JP6647175B2 - Small braking hinge - Google Patents

Description

  The present invention relates to a small brake hinge for a take-out lid of a condominium collective mailbox or the like, and more particularly to a small brake hinge capable of accurately stopping the lid at a predetermined opening / closing position.

  Mailboxes are installed in condominiums and private homes to store mail, and large condominiums require a large number of mailboxes to be compactly installed. An ordinary mail box has a separate intake lid for opening and closing an opening for putting in mail, and a separate extraction lid for opening and closing an opening for drawing out the mail. JP-A-2006-288470, JP-A-2007-613, JP-A-2013-212194, and the like are exemplified as existing mail receiving devices. The take-out lid is rotatable by a support shaft.

  If the take-out lid of the mail box is rotatably supported only by the support shaft, the hand or mail may be damaged due to the impact of sudden rotation when opening the lid or the sudden closing of the upper and lower lids that are opened upward, There is a risk of dropping mail. In Japanese Patent Application Laid-Open No. 2007-613, a cylinder which is a pneumatic bumper is attached to a side of a take-out opening, and when a take-out lid is opened, a part of the cylinder comes into contact with a cylinder rod at the end of the turn, so Although the impact is mitigated, it is difficult to secure a place for installing the pneumatic bumper in a compact mail box, and the installation of the pneumatic bumper makes the mail box expensive, which is not practical.

  On the other hand, the present applicant has already proposed many metal hinges for braking rotation, and Japanese Patent Application Laid-Open Nos. 2004-169870, 2005-9547, and 2007-139012 filed by the present inventors have been proposed. Exists. In particular, in Japanese Patent Application Laid-Open No. 2004-169870, a part thereof can be applied to a take-out cover of a mail box. For example, by using the movable body, the braking member, and the washer disclosed in Japanese Patent Application Laid-Open No. 2004-169870 in a reduced size, the movable body, that is, the take-off lid, can be braked and rotated. As a result, the take-out lid can be stopped at an arbitrary opening position, the sudden rotation of the take-out lid is reduced, and the impact due to the sudden rotation when the take-out lid is opened and the sudden movement of the upper and lower lids opened upward are suddenly caused. Closure can be prevented.

JP 2006-288470 A JP 2007-613A JP 2013-212194 A JP 2004-169870 A JP 20059547 A JP 2007-139012 A

  When the braking mechanism disclosed in Japanese Patent Application Laid-Open No. 2004-169870 is used with respect to the take-out lid of the condominium mailbox, the take-off lid can be braked and rotated, but the take-out lid is rotated and completely closed in the vertical direction. However, due to the internal stress of the braking member, the take-out lid is likely to eventually stand still slightly open. If the take-out lid is slightly opened when closed, not only is the appearance of the mail box unfavorable, but also the mail stored in the mail box may go outside. For this reason, in the conventional mail box, a locking hook for completely closing the take-out lid is provided, and when the take-out lid is completely closed, the hook is hooked and stopped at that position. Pulling the lock hook releases the locking hook and enables rotation.

  The locking hook for the take-off lid is one of the factors that increase the cost in a relatively inexpensive mailbox. Further, if the take-out lid is repeatedly opened and closed, a failure of the locking hook is likely to occur. If the locking hook is broken, repair costs will be incurred. The beauty of the box gets worse.

  The present invention has been proposed in order to improve the above-mentioned problems relating to the conventional take-out cover of a mail box and to further improve a small brake hinge. It is an object of the present invention to provide a small brake hinge which, when reached, gives a click feeling and can be stopped reliably. Another object of the present invention is to provide a post box having a movable body such as a lid, a shelf, or a window, or to incorporate it into furniture, fittings, or the like, so that a locking hook is not required, so that the entire hinge is relatively inexpensive and the structure is simple. It is an object of the present invention to provide a small-sized braking hinge which can be further reduced in size.

  The miniature braking hinge according to the present invention comprises a wear-resistant plastic braking sleeve having a circular hole, and a rotatable metal pivot pressed into the circular hole of the braking sleeve. In the compact brake hinge of the present invention, a shallow wide groove is formed in the inner peripheral wall of the circular hole of the braking sleeve in the axial direction, while the pivot is provided with a wide convex portion corresponding to the wide groove in the axial direction. When the pivot is press-fitted into the braking sleeve, the outer peripheral surface of the pivot projection and the inner peripheral surface of the braking sleeve become a friction braking surface, and the rotation of the braking sleeve or pivot causes the wide groove of the braking sleeve to become the wide projection of the pivot. If it matches, a click feeling is generated and the operation stops.

  In another small braking hinge according to the present invention, a shallow wide groove is formed in the outer peripheral wall of the pivot in the axial direction, while a wide convex portion corresponding to the wide groove is provided in the braking sleeve in the axial direction. When the pivot is press-fitted into the braking sleeve, the outer peripheral surface of the pivot and the inner peripheral surface of the wide convex portion of the braking sleeve become a friction braking surface, and the rotation of the braking sleeve or pivot causes the wide groove of the pivot to move to the braking sleeve. If it coincides with the wide convex portion, a click feeling is generated and the operation stops.

  In the hinge according to the present invention, it is preferable that a pair of wide grooves or wide convex portions are provided in the braking sleeve and the pivot, respectively, in a symmetry with respect to the axial center.

  Another small brake hinge according to the present invention is used to open and close a take-out lid of a mail box. In the small brake hinge of the present invention, the brake sleeve is fixed to the take-out lid, the pivot is locked on the front surface of the box body, and a shallow wide groove is formed in the inner peripheral wall of the circular hole of the brake sleeve in the axial direction. By providing a wide convex portion corresponding to the wide groove in the pivot in the axial direction, the inner peripheral surface of the braking sleeve and the outer peripheral surface of the convex portion of the pivot become a friction braking surface, and the lid is taken out at any position. When the wide groove of the braking sleeve coincides with the wide convex portion of the pivot due to the rotation, the take-off lid stops accurately with a click feeling.

  In a small brake hinge used to open and close a take-out cover of a mail box, the take-in cover rotates together with the take-out cover when taking out a postal matter, and rotates independently when storing a postal matter, thereby rotating the box body. Preferably, it can be opened.

  The small brake hinge according to the present invention usually consists only of a brake sleeve made of wear-resistant plastic and a pivot made of metal, and is relatively inexpensive because of its simple structure. With the small-sized brake hinge of the present invention, when the movable body such as the take-out lid reaches an arbitrary opening / closing angle, a click feeling is generated and the movable body can be accurately stopped. This does not occur, and a member such as a locking hook to be attached for secure stop is not required.

  In the small-sized brake hinge according to the present invention, when the braking sleeve and the pivot are provided with a pair of wide grooves and wide projections with axial symmetry, respectively, the click feeling becomes clearer and the movable body such as a lid or an opening / closing door is provided. Can be stopped reliably. In the small braking hinge of the present invention, if the width of the wide groove and the wide convex portion is reduced and the number is increased, the click feeling can be generated not only at 180 degrees but also at every 90 degrees or 45 degrees. is there.

  The small-sized brake hinge according to the present invention can stop a movable body such as a take-off lid at a predetermined rotation position, and is only approximately the same size as a conventional small-sized pivot pin. For this reason, when the small braking hinge of the present invention is used as it is in the place where the conventional small pivot pin is attached, it can reliably stop with a click feeling at a predetermined opening and closing angle. It can be reliably stopped at an opening angle of 45 degrees, and the application is almost the same as a conventional metal hinge. For a mailbox, a furniture, a fitting, a container, a keyboard instrument, or the like having various movable bodies, a braking sleeve may be attached to a connection point between the movable body and the base material with a wood screw or a nail.

It is a perspective view which expands and shows the small braking hinge concerning this invention. FIG. 2 is an enlarged perspective view showing the small brake hinge of FIG. 1 in an exploded manner. FIG. 2 is an enlarged side view showing the small brake hinge of FIG. 1. FIG. 2 is an enlarged end view showing a braking situation with respect to a rotation position of a braking sleeve for the small braking hinge of FIG. 1. FIG. 4 is an enlarged sectional view showing another example of use of the small brake hinge of FIG. 1. It is an expanded sectional view showing a modification of a small brake hinge. FIG. 6 is a front view exemplifying a collective mail box individually provided with a take-out lid to which the small braking hinge shown in FIG. 5 is attached. FIG. 8 is a schematic vertical sectional view showing a take-out lid in the mailbox of FIG. 7. It is a schematic horizontal sectional view which expands and shows the attachment location of a small braking hinge.

  The present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, a small braking hinge 1 according to the present invention includes a braking sleeve 3 having a circular hole 2 and a press-fitting into the circular hole 2 to form the inside of the circular hole. And a pivot 5 which can be braked and turned. In the small braking hinge 1, the braking sleeve 3 rotates as shown in FIG. 8, the braking sleeve is attached to a stationary member and the pivot 5 pivots, and the braking sleeve 3 and the pivot 5 mutually brake. It may rotate.

  In the small braking hinge 1, even if the axial position where the shallow wide grooves 6, 6 are formed on the inner peripheral wall of the circular hole 2 of the braking sleeve 3 is fixed, the pivot 5 having the wide convex portions 7, 7 provided in the axial direction. Alternatively, by changing the mounting angle of the braking sleeve 3, a click feeling is generated in the lid (not shown) at an arbitrary opening angle, and the lid can be stopped. For example, as shown in FIGS. 1 to 3, when the wide projections 7, 7 of the pivot 5 are arranged in the vertical direction, a click feeling is felt when the braking sleeve 3 is rotated 90 degrees in the vertical direction from the position in FIG. Occurs. Further, when the wide projections 7, 7 of the pivot 5 are arranged in the horizontal direction as shown in FIG. 5, a click feeling is generated when the braking sleeve 3 rotates and returns to the position shown in FIG.

  The small brake hinge 1 can be attached to a mail box having furniture such as a lid, a shelf, and a rotating window, furniture, fittings, a container, a keyboard instrument, and the like. For example, as shown in FIG. 7, the small brake hinge 1 is installed on the lid support shaft of the individual receiving box 10 of the collective mail box 8 of the apartment. In this case, as shown in FIG. 8, the braking sleeve 3 may be attached to a movable body such as the take-out lid 12, and the pivot 5 may be locked to the support arm 16 of the box body 14.

  The braking sleeve 3 is made of a wear-resistant plastic, and is made of, for example, a carbon-containing POM (polyacetal) resin, and can be colored in an appropriate color depending on the application. As shown in FIG. 1, the braking sleeve 3 is elongated and has a circular hole 2 in the axial direction so as to generate a certain amount of torque. For example, the total length is 30 mm, and the inner diameter of the circular hole 2 is about 3 mm. The inner diameter of the peripheral surface of the circular hole 2 excluding the wide grooves 6, 6 is slightly smaller than the outer diameter of the pivot 5. When the pivot is turned after the pivot 5 is press-fitted, the outer peripheral surface of the pivot 5 becomes The brake rotation can be performed by contacting the inner peripheral surface of the sleeve circular hole 2 except for 6.

  In the braking sleeve 3, as shown in FIGS. 2 and 4, the shallow wide grooves 6, 6 may be formed in the inner peripheral wall 18 of the circular hole 2 so as to be axially symmetrical in the axial direction. The depth of the wide grooves 6, 6 varies depending on the physical properties of the resin used, the desired torque, the hinge dimensions, and the like, but is generally about 0.07 to 0.15 mm for the circular hole 2 having an inner diameter of 3 mm. Generally, the width of the wide grooves 6 may be about 1 to 2 mm in the circular hole 2 having an inner diameter of 3 mm. The width of the wide grooves 6, 6 is smaller than or equal to the width of the wide projections 7, 7 of the pivot 5, and the bottom wall of the wide groove is concentric with the inner peripheral wall 18 (FIG. 4). The radius of curvature is larger than that of the inner peripheral wall. The bottom walls of the wide grooves 6, 6 need only have the same radius of curvature as the wide protrusions 7 at the same center as the wide protrusions 7, 7 of the pivot 5.

  On the other hand, the pivot 5 is made of metal such as stainless steel, and has an elongated cylindrical shape as shown in FIG. The pivot 5 has a rear part 20 that is pressed into the braking sleeve 3 and a front part 22 that protrudes from the braking sleeve and is locked by a fixed member or a movable member. For example, the pivot rear portion 20 is a partial columnar body formed by cutting both side surfaces in parallel to form flat surfaces 24, 24 (FIG. 4), and the pivot front portion 22 corresponds to the support arm 16 of the box body 14 (FIG. 8). ) Has a modified cross section that can be tightly locked by a modified hole (not shown). The pivot rear portion 20 may be a columnar body having a shallow wide projection protruding in the axial direction, an elliptical columnar body, or the like, in addition to the partial columnar body as illustrated.

  The small braking hinge 1 generates a click feeling every time it is turned by 180 degrees, and according to the width of the wide groove 6 and the wide convex portion 7, in actuality, the torque effective range and the torqueless range as shown in FIG. Since they are separated, it is necessary to make the widths of the wide groove 6 and the wide convex portion 7 smaller in order to make the torqueless range smaller. In the braking sleeve 3, a pair of wide grooves 6, 6 are formed axially symmetrically in the circular hole 2, but only one wide groove shown in FIG. 4 may be used. Can also be reduced to one. Further, the small braking hinge 1 can increase the number by reducing the width length of the wide groove 6 and the wide convex portion 7 even if a click feeling is generated every 180 degrees rotation as shown in FIG. It may be configured such that a click feeling is generated each time the rotation is made.

  FIG. 6 shows a modification of the present invention. In the small braking hinge 28, a pair of wide grooves 32, 32 are formed in the pivot 30, while a pair of wide convex portions 36, 36 are provided in the braking sleeve. . In the wide grooves 32, 32 of the pivot 30, the lateral width is smaller than or about the same as the width of the wide convex portions 36, 36 of the braking sleeve 34, and the bottom wall of the wide groove is concentric with the pivot outer peripheral wall. The radius of curvature is smaller than the outer peripheral wall. The peripheral walls of the wide projections 36 have the same radius of curvature as the circular hole of the braking sleeve 34 at the same center as the circular hole. The small braking hinge 28 generates a click feeling every 180 degrees of rotation, but increases the number by reducing the width length of the wide groove 32 and the wide convex portion 36, and the click feeling becomes every 90 degrees or 45 degrees. May be configured to occur.

  Next, the present invention will be described based on examples, but the present invention is not limited to the examples. The small brake hinges 1 used in this embodiment are respectively installed on the lid supporting shafts of the individual receiving boxes 10 of the collective mail box 8 of the apartment as shown in FIG. In the small-sized brake hinge 1, the wide convex portions 7, 7 of the pivot 5 are horizontally arranged and fixed as shown in FIG. 5, and the brake sleeve 3 is rotated from the position in FIG. 5 to return to the position in FIG. In that case, a click sensation occurs and stops accurately.

  As shown in FIG. 8, in each of the individual receiving boxes 10 of the collective mail box 8, as shown in FIG. Mount movably. The take-out lid 12 having a rectangular flat surface is a plastic hollow article composed of both side plates 38 having a certain width and a front plate 40 orthogonal to the side plates. A rectangular opening 42 is formed above the front plate 40 of the take-out lid 12, and a mail take-in lid 44 that opens and closes the opening is rotatably supported. In FIG. 7, each of the take-out lids 12 includes a dial 46 for inputting a key number on the lower right side of the front plate portion 40 and a horizontal recess 48 directly below the opening 42 on the lower left side of the front plate portion 40. The user can grip the dial 46 to open and close the take-out lid 12, and put his hand in the lateral recess 48 to open and close only the take-in lid 44.

  As shown in FIGS. 1 to 3, the small braking hinge 1 includes a horizontally long braking sleeve 3 having a circular hole 2, and a pivot 5 that is press-fitted into the circular hole 2 and rotatable within the circular hole. The braking sleeve 3 has a substantially D-shaped cross section on the outer periphery, and is provided with three circular projections 52 on the outer peripheral flat surface 50. Further, a rectangular hole 53 is provided at the rear of the braking sleeve 3, and the rectangular hole is used when positioning the braking sleeve 3 or pulling out the pivot 5. When the horizontal flat surface 50 is brought into contact with the upper inner surface of the front plate portion 40, the braking sleeve 3 is inserted into three through holes 54 formed in the upper inner surface as shown in FIGS. The circular projections 52 can be fitted, and then tapping screws 56 are screwed into the through holes 54, respectively, and the braking sleeve 3 is fixed to the upper inner surface of the front plate 40.

  On the other hand, a flat support arm 16 (FIG. 9) having a deformed hole (not shown) is attached to the upper right side of the front of the box body 14 so as to protrude from the front of the main body. The pivot front part 22 has a horizontally long corresponding shape that can be stopped in the state shown in FIG. The pivot front part 22 has a deformed cross section that can be densely inserted into the deformed hole of the support arm 16 of the box body 14, and is inserted into the deformed hole of the support arm and locked. A support arm (not shown) having a circular hole is attached symmetrically to the support arm 16 on the opposite side of the upper part of the front of the box body 14, and is taken out through the circular hole of the support arm, and the left plate portion of the lid 12 is removed. The take-out lid 12 is rotatably supported by rotatably inserting a pin fixed to the take-out cover.

  The mail intake cover 44 has a horizontal portion 58 bent further downward, and a pin (shown in FIG. 9) is attached to the front plate portion 40 of the take-out cover 12 coaxially with the pivot 5 of the brake hinge 1 shown in FIG. Not supported). When the intake lid 44 is opened alone in the direction A, its horizontal portion 58 does not come into contact with the braking sleeve 3 having a D-shaped cross section. Inside the intake cover 44, a number of vertically elongated rectangular plates 60 closely arranged side by side are hung, and each rectangular plate can be turned only backward at the bottom. Can be stored in the box body 14 by pressing, but it is difficult to take out the mail directly from the intake cover 44 because it is shielded by each rectangular plate 60.

  When taking out the mail stored in each individual receiving box 10, the user picks up the dial 46 by hand and pivots upwardly of the take-out cover 12, and opens the take-up cover in the direction of arrow B in FIG. Rotates together with the take-out lid 12. At this time, the braking sleeve 3 fixed to the take-out lid 12 is brake-rotated around the pivot 5, so that the take-off lid 12 can be stopped at an arbitrary opening angle, and the stored mail can be easily taken out. When the take-off lid is opened 90 degrees, the braking sleeve 3 reaches the position shown in FIG.

  When the mail is stored in each individual receiving box 10, in order to pivot the intake cover 44 upward, a hand is put into the lateral recess 48 and only the intake cover 44 is rotated in the direction of arrow A. When the mail is pushed into the opening 42, the mail passes through a large number of rectangular plates 60 suspended inside the lid while turning backward, and the mail can be stored in the box body 14. The stored mail items are stacked downward in the box body 14, so that it is difficult to take out even if the intake cover 44 at the upper position is opened, and the mail items are shielded by the respective rectangular plates 60. Therefore, if the take-out cover 12 is closed, It is difficult to take it out without permission.

  When the take-out lid 12 is closed to the position shown by the solid line in FIG. 8 after taking out the postal matter, the braking sleeve 3 rotates around the pivot 5 by 90 degrees counterclockwise from the position in FIG. Due to this rotation, the wide grooves 6, 6 of the circular hole 2 of the braking sleeve 3 are fitted with the wide convex portions 7, 7 of the pivot 5, and a click feeling is generated in the take-out lid 12, and the stop is accurately stopped at the vertical position. I do. As a result, the take-off lid 12 is always completely closed and does not open slightly when closed, even when the locking hook is not attached, and the appearance of the collective mail box 8 is also preferable.

DESCRIPTION OF SYMBOLS 1 Small brake hinge 2 Circular hole 3 Braking sleeve 5 Pivot 6, 6 Wide groove 7, 7 Wide convex part 8 Collective mail box 12 Take-out lid 16 Support arm

Claims (3)

An elongated braking sleeve made of wear-resistant plastic having a circular hole, and a metal partial cylindrical pivot pressed into the circular hole of the braking sleeve, and a wide groove formed on an inner peripheral wall of the circular hole of the braking sleeve. Is formed in the axial direction, while the pivot is a partial columnar body provided with a circumferential projection corresponding to the wide groove in the axial direction, and the outer diameter of the pivot is slightly larger than the inner diameter of the circular hole of the braking sleeve, When the pivot is pressed into the braking sleeve, the outer peripheral surface of the circumferential convex portion of the pivot and the inner peripheral surface of the braking sleeve become a friction braking surface, and the rotation of the braking sleeve or pivot causes the outer peripheral surface of the circumferential convex portion of the pivot to have a wide groove. are possible braking rotating in contact with the inner peripheral surface of the sleeve circular hole except, wide groove in the braking sleeve stops occurring can click feeling to match the wide protrusion of the pivot Small braking hinge. An elongated wear sleeve made of a wear-resistant plastic having a circular hole, and a metal cylindrical pivot pressed into the circular hole of the brake sleeve, and a wide groove is formed in an axial direction on an outer peripheral wall of the pivot. On the other hand, a circumferential protrusion corresponding to the wide groove is provided in the brake sleeve in the axial direction, and the outer diameter of the pivot is slightly larger than the inner diameter of the circular hole of the brake sleeve. The outer circumferential surface of the brake sleeve and the circumferential convex portion of the braking sleeve become a friction braking surface, and the rotation of the braking sleeve or pivot causes the outer circumferential surface of the circumferential convex portion of the braking sleeve to come into contact with the inner circumferential surface of the pivot excluding the wide groove for braking rotation. small controlling hinge is possible, the click feeling when the wide groove of said pivot coincides with the circumferential protrusion of the braking sleeve stops occur.   3. An elongated pivot according to claim 1 or 2, wherein the elongated pivot is a partially cylindrical body formed by cutting both side surfaces in parallel to form a flat surface, and a pair of wide grooves or circumferential projections are provided with respect to the sleeve circular hole and the pivot in axial symmetry. Small braking hinge.

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