JP6893024B2 - Lock mechanism - Google Patents

Description

The present invention relates to a locking mechanism, and more particularly to a locking mechanism capable of preventing the locked member from moving in a direction along the axis and rotating around the axis.

In a Western-style toilet (stool type toilet), as shown in Patent Document 1, a toilet unit is attached to the installation portion at the rear of the toilet bowl, and a toilet seat and a toilet lid are attached to the device body so as to be rotatable in the front-rear direction. , The structure is such that the main body of the device, the toilet seat and the toilet lid are integrated.

Further, the toilet seat and the toilet lid of the toilet unit as shown in Patent Document 1 are rotatably attached to the unit body by a hinge mechanism with a rotating damper interposed between the toilet seat and the toilet lid, and are required. Depending on the situation, the toilet seat and toilet lid can be attached and detached from the unit body at the same time or individually. That is, when using the toilet seat, the toilet lid is rotated upward (rear side) to expose the toilet bowl on which the toilet seat is placed so that the toilet seat can be used to sit on the toilet seat. Furthermore, when adding something without sitting on the toilet seat, rotate the toilet seat upward together with the toilet lid, lean both the toilet lid and the toilet seat behind the toilet surface, and place the toilet lid and the toilet seat on the toilet surface. It can be used by removing it from. On the other hand, when the toilet seat and the toilet lid are tilted downward (front side), the toilet seat surface can be covered with the toilet lid to close the toilet seat. When closing the toilet seat and the toilet lid, the toilet seat and the toilet lid can be gently arranged on the surface of the toilet bowl via a rotating damper.

Further, in order to facilitate the work of cleaning and maintenance of such a toilet unit, a structure has been conventionally proposed in which the toilet lid and the toilet seat can be removed from the unit body.

Therefore, a hinge device that is interposed between the unit body and the toilet lid or toilet seat, holds the toilet lid or toilet seat rotatably with respect to the unit body, and has a detachable mechanism that can be removed when necessary has been conventionally used. It is known (for example, Patent Document 2).

In the hinge device described in Patent Document 2, a joint pin is press-fitted into a hole provided in the hinge body, and the hinge body and the joint pin are rotatably connected to each other.

JP-A-2010-203162 WO2013 / 022409A1 Gazette

The hinge device described in Patent Document 2 has a structure in which a joint pin is press-fitted into a hole provided in the hinge body, and the hinge body and the joint pin are rotatably connected to each other. Therefore, there is a problem that the connection between the hinge body and the joint pin becomes loose due to a manufacturing error and the connecting part rotates carelessly, and rattling easily occurs between the hinge body and the joint pin, or the joint. There is a problem that the pin carelessly comes off from the hinge body.

Therefore, when a hinge device as shown in Patent Document 2 is used between the toilet seat and the toilet lid of the toilet unit and the unit body, the toilet seat and the toilet lid may rotate without permission with respect to the unit body. Occurs. In addition, the toilet seat and the toilet lid are slanted or rattled with respect to the unit body, which tends to cause a problem that it is difficult to set the toilet seat and the toilet lid in a predetermined position.

Therefore, there arises a technical problem to be solved in order to provide a locking mechanism in which the locked member can be easily attached / detached and the mounted locked member can be reliably prevented from coming off and rotating. Therefore, the present invention aims to solve this problem.

The present invention has been proposed to achieve the above object, and the invention according to claim 1 is a movement of a locked member extending along a first axis in a direction along the first axis. In the locking mechanism capable of blocking rotation around the first axis, a cylinder having a retaining hole on the side surface through which the locked member penetrates, and one end side is opened and the other end side is closed by an end wall. A second axis that has a shape-like cover and an engaging hole on the side surface to which the locked member can be detachably attached through the retaining hole, and is substantially the center of the cover that intersects the first axis. Provided between the adapter housed in the cover, the end wall in the cover, and the end face of the adapter so as to be movable along the second axis, the adapter is rotatable around the second axis, and the first A stopper that can move integrally with the adapter along the axis 2 and a first cam formed on one surface of the stopper facing the end wall, and the end that is brought into contact with the first cam. It has a second cam formed on the wall, and the stopper and the adapter are moved along the second axis as the stopper rotates around the second axis, so that the outer periphery of the locked member is locked. Provided is a locking mechanism including an axial slide cam means capable of pressing a surface against an inner peripheral surface of the retaining hole.

According to this configuration, when the stopper is rotated around the second axis in the locking direction from the state where the stopper is in the unlocked position, the first cam of the axial slide cam means provided on one surface of the stopper becomes the stopper. Rotates integrally with. At this time, the cam surface of the first cam in the axial slide cam means and the cam surface of the second cam formed on the end wall of the cover cooperate to move both the stopper and the adapter in the lock position direction. There is. Then, in conjunction with the movement, the outer peripheral surface of the locked member inserted into the engaging hole of the adapter is pressed against the inner peripheral surface of the retaining hole provided in the cover, and the locked state is switched to the locked state. In the locked state, the frictional force generated between the outer peripheral surface of the locked member and the inner peripheral surface of the retaining hole causes the locked member to move in the direction along the first axis and fall out of the engaging hole of the adapter. Rotates between the locked member and the cover (the locked member rotates around the first axis with respect to the cover, or the cover rotates around the first axis with respect to the locked member). Prevent it from spinning). That is, the lock function works.

Further, when the stopper is rotated around the second axis in the unlocking direction from the locked state, the cam surface of the first cam and the cam surface of the second cam in the axial slide cam means cooperate with the stopper. Allows both adapters to move towards the unlock position. As a result, the force pressing the locked member against the inner peripheral surface of the retaining hole provided on the cover is weakened, and the frictional force between the outer peripheral surface of the locked member and the inner peripheral surface of the retaining hole is reduced. Reduce. Then, the locked member is moved in the direction along the first axis, the locked member is pulled out from the engaging hole of the adapter and removed from the cover, or the removed locked member is inserted into the engaging hole of the adapter again. (The attachment / detachment mechanism works) and the rotation between the locked member and the cover can be allowed (the hinge mechanism function works).

Therefore, when the stopper is rotated via the lock operation unit, the cam of the axial slide cam means moves the stopper together with the adapter along the second axis according to the rotation direction of the stopper, and the locked member. Since it is possible to attach / detach the lock member and lock / unlock the rotation between the locked member and the cover, the lock / unlock operation of the locked member / detachment operation and the rotation between the locked member and the cover are possible. Can be locked and unlocked easily and reliably.

The invention according to claim 2 is interposed between the adapter and the stopper in the configuration according to claim 1, and is compressed by the movement of the stopper along the second axis of the adapter and the stopper. Provided is a locking mechanism provided with elastic members for applying spring forces in opposite directions to each of the above.

According to this configuration, the adapter and the stopper are integrated in the second axial direction via an elastic member. Then, the movement of the stopper controlled by the axial slide cam means and moving in the direction along the second axis is flexibly and surely transmitted to the adapter through the spring force of the elastic member, and the locked member is the adapter. The force that is pushed against the inner surface of the retaining hole of the cover is also flexibly and surely applied. As a result, rattling between the adapter and the stopper and rattling between the outer peripheral surface of the locked member and the inner peripheral surface of the retaining hole in the cover can be reliably suppressed.

The invention according to claim 3 provides a locking mechanism in which the elastic member is a spring washer in the configuration according to claim 2.

According to this configuration, by using the spring washer, the elastic member can be easily attached at the time of assembly, and the assembly work can be simplified.

In the invention according to claim 4, in the configuration according to claim 1, 2 or 3, a groove is provided on the outer peripheral surface of the locked member, and the stopper is provided with a lock member that can be inserted into and engaged with the groove. , Provides a locking mechanism.

According to this configuration, the lock member moved to the lock position side together with the stopper is inserted into the groove provided on the outer peripheral surface of the locked member. Then, when the locked member is about to be moved in the direction along the first axis, the locked member is engaged with the groove surface of the groove portion. As a result, the frictional force between the outer peripheral surface of the locked member and the inner peripheral surface of the retaining hole in the cover is relaxed to allow rotation between the locked member and the cover, and the locked member and the cover are allowed to rotate. Even if a hinge function is provided between the and, it is possible to prevent the locked member from falling out of the engagement hole of the adapter.

In the invention according to claim 5, in the configuration according to claim 4, the shape of the tip portion of the lock member is formed as a protrusion having a substantially conical cross section, and the groove portion of the locked member is the lock. Provided is a locking mechanism formed as a groove having a substantially V-shaped cross section corresponding to the shape of the tip portion of the member.

According to this configuration, when the lock member is moved toward the lock position side, the tip end portion of the lock member is gradually inserted from the front side of the lock position along the groove portion, and the height in the direction along the first axis line. The tip of the lock member is engaged in the groove while automatically adjusting the position. Further, at the end of the lock position, the tip end portion of the lock member is brought into contact with the groove side surface of the groove portion and / or the side surface of the locked member to generate a frictional force between the locked member and the locked member. Two movement restraints, rotation of the lock member and movement in the direction along the axis, can be performed simultaneously and reliably.

The invention according to claim 6 relates to at least one of the first cam and the second cam in the axial slide cam means in the configuration according to claim 1, 2, 3, 4 or 5. Provided is a locking mechanism in which the end of the cam surface is formed by a flat surface.

According to this configuration, even if the stopper is further rotated while the lock member has reached a predetermined position such as the end of the lock position, the cam end is formed in a flat surface, so that the lock member moves toward the lock position. I can't move any further. Therefore, the pressure contact force between the lock member and the locked member and the pressure contact force between the outer peripheral surface of the locked member and the inner peripheral surface of the retaining hole of the cover are held in the final position. Can be left. As a result, the final holding state is stabilized, and it is possible to prevent an excessive force from being applied to the lock member, the locked member, the retaining hole of the cover, and the like.

The invention according to claim 7 rotates together with the stopper according to a rotational force applied to the stopper from the outside of the cover in the configuration according to claim 1, 2, 3, 4, 5 or 6. Provided is a lock mechanism provided with a lock operation unit.

According to this configuration, the lock operation unit can be operated from the outside of the cover and the stopper can be rotated around the second axis to easily perform the lock operation.

The invention according to claim 8 is an operation in which a jig is inserted into an end surface of a lock operation portion to operate the rotation of the stopper in the configuration according to claim 1, 2, 3, 4, 5, 6 or 7. Provided is a locking mechanism provided with a groove.

According to this configuration, the stopper can be easily rotated by inserting a jig from the outside of the cover into the operation groove provided on the end face of the stopper and rotating the stopper. Then, the stopper can be moved along the axis X together with the adapter by the cam action of the axial slide cam means.

According to the present invention, when the stopper is rotated via the lock operation portion, the cam of the axial slide cam means moves the stopper together with the adapter along the axis X in the rotation direction of the stopper, and the locked member It can be locked and unlocked alternately. Therefore, a locking mechanism can be obtained in which the locked member can be easily attached and detached, and the locked member can be reliably locked from being inadvertently dropped out (fallen off) after mounting.

A hinge device including a lock mechanism and a detachable mechanism according to the present invention is shown, (a) is a plan view of the hinge device, and (b) is a side view of the hinge device. It is a top view of the above-mentioned hinge device which shows the locking mechanism in an unlocked state by breaking a part. The locking mechanism is in the locked state, (a) is a plan view of the same hinge device shown by breaking a part thereof, and (b) is a side view thereof. It is an exploded perspective view of the hinge device of the same as above. It is a top view of the hinge shaft in the hinge device of the same as above. It is a front view of the cover in the hinge device of the same as above. FIG. 6 is a cross-sectional view taken along the line AA of FIG. It is a perspective view which shows the structure of the main part inside the cover in the hinge device as above. It is an external perspective view of the stopper in the same-mentioned hinge device. It is a top view of the stopper shown in FIG. FIG. 10 is a cross-sectional view taken along the line BB of FIG. It is a perspective view of the elastic member in the hinge device of the same as above. It is a top view of the same elastic member shown in FIG. FIG. 3 is a sectional view taken along the line CC of FIG. It is the external perspective view of the adapter in the hinge device of the same as above.

The first object of the present invention is to provide a locking mechanism in which the locked member can be easily attached and detached, and the mounted locked member can be reliably prevented from coming off and rotating. In a locking mechanism capable of preventing the locked member extending along the axis from moving in the direction along the first axis and rotating around the first axis, a retaining hole through which the locked member penetrates on a side surface thereof. And has a tubular cover with one end open and the other end closed with an end wall, and an engaging hole on the side surface to which the locked member can be detachably attached through the retaining hole. An adapter housed in the cover, an end wall in the cover, and an end face of the adapter so as to be movable along a second axis that is substantially the center of the cover that intersects the first axis. A stopper provided between the two, which can rotate around the second axis and can move integrally with the adapter along the second axis, and one surface of the stopper facing the end wall. It has a first cam formed in the above and a second cam formed on the end wall in contact with the first cam, and the stopper is rotated with the rotation of the stopper around the second axis. And the adapter are moved along the second axis, and the outer peripheral surface of the locked member is provided with an axial slide cam means capable of pressing the outer peripheral surface of the locked member against the inner peripheral surface of the retaining hole. did.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same elements are designated by the same reference numerals throughout the description of the embodiment. Further, in the following description, the expressions indicating the directions such as up and down and left and right are not absolute, and are appropriate when each part of the hinge device of the present invention is drawn, but the posture is appropriate. If it changes, it should be changed and interpreted according to the change in posture.

1 to 4 show an embodiment of a hinge device provided with a lock mechanism and a detachable mechanism according to the present invention. In FIGS. 1 to 4, the hinge device 10 has a structure suitable for a toilet unit (not shown). However, the hinge device 10 of the present invention is not limited to the toilet unit, and can be used as a general hinge device.

The hinge device 10 includes a hinge shaft 11 as a locked member and a hinge body 12 capable of locking (constraining) the movement of the hinge shaft 11 (movement along the axis Y, rotation about the axis Y, etc.). Be prepared. Between the hinge shaft 11 and the hinge body 12, the hinge shaft 11 is locked (restrained) or unlocked (unconstrained) with respect to the hinge body 12, and the hinge shaft 11 is attached to and detached from the hinge body 12. The function of holding the hinge shaft 11 and the hinge body 12 so as to be rotatably connected to each other, and the hinge shaft 11 attached to the hinge body 12 so that the hinge shaft 11 and the hinge body 12 can be held together. Each has a function of connecting and fixing the space so as not to rotate. Then, which function is selected is left to the purpose of use of the user.

In this embodiment, the hinge shaft 11 is fixedly attached to the unit body of the toilet unit via, for example, a mounting pin 13, and the hinge body 12 is attached to one end side of a toilet seat or a toilet lid (not shown) via a rotary damper 14. It can be fixed and attached. In this way, the toilet unit using the hinge device 10 has the toilet seat or the toilet lid attached via the rotary damper 14, so that the toilet seat or the toilet lid is rotated backward and leaned toward the front. When the toilet seat or the toilet lid is rotated to the side and lowered onto the toilet surface, the toilet seat or the toilet lid is gently rotated toward the front by the buffering action of the rotating damper 14, so that the toilet seat or the toilet lid can be quietly placed on the toilet surface.

The hinge shaft 11 is a metal shaft-shaped member in which a small diameter portion 11A and a large diameter portion 11B are sequentially provided along an axis Y as a first axis. On the lower surface of the large diameter portion 11B of the hinge shaft 11, a mounting hole 22 formed on the inner peripheral surface of a female screw to be mounted by screwing one end (male screw) of the mounting pin 13 is provided along the axis Y. ing. Further, an annular groove portion 23 is provided on the outer peripheral surface of the small diameter portion 11A of the hinge shaft 11. As is clear from the enlarged view of the hinge shaft 11 shown in FIG. 5, the annular groove portion 23 is continuously formed in an annular shape as a groove having a V-shaped cross section in which both side surfaces of the groove are inclined inward from the outer peripheral side. It is formed around. Reference numeral 30 in the drawing is a spacer.

The hinge main body 12 includes a cover 15, a stopper 16 which is sequentially housed and arranged in the cover 15 along an axis X as a second axis, and a spring washer (spring washer) 17 as an elastic member. , Has an adapter 18. Further, the inner surface of the rear end portion of the cover 15 and the stopper 16 are provided with the first cam 19A and the second cam 19B constituting the axial slide cam means 19 facing each other. Further, the stopper 16 is provided with a lock pin 20 as a lock member and an operation groove 21 as a lock operation unit.

The cover 15 is a resin tubular body with one end open. 6 to 8 are enlarged views showing the internal structure of the cover 15, FIG. 6 is a front view of the cover 15, FIG. 7 is a sectional view taken along the line AA of FIG. 6, and FIG. It is a perspective view which shows.

As is clear from the drawings of FIGS. 6 to 8, the end wall 15A of the cover 15 is provided with a circular through hole 24 at the center. Further, on the inner surface of the end wall 15A, a pair of second cams 19B in the axial slide cam means 19 are provided at intervals of 180 ° so as to surround the outside of the through hole 24. The cam surface 19B1 of each second cam 19B faces the open one end side of the cover 15, and the cam surface 19B1 faces from one end side to the other end side, that is, in the counterclockwise direction in FIGS. 6 and 8. It is formed as an inclined surface 19b in which the height from the end wall 15A gradually increases. Further, a retaining hole 27 is formed on the side surface of the cover 15 so as to penetrate the hinge shaft 11 and attach the cover 15. The inner diameter of the retaining hole 27 is formed to be slightly larger than the outer diameter of the large diameter portion 11B of the hinge shaft 11, and is formed with a play in the axis X direction between the retaining hole 27 and the large diameter portion 11B of the hinge shaft 11. There is.

The stopper 16 is a metal member having a top shape. 9 to 11 are enlarged views showing the stopper, FIG. 9 is a perspective view of the stopper 16, FIG. 10 is a side view of the stopper 16 as viewed from the rear side, and FIG. 11 is a sectional view taken along line BB of FIG. Is.

As is clear from the drawings of FIGS. 9 to 11, the stopper 16 is the large-diameter shaft portion 16b provided on one surface side of the disk portion 16a (the surface side facing the end wall 15A of the cover 15) and vice versa. The small-diameter shaft portion 16c provided on the other surface side and the lock pin 20 are integrally provided. The disk portion 16a, the large-diameter shaft portion 16b, the small-diameter shaft portion 16c, and the lock pin 20 are all formed so that their centers are substantially aligned with the axis X.

Further, the outer diameter of the disk portion 16a of the stopper 16 is formed to be the same as or slightly smaller than the inner diameter of the cover 15, and the stopper 16 can be moved along the axis X in the cover 15.

The outer diameter of the large-diameter shaft portion 16b is substantially equal to the inner diameter of the through hole 24 provided in the end wall 15A of the cover 15, and the axial length is one even when the axial slide cam means 19 described later is operating. The portion has a size that always stays in the through hole 24. Further, the operation groove 21 as a lock operation portion is provided on the end surface of the large diameter shaft portion 16b, that is, the end surface exposed to the outside of the cover 15 through the through hole 24. A jig such as a coin or the tip of a flat-blade screwdriver can be inserted into the operation groove 21 from the outside of the cover 15. Then, the stopper 16 can be rotated around the axis X by the inserted coin or a flat-blade screwdriver.

The small diameter shaft portion 16c is formed so that the outer diameter is substantially equal to the inner diameter of the spring washer 17, and as shown in FIG. 11 as the BB cross section of FIG. 10, the outer peripheral surface of the spring washer 17 is formed. A locking portion 16d is provided to engage the cutting portion 17a to stop the rotation.

The spring washer 17 is a metal member. 12 to 14 are enlarged views showing the spring washer 17, FIG. 12 is a perspective view thereof, FIG. 13 is a plan view thereof, and FIG. 14 is a sectional view taken along the line CC of FIG.

As is clear from the drawings of FIGS. 12 to 14, the spring washer 17 attached to the small diameter shaft portion 16c of the stopper 16 is a part of a ring-shaped washer (hereinafter, this is referred to as a “cut portion 17a”). It is shaped like a part cut off. The spring washer 17 itself uses a well-known general-purpose one.

Further, as is clear from FIGS. 9 to 11, the axial slide cam means 19 is provided so as to surround the outside of the large-diameter shaft portion 16b on one surface of the disc portion 16a facing the end wall 15A of the cover 15 of the stopper 16. A pair of first cams 19A are provided at 180 ° intervals. The cam surface 19A1 of each first cam 19A faces the end wall 15A of the cover 15, and the cam surface 19A1 gradually increases in height from one end side to the other end side, that is, in the counterclockwise direction. It is formed as an enlarged inclined surface 19a1. A part of the cam surface 19A1 on the terminal side is formed as a plane 19a2 having the same height in the rotation direction. Then, in the cover 15, the cam surface 19A1 of the first cam 19A and the cam surface 19B1 of the second cam 19B of the axial slide cam means 19 are always in contact with each other under the spring force of the spring washer 17. It is held in the state.

The lock pin 20 is a pin protruding from the end surface of the small-diameter shaft portion 16c along the axis X, and the shape of the tip portion is formed to have a substantially conical cross section. The protruding shape of this cone substantially corresponds to the V-shaped cross section of the groove 23 of the hinge shaft 11. Then, when the tip of the lock pin 20 is inserted into the groove 23, the tip side of the lock pin 20 is brought into contact with the side wall and the bottom of the groove 23 in the groove 23, respectively, and between the groove 23 and the lock pin 20. The frictional force acting on the hinge shaft 11 can lock (restrain) the rotation of the hinge shaft 11 with respect to the lock pin 20. Further, when the tip of the lock pin 20 is inserted into the groove 23, when the hinge shaft 11 is moved in the attachment / detachment direction along the axis Y, the tip of the groove 23 and the lock pin 20 are engaged with each other. , The hinge shaft 11 can be blocked (locked) from moving in the attachment / detachment direction.

The adapter 18 is a resin-made shaft-shaped member. FIG. 15 is an enlarged perspective view of the adapter 18.

As is clear from the views shown in FIGS. 2 to 4, the adapter 18 is formed so that the outer diameter of the adapter 18 is substantially equal to the inner diameter of the cover 15. On the outer peripheral surface of the adapter 18, an engaging hole 26 capable of accepting a part of the small diameter portion 11A and the large diameter portion 11B of the hinge shaft 11 is provided in the adapter 18 at a position corresponding to the retaining hole 27 of the cover 15. It is provided toward. In the engaging hole 26, as shown in FIGS. 2 and 3A, the hinge shaft 11 has a substantially center (V-shaped groove bottom) in the vertical direction of the groove portion 23 of the hinge shaft 11. It can be inserted up to a position that substantially coincides with the axis X.

Further, on one end side of the adapter 18, a mounting hole 28 into which one end (D-cut surface) of the rotary damper 14 is inserted is provided along the axis X. On the other hand, on the other end side of the adapter 18, an insertion hole 29 into which the small diameter shaft portion 16c of the stopper 16 and the lock pin 20 are inserted is provided along the axis X. A part of the center of the insertion hole 29 (hereinafter, referred to as "center hole 29a") penetrates into the engagement hole 26, and the lock pin 20 passes through the center hole 29a to enter the engagement hole. It is possible to project into 26. Further, as shown in FIG. 15, when the stopper 16 rotates by a predetermined amount on the inner peripheral surface of the insertion hole 29, the locking portion 16d of the stopper 16 shown in FIG. 11 collides with the inner peripheral surface of the insertion hole 29 to restrict further rotation. The rotation restricting wall 29b is formed.

Next, an example of the assembly procedure of the hinge device 10 configured in this way will be described.

(1) First, a stopper 16 having a spring washer 17 attached to the small diameter shaft portion 16c is prepared.

(2) Next, the stopper 16 is inserted into the cover 15 through one end opening of the cover 15 with the large-diameter shaft portion 16b of the stopper 16 in front. At this time, as shown in FIG. 1B, the stopper 16 is inserted in a state where the stopper 16 is rotated to the unlocked position. When the stopper 16 is inserted to the final position, the cam surface 19A1 of the first cam 19A and the cam surface 19B1 of the second cam 19B in the axial slide cam means 19 come into contact with each other. That is, the end wall 15A of the cover 15 and the disk portion 16a of the stopper 16 are in contact with each other, and the tip end side of the large diameter shaft portion 16b is inserted and arranged in the through hole 24 of the cover 15. As shown in FIG. 2, the stopper 16 in this state is arranged at the unlocked position most moved to the end wall 15A side of the cover 15 by the cam action of the axial slide cam means 19.

(3) Next, the adapter 18 is inserted into the cover 15 through the opening at one end of the cover 15 with one end side of the adapter 18 provided with the mounting hole 28 facing back. Then, the other end of the adapter 18 comes into contact with the spring washer 17, and the engagement hole 26 of the adapter 18 substantially corresponds to the retaining hole 27 of the cover 15. In this state, the spring of the spring washer 17 is fully extended, and the adapter 18 is pushed by the spring washer 17, and the position in the cover 15 is slightly shifted to the opening side at one end of the cover 15 to prevent the cover 15 from coming off. The center of the hole 27 (axis Y) and the center of the engagement hole 26 of the adapter 18 do not coincide with each other.

(4) Next, the hinge shaft 11 is attached to the adapter 18. To attach the hinge shaft 11, first, the adapter 18 is slightly pushed inside the cover 15, and the spring washer 17 is sandwiched between the adapter 18 and the stopper 16 to compress the spring of the spring washer 17. By this compression, the spring force of the spring washer 17 is applied to the adapter 18 and the stopper 16 as the spring force in opposite directions, respectively, and the cam surface 19A1 and the second cam 19B of the first cam 19A in the axial slide cam means 19 The cam surface 19B1 is always in close contact with the cam surface 19B1. Then, by this compression, the center of the retaining hole 27 of the cover 15 and the center of the engaging hole 26 of the adapter 18 are substantially aligned with the axis Y, respectively.

(5) Further, with the retaining hole 27 and the engaging hole 26 aligned with each other, the hinge shaft 11 is passed through the through hole 24 in the engaging hole 26 to the final position, that is, the groove bottom of the groove portion 23 is the axis X. Insert until it corresponds to. Then, after the insertion, the force pushing the adapter 18 inside the cover 15 (on the end wall 15A side) is released. Then, the spring force of the compressed spring washer 17 is released, the adapter 18 is pushed together with the hinge shaft 11 to one end opening side of the cover 15, and the outer peripheral surface of the hinge shaft 11 becomes the inner peripheral surface of the retaining hole 27. It is pressed loosely. This state is the unlocked state shown in FIGS. 1 and 2. In this unlocked state, the contact between the outer peripheral surface of the hinge shaft 11 and the inner peripheral surface of the retaining hole 27 is very weak, and the frictional force generated between them is also very small. Therefore, in this state, the hinge shaft 11 can be freely attached to and detached from the engaging hole 26 of the adapter 18. Further, the outer peripheral surface of the hinge shaft 11 and the cover 15 are in a state where they can freely rotate with each other.

After that, if necessary, one end (D-cut surface) of the rotary damper 14 is inserted into the mounting hole 28 of the adapter 18, the rotary damper 14 is mounted on the adapter 18, and the mounting hole (female screw) 22 of the hinge shaft 11 is attached. One end (male screw) of the mounting pin 13 is screwed into the hinge shaft 11, and the mounting pin 13 is attached to the hinge shaft 11 to complete the assembly. FIGS. 1, 2 and 3 show the state after this assembly.

Next, the operation of the hinge device 10 according to the present invention will be described. The hinge device 10 unlocks and attaches / detaches the hinge shaft 11 to / from the hinge body 12 by rotating the stopper 16 (an operation in which the hinge shaft 11 moves along the axis Y). It is possible to switch between a lock that blocks and an unlock that allows rotation between the hinge shaft 11 and the cover 15 on the hinge body 12 side, and a lock that restrains the hinge so that it does not rotate. As described above, the stopper 16 can be rotated clockwise or counterclockwise by inserting a jig such as a coin or the tip of a flat-blade screwdriver into the operation groove 21 of the stopper 16 from the outside of the cover 15. By rotating, both the stopper 16 and the adapter 18 can be selectively moved to the locked position or the unlocked position.

(A state in which the hinge shaft 11 and the hinge body 12 can be attached and detached, and the hinge shaft 11 and the hinge body 12 can be rotated):
1 and 2 show a state in which the stopper 16 is rotated to the unlocked position and the stopper 16 is moved to the unlocked position together with the adapter 18. In this state, as shown in FIG. 2, the stopper 16 is arranged at the unlocked position most moved to the end wall 15A side of the cover 15 by the cam action of the axial slide cam means 19 and the reaction force of the spring washer 17. ing. Then, the lock pin 20 comes out of the groove 23 of the hinge shaft 11 and is retracted into the central hole 29a. Further, the lock pin 20 and the hinge shaft 11 are in an unlocked state in which they are disengaged. Therefore, when the adapter 18 is slightly pushed into the cover 15 and the center of the retaining hole 27 of the cover 15 and the center of the engaging hole 26 of the adapter 18 are substantially aligned with the axis Y, the outer peripheral surface of the hinge shaft 11 and the cover 15 are aligned. The frictional force between the retaining hole 27 and the inner surface of the retaining hole 27 is eliminated, and the hinge shaft 11 can be freely moved in and out of the engaging hole 26. That is, the hinge shaft 11 can move freely with respect to the hinge body 12 in the axis Y direction, and the hinge shaft 11 can be attached and detached. Further, the rotation between the hinge body 12 (cover 15) and the hinge shaft 11 is also free.

(A state in which the hinge shaft 11 and the hinge body 12 cannot be attached or detached, and the hinge shaft 11 and the hinge body 12 can rotate):
Next, with the hinge shaft 11 inserted into the engagement hole 26 of the adapter 18, the stopper 16 is rotated in the clockwise direction (lock position direction). Then, in the axial slide cam means 19, the cam surface 19A1 of the first cam 19A and the cam surface 19B1 of the second cam 19B rotate while rubbing against each other, and the cam action of the cam surface 19A1 and the cam surface 19B1 causes the stopper 16 to rotate. And the adapter 18 are both moved away from the end wall 15A of the cover 15 and closer to the hinge shaft 11, that is, toward the lock position side.

Then, when the lock pin 20 is moved to the lock position side until it protrudes from the center hole 29a side into the engagement hole 26, the tip of the lock pin 20 is inserted into the groove portion 23 of the hinge shaft 11. .. In this state, even if the hinge shaft 11 is to be pulled out in the axis Y direction, the groove portion 23 and the lock pin 20 are engaged with each other and cannot be pulled out. That is, the hinge shaft 11 is locked in the engaging hole 26 of the adapter 18 to prevent it from coming off. Further, when the stopper 16 is not arranged at the final lock position, the outer peripheral surface of the hinge shaft 11 remains loosely in contact with the inner peripheral surface of the retaining hole 27 of the cover 15, and the hinge shaft 11 and the cover 15 remain in contact with each other. Can rotate with each other. Therefore, although the hinge shaft 11 cannot be attached or detached, the hinge body 12 (cover 15) and the hinge shaft 11 can be freely rotated.

(A state in which the hinge shaft 11 and the hinge body 12 cannot be attached or detached, and the hinge shaft 11 and the hinge body 12 cannot rotate):
Further, when the stopper 16 is further rotated clockwise to the final lock position, the stopper 16 and the adapter 18 are further moved to the lock position side. Then, the tip of the lock pin 20 moving integrally with the stopper 16 protrudes into the engagement hole 26, and the conical tip outer peripheral surface of the lock pin 20 is strongly abutted and engaged with the groove surface in the groove portion 23. To. At the same time, the outer peripheral surface of the hinge shaft 11 is brought into contact with the inner peripheral surface of the retaining hole 27 in the cover 15. Then, due to the frictional force generated between the lock pin 20 and the groove surface of the groove portion 23 and the frictional force generated between the outer peripheral surface of the hinge shaft 11 and the inner peripheral surface of the retaining hole 27, The rotation of the hinge body 12 with respect to the hinge shaft 11 is locked (restrained). Therefore, the hinge shaft 11 cannot be attached or detached, and the rotation between the hinge body 12 (cover 15) and the hinge shaft 11 is also impossible.

The frictional force generated between the lock pin 20 and the groove surface of the groove portion 23 and the frictional force generated between the outer peripheral surface of the hinge shaft 11 and the inner peripheral surface of the retaining hole 27 are as follows. Assuming that the outer diameter of the spring washer 17 is 11.8 mm, the inner diameter is 6.4 mm, and the thickness is 1.6 mm, the repulsive force of the spring washer 17 is about 243 N, and a rotational torque of about 0.4 to 0.5 N is obtained. Be done. Further, this torque fluctuates depending on the coefficient of friction between the members.

Further, even if the stopper 16 is further rotated in the clockwise direction (lock position direction) while the stopper 16 is rotated to the final position, the end side of the cam surface 19A1 of the first cam 19A in the axial slide cam means 19 Since a part of the cam 19A2 is formed as a flat surface 19a2, the first cam 19A stays at that position and does not advance further toward the hinge shaft 11. Therefore, when the stopper 16 is rotated to a position where the flat surface 19a2 corresponds to the cam surface 19B1 of the second cam 19B, the hinge shaft 11 can always be locked with the same frictional force at the final position. When the stopper is rotated to the final position, the locking portion 16d of the stopper 16 shown in FIG. 11 collides with the rotation restricting wall 29b of the adapter 18 shown in FIG. 15, and further rotation is restricted.

Further, when the hinge shaft 11 and the hinge body 12 can be rotated while holding the lock in the direction along the axis Y of the hinge shaft 11, the stopper 16 is moved in the counterclockwise direction (un) from the lock position. Rotate slightly in the lock position direction) to move the stopper 16 and the adapter 18 in the unlock position direction (end wall 15A side) within the range where the engagement between the lock pin 20 and the groove 23 of the hinge shaft 11 cannot be disengaged. When the frictional force between the lock pin 20 and the hinge shaft 11 and the frictional force between the outer peripheral surface of the hinge shaft 11 and the inner peripheral surface of the retaining hole 27 in the cover 15 are removed or weakened, the hinge is hinged. In a state where the retaining lock between the shaft 11 and the hinge main body 12 is locked, the hinge main body 12 and the hinge shaft 11 can be rotated so as to function as a hinge.

That is, in the hinge device 10 configured in this way, when a jig is inserted into the operation groove 21 which is the lock operation portion from the outside of the cover 15 and the stopper 16 is rotated about the axis X, the axial slide cam means 19 The cam surface 19A1 of the first cam 19A and the cam surface 19B1 of the second cam 19B cooperate with each other to move the stopper 16 together with the adapter 18 and the lock pin 20 in the lock position direction according to the rotation direction of the stopper 16. Alternatively, the hinge shaft 11 can be locked and unlocked by moving it in the unlock position direction. Therefore, the hinge shaft 11 can be easily attached to and detached from the hinge main body 12, and the hinge shaft 11 after mounting is provided with a lock mechanism and a lock mechanism thereof that can surely prevent the hinge shaft 11 from moving (falling off) in the axis Y direction. An attachment / detachment mechanism and a hinge device provided with the attachment / detachment mechanism can be obtained.

Further, since the spring washer 17 is used as the elastic member, the elastic member can be easily incorporated into the stopper 16.

Further, the hinge shaft 11 which is a locked member is provided with a groove portion 23 as an engaging recess corresponding to the lock pin 20 as a lock member, and the tip portion of the lock pin 20 is inserted into the groove portion 23 for abutting engagement. Therefore, it is possible to restrain the rotation of the hinge shaft 11 and prevent it from coming off at the same time. Further, since the shape of the groove 23 of the hinge shaft 11 is formed as a groove having a substantially V-shaped cross section corresponding to the conical shape of the tip of the lock pin 20, the tip of the lock pin 20 is formed at the end of the lock position. And the groove 23 of the hinge shaft 11 are in close contact with each other, and the hinge shaft 11 can be reliably restrained (prevented from coming off and stopped from rotating). When the lock by the lock pin 20 is formed so that the conical peripheral surface of the lock pin 20 is in close contact with the side surface of the groove portion 23, the tip of the lock pin 20 bites into the peripheral surface of the hinge shaft 11. It does not have to be in direct contact with each other.

Further, since the cam end on the cam surface 19A1 of the first cam 19A in the axial slide cam means 19 is formed by the plane 19a2, the lock pin 20 reaches a predetermined position such as the end of the lock position. Even if the cam 19A of No. 1 is further rotated, the lock pin 20 does not move any further in the lock position direction because the cam end side is formed by the plane 19a2. Then, since the pressure contact force between the lock pin 20 and the hinge shaft 11 can be held at that position, it is possible to prevent the generation of an unreasonable pressure contact force.

Further, an operation groove 21 as a lock operation portion is provided on the end surface of the stopper 16 on the opposite side to the lock pin 20, and a jig such as a flat-blade screwdriver tip or a coin is inserted into the operation groove 21 from the outside of the cover 15. Since the rotation of the stopper 16 is operated, the rotation operation of the stopper 16 can be easily performed.

It should be noted that the present invention can be modified in various ways as long as it does not deviate from the spirit of the present invention, and it is natural that the present invention extends to the modified ones.

10 Hinge device 11 Hinge shaft 11A Small diameter part 11B Large diameter part 12 Hinge body 13 Mounting pin 14 Rotating damper 15 Cover 15A End wall 16 Stopper 16a Disc part 16b Large diameter shaft part 16c Small diameter shaft part 16d Locking part 17 Spring washer 17a Cutting part 18 Adapter 19 Axle slide cam means 19A First cam 19A1 Cam surface 19a1 Inclined surface 19a2 Flat surface 19B Second cam 19B1 Cam surface 19b Inclined surface 20 Lock pin (lock member)
21 Operation groove (lock operation unit)
22 Mounting hole 23 Groove 24 Through hole 26 Engagement hole 27 Retaining hole 28 Mounting hole 29 Insertion hole 29a Center hole 29b Rotation regulation wall 30 Spacer X axis (second axis)
Y axis (first axis)

Claims (8)

In a locking mechanism capable of preventing the locked member extending along the first axis from moving in the direction along the first axis and rotating around the first axis.
A tubular cover having a retaining hole on the side surface through which the locked member penetrates, and one end side is opened and the other end side is closed by an end wall.
The locked member has an engaging hole on the side surface to which the locked member can be detachably attached through the retaining hole, and can move along a second axis that intersects the first axis and is substantially the center of the cover. With the adapter stored in the cover,
A stopper provided between the end wall and the end face of the adapter in the cover, which can rotate around the second axis and can move integrally with the adapter along the second axis.
The stopper has a first cam formed on one surface of the stopper facing the end wall and a second cam formed on the end wall in contact with the first cam. An axial slide cam capable of moving the stopper and the adapter along the second axis along the rotation around the second axis and pressing the outer peripheral surface of the locked member against the inner peripheral surface of the retaining hole. Means and
A lock mechanism characterized by being provided with. An elastic member is provided between the adapter and the stopper, which is compressed by the movement of the stopper along the second axis and applies spring force in opposite directions to the adapter and the stopper. The locking mechanism according to claim 1. The locking mechanism according to claim 2, wherein the elastic member is a spring washer sandwiched between the adapter and the stopper. The locking mechanism according to claim 1, 2 or 3, wherein a groove is provided on the outer peripheral surface of the locked member, and the stopper is provided with a locking member that can be inserted into and engaged with the groove. The shape of the tip of the lock member is formed as a protrusion having a substantially conical cross section, and the groove of the locked member is formed as a groove having a substantially V-shaped cross section corresponding to the shape of the tip of the lock member. The locking mechanism according to claim 4, wherein the locking mechanism is provided. Claims 1, 2, 3, 4 characterized in that the end of the cam surface of at least one of the first cam and the second cam in the axial slide cam means is formed by a flat surface. Or the locking mechanism according to 5. The first, second, third, fourth, fifth or sixth aspect of the present invention, wherein the stopper is provided with a lock operation portion that rotates together with the stopper according to a rotational force applied from the outside of the cover. Lock mechanism. The lock mechanism according to claim 7, wherein an operation groove for inserting a jig to operate the rotation of the stopper is provided on the end surface of the lock operation portion.

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