JP6692221B2 - Fastening fastener - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a fastening fastener used for firmly fastening and fixing a door or a lid to a box body (housing).

  Generally, in a box in which electrical equipment and communication equipment are stored and installed, a door is rotatably attached to one of the left and right sides of the opening of the box body via a hinge, and a fastening fastener is attached to the other side of the box. Then, the door is firmly tightened and fixed on the opening of the box body by the tightening fastener. Also, in this type of box, in order to shield the inside of the box body from the water-tightness with a door, packing is attached to the opening peripheral edge of the box body, and the tightening fastener tightens the packing between the door and the box body. It is designed to be compressed.

A fastening fastener used for this type of box has been proposed by the applicant of the present application according to Patent Document 1 previously.
The tightening fastener of Reference 1 has two restriction grooves at the rear end that are parallel to the front surface of the box body and are opposed to each other in terms of diameter, and a fixed outer cylinder having a recessed part that is pulled forward at one end of the restriction groove. And a rotary inner cylinder to be inserted into the fixed outer cylinder and a fixed outer cylinder, each of which has two V-shaped guide grooves facing each other on the diametrically opposite side in the circumferential side wall. An operation handle that is projected and fixed to the front end of the rotating inner cylinder, a lock shaft that is inserted into the rotating inner cylinder, and a stopper that is integrally formed on the rear portion of the lock shaft that projects rearward of the fixed outer cylinder, An interlocking pin that is provided diametrically at the front end of the lock shaft and has both ends inserted into the guide grooves, a stop pin that is provided diametrically at the rear of the lock shaft and has both ends inserted into the regulation grooves, and a fixed outer cylinder. The compression coil that is inserted between the Is constituted by a spring, the fixed outer cylinder is attached is inserted fixed to the door.
In this tightening fastener, when the operation handle is turned in the locking direction, in this case, the counterclockwise direction, the stopper of the lock shaft is engaged with the receiver of the box body, and the door is tightened and locked by the box body.
Then, when the operating handle is turned in the unlocking direction, in this case, the clockwise direction, the interlocking pin apparently moves from the rear end of the groove portion to the intersection with the other groove portion, and in this process the interlocking pin moves forward. Since the lock shaft is pushed by the inner wall surface of the groove portion inclined to, the lock shaft is slightly slid rearward, and the stop pin is slightly lifted from the deepest portion of the recess of the restriction groove. When the inner cylinder further continues to rotate, the interlocking pin moves from the intersection to the other groove, and when the interlocking pin reaches the rear end of the groove, the stop pin escapes from the recess of the restriction groove. Then, the lock shaft becomes rotatable with respect to the fixed outer cylinder, and when the stop pin comes out of the recess, the stopper plate also linearly moves backward and is disengaged from the receiving member. When the rotating inner cylinder is further rotated by a certain angle in the unlocking direction by this operation handle, the lock shaft rotates integrally with the rotating inner cylinder, and when the lock shaft rotates, the stop pin moves clockwise in the restriction groove. Then, the stop pin reaches the end of the restriction groove opposite to the recess, and is rotated to a position where the stopper plate does not collide with the receiver. As a result, the locking of the door to the box body by the fastening fastener is released, and the door is opened by pulling the operation handle toward you.
In the case of this fastening fastener, the fastening stroke of the stopper plate is 3.5 mm.

JP, 2000-320198, A

However, the conventional fastening fasteners described above have the following problems.
(1) If packing is attached to the opening peripheral edge of the box body, the door is pushed back by the reaction force of the packing even if the door is being pressed from the front. As a result, when the stopper plate is brought into close engagement with the receiving plate of the box body, the stopper plate comes into contact with the opening edge of the box body and is difficult to lock. On the other hand, in the above conventional fastening fastener, when the operation handle is turned in the locking direction, the stopper plate is rotated at a position a little rearward with respect to the receiver to face the receiver, and the operation is continued. When the handle is turned, the stopper plate gradually moves forward together with the lock shaft together with the lock shaft and engages tightly with each other, so that the stopper plate is less likely to hit the opening edge portion of the box body as compared with a general fastening fastener. However, if the packing becomes thick, the door is largely pushed back by the reaction force of the packing, as described above, so that the stopper hits the opening edge of the box body and is difficult to lock.
(2) In the above conventional fastening fastener, since the operation handle is in the form of a knob extending substantially at right angles to the shaft (rotating inner cylinder), the stopper plate and the receiving plate are engaged or disengaged. Whether or not it is not visible from outside the operating handle. For this reason, I intended to turn the operation handle firmly and hook the stopper plate on the stopper plate, but in reality, the stopper plate may not be engaged at the proper position, for example, the stopper plate is only partially hooked. is there. If the clasp only hangs on a part of the catch, the clasp may come off the catch and the door may open when the box is subjected to external vibration.

  The present invention solves such a conventional problem, and in this type of fastening fastener, the fastening stroke of the clasp is significantly increased so that the clasp is attached to the box body even if the packing is thick. Make sure that the stopper does not hit and that it can be locked securely, and that the stopper is engaged with the receiver at the proper position only by visual inspection from the outside of the operation handle, that is, the door. Another object is to make it possible to confirm whether or not the lid is securely locked (fixed) to the box body.

In order to achieve the above object, the present invention provides
A fastening fastener that is attached to a door or lid that opens and closes the front opening of the box body, and that is used to tighten and fix the door or lid to the box body.
The inner peripheral surface is formed into a substantially cylindrical shape with a small-diameter cylindrical shape at the rear end, a medium-diameter cylindrical shape at the middle part, and a large-diameter cylindrical shape at the front end, and is parallel to the front surface of the box body at the rear end. A main body case having two restriction grooves that are diametrically opposed to each other, having a recess that extends toward the front at one end of each restriction groove, and having a notch in a part of the peripheral surface of the front end;
A position that has a substantially cylindrical shape rotatably within the cylindrical shape of the middle part of the main body case, has a locking protrusion or an engaging recess at the front end of the peripheral surface, and faces the peripheral surface at the front end side of the peripheral surface. It has a pair of guide grooves consisting of a pair of slits extending from two locations in opposite spiral directions in a spiral shape to two locations facing each other on the rear end side of the peripheral surface in a spiral shape, and has a cylindrical shape in the middle part of the main body case. The collar to be inserted inside,
A cylindrical shape is rotatably provided in the cylindrical shape of the intermediate portion of the main body case, and an engaging recess or engaging projection that is engageable with the engaging protrusion or engaging recess of the collar is provided at the rear end of the peripheral surface. A rotary drive portion having a groove on the rear end surface thereof, formed in a substantially cylindrical shape that can be continuously fitted to the front end portion of the rotary drive portion into a large-diameter cylindrical shape of the front end portion of the main body case, An operation lever mounting part having a notch part communicating with the notch part of the main body case in a part of the surface, and a shaft of the rotation drive part from the operation lever mounting part via a shaft in the operation lever mounting part. From an operation lever rotatably attached between an operation position protruding along a direction and a storage position in which the operation lever attachment portion and the cutout portion of the main body case fall down inside the operation lever attachment portion. And the operating part
A lock shaft that is inserted into the collar and projects from the rear end of the main body case,
An operating pin that is provided so as to pass through in the diametrical direction on the front end side of the lock shaft, and has both ends inserted into the guide grooves of the collar,
A restriction pin that is provided to penetrate through the middle portion of the lock shaft in a diametrical direction and has both ends arranged in a restriction groove of the main body case,
A stopper plate provided at the rear portion of the lock shaft, protruding laterally of the lock shaft, and disengaged from a receiving portion provided in the box body,
A compression coil spring that is inserted into a groove of the rotation drive unit and biases the lock shaft toward the rear;
Equipped with
The main body case is attached to the door or the lid by being fixedly attached,
By rotating the operating portion in one direction by the operating lever, the collar is rotated to guide engagement between the spiral guide groove of the collar and the operating pin of the lock shaft, and the main body case. The lock shaft is pushed out of the main body case by the engagement guide between the recessed portion of the lock shaft and the restriction pin of the lock shaft, and the lock shaft is pushed backward from the lock position to lock the lock plate to the receiving portion. Linearly moving to the facing position, and subsequently following the engagement guide between the spiral guide groove of the collar and the operating pin of the lock shaft, and the restriction pin of the lock shaft and the restriction groove of the main body case. The lock shaft is rotated by the engagement guide, and is rotated from the rear facing position to the lock releasing position not facing the catch with respect to the catch.
On the contrary, by rotating the operation portion in the other direction by the operation lever, the collar is rotated, and the engagement guide between the spiral guide groove of the collar and the operation pin of the lock shaft and The lock shaft is rotated by the engagement guide between the restriction pin of the lock shaft and the restriction groove of the main body case, and the stopper plate is moved from the unlocked position to a position facing the receiving portion at a rear position. The lock is rotated by the engagement guide between the spiral guide groove of the collar and the operation pin of the lock shaft and the engagement guide between the recess of the main body case and the restriction pin of the lock shaft. The shaft is drawn into the main body case, and the stopper plate is tightened and locked to the receiving portion from a position facing the receiving portion at a rear position. By moving the operation lever linearly to the locking position, and at the same time, storing the operation lever in the accommodation position in the operation lever attachment portion by retracting the operation lever attachment portion and each of the notches of the main body case to store the operation lever. While stopping the rotation of the operation portion, the operation lever at the storage position displays a normal engagement state between the stopper plate and the receiving plate,
That is the summary.
In this tightening fastener, the pair of guide grooves are formed with long holes in the circumferential direction in the circumferential surface of the collar at two positions facing each other in the vicinity of the front end of the circumferential surface. It is preferable to form a substantially serpentine shape by obliquely cutting in opposite directions within the range of the peripheral angle of 110 ° to 140 ° to two positions facing each other and adjacent to the rear end of the peripheral surface.
Further, in this fastening fastener, the operation lever has a stopper portion that presents a flat surface at each portion facing the bottom portion of the operation lever attachment portion at the operation position and the storage position in the operation lever attachment portion, and the operation lever attachment portion has a bottom portion. Has a leaf spring having a substantially trapezoidal cross-section capable of engaging with each stopper portion of the operation lever, and holds the operation lever in the operation position and the storage position by the engagement of each stopper portion with the leaf spring. It is preferable to do so.
Further, in this tightening fastener, the operation lever has a hole through which a ring-shaped closure can be inserted, and the closure attachment part having a hole through which the closure can be inserted is attached to the door or the lid or the box body or its vicinity. It is preferable that the closure is inserted and locked between the hole of the operation lever and the hole of the closure attachment portion so that the door or the lid is closed.

According to the fastening fastener of the present invention, with the above-described configuration, the following special effects unique to the present invention are exhibited.
(1) By rotating the operating portion in one direction by the operating lever, the collar is rotated to engage with the pair of spiral guide grooves of the collar and the operating pin of the lock shaft, and each recess of the main body case. The lock shaft is pushed out of the main body case by the engagement guide between the lock shaft and the lock pin, and is linearly moved from the locking position where the lock plate is locked to the receiving part and locked to the rear facing position. Following the engagement guide between the spiral guide groove of the collar and the operating pin of the lock shaft and the engagement guide of the lock shaft regulating pin and the body case regulating groove, the lock shaft is rotated and the stopper plate is received against the receiving portion. Then, the collar is rotated by rotating the operating portion in the other direction with the operating lever from the rear facing position to the lock releasing position that does not face the opposite side. The lock shaft is rotated by the engagement guide between the spiral guide groove of the rail and the operating pin of the lock shaft and the engagement guide between the lock pin of the lock shaft and the lock groove of the main body case, and the stopper plate is released from the unlocked position. It rotates to the opposite position behind the receiving part, and then the engagement guide between the pair of spiral guide grooves of the collar and the operating pin of the lock shaft and the engagement guide between the recess of the main body case and the lock pin of the lock shaft. With this, the lock shaft is pulled into the main body case and moved linearly from the position opposite to the catch to the receiving part to the locking position where the lock is tightened and locked to the receiving part. The spiral guide groove greatly increases the tightening stroke of the stopper plate, even if the packing placed between the door or lid and the box body is thick. So as not hit the box body, it is possible to perform locking reliably.
(2) When the operating lever is rotated in the other direction by operating the operating lever, the operating lever is moved to the storage position inside the operating lever mounting portion when the stopper plate is tightened and locked to the stopper. Since the operating part is stopped from rotating and the normal engagement state of the stopper plate and the receiving plate is displayed by storing the operation part through the notches in the mounting part and the main body case, the tightening fastener can be used to secure the operation. It can be locked and held, and whether or not the stopper plate is engaged in the regular position with respect to the receiver, that is, the door or the lid, can only be seen from the outside of the operating handle. It is possible to confirm whether or not is securely locked (fixed) to the box body.

The figure (perspective view) which shows the structure of the fastening fastener in one embodiment of this invention. The figure which shows the structure of each part of the fastening fastener (exploded perspective view) The figure which shows the internal structure of the same fastening fastener (plan sectional drawing) The figure which shows the structure of the back side of the fastening fastener (rear view). The figure which shows the structure of the front side of the same fastening fastener (front view). The figure which shows especially the structure of a color of the fastening fastener ((a) is a top view (b) is a side view) The figure which shows the internal structure of the operation part especially of the same fastener ((a) is a plane sectional view when an operation lever is in an operation position, (b) is a plane sectional view when an operation lever is in a storage position) The figure which shows the commonly used ring-shaped closure used for the same fastening fastener (perspective view). The figure which shows the state which attached the same fastener to the door (partial cross-sectional plan view) The figure which shows the operating method of the fastening fastener and the movement of each part of the fastening fastener. The figure which shows the state in which the door is tightened and locked by the same fastener with the box body

Next, an embodiment for carrying out the present invention will be described with reference to the drawings.
The tightening fastener is shown in FIGS. 1 and 2.
As shown in FIGS. 1 and 2, the fastening fastener F is attached to a door or a lid (hereinafter, simply referred to as a door) that opens and closes the front opening of the box body, and fastens the door to the box body. An operation unit 3 including a main body case 1, a collar 2, a rotation drive unit 3A, an operation lever mounting unit 3B, and an operation lever 3C, a lock shaft 4, an operation pin 5, a restriction pin 6, and a stopper plate 7. , And a compression coil spring 8.

As shown in FIG. 3, the main body case 1 has a substantially cylindrical shape whose inner peripheral surface has a small diameter cylindrical shape at a rear end portion 13, a middle diameter cylindrical shape at an intermediate portion 12, and a large diameter cylindrical shape at a front end portion 11. The rear end portion 13 has two restriction grooves 131 parallel to the front surface of the box main body in a diametrically opposed manner, and at one end portion of each restriction groove 131 a recess 132 extending forward is formed. A cutout portion 110 is provided on a part of the peripheral surface (peripheral wall) of the portion 11.
In this case, the main body case 1 is formed into a substantially bolt shape by zinc die casting, and is composed of a substantially cylindrical shaft 102 and a substantially frustoconical head 101, and the inner peripheral surface of the shaft 102 has a rear end portion 13. Is a small diameter cylindrical shape, the intermediate portion 12 is a medium diameter cylindrical shape, and the inner peripheral surface of the head 101 is a large diameter cylindrical shape. A screw 121 is cut on the outer peripheral surface of the intermediate portion 12 of the shaft 101 (see FIG. 2). The outer peripheral surface of the intermediate portion 12 of the shaft 101 is formed into a substantially oval cross section, and two flat surfaces 122 are formed on the outer peripheral surface of the intermediate portion 12, and the two flat surfaces 122 are threaded. Absent. As shown in FIG. 4, the two restricting grooves 131 are formed in a range of a predetermined angle (in this case, 120 °) from the center of the rear end surface so as to face the rear end portion 13 of the shaft 102, and each restricting groove 131 is formed. A recess 132 is formed in one end of the groove 131 in a substantially U-shape in the axial direction (see FIG. 3). As shown in FIG. 5, the cutout portion 110 of the head 101 (front end portion 11) is cut out in a range in which the peripheral surface (peripheral wall) of the head 101 is smaller than the semicircle in plan view, and the peripheral surface (peripheral wall) of the head 101 is surrounded. ) Is formed in a substantially C shape in a plan view, and both end surfaces of this peripheral surface (peripheral wall) are formed substantially parallel to a rotation shaft (shaft 34) of the operation lever 3C described later. A groove 111 for the C-shaped retaining ring 91 is also provided on the bottom side of the inner peripheral surface of the head 101 (see FIG. 3).
As shown in FIG. 2, the main body case 1 is attached to the door with a hexagon nut 94 via a waterproof packing 92 and a toothed washer 93.

As shown in FIG. 2, the collar 2 rotatably has a substantially cylindrical shape within the cylindrical shape of the intermediate portion 12 of the main body case 1, and has a locking protrusion 21 or an engaging recess at the front end of the peripheral surface. On the surface, a pair of guide grooves consisting of a pair of slits extending from two positions facing each other on the front end side of the peripheral surface to two positions facing each other on the rear end side of the peripheral surface spirally in mutually opposite circumferential directions. 22 and is inserted into the cylindrical shape of the intermediate portion 12 of the main body case 1.
In this case, as shown in FIG. 3, the collar 2 is made of stainless steel and has an outer diameter slightly smaller than the inner diameter of the intermediate portion 12 so that the intermediate portion 12 of the body case 1 can be fitted to the intermediate portion 12. 12 is formed in a substantially cylindrical shape having a length slightly shorter than the length of 12, and locking protrusions 21 are formed in the front end portions in positions facing each other in the axial direction (see FIG. 2), and a pair of guide grooves 22. As shown in FIG. 6, the collar 2 has a circumferential surface that is long in the circumferential direction at two positions where the circumferential surface of the collar 2 is close to the front end of the collar and faces each other, here immediately after each locking projection 21. The holes 220 are formed so as to be diagonally opposite to each other in the circumferential direction from each of the elongated holes 220, and to face each other at a circumferential angle of 110 ° to 140 °, in this case at 126 °, close to the rear end of the circumferential surface. It is cut out to two positions and formed into a substantially serpentine shape.
As shown in FIG. 3, the collar 2 is fitted into the cylindrical shape of the intermediate portion 12 of the main body case 1. In this case, the rear end of the collar 2 is abutted against the step portion between the intermediate portion 12 and the rear end portion 13 of the main body case 1 in the intermediate portion 12 of the main body case 1, and the intermediate portion of the main body case 1 is An insertion space for the rotary drive unit 3A of the operation unit 3 is left on the side of the front end 11 of the operation unit 12.

As shown in FIG. 2, the operation part 3 includes a rotation drive part 3A, an operation lever attachment part 3B, and an operation lever 3C. The rotation driving portion 3A has a cylindrical shape rotatably within the cylindrical shape of the intermediate portion 12 of the main body case 1, and is engageable with the locking protrusion 21 or the engagement concave portion of the collar 2 at the rear end of the peripheral surface. It has a recess 30 or a locking protrusion, and a groove 31 on the rear end face. The operation lever mounting portion 3B is formed in a substantially cylindrical shape so as to be fitted into the large-diameter cylindrical shape of the front end portion 11 of the main body case 1 continuously with the front end portion of the rotary drive portion 3A, and has a peripheral surface (peripheral wall). A cutout portion 33 communicating with the cutout portion 110 of the main body case 1 is partially provided. The operation lever 3C is operated in the operation lever attachment portion 3B via the shaft 34 so as to project forward from the operation lever attachment portion 3B along the axial direction of the rotation drive portion 3A and in the operation lever attachment portion 3B. It is rotatably attached between the lever attachment portion 3B and the storage position in which the body casing 1 is laid down through the notches 33 and 110.
In this case, as shown in FIG. 3, in the operation unit 3, the rotation drive unit 3A and the operation lever attachment unit 3B are integrally formed by zinc die casting, and the rotation drive unit 3A is provided in the intermediate portion 12 of the main body case 1 with the collar 2. The operation lever mounting portion 3B is formed in a substantially cylindrical shape shorter than the length of the intermediate portion 12 so that the operation lever attachment portion 3B can be fitted in the front end portion 11 (head 101) of the main body case 1. To be done. A groove 31 is formed in a cylindrical shape at the center of the rear end surface of the rotary drive unit 3A, and the engaging recesses are formed at positions of the rear end of the peripheral surface facing each other so as to engage with the engaging protrusions 21 of the collar 2, respectively. 30 is formed (see FIG. 2), and a mounting groove 32 for the O-ring 95 is also formed in the intermediate portion of the peripheral surface. As shown in FIG. 5, a part of the peripheral surface (peripheral wall) of the operation lever mounting portion 3B is cut out corresponding to the cutout portion 110 of the main body case 1 to form a cutout portion 33. A shaft insertion portion 35 is formed on the surface (peripheral wall) at a position close to the cutout portion 33 and diametrically opposed to the cutout portion 33. Further, a groove 36 for the C-shaped retaining ring 91 is formed on the rear end side of the outer peripheral surface of the operation lever mounting portion 3B (see FIG. 3). The inner peripheral surface of the operation lever mounting portion 3B is formed in a substantially U shape, and both end surfaces of the peripheral surface (peripheral wall) of the operation lever mounting portion 3B are both end surfaces of the peripheral surface (peripheral wall) of the main body case 1 (front end portion 11). It is formed in substantially the same position as that of the rotary shaft (shaft 34) of the operation lever 3C described later. As shown in FIG. 3, a click leaf spring 37 is installed on the inner bottom portion of the operation lever attachment portion 3B. As shown in FIG. 7, the click leaf spring 37 is composed of two substantially rectangular leaf springs 371, and each leaf spring 371 has a substantially trapezoidal cross section so as to be engageable with each stopper portion 39 of the operation lever 3C described later. It has a (substantially isosceles trapezoidal shape), and two sheets are stacked and arranged on the bottom portion inside the operation lever attachment portion 3B. When a flat leaf spring generally used for the click leaf spring 37 is used, when the flat leaf spring is pressed by each stopper portion 39 of the operation lever 3C, the stress concentrates on the central portion of the leaf spring, which causes plastic deformation ( Is likely to cause fatigue and has a short life. On the other hand, by adopting a substantially trapezoidal leaf spring 371 for the click leaf spring 37, when the stopper portion 39 of the operation lever 3C is pressed, the entire leaf spring 371 bends, and the whole leaf spring 371 bends. The bending disperses the stresses, eliminating plastic deformation and prolonging life. As shown in FIGS. 3 and 5, the operation lever 3C is formed by zinc die casting along the front end portion 11 of the main body case 1 and both end surfaces of each peripheral surface (peripheral wall) of the operation lever mounting portion 3B. 11 and the operation lever mounting portion 3B are formed in a substantially rectangular plate shape so as to be able to be laid down on the bottoms of the notch portions 110 and 33, and one side portion thereof can be fitted into the operation lever mounting portion 3B and the operation lever. A shaft insertion portion 38 is formed in a cylindrical shape so as to be able to communicate with the shaft insertion portion 35 of the mounting portion 3B. Further, as shown in FIG. 7, the operation lever 3C has stopper portions 39 each presenting a flat surface on each portion of the operation lever attachment portion 3B facing the bottom portion of the operation lever attachment portion 3B at the operation position and the storage position. Further, as shown in FIG. 8, the operation lever 3C is formed with circular holes 40 penetrating through both corners on the front side, and is attached to the hole 40 through a commonly used ring-shaped closure 97. It is possible. In this case, the closure 97 is an integrally molded plastic product, and is composed of a string-shaped portion 971 and a connecting portion 972 provided at one end thereof, and the string-shaped portion 971 is bent into a ring shape or a loop shape. This is a type in which the other end of 971 is inserted into the connecting part 972 to be connected, and once the other end of the cord-shaped part 971 is connected to the connecting part 972, it will not come off.
In this operation lever 3C, as shown in FIG. 5, the shaft insertion portion 38 is fitted into the operation lever attachment portion 3B, and the shaft 34 is inserted through one of the shaft insertion portions 35 of the operation lever attachment portion 3B. It is inserted into the portion 38, passed through the other of the shaft insertion portions 35 of the operation lever attachment portion 3B, and both ends are crimped in a trumpet shape to be attached. In this way, as shown in FIG. 7, the operation lever 3C has an operation position in which the operation lever attachment portion 3B is projected forward from the operation lever attachment portion 3B along the axial direction of the rotation drive portion 3A. It is rotatably mounted in the operating lever mounting portion 3B between the operating lever mounting portion 3B and the storage position in which the operating case 3 is laid down through the notches 33 and 110 of the main body case 1 and the stopper portions 39 of the operating lever 3C. By engaging with the click leaf spring 37 in the operation lever attachment portion 3B, the operation lever 3C in the operation position and the storage position is held.
As shown in FIG. 3, in the operating portion 3, an O-ring 95 is fitted in the mounting groove 32 on the peripheral surface of the rotary drive portion 3A, and a C-shaped fastening ring 91 is fitted in the groove 36 on the peripheral surface of the operating lever mounting portion 3B. Is rotatably mounted, and the rotary drive portion 3A is inserted into and arranged in the intermediate portion 12 of the main body case 1, that is, the intermediate portion 12 of the shaft 102 so as to be continuously inserted into the collar 2 through the peripheral surface of the rotary drive portion 3B. The locking projections 21 of the collar 2 are engaged and operatively connected to the engagement recesses 30 at the rear end (see FIG. 2), and the operation lever mounting portion 3B is connected to the front end 11 of the main body case 1, that is, the head. The notches 33 and 110 are fitted together in 101, and the C-shaped retaining ring 91 is engaged with the groove 111 in the head 101 to be prevented from coming off.

As shown in FIG. 2, the lock shaft 4 is fitted in the collar 2 and protrudes from the rear end portion 13 of the main body case 1.
In this case, as shown in FIG. 3, the lock shaft 4 can be fitted into the inner peripheral surface of the rear end portion 13 of the main body case 1 by stainless steel, and can be inserted into the main body case 1 so as to be inserted into the front end side. The substantially half portion is formed in a cylindrical shape, and a screw 41 is cut on the outer peripheral surface of the rear end side substantially half portion protruding rearward from the main body case 1. It should be noted that the substantially half portion on the rear end side is formed to have an oval cross section, and two flat surfaces 42 are formed on the outer peripheral surface, and these two flat surfaces 42 are not threaded. On the outer peripheral surface of the substantially half portion on the front end side of the lock shaft 4, an operation pin insertion portion 43 is provided at a predetermined position on the front end portion in a diametrical direction, and a regulation pin insertion portion 44 is provided at a predetermined position in an intermediate portion in a diametrical direction. The through holes are formed in parallel with each other, and a receiving portion 45 for the compression coil spring 8 is formed in a concave shape on the front end surface.
As shown in FIG. 3, the lock shaft 4 is arranged such that a substantially half portion on the front end side is inserted and inserted into the collar 2 in the main body case 1, and a substantially half portion on the rear end side is the rear half of the main body case 1. It projects from the end 13 to the outside.

As shown in FIG. 1, the operating pin 5 is provided so as to penetrate in the diametrical direction on the front end side of the lock shaft 4, and both ends thereof are inserted into the pair of guide grooves 22 of the collar 2.
In this case, as shown in FIG. 2, the operating pin 5 is formed of stainless steel into a cylindrical shape that can be inserted into the operating pin inserting portion 43 of the lock shaft 4 and is slightly longer than the operating pin inserting portion 43. 4 through the operation pin insertion portion 43 on the front end side, and both ends are engaged with the pair of spiral guide grooves 22 of the collar 2. The operation pin 5 and the lock shaft 4 integrate the operation lever 3C, the operation lever mounting portion 3B, and the collar 2.
As shown in FIG. 1, the restriction pin 6 is provided in the intermediate portion of the lock shaft 4 so as to penetrate therethrough in the diametrical direction, and both ends thereof are arranged in the restriction grooves 131 of the main body case 1.
In this case, as shown in FIG. 2, the regulation pin 6 is formed of carbon steel into a cylindrical shape that can be inserted into the regulation pin insertion portion 44 of the lock shaft 4 and is slightly longer than the regulation pin insertion portion 44. 4 Both ends are engaged with the respective regulation grooves 131 of the main body case 1 by being passed through the regulation pin insertion portion 44 at the intermediate portion.
The operation pin 5 and the regulation pin 6 are attached to the insertion portions 43 and 44 of the lock shaft 4 in parallel.
As shown in FIG. 2, the stopper plate 7 is provided on the rear portion of the lock shaft 4, protrudes to the side of the lock shaft 4, and is engaged with and disengaged from a receiving portion provided in the box body.
In this case, as shown in FIG. 3, the stopper plate 7 is formed by bending an elongated plate material formed of hard steel wire into a substantially crank-shaped cross section, and has a hole 70 formed at one end through which the lock shaft 4 can be inserted. The other end is an engaging part 71 that abuts against a receiving part provided in the box body.
As shown in FIG. 3, the stopper plate 7 has a rear end portion of the lock shaft 4 projecting from the rear end portion 13 of the main body case 1 passed through a hole 70 at one end, and both sides of the stopper plate 7 are toothed. The hexagon nut 94 is tightened and fixed via the washer 93, and is attached, and the engaging portion 71 is arranged at a predetermined position around the main body case 1.
As shown in FIG. 3, the compression coil spring 8 is inserted into the groove 31 of the rotation drive unit 3A of the operation unit 3 and biases the lock shaft 4 rearward.
In this case, the compression coil spring 8 is formed of a hard steel wire, one end side of which is inserted and arranged in the groove 31 of the rear end face of the rotation drive unit 3A, and the other end of which is arranged in the receiving portion 45 of the front end face of the lock shaft 4. The compression coil spring 8 compresses between the rotary drive unit 3A and the lock shaft 4, and normally pushes and urges the lock shaft 4 rearward.

In this way, the fastening fastener F is attached by fixing the body case 1 to the door D as shown in FIG.
In this case, in the main body case 1, the stopper plate 7 is removed from the lock shaft 4, the waterproof packing 92 is arranged on the rear surface of the front end portion of the main body case 1, and the mounting hole formed in the door D from the front side of the door D. D0 is inserted from the rear end portion 13 side of the main body case 1, and the rear surface of the front end portion 11 of the main body case 1 is brought into contact with the front surface of the door D via the waterproof packing 92, and on the rear surface side of the door D, at the rear of the main body case. A toothed washer 93 and a hexagon nut 94 are sequentially passed from the end portion 13 to the intermediate portion 12 (see FIG. 2), and by tightening the hexagon nut 94, the rear surface of the front end portion 11 of the main body case 1 has a waterproof packing 92 interposed therebetween. Is pressed against the front surface of the door D, and is pressed and sandwiched between the front end 11 of the main body case 1 and the hexagon nut 94 to be attached to the door D. After that, the stopper plate 7 is attached as described above.
Further, in this case, as shown in FIG. 8, a sealing tool attaching portion 99 having a hole 992 which can be inserted into the door D or the box body or its vicinity by inserting the ring-shaped sealing tool 97 is also attached. Be done. In this case, the closure attachment part 99 is composed of a metal plate 991, and a hole 992 through which the closure 97 can be inserted is provided in a part of the plate 991. The sealing device 97 is as described above.
In the fastening fastener F, as shown in FIG. 9, the collar 2 is rotated by rotating the operating portion 3 in one direction by the operating lever 3C, and the pair of spiral guide grooves of the collar 2 are rotated. The lock shaft 4 is pushed out of the main body case 1 and stopped by the engagement guide between the lock pin 22 of the lock shaft 4 and the operating pin 5 of the lock shaft 4 and the guide pin 6 of the recess 132 of the main body case 1 and the restriction pin 6 of the lock shaft 4. The gold 7 linearly moves from a locking position where it is locked by locking it to the receiving portion to a rear facing position, and a pair of spiral guide grooves 22 (rear end) of the collar 2 and the lock shaft 4 that follow. The lock shaft 4 is rotated by the engagement guide with the operation pin 5 and the engagement guide between the regulation pin 6 of the lock shaft 4 and each regulation groove 131 of the body case 1, and the stopper plate 7 is received by the receiving portion B1 of the box body. Rotates to locking release position not facing the rear of the opposed position against.
On the contrary, when the operating portion 3 is rotated in the other direction by the operating lever 3C, the collar 2 is rotated and the pair of spiral guide grooves 22 (rear end) of the collar 2 and the operating pin of the lock shaft 4 are rotated. 5, the lock shaft 4 rotates by the engagement guide between the lock pin 4 of the lock shaft 4 and the lock pin 6 of the lock shaft 4, and the lock groove 4 of the box body B. To the opposite position to the receiving portion from the rear to the engaging position between the pair of spiral guide grooves 22 of the collar 2 and the operating pin 5 of the lock shaft 4 and the lock of the concave portion 132 of the main body case 1. The lock shaft 4 is pulled into the main body case 1 by the engagement guide of the shaft 4 with the restriction pin 6, and the lock 7 is locked by tightening to the receiving portion from a position opposite to the receiving portion at the rear. To the stop position Line to move. At the same time, the operating portion 3 is rotated by accommodating the operating lever 3C in the retracted position in the operating lever mounting portion 3B through the cutout portions 33 and 110 of the operating lever mounting portion 3B and the front end portion 11 of the main body case 1 and storing it. At the same time, the operation lever 3C at the stored position displays a normal engagement state between the stopper plate 7 and the receiving portion.

FIG. 10 specifically shows the operation of tightening the door by the tightening fastener F.
In FIG. 10 (1), the clasp 7 of the fastening fastener F is linearly moved rearward with respect to the receiving portion B1 of the box body to a predetermined distance and rotated by a predetermined angle (120 ° in this case). The door is in a lock release position that does not face the receiving portion B, and the door is not fastened and fixed to the front surface of the box body. The box body and the door are not shown. Further, in this case, as shown in FIG. 7A, the operation lever 3C is projected forward from the operation lever mounting portion 3B along the axial direction of the rotary drive portion 3A (that is, at the operation position), At this time, due to the engagement of the stopper portion 39 of the operation lever 3C and the click leaf spring 37 in the operation lever attachment portion 3B, that is, the stopper portion 39 of the operation lever 3C presses and deforms the click leaf spring 37, and the click leaf plate 37 is deformed. The operating force of the spring 37 holds the operating lever 3C at this operating position.
In the tightening operation of the tightening fastener F, first, as shown in FIG. 9A, the operation portion 3 is moved in the other direction by the operation lever 3C, in this case, a predetermined angle clockwise (120 ° in this case). By rotating the collar 2, the collar 2 is rotated in the same direction in the main body case 1. At this time, the operation pin 5 of the lock shaft 4 is engaged with the rear ends of the pair of spiral guide grooves 22, so that the lock shaft 4 rotates in the same direction as the collar 2 and the lock pin 4 and the regulation pin. Both ends of 6 are rotated on each regulation groove 131 from the other end toward the one end. Due to the rotation of the lock shaft 4, the stopper plate 7 is rotated from the lock release position toward the rear position facing the receiving portion B1 of the box body. Then, as shown in FIG. 9B, when the restriction pin 6 reaches one end of each restriction groove 131, the stopper plate 7 faces the receiving portion B1 of the box body at the rear. Subsequently, as shown in FIG. 9C, the operation pin 3 is further rotated in the same direction by a predetermined angle (126 ° in this case) by the operation lever 3C, whereby the regulation pin 6 of the lock shaft 4 is moved to the main body. It moves into the concave portion 132 of the case 1 and is moved forward on the concave portion 132 to regulate the rotation of the lock shaft 4, whereby the operating pin 5 of the lock shaft 4 rotates. By the guide of the spiral guide groove 22 (oblique groove from the rear end to the front end) (see FIG. 3), the guide shaft 22 is linearly moved forward, and in conjunction with this, the lock shaft 4 is linearly moved forward. And is drawn into (the shaft 102 of) the main body case 1. Then, as shown in FIG. 9 (4), the restriction pin 6 of the lock shaft 4 reaches the front end of each recess 132 of the main body case 1, and the actuation pin 5 of the lock shaft 4 guides the pair of spiral guides of the collar 2. When the front end of the groove 22 is reached (see FIG. 3), the lock shaft 4 is pulled into the main body case 1 by the moving distance of the operating pin 5, and the stopper plate 7 engages with the receiving portion B1 to tighten and lock. To do. Following this, the operation lever 3C is collapsed and stored in the operation lever attachment portion 3B (that is, the storage position). At this time, as shown in FIG. 7B, the stopper portion 39 of the operation lever 3C is engaged with the click plate spring 37 in the operation lever mounting portion 3B, that is, the stopper portion 39 of the operation lever 3C is clicked. The operation lever 3C at the storage position is held by the reaction force generated by the click leaf spring 37 when the spring 3 is pressed and deformed. As a result, the operation section 3 is stopped from rotating, and the regular engagement state between the stopper plate 7 and the receiving section B1 is displayed by the operation lever 3C at the storage position. That is, in the structure of the fastening fastener F, if the stopper 7 is not completely locked, that is, if the stopper 7 is not securely engaged with the receiving portion B1, the operation lever 3C is operated. Although it cannot pass through the notches 33, 110 of the mounting portion 3B and the main body cover 1 and cannot fall down to the storage position (see FIG. 5), it is completely locked by the stopper 7, that is, the stopper 7 is When securely engaged with the receiving portion B1, the operation lever 3C can be passed through the notch portions 33, 110 of the operation lever mounting portion 3B and the main body cover 1 and fall down to the storage position ( (See FIG. 5), the state in which it is completely locked by the stopper 7 is held by the rotation stopper of the operation portion 3 and the operation lever 3C is laid down to the storage position, so that the stopper 7 completely locks it. Visually check the condition You can be sure.
The operation of the fastening fastener F when opening the door is the opposite of the above.

  In this tightening fastener F, when the tightening fastener F has a size substantially equal to the tightening fastener of Patent Document 1, the tightening stroke of the stopper plate 7 is 5.5 mm, and the tightening stroke is 2 mm compared to the conventional one. Be postponed. As a result, as shown in FIG. 11, the packing is attached to the peripheral edge of the opening of the box body, and even if the packing is thick and the door is largely pushed back by the reaction force of the packing, the stopper plate 7 is attached to the box body. Without hitting the edge of the opening, it securely engages with the receiving portion B1 of the box body and tightens and locks it. As a result, the door is fastened and fixed to the front surface of the box body by compressing the packing to form a reliable sealed state.

  Further, in this fastening fastener F, as shown in FIG. 8, a hole 40 is provided in the operation lever 3C so that an existing sealing device 97 can be inserted therethrough, and the sealing device 97 is provided in the door or the box body or in the vicinity thereof. Since the closure attachment part 99 having the insertable hole 992 is attached, the cord-like part 971 of the closure 97 is inserted between the hole 40 of the operation lever 3C and the hole 992 of the closure attachment part 99. By inserting the other end of the string-shaped portion 971 into the coupling portion 972 to attach it in a loop shape and lock the operation lever 3C, the door can be easily sealed.

As described above, according to the tightening fastener F, as described above, the collar 2 is rotated by rotating the operating portion 3 in one direction by the operating lever 3C to rotate the pair of spirals of the collar 2. The lock shaft 4 is pushed out from the main body case 1 by the engagement guide between the guide groove 22 and the actuating pin 5 of the lock shaft 4 and the recess 132 of the main body case 1 and the restriction pin 6 of the lock shaft 4. And then the stopper plate 7 is linearly moved from a locking position where it is tightened and locked to the receiving portion to a rear facing position, and the spiral guide grooves 22 of the collar 2 and the lock shaft 4 are subsequently operated. The lock shaft 4 is rotated by the engagement guide with the pin 5 and the engagement guide between the restriction pin 6 of the lock shaft 4 and each restriction groove 131 of the main body case 1, and the stopper 7 opposes the receiving portion rearward. By rotating the operating portion 3 in the other direction by operating the operating lever 3C, the collar 2 is rotated, and the spiral guide grooves of the collar 2 are rotated. The lock shaft 4 is rotated by the engagement guide between the locking pin 22 of the lock shaft 4 and the operation pin 5 of the lock shaft 4, and the engagement guide of the restriction pin 6 of the lock shaft 4 and each restriction groove 131 of the main body case 1. It rotates from the unlocked position to the opposite position to the receiving part rearward, and then the engagement guide between the pair of spiral guide grooves 22 of the collar 2 and the operating pin 5 of the lock shaft 4 and the main body case 1 are continued. The lock shaft 4 is drawn into the main body case 1 by the engagement guide between each recess 132 and the restriction pin 6 of the lock shaft 4, and the stopper plate 7 is tightened from the opposite position to the receiving part to the receiving part. Lock Since it is linearly moved to the locking position, the tightening stroke of the stopper plate 7 is greatly increased by the pair of spiral guide grooves 22 extending from one end side to the other end side of the collar 2, and the door and the box are closed. Even if the packing arranged between the main body and the main body is thick, the lock 7 can be reliably locked by preventing the stopper 7 from coming into contact with the box main body.
In particular, in this tightening fastener F, the pair of spiral guide grooves 22 of the collar 2 are provided with long holes 220 in the circumferential direction at two positions where the circumferential surface of the collar 2 faces each other in the vicinity of the front end of the circumferential surface. Formed from each of the slots 220 diagonally in the opposite direction to each other in the circumferential direction, and cut out to two mutually opposing positions close to the rear end of the circumferential surface within a range of a circumferential angle of 110 ° to 140 °, and have a substantially serpentine shape. Since each guide groove 22 is formed as long as possible, the length of each guide groove 22 can be made as long as possible, and the inclination angle of each guide groove 22 with respect to the axis can be made as gentle as possible. Can be smoothly slid along each guide groove 22 to lighten the turning operation of the operation lever 3C.
Further, in this fastening fastener F, when the operating portion 3 is rotated in the other direction by the operating lever 3C, when the lock 7 is tightened and locked in the receiving portion, the operating lever 3C is also operated. The operation portion 3 is stopped and rotated by stopping the operation portion 3 through the cutout portions 33 and 110 of the operation lever mounting portion 3B and the main body case 1 at the storage position in the lever mounting portion 3B, and the stopper 7 and the receiving portion are held together. Since the normal engagement state is displayed, the tightening fastener F can be securely locked and held, and the stopper 7 can be secured only by visual observation from the outside of the operation handle 3C. It is possible to confirm whether or not the receiving portion is engaged at the regular position, that is, whether or not the door is securely locked (fixed) to the box body.

Furthermore, this fastening fastener F has the following advantages.
In this tightening fastener F, the operation lever 3C has a stopper portion 39 having a flat surface at each portion of the operation lever attachment portion 3B facing the bottom portion of the operation lever attachment portion 3B at the operation position and the storage position, and the operation lever attachment portion 3B. Has a leaf spring 371 having a substantially trapezoidal cross section so that it can engage with each stopper portion 39 of the operation lever 3C, and the engagement of each stopper portion 39 with the leaf spring 371 causes the operation lever at the operation position and the storage position. Since 3C is held, when operating the operation lever 3C, the operation lever 3C is firmly projected to the front of the operation portion 3 (toward the operator's side) to rotate the operation lever 3C. The operation lever 3C can be smoothly operated, and when the operation lever 3C is stored, the operation lever 3C can be securely stored without rattling the storage position in the operation lever mounting portion 3B. It can be.
In this fastening fastener F, a closure fitting having a hole 40 through which the existing ring-shaped closure 97 can be inserted in the operation lever 3C and a hole 992 through which the closure 97 can be inserted in the door or the box body or its vicinity. Since the part 99 is attached and the closure 99 is inserted and locked between the hole 40 of the operation lever 3C and the hole 992 of the closure attachment part 99 to close the door, the tightening fastener F can be easily installed. Moreover, the door can be locked securely and the door can be easily and reliably sealed.

F Tightening fastener 1 Main body case 101 Head 102 Shaft 11 Front end part 110 Notch part 111 Groove 12 Intermediate part 121 Screw 122 Flat surface 13 Rear end part 131 Restriction groove 132 Recess 2 Collar 21 Collar projection 22 Guide groove 220 Long hole 3 Operation Part 3A Rotational drive part 30 Engagement concave part 31 Groove 32 Mounting groove 3B Operation lever mounting part 33 Notch part 34 Shaft 35 Shaft insertion part 36 Groove 37 Click leaf spring 371 Leaf spring 3C operation lever 38 Shaft insertion part 39 Stopper part 40 hole 4 Lock Shaft 41 Screw 42 Flat 43 Operation Pin Insertion Part 44 Control Pin Insertion Part 45 Receiving Part 5 Operation Pin 6 Control Pin 7 Stopper 70 Hole 71 Engagement Part 8 Compression Coil Spring 91 C-Type Stop Ring 92 Waterproof Packing 93 Toothed Washer 94 Hexagon nut 95 O-ring 97 Sealing device 971 String portion 9 2 coupling portion 99 closure attachment portion 991 plate 992 hole B box body B1 receiving portion D door or lid D0 mounting hole

Claims (4)

A fastening fastener that is attached to a door or lid that opens and closes the front opening of the box body, and that is used to tighten and fix the door or lid to the box body.
The inner peripheral surface is formed into a substantially cylindrical shape with a small-diameter cylindrical shape at the rear end, a medium-diameter cylindrical shape at the middle part, and a large-diameter cylindrical shape at the front end, and is parallel to the front surface of the box body at the rear end. A main body case having two restriction grooves that are diametrically opposed to each other, having a recess that extends toward the front at one end of each restriction groove, and having a notch in a part of the peripheral surface of the front end;
A position that has a substantially cylindrical shape rotatably within the cylindrical shape of the middle part of the main body case, has a locking protrusion or an engaging recess at the front end of the peripheral surface, and faces the peripheral surface at the front end side of the peripheral surface. It has a pair of guide grooves consisting of a pair of slits extending from two locations in opposite spiral directions in a spiral shape to two locations facing each other on the rear end side of the peripheral surface in a spiral shape, and has a cylindrical shape in the middle part of the main body case. The collar to be inserted inside,
A cylindrical shape is rotatably provided in the cylindrical shape of the intermediate portion of the main body case, and an engaging recess or engaging projection that is engageable with the engaging protrusion or engaging recess of the collar is provided at the rear end of the peripheral surface. A rotary drive portion having a groove on the rear end surface thereof, formed in a substantially cylindrical shape that can be continuously fitted to the front end portion of the rotary drive portion into a large-diameter cylindrical shape of the front end portion of the main body case, An operation lever mounting part having a notch part communicating with the notch part of the main body case in a part of the surface, and a shaft of the rotation drive part from the operation lever mounting part via a shaft in the operation lever mounting part. From an operation lever rotatably attached between an operation position protruding along a direction and a storage position in which the operation lever attachment portion and the cutout portion of the main body case fall down inside the operation lever attachment portion. And the operating part
A lock shaft that is inserted into the collar and projects from the rear end of the main body case,
An operating pin that is provided so as to pass through in the diametrical direction on the front end side of the lock shaft, and has both ends inserted into the guide grooves of the collar,
A restriction pin that is provided to penetrate through the middle portion of the lock shaft in a diametrical direction and has both ends arranged in a restriction groove of the main body case,
A stopper plate provided at the rear portion of the lock shaft, protruding laterally of the lock shaft, and disengaged from a receiving portion provided in the box body,
A compression coil spring that is inserted into a groove of the rotation drive unit and biases the lock shaft toward the rear;
Equipped with
The main body case is attached to the door or the lid by being fixedly attached,
By rotating the operating portion in one direction by the operating lever, the collar is rotated to guide engagement between the spiral guide groove of the collar and the operating pin of the lock shaft, and the main body case. The lock shaft is pushed out of the main body case by the engagement guide between the recessed portion of the lock shaft and the restriction pin of the lock shaft, and the lock shaft is pushed backward from the lock position to lock the lock plate to the receiving portion. Linearly moving to the facing position, and subsequently following the engagement guide between the spiral guide groove of the collar and the operating pin of the lock shaft, and the restriction pin of the lock shaft and the restriction groove of the main body case. The lock shaft is rotated by the engagement guide, and is rotated from the rear facing position to the lock releasing position not facing the catch with respect to the catch.
On the contrary, by rotating the operation portion in the other direction by the operation lever, the collar is rotated, and the engagement guide between the spiral guide groove of the collar and the operation pin of the lock shaft and The lock shaft is rotated by the engagement guide between the restriction pin of the lock shaft and the restriction groove of the main body case, and the stopper plate is moved from the unlocked position to a position facing the receiving portion at a rear position. The lock is rotated by the engagement guide between the spiral guide groove of the collar and the operation pin of the lock shaft and the engagement guide between the recess of the main body case and the restriction pin of the lock shaft. The shaft is drawn into the main body case, and the stopper plate is tightened and locked to the receiving portion from a position facing the receiving portion at a rear position. By moving the operation lever linearly to the locking position, and at the same time, storing the operation lever in the accommodation position in the operation lever attachment portion by retracting the operation lever attachment portion and each of the notches of the main body case to store the operation lever. While stopping the rotation of the operation portion, the operation lever at the storage position displays a normal engagement state between the stopper plate and the receiving plate,
Fastening fastener characterized by that.   The pair of guide grooves are provided with long holes in the circumferential direction at two positions on the circumferential surface of the collar which are close to the front end of the circumferential surface and are opposed to each other, and are slanted in opposite circumferential directions from each of the elongated holes. The fastening fastener according to claim 1, wherein the fastening fastener is formed in a substantially serpentine shape by cutting out at two positions facing each other in the vicinity of the rear end of the circumferential surface within a range of a circumferential angle of 110 ° to 140 °.   The operation lever has a stopper portion that presents a flat surface at each portion of the operation lever attachment portion facing the bottom portion of the operation lever attachment portion at the operation position and the storage position, and each stopper of the operation lever is provided at the bottom portion of the operation lever attachment portion. 3. A leaf spring having a substantially trapezoidal cross-section which can be engaged with a portion, and holds the operation lever in the operation position and the storage position by engaging the stopper portions with the leaf spring. Tightening fastener described.   The operation lever has a hole through which a ring-shaped closure can be inserted, and a door fitting, a lid, a box body, or the vicinity thereof is provided with a closure attachment part having a hole through which the closure can be inserted, and the operation lever has a hole. The fastening fastener according to any one of claims 1 to 3, wherein the closure is passed through and locked between a hole of the closure attachment part and a hole of the closure attachment part to close the door or the lid.

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