WO2018216521A1

WO2018216521A1 - Lock device

Info

Publication number: WO2018216521A1
Application number: PCT/JP2018/018481
Authority: WO
Inventors: 敦士曽我部
Original assignee: 株式会社パイオラックス
Priority date: 2017-05-26
Filing date: 2018-05-14
Publication date: 2018-11-29
Also published as: JPWO2018216521A1; JP6727743B2

Abstract

This lock device 10 is provided with: a rotatably supported operating member 20; a pair of rods which move forward and backward relative to the lock section of a stationary member in coordination with the operation of the operating member 20; a base member 34 affixed to an opening and closing member; and a gear member 24 rotatably supported by the base member 34. The pair of rods engage with the gear member 24 and move forward and backward in coordination with each other. The base member 34 has a pair of guides for guiding each of the forward and backward movements of the pair of rods.

Description

Locking device

The present invention relates to a lock device attached to an opening / closing member.

A locking device for holding the opening / closing member in a closed state is attached to the opening / closing member that opens and closes the opening of the glove box of the vehicle. The user operates the operating member of the locking device to release the lock and open the glove box.

The locking element provided in the door of the glove box disclosed in Patent Document 1 advances and retracts the first rod and the second rod, and the first rod and the second rod, which are brought into a locked position or a released position by moving forward and backward. And a pinion meshing with the first rod and the second rod, and a helical spring mounted on the first rod. The first rod and the second rod are configured like a rack gear and mesh with the pinion.

JP 2016-84001 A

In the technique disclosed in Patent Document 1, the first rod and the second rod hit against the housing portion of the glove box when the door is opened and closed, etc., so that the first rod and the second rod move back and forth. May occur.

The present invention has been made in view of such problems, and an object thereof is to provide a locking device that stabilizes the advance and retreat of the first rod and the second rod.

In order to solve the above-described problems, a lock device according to an aspect of the present invention is a lock device that can hold an open / close member attached to an opening of a fixed member in a locked state, and is rotatably supported. An operating member, a pair of rods that advance and retract to the locking portion of the fixing member in conjunction with the operation of the operating member, a base member that is fixed to the opening and closing member, and a gear member that is rotatably supported by the base member. Prepare. The pair of rods mesh with the gear member and advance and retract in conjunction with each other, and the base member has a pair of guide portions that respectively guide the advance and retreat of the pair of rods.

According to the present invention, it is possible to provide a lock device that stabilizes the advance and retreat of the first rod and the second rod.

It is a figure for demonstrating the locking device of 1st Example. It is an exploded view of the 1st subassembly of a locking device. It is an exploded view of the 2nd subassembly of a locking device. It is a figure for demonstrating a gear member. It is a figure for demonstrating a 1st rod. It is a perspective view of a base member. FIG. 7A is a rear view of the base member, and FIG. 7B is a side view of the base member. It is a rear view of the 2nd subassembly of a locking device. It is a figure for demonstrating attachment of the locking device to an opening-and-closing member. It is a figure for demonstrating the 2nd subassembly of 2nd Example. It is a figure for demonstrating the 2nd subassembly of 3rd Example. It is a figure for demonstrating the 2nd subassembly of 4th Example. It is a figure for demonstrating the 2nd subassembly of 5th Example.

FIG. 1 is a view for explaining a locking device 10 of the first embodiment. FIG. 1 shows the locking device 10 attached to the opening / closing member 12. The opening / closing member 12 actually has two plate-like members bonded together and accommodates the locking device 10 in the space inside thereof, but FIG. 1 omits the inner member on the back side of the opening / closing member 12 covering the locking device 10. It is illustrated.

The opening / closing member 12 is a lid member for a glove box of a vehicle, for example, and includes an outer member and an inner member. Although the outer member of the opening / closing member 12 shown in FIG. 1 is shown in a planar shape for convenience of explanation, it is actually formed according to the shape of the opening of the glove box and may be formed in a curved shape. The glove box is a fixing member having a recess which is a storage space provided in the instrument panel, and the opening / closing member 12 is rotatably attached to the glove box and opens and closes the opening of the recess. The opening / closing member may be provided with a storage portion, and the glove box itself may be used as the opening / closing member, and the storage space of the clove box may be opened by rotating the clove box.

The opening / closing member 12 is formed with an attachment port 12a for attaching the lock device 10. The locking device 10 attached to the opening / closing member 12 locks the opening / closing member with respect to the opening of the glove box and holds it in the closed state. The locking device 10 according to the first embodiment is a side-type locking device that enables the operation member 20 to be operated in the width direction of the opening / closing member.

The lock device 10 includes an operation member 20, an attachment member 22, a gear member 24, a first rod 26, a second rod 28, a spring member, a coil spring, a base member 34, and a cushion.

The locking device 10 is provided in a housing space defined between the outer member and the inner member of the opening / closing member. The attachment member 22 supports the operation member 20 and is fixed to the opening / closing member 12. The operation member 20 is rotatably supported by the attachment member 22 and exposed to the front side of the attachment port 12a. The user releases the lock by inserting a finger into the back side of the operation member 20 from the recess 12 b and pulling the operation member 20.

The gear member 24 is rotatably supported by the base member 34 and meshes with the first rod 26 and the second rod 28 (which are simply referred to as “rods” when they are not distinguished from each other). The user's operation force is transmitted from the operation member 20 to the first rod 26, from the first rod 26 to the gear member 24, and from the gear member 24 to the second rod 28. The gear member 24 rotates in accordance with the rotation of the operation member 20, and the

rods

26 and 28 advance and retract in the longitudinal direction in conjunction with the rotation of the gear member 24. The

rods

26 and 28 can be engaged and disengaged, that is, engaged and disengaged from the hole-shaped lock portion of the glove box in conjunction with the rotation of the operation member 20.

The first rod 26 is inserted through the first support hole 12c of the opening / closing member 12, and the second rod 28 is inserted through the second support hole 12d of the opening / closing member 12. When the back side of the locking device 10 is covered with an inner member of the opening / closing member 12 (not shown in FIG. 1), the distal end portion of the first rod 26 and the distal end portion of the second rod 28 are brought out to the outside. In the first rod 26 and the second rod 28, the side inserted into the lock portion of the glove box is referred to as the front end, and the side connected to the gear member 24 is referred to as the rear end.

The first support hole portion 12c and the second support hole portion 12d of the opening / closing member 12 are formed so as to penetrate the wall portion protruding from the back surface of the opening / closing member 12. The peripheral edges of the through holes of the first support hole portion 12c and the second support hole portion 12d are elastically contacted with the

rods

26 and 28, and the

rods

26 and 28 are moved while suppressing rattling of the

rods

26 and 28. An elastic part for guiding may be provided.

When the user operates the operation member 20, the gear member 24 is rotated via the first rod 26, and the

rods

26 and 28 are hole-shaped locks formed in a glove box that is a fixed member according to the rotation of the gear member 24. Enter and exit each department. That is, the

rods

26 and 28 advance and retract to the lock portion of the fixed member in conjunction with the operation of the operation member 20. When the tips of the

rods

26 and 28 enter the lock portion of the glove box, the open / close member is locked, and when the

rods

26 and 28 come out of the lock portion, the open / close member is unlocked. The direction in which the

rods

26 and 28 engage with the lock portion is referred to as the traveling direction of the

rods

26 and 28. The direction in which the

rods

26 and 28 come out of the lock portion and release the engagement is referred to as the retracting direction of the

rods

26 and 28.

The base member 34 accommodates the gear member 24 and the like, and is fixed to a base mounting portion 12e formed at the center of the opening / closing member 12.

FIG. 2 is an exploded view of the first subassembly of the locking device 10. The operation member 20, the mounting member 22, the coil spring 32, and the cushion 36 are assembled to constitute a first subassembly. The first subassembly can be attached to the opening / closing member 12 from the front side or the back side of the opening / closing member 12.

The operation member 20 includes a shaft hole portion 40 formed in an arc shape and a transmission portion 42 that stands vertically from the back surface of the operation member 20. A pair of shaft hole portions 40 are formed on the side surface of the operation member 20. The transmission part 42 penetrates through the attachment member 22 and protrudes to the back side, and can contact the first rod 26. The transmission unit 42 pushes the first rod 26 according to the rotation of the operation member 20, and transmits the operation force to the operation member 20 to the first rod 26.

The mounting member 22 has a pair of shaft support portions 44 that protrude from both side surfaces and a cushion holding portion 46 that holds the cushion 36. The shaft support portion 44 is inserted into the shaft hole portion 40 of the operation member 20, and the operation member 20 and the attachment member 22 are connected.

The coil spring 32 is provided between the operation member 20 and the attachment member 22 and urges the operation member 20 toward the closed state. The operation member 20 is returned from the open state to the closed state by the coil spring 32. When the operation member 20 is rotated in the closing direction by the coil spring 32, the cushion 36 hits the operation member 20 and stops rotating.

FIG. 3 is an exploded view of the second subassembly of the locking device 10. The gear member 24, the first rod 26, the second rod 28, the spring member 30, and the base member 34 are assembled to constitute a second subassembly. The second subassembly is attached to the opening / closing member 12 from the back side of the opening / closing member 12. Each member shown in FIG. 3 will be described with reference to a new drawing.

FIG. 4 is a diagram for explaining the gear member 24. FIG. 4B shows a spring member 30 in addition to the gear member 24. The gear member 24 includes a cylindrical portion 47, a circumferential tooth portion 48, a coupling hole portion 50, a convex portion 52, and a flange portion 54.

The coupling hole portion 50 is formed inside the cylindrical portion 47 and functions as a shaft hole that is pivotally supported by the base member 34. The circumferential tooth portion 48 is formed on the outer peripheral surface of the tubular portion 47 and is supported by the flange portion 54. The convex portion 52 is formed to protrude from the back surface of the flange portion 54, and functions as a rotation stopper for the gear member 24 by being locked to the base member 34.

As shown in FIG. 4B, the spring member 30 is accommodated in the cylindrical portion 47 and biases the first rod 26 and the second rod 28 in the traveling direction via the gear member 24.

FIG. 5 is a diagram for explaining the first rod 26. In addition, the 1st rod 26 and the 2nd rod 28 are the same shapes, and description of the 2nd rod 28 is abbreviate | omitted. The first rod 26 has a distal end portion 56, an engagement hole portion 58, a step portion 59, and a linear tooth portion 60.

The front end portion 56 is located on the front end side in the traveling direction of the first rod 26 and enters and exits the lock portion of the glove box. The engagement hole 58 is formed so that the transmission part 42 of the operation member 20 can be inserted, and engages with the transmission part 42. The inner surface of the engagement hole 58 is pushed by the movement of the transmission portion 42, and the first rod 26 moves in the backward direction. The movement of the transmission part 42 is changed in the longitudinal direction (retraction direction) of the first rod 26.

The linear tooth portion 60 is a tooth portion that is positioned on the rear end side in the traveling direction of the first rod 26 and is linearly arranged. The linear tooth portion 60 meshes with the circumferential tooth portion 48 of the gear member 24 and converts the rotational motion of the gear member 24 into linear motion. The step portion 59 is formed closer to the distal end portion 56 than the linear tooth portion 60 and restricts the first rod 26 from being inserted too much into the base member 34 when inserted into the base member 34.

FIG. 6 is a perspective view of the base member 34. FIG. 7A is a rear view of the base member 34, and FIG. 7B is a side view of the base member 34. The base member 34 is formed in a box shape, accommodates the gear member 24 and the spring member 30, and supports the first rod 26 and the second rod 28.

The base member 34 includes a shaft portion 62, a first guide portion 64 a and a second guide portion 64 b (referred to as “guide portion 64” if they are not distinguished from each other), and a locking portion 66. The shaft portion 62 is located in the center of the bottom portion 61 of the base member 34 and is erected in a column shape from the bottom portion 61. The shaft portion 62 is inserted into the coupling hole portion 50 of the gear member 24 and rotatably supports the gear member 24. The tip end of the shaft portion 62 projects outward in the radial direction, and the gear member 24 can be prevented from coming off.

A pair of the first guide part 64a and the second guide part 64b are formed through the side wall of the base member 34. The guide part 64 guides the forward and backward movement of the inserted

rods

26 and 28. As shown in FIG. 7B, a step 68 is formed in the guide portion 64, and the positional deviation in the width direction of the

rods

26 and 28 is limited to suppress the release of meshing.

The locking portion 66 is an elastic piece extending from the bottom 61 or the upper wall of the base member 34, and projects to the side as shown in FIG. A slit 67 for rotating the locking portion 66 is formed around the locking portion 66 in the bottom portion 61 of the base member 34. The locking portion 66 has a recess 66 a that locks with the convex portion 52 of the gear member 24, and stops the rotation of the gear member 24. The locking portion 66 projects outward from the side surface of the base member 34 and can be operated by the user.

Return to Fig. 3. The gear member 24 and the spring member 30 are accommodated in the base member 34, the first rod 26 is inserted through the first guide portion 64a, and the second rod 28 is inserted through the second guide portion 64b. In this manner, the gear member 24, the spring member 30, the first rod 26, and the second rod 28 are integrally assembled by the base member 34, and the second subassembly is assembled. Thereby, compared with the case where it conveys to the opening-and-closing member 12 for every member, after locking device 10 is partially unitized and operation check is carried out, it can convey easily.

The first rod 26 and the second rod 28 mesh with the gear member 24, and advance and retreat in conjunction with each other. By engaging the gear member 24 and the

rods

26, 28, the

rods

26, 28 cross the advancing / retreating direction due to the circular motion of the rotor as compared with the case where the rod is fixed to the rotor used instead of the gear member 24. The displacement is suppressed, and the

rods

26 and 28 can advance and retract linearly.

By providing the guide portion 64 that guides the forward and backward movement of the

rods

26 and 28, the

rods

26 and 28 can be smoothly advanced and retracted, and the

rods

26 and 28 and the gear member 24 can be prevented from being disengaged. When the

rods

26, 28 are subjected to a load when the opening / closing member 12 is opened / closed or in a closed state when the

rods

26, 28 are subjected to a load, the guide portion 64 of the base member 34 receives the load. The occurrence of sticking can be suppressed, and the advancement and retraction of the

rods

26 and 28 can be stabilized.

FIG. 8 is a rear view of the second subassembly 70 of the locking device 10. In the second subassembly 70, the locking portion 66 of the base member 34 is locked to the convex portion 52 of the gear member 24, and the rotation of the gear member 24 is stopped. The locking portion 66 functions as a stopper structure that stops the movement of the

rods

26 and 28 against the spring member 30. This stopper structure locks the gear member 24 with the spring member 30 accumulating to restrict the progression of the

rods

26, 28, releases the lock, and biases the spring members 30 to cause the

rods

26, 28 to move. Make it progress. Thereby, the operation | work which attaches the 2nd subassembly 70 to the opening-and-closing member 12 can be made easy.

The gear member 24 is urged in the advancing direction of the

rods

26 and 28 by the spring member 30 in a state of being locked to the locking portion 66, and rotates when the locking of the locking portion 66 is released. Then, the

rods

26 and 28 are moved in the traveling direction.

FIG. 9 is a view for explaining the attachment of the locking device 10 to the opening / closing member 12. The mounting process of the locking device 10 includes a first process of fixing the mounting member 22 of the first subassembly to the mounting port 12a of the opening / closing member 12, and a base mounting of the base member 34 of the second subassembly 70 to the base of the opening / closing member 12. It has the 2nd process fixed to part 12e, and the 3rd process which cancels locking of locking part 66.

In the second step of fixing the base member 34 to the opening / closing member 12, the operator aligns the positions of the engagement hole 58 of the first rod 26 and the transmission portion 42 of the operation member 20, and transmits the transmission portion to the engagement hole 58. In a state where 42 is inserted, the base member 34 is fixed to the base mounting portion 12e.

The total length L1 in the longitudinal direction of the first rod 26 and the second rod 28 of the second subassembly 70 is shorter than the first rod 26 and the second rod 28 in the locked state shown in FIG. That is, in the free state where the gear member 24 shown in FIG. 1 is not locked by the locking portion 66, the first rod 26 and the second rod 28 are long in the longitudinal direction, and the tips of the first rod 26 and the second rod 28. It is difficult to insert the portions 56 into the first support hole portion 12c and the second support hole portion 12d, respectively.

As shown in FIG. 9, the total length L1 of the second subassembly 70 is shorter than the interval L2 between the first support hole 12c and the second support hole 12d. Therefore, the second step of fixing the base member 34 to the opening / closing member 12 can be executed without retracting the

rods

26, 28, and the third step of releasing the lock by operating the locking portion 66 after the second step. Execute. When the locking portion 66 is unlocked, the gear member 24 is urged and rotated by the spring member 30, and the first rod 26 and the second rod 28 meshing with the gear member 24 advance and the first support hole portion 12c. And it can insert in the 2nd support hole part 12d, and can complete an attachment operation | work easily.

Thus, since the base member 34 connects and holds the

rods

26 and 28 and the gear member 24, the process of attaching the lock device 10 to the opening / closing member 12 can be reduced. After the second subassembly 70 is fixed to the opening / closing member 12, the locking by the stopper structure is released and the

rods

26 and 28 are advanced so that they can be easily inserted into the first support hole 12c and the second support hole 12d. can do. Further, rattling of the

rods

26 and 28 can be suppressed by the guide portion 64 of the base member 34.

FIG. 10 is a diagram for explaining the second subassembly 170 of the second embodiment. The second subassembly 170 of the second embodiment is different in the position and shape of the stopper structure from the second subassembly 70 of the first embodiment shown in FIG.

In the second subassembly 70 of the first embodiment shown in FIG. 8, the mode in which the locking portion 66 of the base member 34 is locked to the gear member 24 to stop the progress of the

rods

26 and 28 is shown. In the second subassembly 170 of the embodiment, the locking portion 166 of the base member 134 is locked to the first rod 26 and stops the movement of the

rods

126 and 28.

The base member 134 has a claw-like locking portion 166, and the locking portion 166 projects laterally from the upper end surface of the base member 134. The locking portion 166 functions as a stopper structure that locks the first rod 126 and restricts the forward and backward movement of the

rods

126 and 28. The locking portion 166 has a claw portion 166a protruding toward the first rod 126 at the tip.

The first rod 126 has a convex portion 152 in the vicinity of the stepped portion 59, and the convex portion 152 is locked to the claw portion 166a of the locking portion 166. The convex portion 152 is formed in a protruding shape on the surface opposite to the linear tooth portion 60 of the first rod 126. The convex part 152 is configured not to pass through the guide part 64. That is, the convex portion 152 contacts the edge of the guide portion 64 and restricts the retraction of the first rod 126. The locking portion 166 is locked to the convex portion 152 and restricts the progress of the first rod 126.

After the operator fixes the base member 134 to the opening / closing member 12, the gear member 24 is rotated by the bias of the spring member 30 and the

rods

126, 28 are advanced by bending the locking portion 166 and releasing the locking. To do.

Since the

rods

126 and 28 and the gear member 24 are interlocked with each other, by providing a stopper structure for locking any one of them, the entire length of the second subassembly 170 can be kept short.

FIG. 11 is a diagram for explaining the second subassembly 270 of the third embodiment. The second subassembly 270 of the third embodiment is different in the shape of the stopper structure from the second subassembly 170 of the second embodiment shown in FIG.

The base member 234 has a locking portion 266 that protrudes laterally from the upper end surface of the base member 234, and the locking portion 266 is formed in a hole shape. The first rod 226 has a convex portion 252 in the vicinity of the stepped portion 59, and the convex portion 252 is inserted into the locking portion 266 and locked.

After the operator fixes the base member 234 to the opening / closing member 12, the gear member 24 is rotated by the bias of the spring member 30 and the

rods

226, 28 are advanced by bending the locking portion 266 and releasing the locking. To do. Thus, the shape of the latching | locking part 266 which comprises a stopper structure is not restricted to the nail | claw shape shown in FIG. 10, The hole shape may be sufficient.

FIG. 12 is a diagram for explaining the second subassembly 370 of the fourth embodiment. The second subassembly 370 of the fourth embodiment differs from the second subassembly 70 of the first embodiment shown in FIG. 8 in the position and shape of the stopper structure, and the first rod 326 and the second rod 328 are different. It has a stopper structure that locks each other.

The first rod 326 and the second rod 328 are opposed to each other on the rear end side in the traveling direction with the base member 34 interposed therebetween, and a locking portion 366 and a convex portion 352 are provided on the opposed portions. The first rod 326 has a locking portion 366 that projects toward the second rod 328, and the second rod 328 has a convex portion 352 that locks to the locking portion 366. The convex portion 352 bends in the traveling direction 72 of the second rod 28. The stopper structure of the fourth embodiment is configured so that it is difficult to release the lock because the urging force of the spring member 30 acts in the direction opposite to the direction in which the lock is released. When the first rod 326 and the second rod 328 are retracted, the locking portion 366 and the convex portion 352 are unlocked, and the first rod 326 and the second rod 328 are advanced by the spring member 30.

FIG. 13 is a diagram for explaining the second subassembly 470 of the fifth embodiment. The second subassembly 470 of the fifth embodiment is different from the second subassembly 370 of the fourth embodiment shown in FIG. 12 in that the shape of the base member 434 is different and a plurality of stopper structures are provided.

The base member 434 includes a shaft portion 62 erected from the bottom portion 61, a first guide portion 464 a erected on the upper end of the bottom portion 61, and a second guide portion 464 b erected on the lower end of the bottom portion 61. . The first guide portion 464a and the second guide portion 464b have a wall portion facing the bottom portion 61, and guide the advance and retreat of the first rod 426 and the second rod 428. The movement of the first rod 426 and the second rod 428 in the direction orthogonal to the advancing / retreating direction is limited by the first guide portion 464 a and the second guide portion 464 b and the gear member 24. Thus, the base member 434 is not limited to the box shape like the base member 34 shown in FIG. 6, and the first guide portion 464a and the second guide portion 464b are hole-like like the guide portion 64 shown in FIG. Not limited to.

The first rod 426 includes a first locking portion 466a that protrudes toward the second rod 428 and a first convex portion 452a. The first locking portion 466a is located on the front end side in the traveling direction of the first rod 426 from the base member 434, and the first convex portion 452a is located on the rear end side in the traveling direction of the first rod 426 from the base member 434.

The second rod 428 has a second locking portion 466b that protrudes toward the first rod 426 and locks to the first protruding portion 452a, and a second protruding portion 452b that is locked to the first locking portion 466a. . The second locking portion 466b is located on the front end side in the traveling direction of the second rod 428 from the base member 434, and the second convex portion 452b is located on the rear end side in the traveling direction of the second rod 428 from the base member 434.

When the first rod 426 and the second rod 428 are retracted, the locking of the first locking portion 466a and the second convex portion 452b and the locking of the second locking portion 466b and the first convex portion 452a are released. Then, the first rod 426 and the second rod 428 are advanced by the spring member 30.

The present invention is not limited to the above-described embodiments, and various modifications such as design changes can be added to the embodiments based on the knowledge of those skilled in the art. Embodiments described may also be included within the scope of the present invention.

In the locking device 10 of the embodiment, the mode in which the first rod 26 and the second rod 28 are engaged with the hole-shaped lock portion of the fixing member is shown, but the present invention is not limited to this mode. For example, the first rod 26 and the second rod 28 may be engaged with the protruding portion or the recessed portion of the fixing member, or may be engaged with the edge of the wall of the fixing member. That is, it is sufficient if the fixing member has a surface for engaging the first rod 26 and the second rod 28.

10 locking device, 12 opening / closing member, 12a mounting port, 12b recess, 12c first support hole, 12d second support hole, 12e base mounting unit, 20 operation member, 22 mounting member, 24 gear member, 26 1st Rod, 28, 2nd rod, 30 spring member, 32 coil spring, 34 base member, 36 cushion, 40 shaft hole, 42 transmission section, 44 shaft support section, 46 cushion holding section, 47 cylindrical section, 48 circumferential tooth section, 50 coupling hole part, 52 convex part, 54 flange part, 56 tip part, 58 engaging hole part, 59 step part, 60 linear tooth part, 61 bottom part, 62 shaft part, 64a first guide part, 64b second guide Part, 66 locking part, 68 step, 70 second Bed assembly.

Claims

A locking device capable of holding an openable / closable member attached to an opening of a fixed member in a locked state,
An operating member that is rotatably supported;
A pair of rods that advance and retract to the locking portion of the fixing member in conjunction with the operation of the operating member;
A base member fixed to the opening and closing member;
A gear member rotatably supported by the base member,
The pair of rods meshes with the gear member and advances and retracts in conjunction with each other.
The base member has a pair of guide portions that respectively guide advance and retreat of the pair of rods.
A spring member for biasing the pair of rods in the traveling direction;
The locking device according to claim 1, further comprising: a stopper structure that stops the pair of rods from advancing against the bias of the spring member.
The stopper structure has a locking portion that locks the gear member or the rod and restricts the advancement and retraction of the rod,
The locking device according to claim 2, wherein when the locking portion is released, the pair of rods are advanced by the biasing of the spring member.
The locking device according to any one of claims 1 to 3, wherein the guide portion is formed in a hole shape and is inserted through the rod.