JP2013230765A - Locking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking device that can reliably mesh a striker and a hook lever and can be reduced in size.SOLUTION: A locking device includes: a locking mechanism accommodation member (a body 2 and a base plate 3) having a striker approach groove 201; a hook lever shaft 7 disposed on the locking mechanism accommodation member; and a hook lever 4 rotatably arranged in the locking mechanism accommodation member via the hook lever shaft 7 and meshing with a striker S that advances into the striker approach groove 201; wherein the locking device is rotatably supported by a support member (a frame 9). The hook lever shaft 7 is rotatably disposed on the locking mechanism accommodation member; the locking mechanism accommodation member is rotatably supported by the support member while an opening position of the striker approach groove 201 is varied via the hook lever shaft 7; and a rotation regulating means (a rotation regulating part 209 and a rotation regulating projection 94) is disposed to regulate rotation of the locking mechanism accommodation member within the range of an allowable meshing margin that allows meshing of the striker S and the hook lever 4.

Description

  The present invention relates to a lock device for fixing a detachable seat, a movable seat or the like to a vehicle body.

  Some vehicles such as one-box cars and buses are provided with a detachable seat and a movable seat (hereinafter collectively referred to as a “detachable seat”). The detachable seat is fixed to the vehicle body by restraining a striker provided on either the detachable seat or the vehicle body by a lock device provided on either the detachable seat or the vehicle body. .

  The lock device includes a lock mechanism including a hook lever and an open lever, and a lock mechanism housing member that houses the lock mechanism. The lock mechanism housing member includes a body and a base plate, and a striker entry groove for allowing the striker to enter is formed in these members. The lock mechanism is configured to mesh the striker that has entered the striker entry groove with the hook lever, and to restrain the striker with the body and the hook lever.

  In this type of locking device, the lock mechanism housing member is often fastened and fixed to a support member (for example, a frame of a detachable seat) with a support bolt. However, when the lock mechanism housing member is fixed to the support member, if there is a shift in the relative position between the lock mechanism housing member and the striker, the striker and the hook lever do not mesh, and the removable seat may not be fixed to the vehicle body. There is. As one of the methods for preventing such a situation, there is a method of eliminating the shift of the relative position with respect to the striker by rotating a lock device (lock mechanism housing member) with respect to the support member.

  As a method of rotating the lock device with respect to the support member, there is a method of extending an attachment portion in which a round hole and a long hole are formed outside the lock mechanism housing member (see, for example, Patent Document 1). . In this method, the lock device is rotatably supported by the support member by the support bolt (stepped bolt) inserted through the round hole of the mounting portion. The long hole of the attachment portion is a rotation restricting means for restricting the rotation range of the locking device, and is formed in an arc shape around the round hole. When the lock device is attached to the support member, the lock device is rotated in a direction in which the striker and the hook lever are properly engaged with each other in a state where the support bolt is inserted into the elongated hole of the attachment portion and temporarily fixed. Then, when the proper meshing direction is determined, the support bolt is fastened (finally tightened) to fix the lock device to the support member. Therefore, even if there is a deviation in the relative position of the locking device and the striker, if the deviation is within the range where the striker can enter the striker entry groove and the striker and the hook lever can be engaged, the removable seat Can be fixed to the vehicle body.

JP-A-10-324182

  By the way, the vehicle body and the detachable seat have various shapes, and the environment where the lock device is provided differs depending on the vehicle type. Therefore, it is desirable that the locking device is small and has a high degree of freedom in installation position. However, the lock device in which the attachment portion is extended outside the lock mechanism housing member is enlarged because the attachment portion is extended.

  Further, even if the engagement between the striker and the hook lever is adjusted by rotating the lock device, the direction of the lock device may be shifted due to the load when the support bolt is finally tightened. For this reason, it is difficult to adjust the striker and the hook lever so as to mesh with each other.

  The present invention has been made in view of the above, and an object of the present invention is to provide a lock device that can reliably engage a striker and a hook lever and can be downsized.

  To achieve the above object, a lock device according to claim 1 of the present invention includes a lock mechanism housing member having a striker entry groove into which a striker enters, a hook lever shaft provided in the lock mechanism housing member, It is rotatably arranged in the lock mechanism housing member via the hook lever shaft, and is in a meshing position that meshes with the striker that has entered the striker entry groove and a mesh release position that releases the meshing with the striker. And a hook device that is rotatably supported by a support member, wherein the hook lever shaft is rotatably provided on the lock mechanism housing member, and the striker entry groove is opened through the hook lever shaft. The lock mechanism housing member is rotatably supported by the support member in a state where the position is changed, and the striker and the hook Characterized in that within the meshing tolerance margin to permit engagement of the bar is provided with rotation limiting means for limiting the rotation of the locking mechanism housing member.

  The lock device according to a second aspect of the present invention is the lock device according to the first aspect, wherein the rotation restricting means is provided on a protrusion of the lock mechanism housing member that protrudes toward the support member, and on the support member. And the engaging portion is engaged with the engaging portion to restrict the rotation of the lock mechanism housing member.

  The lock device according to a third aspect of the present invention is the lock device according to the first aspect, wherein the rotation restricting means includes a protruding portion of the support member protruding toward the lock mechanism accommodating member, and the lock mechanism accommodating member. And engaging the protrusion and the engagement portion to restrict the rotation of the lock mechanism housing member.

  The lock device according to a fourth aspect of the present invention is the lock device according to the third aspect, wherein the engaging portion of the lock mechanism housing member is provided on an outer peripheral side surface of the lock mechanism housing member, and The lock mechanism housing member has a concave shape in which the outer shape of the lock mechanism housing member is displaced toward the hook lever shaft as viewed in the axial direction of the hook lever shaft.

  A lock device according to a fifth aspect of the present invention is the lock device according to the first aspect, wherein the rotation restricting means is interposed between the lock mechanism housing member and the support member, A rotation restricting member for applying a pressing load is provided.

  A lock device according to a sixth aspect of the present invention is the lock device according to the first aspect, wherein the lock mechanism housing member has an insertion hole through which the hook lever shaft is inserted, and the hook lever shaft is The lock has a flange having a flange interposed between the mechanism housing member and the support member, and has a through-hole through which the fastening member is inserted in the center, and the fastening member is fastened to the support member. The lock housing member has a length for rotatably supporting the mechanism housing member and the hook lever, and the locking mechanism housing member contacts the end of the hook lever shaft with the fastening member fastened to the support member. It has a height that is in contact with and that receives a pressing load from the fastening member and the flange.

  The lock device according to a seventh aspect of the present invention is the lock device according to any one of the first to sixth aspects, wherein the rotation restricting means applies a pressing load due to an elastic restoring force to the lock mechanism housing member. The lock device according to any one of claims 1 to 6, further comprising an elastic member or a friction member.

  In the locking device according to the present invention, the hook lever shaft is rotatably provided on the lock mechanism housing member, and the lock mechanism housing member is rotatably supported by the support member via the hook lever shaft. Therefore, it is not necessary to extend the mounting portion for rotating the lock device to the outside of the lock mechanism housing member, the lock mechanism housing member can be downsized, and the lock device can be downsized. Further, since the lock mechanism housing member can be reduced in size, the striker and the hook lever are within the allowable range of engagement while preventing an increase in the size of the lock device by providing a rotation restricting means for restricting the rotation of the lock mechanism housing member. Can be reliably meshed. Further, since the rotation restricting means restricts the rotation of the lock mechanism housing member within the range of the allowance for meshing, the relative position with respect to the striker can be easily adjusted.

FIG. 1 is a plan view showing a schematic configuration of a locking device according to Embodiment 1 of the present invention. FIG. 2 is a view of the locking device of FIG. 1 as viewed from the back side. 3 is a cross-sectional view taken along the line AA in FIG. FIG. 4 is a diagram illustrating an internal configuration of the locking device. FIG. 5 is an exploded perspective view showing a configuration example of a hook lever shaft insertion hole provided in the body. FIG. 6 is a diagram illustrating a relationship between the guide lever, the hook lever, and the open lever immediately after the striker starts pressing the guide lever. FIG. 7 is a diagram illustrating a relationship between the guide lever, the hook lever, and the open lever when the hook lever is engaged with the striker. FIG. 8 is a diagram illustrating the relationship between the guide lever, the hook lever, and the open lever when the engagement between the striker and the hook lever is released by rotating the open lever. FIG. 9 is a diagram illustrating the relationship between the guide lever, the hook lever, and the open lever when inertia release occurs in the hook lever. FIG. 10 is a plan view showing an example of the positional relationship between the locking device and the striker. FIG. 11 is a plan view showing a state where the lock device and the striker in the positional relationship of FIG. 10 are engaged with each other. FIG. 12 is a plan view showing a schematic configuration of the locking device according to the second embodiment of the present invention. FIG. 13 is a cross-sectional view of main components along the line BB in FIG. FIG. 14 is a cross-sectional view showing a schematic configuration of a main part in the locking device according to the third embodiment of the present invention. FIG. 15 is a cross-sectional view showing a state in which the locking device of FIG. 14 is attached to the frame. FIG. 16 is a cross-sectional view showing a modification of the locking device according to the third embodiment. FIG. 17: is a top view which shows schematic structure of the locking device which is Embodiment 4 of this invention. 18 is a right side view of the locking device shown in FIG.

  Hereinafter, embodiments of a locking device according to the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted.

(Embodiment 1)
FIG. 1 is a plan view showing a schematic configuration of a locking device according to Embodiment 1 of the present invention. FIG. 2 is a view of the locking device of FIG. 1 as viewed from the back side. 3 is a cross-sectional view taken along the line AA in FIG. FIG. 4 is a diagram illustrating an internal configuration of the locking device. FIG. 5 is an exploded perspective view showing a configuration example of a hook lever shaft insertion hole provided in the body.

  The locking device described in the present embodiment is for fixing a removable seat to a vehicle body, and is provided on a frame (support member) of a backrest portion of the removable seat. As shown in FIGS. 1 to 4, the lock device 1 accommodates a lock mechanism including a hook lever 4, an open lever 5, a guide lever 6, and the like in a lock mechanism housing member including a body 2 and a base plate 3. Has been. The locking device 1 is rotatably attached to the frame 9 by bolts 10 and nuts 11.

  The body 2 is a substantially concave case member formed of a synthetic resin, and is a striker entry groove that extends from the vehicle rear side end toward the vehicle front side at a position that is substantially the center in the vehicle vertical direction in FIG. 201 is formed. The striker entry groove 201 has a width that can accommodate the striker S provided in the vehicle body at the back, and gradually increases in width from the back to the entrance. In addition, the striker entry groove 201 of the body 2 has substantially V-shaped (back-thin shape) locking surfaces 201a and 201b that are in contact with the striker S that has entered at two points at the innermost part thereof.

  The body 2 is provided with a hook lever shaft insertion hole 202, an open lever shaft 203, a guide lever shaft 204, and a spring support portion 205. The hook lever shaft insertion hole 202 is a hole through which the hook lever shaft 7 is rotatably inserted, and is provided at a position in front of the striker entry groove 201 as shown in FIGS. 1 and 4. A rib 206 is provided on the inner peripheral surface of the hook lever shaft insertion hole 202 to prevent the hook lever shaft 7 from rattling as shown in FIG. The hook lever shaft 7 is a shaft that rotatably supports the hook lever 4. The open lever shaft 203 is a shaft that rotatably supports the open lever 5, and is provided at a position above the striker entry groove 201 as shown in FIG. The guide lever shaft 204 is a shaft that rotatably supports the guide lever 6, and is provided at a position below the striker entry groove 201 as shown in FIG. The spring support portion 205 is a protruding portion that supports the coil spring 8 that urges the hook lever 4 and the guide lever 6, and is below the hook lever shaft insertion hole 202 as shown in FIG. It is provided at a position where it does not interfere with the lever 6.

  Further, a rotation restricting portion (engaging portion) 209 is provided on the outer peripheral side surface of the body 2. The rotation restricting portion 209 extends in a radially outward direction of the rotation center X from a guide surface 209a along an arc having a radius R1 centered on the rotation center X of the locking device 1 and a circumferential end of the guide surface 209a. The first locking surface 209b and the second locking surface 209c are configured. The rotation restricting portion 209 is located closer to the rotation center X than the arc of radius R2 centered on the rotation center X of the body 2. The radius R2 is a distance from the rotation center X to a part of the body 2. That is, the rotation restricting portion 209 of the body 2 has a concave shape within the rotation locus of the body 2 and displaced from the outer shape of the body 2 toward the hook lever shaft 7 when viewed in the axial direction of the hook lever shaft 7. . The rotation restricting portion 209 constitutes a rotation restricting means for restricting the rotation angle range of the locking device 1 together with the rotation restricting protrusion (projecting portion) 94 provided on the frame 9.

  The base plate 3 is a plate-like member formed of metal or synthetic resin, and is attached so as to close the opening surface provided in the body 2 in order to accommodate the hook lever 4, the open lever 5, the guide lever 6, and the like. The base plate 3 is provided with a striker entry groove 31, a hook lever shaft insertion hole 32, a protrusion 33, body engaging portions 34a, 34b, 34c, and a body holding hole 35.

  Like the striker entry groove 201 of the body 2, the striker entry groove 31 is formed from the end on the vehicle rear side toward the vehicle front side at a position that is substantially the center in the vehicle vertical direction in FIG. 1. The striker entry groove 31 of the base plate 3 is wider than the striker entry groove 201 of the body 2, and the innermost part thereof is located on the vehicle front side with respect to the innermost part of the striker entry groove 201 of the body 2. It is formed as follows. The hook lever shaft insertion hole 32 is a hole through which one end of the hook lever shaft 7 is inserted, and is provided at a position in front of the striker entry groove 31 as shown in FIGS. 1 and 4. The protruding portion 33 is a portion that comes into contact with the head portion 1002 of the bolt 10 and is provided around the hook lever shaft insertion hole 32. The body engaging portions 34a, 34b, and 34c are portions to be engaged with the base plate locking portions 207a, 207b, and 207c of the body 2, respectively. The body holding hole 35 is a hole through which the base plate holding portion 208 of the body 2 is inserted. The base plate 3 engages the body engaging portions 34a, 34b, and 34c with the base plate engaging portions 207a, 207b, and 207c of the body 2 and inserts the base plate holding portion 208 of the body 2 into the body holding hole 35. 2 is attached.

  The hook lever 4 is engaged with the striker S provided on the vehicle body to restrain the striker S. The hook lever 4 is provided with a shaft hole 41, an engagement surface 42, a hook portion 43, a spring mounting hole 44, and a lever contact portion 45.

  The shaft hole 41 is a hole for pivotally supporting the hook lever 4 with the hook lever shaft 7 and is formed so as to be rotatably engaged with the hook lever shaft 7. The engagement surface 42 is a surface that engages with the striker S that has entered the striker entry groove 201, and is provided in a substantially arc shape centered on the shaft hole 41. The hook portion 43 is a portion that prevents the striker S engaged with the engagement surface 42 from being detached from the hook lever 4. The spring attachment hole 44 is a hole for attaching one end of the coil spring 8 supported by the spring support portion 205 of the body 2. One end of the coil spring 8 attached to the spring attachment hole 44 always applies the clockwise urging force in FIG. 4 to the hook lever 4. The lever contact portion 45 is a portion that contacts the open lever 5 and the guide lever 6 and is formed between the shaft hole 41 and the hook portion 43.

  The open lever 5 is for releasing the engagement between the striker S and the hook lever 4. The open lever 5 includes a shaft hole 51, a pull rod attachment portion 52, a push rod attachment portion 53, a first contact portion 54, a second contact portion 55, a third contact portion 56, a fourth contact portion 57, and A fifth contact portion 58 is provided.

  The shaft hole 51 is a hole for pivotally supporting the open lever 5 with the open lever shaft 203, and is formed so as to be rotatably engaged with the open lever shaft 203. The pull rod attachment portion 52 is a portion to which a pull rod (not shown) that rotates the open lever 5 when releasing the engagement between the striker S and the hook lever 4 is attached. The push rod attachment portion 53 is a portion to which a push rod (not shown) that rotates the open lever 5 when releasing the engagement between the striker S and the hook lever 4 is attached. The open lever 5 is always subjected to a counterclockwise biasing force in FIG. 4 by a coil spring (not shown). The pull rod and push rod are attached so as to rotate the open lever 5 clockwise in FIG. 4 when releasing the engagement between the striker S and the hook lever 4. The first contact portion 54 to the fifth contact portion 58 of the open lever 5 are portions that contact the hook lever 4 and the guide lever 6.

  The guide lever 6 is for moving the hook lever 4 from the release position to the engagement position when pressed by the striker S that enters the striker entry groove 201 and moves toward the innermost portion. The guide lever 6 is provided with a shaft hole 61, a guide hole 62, a first contact part 63, a second contact part 64, a third contact part 65, and a fourth contact part 66.

  The shaft hole 61 is a hole for pivotally supporting the guide lever 6 with the guide lever shaft 204, and is formed so as to be rotatably engaged with the guide lever shaft 204. The guide hole 62 is a hole for restricting the rotation range of the guide lever 6 around the guide lever shaft 204 and is formed in a long hole shape. The hook lever shaft 7 is inserted into the guide hole 62, and the rotation of the guide lever 6 is restricted when the guide hole 62 and the hook lever 7 abut (engage). The first contact portion 63 and the second contact portion 64 of the guide lever 6 are portions that contact the hook lever 4 and the open lever 5. The third contact portion 65 of the guide lever 6 is a portion where the other end of the coil spring 8 comes into contact (sliding contact). The fourth contact portion 66 of the guide lever 6 is a portion where the striker S contacts.

  The hook lever shaft 7 is a support member for pivotally supporting the hook lever 4 and rotatably supporting the body 2. The hook lever shaft 7 includes a cylindrical portion 72 having a through hole 71 through which the shaft 1001 of the support bolt 10 is inserted at the center, and a flange 73 provided at one end of the cylindrical portion 72. . The cylindrical portion 72 is rotatably inserted into the hook lever shaft insertion hole 202 of the body 2. The cylindrical portion 72 has a length that allows the body 2 to rotate in a state in which the lock device 1 is fastened to the frame 9 with the support bolt 10 (support member) and the nut 11. That is, as shown in FIG. 3, the cylindrical portion 72 has a length that protrudes from the hook lever shaft insertion hole 32 of the base plate 3 at the end (the other end) opposite to the end having the flange 73. As shown in FIG. 3, the flange 73 is a portion that is interposed between the body 2 and the frame 9 and generates a predetermined gap between the body 2 and the frame 9.

  The frame 9 is a support member disposed on the backrest portion of the removable sheet as described above. The main body 91 of the frame 9 is provided with a fastening hole 92, an overhang 93, and a rotation restricting projection 94. The fastening hole 92 is a hole through which the shaft 1001 of the support bolt 10 is inserted. The overhang portion 93 is a portion where the rotation restricting protrusion 94 is provided, and is a portion protruding from the main body portion 91 toward the rotation restricting portion 209 provided on the body 2. The rotation restricting protrusion 94 is provided so as to protrude from the overhanging portion 93 toward the body 2 and to come into contact with the rotation restricting portion 209 (guide surface 209a). The rotation restricting protrusion 94 is provided so as to abut on the vicinity of the center in the circumferential direction of the guide surface 209a provided on the body 2 when the angle of the locking device 1 with respect to the entry direction of the striker S is a standard angle.

  Now, in the locking device 1 of the present embodiment, the hook lever shaft 7 is rotatably provided on the body 2 as described above. When the locking device 1 is attached to the frame 9, as shown in FIG. 3, the flange 73 of the hook lever shaft 7 is brought into contact with the frame 9 to create a gap between the body 2 and the frame 9. Then, the shaft 1001 of the support bolt 10 is inserted into the through hole 71 of the hook lever shaft 7 and the fastening hole 92 of the frame 9 from the base plate 3 side, and the support bolt 10 and the nut 11 are fastened. At this time, the head 1002 of the support bolt 10 is in contact with the end of the hook lever shaft 7 and the protruding portion 33 of the base plate 3. Thus, the locking device 1 according to the present embodiment is rotatably supported by the frame 9 with the hook lever shaft 7 as the rotation axis and the position of the entrance of the striker entry groove 201 being changed.

  The rotation restricting portion 209 of the body 2 and the rotation restricting protrusion 94 of the frame 9 are closer to the rotation center X than the arc of radius R2 centered on the rotation center X of the body 2. The radius R2 is a distance from the rotation center X to a part of the body 2. That is, the rotation restricting portion 209 of the body 2 and the rotation restricting protrusion 94 of the frame 9 which are rotation restricting means are provided in the rotation locus of the body 2.

  Before describing the effects of the rotation restricting portion 209 of the body 2 and the rotation restricting protrusion 94 of the frame 9 in the locking device 1 of the present embodiment, referring to FIGS. 4 and 6 to 9, the locking device 1 The operation of will be briefly described.

  FIG. 6 is a diagram illustrating a relationship between the guide lever, the hook lever, and the open lever immediately after the striker starts pressing the guide lever. FIG. 7 is a diagram illustrating a relationship between the guide lever, the hook lever, and the open lever when the hook lever is engaged with the striker. FIG. 8 is a diagram illustrating the relationship between the guide lever, the hook lever, and the open lever when the engagement between the striker and the hook lever is released by rotating the open lever. FIG. 9 is a diagram illustrating the relationship between the guide lever, the hook lever, and the open lever when inertia release occurs in the hook lever.

  The lock device 1 of the present embodiment is attached to the frame 9 of the removable seat as described above. In that case, the striker S is provided in the vehicle body. When the detachable seat to which the locking device 1 is attached is fixed to the vehicle body, the striker S is caused to enter the striker entry groove 201 by moving the detachable seat to the vehicle rear side in FIG.

  The hook lever 4, the guide lever 6 and the open lever 5 in the unlocked state before the striker S enters the striker entry groove 201 are in the positional relationship shown in FIG. The guide lever 6 tries to rotate clockwise in FIG. 4 by the urging force received from the coil spring 8, but due to the engagement between the guide hole 62 and the hook lever shaft 7, the fourth abutting portion 66 becomes the striker entry groove 201. Is held at a predetermined position across. The hook lever 4 tries to rotate clockwise in FIG. 4 by the urging force received from the coil spring 8, but the lever abutting portion 45 abuts on the first abutting portion 63 of the guide lever 6 to restrict the rotation, The hook portion 43 is held at a position (release position) where the striker entry groove 201 is opened. The open lever 5 tries to rotate counterclockwise in FIG. 4 by an urging force received from a coil spring (not shown), but the first contact portion 54 contacts the second contact portion 64 of the guide lever 6 and rotates. Regulated and held in place.

  When the striker S enters the striker entry groove 201 of the locking device 1 in the unlocked state, the striker S moves toward the innermost portion and contacts the fourth contact portion 66 of the guide lever 6. When the striker S comes into contact with the fourth contact portion 66 of the guide lever 6, the guide lever 6 rotates counterclockwise in response to a pressure from the striker S, as shown in FIG. When the guide lever 6 rotates counterclockwise, the contact between the lever contact portion 45 of the hook lever 4 and the first contact portion 63 of the guide lever 6 is released. Therefore, the hook lever 4 rotates clockwise by the urging force received from the coil spring 8. As a result, the engagement between the striker S and the engagement surface 42 of the hook lever 4 is started. Further, when the guide lever 6 rotates counterclockwise, the contact between the first contact portion 54 of the open lever 5 and the second contact portion 64 of the guide lever 6 is released. Therefore, the open lever 5 rotates counterclockwise by the biasing force received from a coil spring (not shown).

  When the clockwise rotation of the hook lever 4 proceeds and the hook portion 43 rotates to the engagement position crossing the striker entry groove 201, the hook lever 4 and the striker S are engaged with each other as shown in FIG. Is done. The striker S is restrained by the engagement surface 42 of the hook lever 4 and the striker entry groove 201 of the body 2. On the other hand, the guide lever 6 tries to rotate clockwise by the urging force received from the coil spring 8, but the fourth abutting portion 66 abuts against the striker S so that the rotation is restricted and held at the rotational position. In addition, the open lever 5 that tries to rotate counterclockwise by an urging force received from a coil spring (not shown) is restricted in rotation by the fifth contact portion 58 coming into contact with the lever contact portion 45 of the hook lever 4. Held in.

  At this time, if the open side end portion (the end portion on the tip side of the hook portion 43) of the engagement surface 42 of the hook lever 4 is formed in an arc shape with the shaft hole 41 as the center, it is detached from the constrained striker S. The hook lever 4 rotates in the direction in which the striker S and the engagement surface 42 are disengaged (counterclockwise in FIG. 7) even if a force in the direction to move (force toward the vehicle rear side) is applied. There is no. Further, if the hook portion 43 is tapered such that the distance to the shaft hole 41 gradually decreases from the middle of the engagement surface 42 toward the back side, the striker S is in contact with the engagement surface 42 at one point. The wedge effect can be obtained. For this reason, if the innermost part of the striker entry groove 201 formed in the body 2 is made into a substantially V-shaped (backward-thinned) locking surface 201a, 201b, the striker S is placed at the innermost part of the striker entry groove 201. The stopper surfaces 201a and 201b) and the engaging surface 42 are held at one point, and the striker S can be prevented from rattling. Therefore, it is possible to suppress the generation of abnormal noise due to rattling of the striker S, and it is possible to securely fix the detachable seat to the vehicle body.

  Furthermore, if the hook part 43 is tapered, even if there is a gap between the shaft hole 41 of the hook lever 4 and the hook lever shaft 7, the striker S is connected to the locking surfaces 201a, 201b of the striker entry groove 201. It is possible to prevent relative movement between the body 2 (hook lever shaft 7) and the hook lever 4 when restrained at two points and one point of the engaging surface 42. Therefore, in the state where the striker S is restrained, even if there is a gap between the shaft hole 41 of the hook lever 4 and the hook lever shaft 7, the generation of abnormal noise due to rattling can be suppressed. In addition, since a gap can be secured between the shaft hole 41 of the hook lever 4 and the hook lever shaft 7, the insertability of the hook lever 4 can be improved.

  When releasing the fixing of the detachable seat to the vehicle body, that is, when releasing the engagement between the striker S and the hook lever 4 (engagement surface 42), the push rod or the pull rod is operated as shown in FIG. Then, the open lever 5 is rotated clockwise. When the open lever 5 is rotated clockwise, the third contact portion 56 contacts and presses the lever contact portion 45 of the hook lever 4. Therefore, the hook lever 4 rotates counterclockwise, and the meshing between the striker S and the hook lever 4 is released. Then, the guide lever 6 rotates clockwise to push out the striker S from the striker entry groove 201. Thereafter, when the push rod or pull rod is returned, the open lever 5 rotates counterclockwise, and the first contact portion 54 contacts the second contact portion 64 of the guide lever 6 as shown in FIG. Held in. Further, when the open lever 5 is rotated counterclockwise, the lever abutment portion 45 is not pressed by the third abutment portion 56, so that the hook lever 4 is rotated clockwise, as shown in FIG. The contact portion 45 is held at a position where it comes into contact with the first contact portion 63 of the guide lever 6.

  Furthermore, in the locking device 1 of the present embodiment, when a force is generated that causes the hook lever 4 to release inertia (opening not depending on the operation of the open lever 5) when the detachable seat is fixed to the vehicle body. For example, as shown in FIG. 9, the lever contact portion 45 of the hook lever 4 contacts the fourth contact portion 57 of the open lever 5. Since the counterclockwise urging force is acting on the open lever 5, the lever contact portion 45 of the hook lever 4 contacts and engages with the first contact portion 57 of the open lever 5, so that the hook lever The counterclockwise rotation of 4 can be suppressed. Therefore, the locking device 1 of the present embodiment can prevent a situation where the fixing of the detachable seat to the vehicle body is inadvertently released.

  FIG. 10 is a plan view showing an example of the positional relationship between the locking device and the striker. FIG. 11 is a plan view showing a state where the lock device and the striker in the positional relationship of FIG. 10 are engaged with each other.

  When the locking device 1 according to the present embodiment is attached to the frame 9 of the detachable seat, the striker S may become a striker, for example, as shown in FIG. 10 due to errors in the mounting position of the locking device 1 or the mounting position of the striker S. The center position P when entering the entry groove 201 may be lower than the reference position O.

  In the locking device 1 according to the present embodiment, the width of the striker entry groove 201 provided in the body 2 is gradually increased from the inner portion toward the entrance of the striker S. Further, as described above, the locking device 1 of the present embodiment is rotatably supported by the frame 9 with the hook lever shaft 7 as a rotation axis. Therefore, even when the position of the striker S with respect to the body 2 (the striker entry groove 201) is displaced, the deviation amount D is within the range in which the striker S can enter the striker entry groove 201 (within the allowable range of engagement). If there is, the striker S rotates the body 2 clockwise from the state shown in FIG. 10, so that the striker S moves toward the innermost part of the striker entry groove 201. As a result, as shown in FIG. 11, the striker S and the hook lever 4 are engaged with each other while the body 2 is rotated clockwise. Although illustration is omitted, when the approach position of the striker S is above the reference position O, the striker S and the hook lever 4 are engaged with each other by rotating the body 2 counterclockwise. Furthermore, the cylindrical portion 72 of the hook lever shaft 7 projects from the opening of the base plate 3 at the end (the other end) opposite to one end having the flange 73 in a state where the support bolt 10 is fastened to the frame 9. The length is in contact with 10 heads 1002. Therefore, the body 2 supported by the support bolt 10 can be reliably rotated.

  In the locking device 1 of the present embodiment, the rotation restricting portion 209 (guide surface 209a) provided on the body 2 is in contact with the rotation restricting protrusion 94 provided on the frame 9. Therefore, the rotation range of the body 2 is restricted to a range from an angle at which the rotation restricting protrusion 94 contacts the first locking surface 209b to an angle at which the rotation locking projection 94 contacts the second locking surface 209c. That is, by setting the rotation range of the body 2 by the circumferential length of the guide surface 209a, the rotation range of the body 2 can be set within the allowable range of engagement. Therefore, the locking device 1 according to the present embodiment can prevent a situation in which the body 2 rotates to an angle exceeding the allowable range of the engagement allowance and the striker S and the hook lever 4 cannot be engaged with each other. That is, the lock device 1 of the present embodiment can reliably mesh the striker S and the hook lever 4 within the range of the allowance allowance.

  As described above, the locking device 1 according to the present embodiment causes the striker S to be rotated by the rotation of the locking device 1 even when the striker S is displaced in the vertical direction in FIG. 1 with respect to the body 2 (the striker entry groove 201). And the hook lever 4 can be engaged with each other. Therefore, the allowance allowance can be ensured without increasing the width of the inner portion of the striker entry groove 201, and the hook lever 4 can be downsized. If the hook lever 4 can be downsized, the distance from the innermost part of the striker entry groove 201 (the position where the striker S and the hook lever 4 are engaged) to the hook lever shaft 7 can be shortened, so the body 2 can be downsized. It is. In addition, by using the hook lever shaft 7 as the rotation axis of the body 2, an attachment portion for rotating the body 2 does not need to extend outside the body 2. Further, the rotation restricting portion 209 of the body 2 that restricts the rotation range of the lock device 1 and the rotation restricting projection 94 of the frame 9 are provided in the rotation locus of the lock device 1 (body 2). Therefore, in the lock device 1 according to the present embodiment, the lock mechanism housing member (body 2 and base plate 3) can be downsized, and the lock device 1 as a whole can be downsized.

  In addition, when the locking device 1 of the present embodiment is attached to the frame 9, the flange 73 is interposed between the body 2 and the frame 9, and a gap is generated. Therefore, when the locking device 1 rotates, there are few factors that obstruct the rotation of the locking device 1 such as frictional resistance between the body 2 and the frame 9, and the locking device 1 rotates smoothly. In addition, the rotatable range of the locking device 1 can be restricted within the allowable range of engagement by the contact between the rotation restricting portion 209 provided on the body 2 and the rotation restricting protrusion 94 provided on the frame 9. Therefore, even when the relative position between the locking device 1 (the striker entry groove 201 of the body 2) and the striker S is deviated, the striker S and the hook lever 4 are securely engaged, and the striker by the body 2 and the hook lever 4 is engaged. S can be reliably restrained. Therefore, the locking device 1 of the present embodiment can securely fix the detachable seat to the vehicle body.

  When the guide surface 209a of the rotation restricting portion 209 provided on the body 2 and the rotation restricting protrusion 94 provided on the frame 9 are brought into contact with each other, any one surface (contact surface) is formed of an elastic member or a friction member. May be. When the guide surface 209a or the rotation restricting protrusion 94 is formed of an elastic member or a friction member, the sliding resistance is increased, so that the locking device 1 can be prevented from rattling.

  In the present embodiment, the rotation restricting portion 209 has a guide surface 209a along the circumference of the radius R1 with the rotation center X of the lock device 1 as the center. However, the rotation restricting portion 209 only needs to be in contact with the rotation restricting protrusion 94 provided on the frame 9 to restrict the rotation of the body 2. Therefore, the rotation restricting portion 209 may be a flat surface or a curved surface in which a portion corresponding to the guide surface 209a does not contact the rotation restricting protrusion 94.

(Embodiment 2)
FIG. 12 is a plan view showing a schematic configuration of the locking device according to the second embodiment of the present invention. 13 is a cross-sectional view showing main components along the line BB in FIG.

  In the lock device described in the first embodiment, the rotation restricting portion 209 provided on the body 2 and the rotation restricting protrusion 94 provided on the frame 9 restrict the rotation range of the lock device 1 (body 2). On the other hand, in the locking device of the present embodiment, as shown in FIGS. 12 and 13, the locking device includes a rotation restricting protrusion 2010 provided on the body 2 and an arc-shaped rotation restricting long hole 95 provided on the frame 9. The rotation range of 1 is regulated.

  The rotation restricting projection 2010 of the body 2 protrudes from the bottom surface (the surface facing the frame 9) of the body 2 toward the frame 9 and is inserted into a rotation restricting long hole 95 provided in the frame 9. The rotation restriction long hole 95 includes arcuate guide surfaces 95a and 95b, an arcuate first locking surface 95c that connects one ends of the guide surfaces 95a and 95b, and the other end of the guide surfaces 95a and 95b. It is comprised with the circular arc-shaped 2nd locking surface 95d which connects mutually. The rotation restricting protrusion 2010 protrudes in the opposite direction to the base plate holding portion 208 from the position where the base plate holding portion 208 of the body 2 is provided. Further, the rotation restriction long hole 95 of the frame 9 is formed from the main body portion 91 to the overhang portion 93 of the frame 9 so as to overlap the body 2. Therefore, also in the present embodiment, the rotation restricting means (the rotation restricting protrusion 2010 and the rotation restricting long hole 95) for restricting the rotatable angle range of the lock device 1 is provided in the rotation locus of the lock device 1 (body 2). It has been.

  In the locking device 1 of the present embodiment, the hook lever shaft 7 is rotatably provided on the body 2 as in the first embodiment, and the body 2 rotates while being supported by the frame 9. Further, since the rotation restricting projection 2010 provided on the body 2 is engaged with the rotation restricting long hole 95 provided on the frame 9, the rotation restricting projection 2010 contacts the first locking surface 95c when the body 2 rotates. It is regulated within a range from the angle to the angle contacting the second locking surface 95d. Therefore, by setting the rotation range of the body 2 by the circumferential lengths of the guide surfaces 95a and 95b, the rotation range of the body 2 can be set within the allowable range of engagement. Therefore, the locking device according to the present embodiment can prevent a situation in which the body 2 rotates to an angle exceeding the allowable range of the engagement allowance and the striker S and the hook lever 4 cannot be engaged with each other. That is, the lock device of the present embodiment can reliably mesh the striker S and the hook lever 4 within the range of the allowance allowance.

  Furthermore, when the locking device 1 of the present embodiment is attached to the frame 9, the flange 73 is interposed between the body 2 and the frame 9, and a gap is generated. Therefore, when the locking device 1 rotates, there are few factors that obstruct the rotation of the locking device 1 such as frictional resistance between the body 2 and the frame 9, and the locking device 1 rotates smoothly. In addition, the rotation range of the lock device 1 can be restricted within the allowable range of engagement by the engagement of the rotation restriction protrusion 2010 provided on the body 2 and the rotation restriction long hole 95 provided on the frame 9. Therefore, even when the relative position between the locking device 1 (the striker entry groove 201 of the body 2) and the striker S is deviated, the striker S and the hook lever 4 are securely engaged, and the striker by the body 2 and the hook lever 4 is engaged. S can be reliably restrained. Therefore, the lock device of the present embodiment can securely fix the detachable seat to the vehicle body.

(Embodiment 3)
FIG. 14 is a cross-sectional view showing a schematic configuration of a main part of the locking device according to the third embodiment of the present invention. FIG. 15 is a cross-sectional view showing a state in which the locking device of FIG. 14 is attached to the frame.

  In the locking device according to the first embodiment and the second embodiment, the protrusion provided on either the body 2 or the frame 9 and the engaging portion provided on either the body 2 or the frame 9 are brought into contact with each other. In this way, the body 2 is prevented from rotating to an angle exceeding the meshing allowance. On the other hand, the locking device of the present embodiment increases the rotational resistance between the body 2 and the hook lever shaft 7 by the pressing load when fastened by the support bolt 10 and the nut 11, thereby Regulate rotation.

  As shown in FIG. 14, the locking device 1 according to the present embodiment has a protrusion protruding around the hook lever shaft insertion hole 32 of the base plate 3 on the side opposite to the bottom surface of the body 2 (the surface facing the frame 9). Part 36. Before attaching the locking device 1 to the frame 9, the protrusion 36 has a distance W2 from the bottom surface of the body 2 to the protrusion end of the protrusion 36 so that the end of the hook lever shaft 7 on the base plate 3 side from the bottom surface of the body 2. It is provided so as to be longer than the distance W1.

  When the lock device 1 of the present embodiment is fastened to the frame 9 by the support bolt 10 and the nut 11, the lock device 1 is tightened until the head portion 1002 of the support bolt 10 comes into contact with the end of the hook lever shaft 7 as shown in FIG. 15. Then, due to the pressing load received from the head 1002 of the support bolt 10 and the nut 11, the contact surface between the head 1002 of the support bolt 10 and the protrusion 36 of the base plate 3, the bottom surface of the body 2, and the flange of the hook lever shaft 7. A frictional force is generated on the contact surface with 73, and the rotational resistance between the body 2 and the hook lever shaft 7 increases. Therefore, it is possible to prevent a situation in which the body 2 rotates to an angle exceeding the allowable range of the engagement allowance and the striker S and the hook lever 4 cannot be engaged with each other.

  FIG. 16 is a cross-sectional view showing a modification of the locking device according to the third embodiment.

  The locking device 1 according to the present embodiment regulates the rotation of the body 2 by increasing the rotational resistance between the body 2 and the hook lever shaft 7 by the pressing load when fastened to the frame 9 by the support bolt 10 and the nut 11. . In order to increase the rotational resistance between the body 2 and the hook lever shaft 7 by the pressing load, instead of providing the projection 36 on the base plate 3, for example, as shown in FIG. 16, the head 1002 of the support bolt 10 and the base plate 3 The elastic member 12 may be interposed between the two. For the elastic member 12, for example, ring-shaped rubber can be used. The elastic member 12 is dimensioned such that when the lock device 1 is fastened to the frame 9 by the support bolt 10 and the nut 11, the elastic member 12 is elastically deformed and a pressing load is applied to the base plate 3. Then, when the locking device 1 is attached to the frame 9, a pressing load due to the elastic restoring force of the elastic member 12 is applied to the base plate 3, and the rotational resistance of the lock mechanism housing members (the body 2 and the base plate 3) increases.

(Embodiment 4)
FIG. 17: is a top view which shows schematic structure of the locking device which is Embodiment 4 of this invention. 18 is a right side view of the locking device shown in FIG.

  In the present embodiment, the elastic members 13 and 14 are also interposed between the body 2 and the frame 9 in order to restrict the rotation of the body 2. The elastic members 13 and 14 are made thicker than the gap between the body 2 and the frame 9 in a state where the locking device 1 is attached to the frame 9, and are fixed to the frame 9. Then, when the locking device 1 is fastened to the frame 9 with the support bolt 10 and the nut 11, the elastic members 13 and 14 are elastically deformed and press the body 2. Therefore, when the body 2 rotates, friction occurs on the contact surface between the elastic members 13 and 14 and the body 2, and the rotational resistance between the body 2 and the hook lever shaft 7 increases. Therefore, it is possible to prevent a situation in which the body 2 rotates to an angle exceeding the allowable range of the engagement allowance and the striker S and the hook lever 4 cannot be engaged with each other. At this time, as shown in FIG. 17, if the elastic member 12 is also interposed between the head 1002 of the support bolt 10 and the base plate 3, a pressing load from the elastic member 12 is also applied. The effect of regulating is further increased.

  A friction member may be interposed between the body 2 and the frame 9 instead of the elastic members 13 and 14.

  As mentioned above, although embodiment of the locking device based on this invention was described, this invention is not limited to the structure shown in said embodiment, In the range which does not deviate from the summary, it can change suitably. Of course.

  For example, the support member that rotatably supports the locking device 1 is not limited to the frame 9 of the backrest portion of the removable seat, but may be a frame of the seat surface portion of the removable seat. Moreover, the locking device according to the present invention is not limited to a detachable seat but can be provided on a movable seat. Furthermore, the locking device according to the present invention can be provided in the vehicle body. When the lock device according to the present invention is provided in the vehicle body, the support member that rotatably supports the lock device 1 is not limited to the frame in the vehicle body, and may be a floor member.

  Further, the configuration of the locking device 1 (locking mechanism) is not limited to the configuration shown in the embodiment, and can be changed as appropriate.

DESCRIPTION OF SYMBOLS 1 Locking device 2 Body 201 Striker entry groove 201a, 201b Locking surface 202 Hook lever shaft insertion hole 203 Open lever shaft 204 Guide lever shaft 205 Spring support portion 206 Rib 207a, 207b, 207c Base plate locking portion 208 Base plate holding portion 209 Rotation Restriction portion 209a Guide surface 209b First engagement surface 209c Second engagement surface 2010 Rotation restriction projection 3 Base plate 31 Strike entry groove 32 Hook lever shaft insertion hole 33 Projection portion 34a, 34b, 34c Body engagement portion 35 Body holding portion 4 Hook lever 41 Shaft hole 42 Engagement surface 43 Hook part 44 Spring mounting hole 45 Lever contact part 5 Open lever 51 Shaft hole 52 Pull rod mounting part 53 Push rod mounting part 54 First contact part 55 Second contact part 56 Second 3 Contact portion 57 Fourth contact portion 58 Fifth contact portion 6 Guide lever 61 Shaft hole 62 Guide hole 63 First contact portion 64 Second contact portion 65 Third contact portion 66 Fourth contact portion 7 Hook lever Shaft 71 Through hole 72 Cylindrical part 73 Flange 8 Coil spring 9 Frame (support member)
91 Body portion 92 Fastening hole 93 Overhang portion 94 Rotation restricting projection 95 Rotation restricting elongated hole 95a, 95b Guide surface 95c First engaging surface 95d Second engaging surface 10 Support bolt 1001 Shaft 1002 Head 11 Nut 12, 13, 14 Elastic members

Claims (7)

A lock mechanism housing member having a striker entry groove into which a striker enters, a hook lever shaft provided on the lock mechanism housing member, and rotatably disposed on the lock mechanism housing member via the hook lever shaft, A locking device that includes a meshing position that meshes with the striker that has entered the striker entry groove and a hook lever that moves to a meshing release position that releases meshing with the striker, and is rotatably supported by a support member;
The hook lever shaft is rotatably provided on the lock mechanism housing member,
The lock mechanism housing member is rotatably supported by the support member in a state in which the opening position of the striker entry groove is changed via the hook lever shaft.
A lock device comprising a rotation restricting means for restricting the rotation of the lock mechanism housing member within a range of an allowance allowance for allowing the striker and the hook lever to engage with each other. The rotation restricting means is
A protrusion of the lock mechanism housing member protruding toward the support member, and an engaging portion provided on the support member;
The locking device according to claim 1, wherein the protrusion is engaged with the engaging portion to restrict rotation of the lock mechanism housing member. The rotation restricting means is
A protrusion of the support member protruding toward the lock mechanism housing member, and an engaging portion of the lock mechanism housing member,
The locking device according to claim 1, wherein the protrusion is engaged with the engaging portion to restrict rotation of the lock mechanism housing member.   The engaging portion of the lock mechanism housing member is provided on an outer peripheral side surface of the lock mechanism housing member, and the outer shape of the lock mechanism housing member is on the hook lever shaft side when viewed in the axial direction of the hook lever shaft. The locking device according to claim 3, wherein the locking device has a displaced concave shape. The rotation restricting means is
The locking device according to claim 1, further comprising a rotation regulating member that is interposed between the lock mechanism housing member and the support member and applies a pressing load to the lock mechanism housing member. The lock mechanism housing member has an insertion hole through which the hook lever shaft is inserted,
The hook lever shaft has a cylindrical shape having a flange interposed between the lock mechanism housing member and the support member and having a through-hole through which a fastening member is inserted in a central portion, and supports the fastening member. Having a length to rotatably support the lock mechanism housing member and the hook lever in a state of being fastened to the member,
The lock mechanism housing member has a height to receive a pressing load from the fastening member and the flange while the fastening member abuts on an end of the hook lever shaft in a state where the fastening member is fastened to the support member. The locking device according to claim 1.   The lock device according to any one of claims 1 to 6, wherein the rotation restricting means includes an elastic member or a friction member.

Images