be rotatable between the other end side and a predetermined position on the extension of one end.The hook frame 3 has an approximately C-shape or U-shape as a whole, and has two side frame portions 32 consisting of a tip frame portion 31, and tip and base side split frame portions 32F, 32R.

[0028] In this case, the entire hook frame 3 is formed from a metal material such as stainless steel, and comprises a tip frame portion 31 and both side frame portions 32, and each of the both side frame portions 32 comprises a tip side split frame portion 32F and a base side split frame portion 32R.

[0029] The tip frame portion 31 is made of a shaft having threads on both ends.

[0030] Split frame parts 32F on the tip side of both side frame parts 32 are each formed in a long and narrow rectangular flat plate (arm shape) having a length approximately half the length required for both side frame parts 32, with a screw insertion hole drilled at one end which becomes the tip, and a spring receiving part T1 protruding on both sides in the perpendicular direction at the other end and forming an approximately T shape is provided. Resin washers 55 are arranged on the outside of the screw insertion holes of these split frame parts 32F on the tip side.

[0031] The split frame parts 32R on the base end side of the two-side frame parts 32 are each formed in a long and narrow rectangular flat plate (arm-like) shape having a length shorter than the length required for the two-side frame parts 32 by one end (the part having the screw insertion hole) of the split frame part 32F on the tip end side, and a spring receiving part T2 protruding on both sides in the perpendicular direction and having a substantially T-shape is provided at one end which is the tip end, and a screw insertion hole is drilled in the other end which is the base end. The resin washers 54 described above are arranged on the outside of the screw insertion holes of the split frame parts 32R on the base end side.

[0032] In this way, the hook frame 3 is assembled into a substantially U-shape by disposing the tip frame 31 between the screw insertion holes at the tips of the frame parts 32 on both sides, i.e., at the tips of the split frame parts 32F on each tip side, and passing the screws N2 through the screw insertion holes from the outside of the tips of the split frame parts 32F via the resin washers 55 and fastening the screws to the threaded parts at both ends of the tip frame part 31. The tip and base side split frame parts 32F, 32R are then stacked with the tip side split frame 32F disposed on the outside, and the split frame parts 32F, 32R are connected by interposing the coil spring 4 described later between them.

[0033] The entire hook frame 3 is resin-coated. In this case, the distal frame portion 31, the distal divided frame portion 32F of the both side frame portions 32, and the proximal divided frame portion 32R are each resin-coated. Further, a resin washer 55 is interposed between each screw insertion hole at the tip of the two side frame portions 32 and the head of the screw N2.

[0034] The coil spring 4 is made up of a pair of coil springs 4, which are compressed and wound between the split frame parts 32F, 32R on the tip and base ends of both side frame parts 32 of the hook frame 3. These coil springs 4 are adapted to urge the lever plate 2 in a rotational direction toward the base plate 1 when the fastener fitting F1 and the receiving fitting F2 are engaged with each other.

[0035] In this case, each coil spring 4 is made of a metal material such as stainless steel and is sized so that it can be wound between the tip and base side split frame portions 32F, 32R of both side frame portions 32 of the hook frame 3, i.e., between the spring receiving portion T1 of each tip side split frame portion 32F and the spring receiving portion T2 of each base side split frame portion 32R, and is wound between each spring receiving portion T1, T2 so as to be able to expand and contract in accordance with the expansion and contraction of each side frame portion 32. In this way, these coil springs 4 are designed to rotate the lever plate 2 towards the base plate 1 when the axis of the intermediate support shaft 22S is moved towards the base plate 1, and to rotate in the opposite direction when the intermediate support shaft 22S is moved in the opposite direction, with the reference line being an imaginary straight line connecting the tip (axis of the tip frame portion 31) of the hook frame 3 which is at a predetermined position on the extension of one end of the lever plate 2 (i.e., the engaged state between the fastener fitting F1 and the receiving fitting F2) and the axis of the support shaft 12 at one end.

[0036] These coil springs 4 are entirely coated with resin.

[0037] Referring to FIG. 3(1), the receiving fitting F2 is fixed to the other object to be fastened, and has a hook portion 62 with which the hook plate 3 of the fastener fitting F1 can be detachably engaged.

[0038] In this case, the receiving bracket F2 is formed entirely from a metal material such as stainless steel, and consists of a flat plate that is approximately T-shaped when viewed from above, and has an attachment portion 61 with bolt insertion holes at each end that protrudes to both sides from one end of each side, and a hook portion 62 that extends from the other end of this attachment portion 61 into an approximately U-shaped cross section.

[0039] This receiving metal fitting F2 may also be entirely resin-coated, but in this embodiment it is not resin-coated.

[0040] In this way, at least one of the components among the base plate 1, lever plate 2, hook frame 3, coil spring 4, and receiving metal fitting F2 of the fastener fitting F1, where one component comes into sliding contact with the other component as the fastener fitting F1 and receiving metal fitting F2 engage and disengage, is resin coated. A resin washer 51 is interposed between the bearing portion 221 at one end of the lever plate 2 and the support shaft 12 on both sides of the pair of bearings 10 of the base plate 1, and a resin washer 52 and a resin bushing 53 are interposed between the pair of bearing portions 222 of the lever plate 2 and the support shaft 22S.

[0041] This fastening fastener F has the above-mentioned configuration, and in use, the fastener fitting F1 is attached to one object to be fastened, such as the case body of a case, and the receiving fitting F2 is attached to the other object to be fastened, such as the lid of the case. In this manner, with the opening of the case body closed by the lid, the fastener fitting F1 and the receiving fitting F2 are engaged with each other, whereby the lid is fastened and held to the case body.

[0042] 3 shows an example of the use of this fastening fastener F. Here, the case body of the case is shown as one fastening target member, and the lid of the case is shown as the other fastening target member.

[0043] 3, the fastener fitting F1 has one end of a base plate 1 fixed to the case body C1 near the opening with multiple bolts B, with one end facing the opening of the case body C1, and the lever plate 2 is attached so that the lever plate 2 can rotate around one end as the center of rotation by operating the operating lever 23 of the lever plate 2. The receiving fitting F2 has the other end of an attachment portion 61 fixed to the lid C2 with multiple bolts B, with the other end facing the opening of the case body C1, and the receiving fitting F2 is attached to the case body C1 on an extension of one end of the fastener fitting F1.

[0044] As shown in Figures 3(1) and (2), with the opening of the case body C1 closed by the lid C2, first, the operating lever 23 is pulled up to rotate the lever plate 2 in a direction away from the base plate 1, and the hook frame 3 is rotated toward the receiving bracket F2 to hook the tip frame portion 31 of the hook frame 3 onto the hook portion 62 of the receiving bracket F2.

[0045] From this state, as shown in FIG. 3(3), when the operating lever 23 is pushed down and the lever plate 2 is rotated until it abuts against the base plate 1, the hook frame 3 hooked onto the hook portion 62 of the receiving bracket F2 is pulled, causing the space between the tip-side split frame portion 32F and the base-side split frame portion 32R to contract. As the coil spring 4 is compressed between the spring receiving portions T1, T2 of these split frame portions 32F, 32R, the lever plate 2 is forced to rotate toward the base plate 1. The tensile force of the hook frame 3 and the action of each coil spring 4 tightens and holds the lid C2 to the case body C1.

[0046] To release this tightening, the operating lever 23 is pulled up and rotated in a direction that pulls the lever plate 2 away from the base plate 1, and the hook frame 3 is removed from the hook portion 62 of the receiving metal fitting F2. This allows the lid C2 to be freely opened and closed from the case body C1.

[0047] In this way, when the lever plate 2 of the fastener fitting F1 is rotated each time the fastener fitting F1 and the receiving fitting F2 are engaged or disengaged, one member is brought into sliding contact with the other among the respective components of the base plate 1, lever plate 2, hook frame 3, coil spring 4, and receiving fitting F2.

[0048] In contrast, in this fastening fastener F, as described above, the base plate 1, lever plate 2, hook frame 3, coil spring 4 and receiving metal F2 of the fastener fitting F1 are made of a metal such as stainless steel, but at least one of the components between which one component comes into sliding contact with the other component when the fastener fitting F1 and the receiving metal F2 are engaged and disengaged is resin coated, so that even if there is sliding contact between the components of the fastener fitting F1, and between the fastener fitting F1 and the receiving metal F2, the generation of metal powder is reliably prevented.

[0049] In addition, the pair of bearings 10 of the base plate 1 are formed in a triangular shape on both sides of one end of the base plate 1 to minimize the contact area with the lever plate 2, so that the mutual sliding contact area between these bearings 10 and the bearing portion 221 is minimized. This reliably prevents the generation of metal powder.

[0050] In this case, the base plate 1 has a pair of convex portions 111 on both sides of the other end of the main plate 1P, and the lever plate 2 has a pair of concave portions 223 on the other end of both side plate portions 22 so that they can fit into these convex portions 111. Therefore, when the fastener fitting F1 and the receiving fitting F2 engage with each other, these convex portions 111 and concave portions 223 engage with each other, and even if the case vibrates or is subjected to an external shock, the base plate 1 and the lever plate 2 do not rattle, and sliding contact between their contact surfaces due to rattle is prevented. This reliably prevents the generation of metal powder.

[0051] Furthermore, since a resin washer 51 is interposed between the pair of bearings 221 at one end of the lever plate 2 and the support shaft 12 outside the pair of bearings 10 of the base plate 1, the pair of bearings 221 and the support shaft 12 do not come into sliding contact with each other. This reliably prevents the generation of metal powder. In addition, since a resin washer 52 and a resin bush 53 are interposed between the pair of bearings 222 at the middle part of the lever plate 2 and the support shaft 22S, the pair of bearings 222 and the support shaft 22S do not come into sliding contact with each other. This reliably prevents the generation of metal powder.

[0052] As described above, according to this fastening fastener F, the base plate 1, lever plate 2, hook frame 3, coil spring 4 and receiving metal F2 of the fastener fitting F1 are made of metal such as stainless steel, but at least one of the components between which one component slides against the other component when the fastener fitting F1 and the receiving metal F2 engage and disengage with each other is resin coated. Therefore, even if the components of the fastener fitting F1 slide against each other when the fastener fitting F1 and the receiving metal F2 engage and disengage with each other, or even if the fastener fitting F1 and the receiving metal F2 slide against each other, it is possible to reliably prevent metal powder from being generated between the sliding surfaces of the two.

[0053] Furthermore, the pair of bearings 10 of base plate 1 are formed on both sides of one end of base plate 1 in a shape that minimizes the contact area with lever plate 2, in this case a triangular shape, so that the mutual sliding contact area between the pair of bearings 10 and the pair of bearing portions 221 at one end of lever plate 2 can be minimized as much as possible, and together with the resin coating, the generation of metal powder can be reliably prevented.

[0054] In this case, a convex portion 11 is provided on the other end of the base plate 1, and a concave portion 223 is provided on the other end of the lever plate 2 into which the convex portion 11 can be fitted. When the fastener fitting F1 and the receiving fitting F2 engage, the base plate 1 and the lever plate 2 are fixed by the engagement of these convex portion 11 and concave portion 223. Therefore, even if vibrations are generated by a machine inside a case, for example, in which this fastening fastener F is attached, or if an impact is applied from outside the case, the base plate 1 and the lever plate 2 will not rattle, and it is possible to prevent the contact surfaces of the base plate 1 and the lever plate 2 from sliding against each other due to this rattle, thereby reliably preventing the generation of metal powder.

[0055] Furthermore, since resin washers 51 are interposed between the pair of bearings 221 at one end of the lever plate 2 and the support shaft 12 on both sides of the pair of bearings 10 of the base plate 1, the pair of bearings 221 and the support shaft 12 do not come into sliding contact with each other, thereby reliably preventing the generation of metal powder. In addition, since resin washers 52 and resin bushings 53 are interposed between the pair of bearings 222 at the middle part of the lever plate 2 and the support shaft 22S, the pair of bearings 222 and the support shaft 22S do not come into sliding contact with each other, thereby reliably preventing the generation of metal powder.

[0056] In this embodiment, resin washers 51 are interposed between a pair of bearing portions 221 at one end of the lever plate 2 and the support shaft 12 on both sides of the pair of bearings 10 of the base plate 1, but the resin washers may be replaced with resin bushings. Furthermore, although the resin washer 52 and the resin bushing 53 are interposed between the pair of bearing portions 222 in the middle portion of the lever plate 2 and the support shaft 22S, only one of the resin washer and the resin bushing may be used. Even in this case, the same effects as those of the above embodiment can be achieved.

[0057] Furthermore, in this embodiment, the main plate 1P of the base plate 1 has a convex portion 11 on the other end side, and the two side plate portions 22 of the lever plate 2 have a pair of concave portions 223 on the other end side into which the convex portion 11 can be fitted; however, these convex portions and concave portions can be changed as desired, and for example, the main plate of the base plate may have a cylindrical convex portion or concave portion on the other end side of the central plate portion of the lever plate, and one convex portion may be engaged with the other concave portion. Even in this case, the same effects as those of the above embodiment can be achieved.

[0058] In this embodiment, the resin washers 51 are interposed between the pair of bearings 221 at one end of the lever plate 2 and the spindle 12 on both sides of the pair of bearings 10 of the base plate 1, and the resin washers 52, the resin bushes 53, and the resin washers 54 are interposed between the pair of bearings 222 at the middle part of the lever plate 2 and the spindle 22S, but since each part of the fastener fitting F1 is resin coated as described above, these resin washers and resin bushes may be selectively attached as necessary. For example, only some of the resin washers 52, the resin bushes 53, and the resin washers 54 may be attached between the pair of bearings 222 at the middle part of the lever plate 2 and the spindle 22S, or all of them may be omitted. Even in this case, the same effects as those of the above embodiment can be achieved.

[0059] Furthermore, in this embodiment, at least one of the base plate 1, lever plate 2, hook frame 3, coil spring 4 and receiving fitting F2 of the fastener fitting F1, which come into sliding contact with one another as the fastener fitting F1 and receiving fitting F2 engage and disengage, is resin coated; however, it goes without saying that all of these components may be resin coated. Even in this case, it is possible to obtain the same or even greater effects as those of the above-described embodiment. [Explanation of symbols]

[0060] F Fastening fastener F1 zipper fittings 1 Base plate 1P Main Plate B0 Bolt insertion hole B Bolt 10. Bearings 11 Convex 111 Convex part 112 Support pin 12 Spindle 120 Flange 121 Crimping part 2 Lever Plate 21 Center plate 210 Slit 211 Extension 22 Side plate part 221 Bearing section 222 Bearing section 22S spindle 223 Recess 23 Operating lever 3 Hook Frame 31 Tip frame part 32 Side frame part 32F Split frame part at the tip T1 Spring support 32R Split frame part on the base end T2 Spring support 4 Coil spring 51 Resin washer (resin washer) 52 Resin washer (resin washer) 53 Resin bush (resin bush) 54 Resin washer (resin washer) 55 Resin washer (resin washer) N1 Crimping part N2 Screw F2 Bracket 61 Mounting part B Bolt 62 Hook part C1 case body C2 lid

Claims

1. A fastening fastener is provided with a fastener fitting attached to one of the fastening target members and a receiving fitting attached to the other of the fastening target members, and fastens and holds both of the fastening target members by engagement between the fastener fitting and the receiving fitting, The fastener fitting is A base plate fixed to one of the fastening target members and having a pair of bearings on one end side; a lever plate having a generally U-shaped cross section, comprising a central plate portion and two side plate portions, having a pair of bearing portions at one end of the two side plate portions and a pair of bearing portions at an intermediate portion of the two side plate portions, an operating lever extending from the other end of the central plate, and having a support shaft at one end inserted between the pair of bearings of the base plate and the pair of bearing portions at the one end, the lever plate being rotatably attached on the base plate; a hook frame whose base end is supported by a pair of bearings in the middle of the lever plate via a support shaft in the middle, and which is attached on the lever plate so as to be rotatable between the other end and a predetermined position on the extension of one end, and which has a generally U-shape as a whole and has both side frame portions consisting of a tip frame portion and split frame portions on the tip side and the base side; a coil spring that is compressed and wound between the split frame portions on the tip and base ends of the two frame portions of the hook frame and that urges the lever plate to rotate toward the base plate by engaging the fastener metal fitting with the receiving metal fitting; Each of the parts is made of a metal material, The receiving metal fitting is fixed to the other fastening target member, the hook plate of the fastener fitting has a hook portion that can be engaged and disengaged, and the hook portion is made of a metal material, At least one of the base plate, lever plate, hook frame, coil spring, and receiving metal member of the fastener metal member, which is brought into sliding contact with the other member when the fastener metal member and the receiving metal member are engaged or disengaged, is coated with resin. A fastening fastener characterized by the above.

2. 2. The fastener according to claim 1, wherein the pair of bearings of the base plate are formed on both sides of one end of the base plate so that the contact area with the lever plate is as small as possible.

3. 2. The fastener according to claim 1, further comprising a protrusion on one of the other end of the base plate or the other end of the lever plate, and a recess on the other end into which the protrusion can be fitted.

4. 2. The fastener according to claim 1, further comprising a resin washer or a resin bushing interposed between the pair of bearings and the support shaft.

5. 2. The fastener according to claim 1, wherein a resin washer and / or a resin bush is interposed between each pair of bearing portions and each support shaft.

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