JPH0972324A - Lock device for box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly keep locking between a locking frame and a lock arm which are formed on a box body and a cover body in a locked state, and on the other hand, to easily release the locked state in case of the releasing of locking. SOLUTION: A locking frame 11 being an inverted L-shape in section is protrusively provided from the outer face of a side wall 10a of a box body 10, and a lock arm through hole 11c is formed in the central part of the upper lateral frame part 11a of the locking frame, and a jig inserting hole 16 is drilled on the side wall of the box body opposite to a lock arm through hole, and on the other hand, a lock arm 13 to be inserted in the lock arm through hole is protrusively provided on a cover body 12, and a jig inserting groove 13b opened at its lower end is formed in the central part of the lock arm. A lock pawl 13c to lock on the lower end face of the locking frame is protrusively provided on the outer faces of both side parts divided into a forked form by the jig inserting groove, and in the case of releasing a lock, a lock releasing jig is inserted from the lower end face of the locking frame to a jig inserting hole through the jig inserting groove of the lock arm to bend the lower end of the locking frame in the lock releasing direction for releasing locking between the locking frame and a lock pawl.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock structure for a box such as a protector for a wire harness or an electric connection box, which comprises a box body having an upper opening and a lid for closing the opening of the box body. The operation is performed easily and surely.

[0002]

2. Description of the Related Art Conventionally, as a box locking device including a box body having an upper surface opening and a lid body for closing the opening of the box body, such as a protector for a wire harness or an electric connection box, for example, an actual open box 5- In Japanese Patent No. 38410, the one shown in FIG. 12 is provided.

In the above box, a plurality of groove portions 2b are provided in the vertical direction on the inner surface of the outer frame portion 2a of the locking frame 2 which integrally projects from the side wall 1a of the box body 1 in a U-shaped cross section. Press release members 2c and 2c are integrally provided on both sides of the protrusion 2 so as to be continuous with the outer frame portion 2a. The locking frame 2 is in a locked state in which a lock arm 4 integrally protruding from the lid 3 is passed through an internal through hole 2f and a lock claw 4a is locked to the lower end surface of the outer frame portion 2a. The locked state can be released by pressing the pressing release members 2c, 2c with fingertips.

Further, in Japanese Utility Model Laid-Open No. 5-38410, the pressure releasing member 2c is replaced with the one shown in FIG.
As shown in (B), a configuration is provided in which a pullout releasing member 2c ′ protruding outward is provided at the center of the outer frame portion 2a of the locking frame 2, and the locked state is released by pulling the pullout releasing member 2c ′. We also provide a locking device.

[0005]

However, in the locking device of the first conventional example shown in FIG. 12, the locking frame 2 forms a closed cross section with the box side wall 1a, as shown in FIG. The continuous portions A and B of the horizontal frame portions 2e and 2e of the frame 2 and the outer frame portion 2a, and the continuous portions C and D of the horizontal frame portion 2e and the side wall 1a of the box body 1 have high rigidity, and the pressing release is performed. Members 2c, 2
Even if c is pressed in the direction of the arrow, the outer frame portion 2a is unlikely to be distorted outward. On the contrary, before the outer frame portion 2a bends outward, as shown in FIG. 15, the side wall 1a of the box body 1 bends inward together with the locking frame 2 as shown by the dotted line in the figure, and is locked. It is often impossible to cancel.

Further, even if the outer frame portion 2a of the locking frame 2 can be bent outward by pressing the pressure releasing members 2c, 2c, the horizontal frame portion 2e can be moved together as shown in FIG. There is a problem in that the horizontal frame portions 2e, 2e are bent inward and the lock arm 4 of the lid body 3 penetrated into the locking frame 2 is pressed down, and the lock arm 4 cannot be easily pulled out from the locking frame 2. is there.

On the other hand, the second shown in FIGS. 13 (A) and 13 (B).
In the lock device of the third conventional example, since the pull-out releasing member 2c ′ is projected outward from the outer frame portion 2a of the locking frame 2, the box becomes large, the box installation space becomes large, and the mounting position There is a problem that is limited. Further, similarly to the first conventional example, the outer frame portion 2a is bent outward, and at the same time, the horizontal frame portions 2e, 2e are also bent inward, so that the lock arm 4 penetrating the inside of the locking frame 2 can be easily pulled out. There is no problem.

The present invention has been made in view of the above problems, and a locking frame provided on a box body that constitutes a box such as a protector for a wire harness of an automobile or an electric connection box,
An object of the present invention is to provide a lock device for a box that securely holds the lock with a lock arm provided on a lid in a locked state, and can easily release the lock when unlocked.

[0009]

To achieve the above object, the present invention provides a lock device for a box body having an upper opening and a lid body for closing the opening of the box body according to claim 1. A locking frame having an inverted L-shaped cross section is provided so as to project from the outer surface of the side wall of the box body, and a lock arm through hole is formed in the center of the upper lateral frame portion of the locking frame and faces the lock arm through hole. A jig insertion hole is formed in the side wall of the box body, while a lock arm to be inserted into the lock arm through hole is projectingly provided in the lid body, and a jig insertion groove with a lower end opening is formed in the central portion of the lock arm. A lock claw that engages with the lower end surface of the locking frame is provided on the outer surface of both sides divided into two parts by the jig insertion groove, and when unlocking, lock from the lower end surface of the locking frame. Insert the lock release jig into the jig insertion hole through the jig insertion groove of the arm, and The flexed in the lock releasing direction is to provide a locking device of the box that has a configuration for solving the engagement of the locking pawl.

According to the lock device of the first aspect, when unlocking, the unlocking jig is moved from the lower end opening of the locking frame to the jig insertion groove of the lock arm to the jig insertion hole of the side wall of the box. insert. When the lower surface of the tip of the lock release jig comes into contact with the outside of the lower end of the jig insertion hole, the upper surface of the jig comes into contact with the lower end surface of the locking frame and moves the locking frame outward in the unlocking direction. Bend. Moreover, when the tip end side of the jig is outward with the lower end contact portion of the jig insertion hole as a fulcrum, the locking frame is forcibly bent outward. When the locking frame bends outward in this manner, the locking with the lock claw of the lock arm is released. At the time of this unlocking operation, the locking frame has an inverted L-shaped cross section, and only the lateral frame portion at the upper end is continuous with the side wall of the box, and the side wall of the box is not bent because the side wall of the box is not closed. Without locking, only the locking frame can be bent in the unlocking direction.

According to a second aspect of the present invention, there is provided a lock device for a box body having an upper surface opening and a lid body for closing the opening of the box body, wherein the box body has an L-shaped cross section taken from an inner surface of a side wall of the box body. Of the locking frame, a lock arm through hole is formed in the center of the upper horizontal frame portion of the locking frame, and a jig insertion hole is formed in the side wall of the box facing the lock arm through hole. On the other hand, a lock arm to be inserted into the lock arm through hole is projectingly provided on the lid body, and a jig insertion groove having a lower end opening is formed at a central portion of the lock arm. Lock claws that engage with the lower end surface of the above-mentioned locking frame are provided on the inner surfaces of both sides divided into two parts.When unlocking, unlock through the jig insertion hole of the box body through the jig insertion groove Insert the jig and bend the vertical frame of the locking frame in the unlocking direction to release the locking with the locking claw. There is provided a locking device box has a configuration.

According to the lock device of the second aspect, the lock releasing jig is inserted through the jig inserting hole formed in the side wall of the box located outside, and is passed through the jig inserting groove of the lock arm. And its tip abuts on the inner surface of the vertical frame portion of the locking frame.
When the lock release jig is further pressed from this state, the inner surface of the locking frame having an inverted L-shaped cross section is bent inward in the lock releasing direction, and the locking between the locking frame and the lock claw is released.

Below the locking frame to which the locking claws are locked, a lock protection portion is provided so as to protrude by the size of the locking claws to be locked. (Claim 3) According to the lock device having the above structure, in the locked state, the lock claw of the lock arm is positioned between the locking frame and the lock protection portion to protect the lock claw. Interference can be prevented, and unlocking between the lower end surface of the locking frame and the lock claw can be prevented.

The box comprises a wire harness protector or an electrical junction box. (Claim 4)

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail based on the embodiments shown in the drawings. As shown in FIG. 1, a lock device for a box according to a first embodiment of the present invention includes a locking frame 11 having an inverted L-shaped cross section that integrally projects from an outer surface of a side wall 10a of a resin box body 10, and a storage box. A lock arm 13 that integrally projects from a lid 12 made of resin that closes the opening 10b of the body 10 is provided, and these locked states are released by a lock release jig 15 shown in FIG.

As shown in FIGS. 1 and 2, the locking frame 11 includes an upper lateral frame portion 11a integrally protruding outward from an upper end of a side wall 10a of the box body 10 and an outer side of the lateral frame portion 11a. It is composed of a vertical frame portion 11b protruding further downward.

The horizontal frame portion 11a has a lock arm through hole 11 into which the lock arm 13 is inserted in the central portion thereof.
c is provided, and the lock arm 13 is housed and held in the insertion portion 14 formed between the side wall 10a of the box body 10 and the vertical frame portion 11b. In the vertical frame portion 11b, the lock arm through hole 11c is provided so as to be inclined downward from the outside toward the insertion portion 14 side.
11d which is continuous with the lock arm 13 is provided.
The insertion workability is improved.

Further, the side wall 10a of the box body 10 is provided with a rectangular jig insertion hole 16 facing the lock arm through hole 11c. The lower end position of the jig insertion hole 16 is set at substantially the same position as the lower end position of the vertical frame portion 11b, and the jig insertion hole 16 communicates with the substantially central position of the insertion portion 14.

Further, on the outer surface of the side wall 10a of the box, lock protection portions 17 having an L-shape in a top view are provided at both lower positions of the locking frame 11.
Are projected in a pair. These lock protection parts 17 are composed of side frame parts 17a and 17a protruding from the outer surface of the side wall, and inwardly bent outer frame parts 17b and 17b opposed to each other from the tips of the side frame parts 17a and 17a. A space is provided between the upper end surfaces of the outer frame portions 17b and 17b and the lower end surface of the vertical frame portion 11b of the locking frame 11 by a size of a lock claw 13c of the lock arm 13 described later. Further, the outer frame portions 17b, 17b have a space for inserting the lock releasing jig 15 between their inner end surfaces.

The lock arm 13 includes the locking frame 11
The lower end portion 13a is housed in the lock protection portion 17 of the box body 10 in the locked state, the lower end portion 13a protruding downward from the outer end edge of the lid body 12 in correspondence with the position. The length. The lock arm 13 is provided with a jig insertion groove 13b having a lower end opening at a central position facing the jig insertion hole 16. Further, lock claws 13c that are locked to the lower end surface of the vertical frame portion 11b of the locking frame 11 are provided on the outer surfaces of both side parts that are bifurcated by the jig insertion groove 13b.

The lock claw 13c is projected so as to be located between the locking frame 11 and the lock protection part 17, and the lower part of the lock claw 13c is the outer surface of the side wall of the box and the lock protection part 17. It is supposed to be accommodated in between.

As shown in FIG. 3, the lock releasing jig 15 is a rod having a rectangular column shape inserted into the jig inserting hole 16, and the top and bottom surfaces of the releasing insertion portion 15a at the tip thereof are tapered. The inclined surface 15b which inclines is provided. Further, the lock releasing jig 15 is provided with stopper portions 15c, 15c for suppressing the insertion length from both sides with a required gap from the inclined surface 15b.
Is provided.

The upper opening 10b of the box 10 is covered with the lid 12
In the case of closing with, the lock arm 13 protruding from the lid body 12 is first inserted into the lock arm through hole 11c of the locking frame 11 of the box body 10. At this time, the vertical frame portion 11 of the locking frame 11
In b, the inclined surface 1 communicating with the lock arm through hole 11c
Since 5b is provided and the opening on the insertion side is made large, it can be easily inserted.

When the lock arm 13 is inserted, the lock claw 13c slides on the inner surface of the vertical frame portion 11b of the locking frame 11 and descends while bending the vertical frame portion 11b outward to move the vertical frame portion. The lock claw 13c is locked to the lower end surface of 11b. In this way, the locking frame 11 has an inverted L-shaped cross section, and the upper horizontal frame portion 1
Since only 1a is continuous with the side wall 10a of the box body 10, the vertical frame portion 11b can be flexed outward to be easily locked.

In the locked state, the lock claw 13c of the lock arm 13 is provided between the locking frame 11 and the lock protection portion 17.
Is located to protect the lock claw 13c. Therefore, in this state, it is possible to reliably prevent the lock from being released due to the interference of other members from the outside.

On the other hand, when releasing the locked state,
As shown in FIG. 4, the lock release jig 15 is used to lock the lock arm 13 from the lower end surface of the vertical frame portion 11b of the locking frame 11.
Side wall 10a of the box body 10 through the jig insertion groove 13b
It is inserted toward the jig insertion hole 16 drilled in. This time,
The lock releasing jig 15 can be easily inserted because the inclined insertion surfaces 15b are provided above and below the tip of the insertion portion 15a for releasing.

The insertion portion 1 for releasing the lock releasing jig 15
When 5a is inserted into the jig insertion hole 16 of the box body 10, the lower inclined surface 15b of the unlocking jig 15 contacts the outside of the lower end of the jig insertion hole 16. Using the contact point P as a fulcrum, the upper inclined surface 15b is connected to the vertical frame portion 11 of the locking frame 11.
b is brought into contact with the lower end surface, and the lower end of the vertical frame portion 11b is pushed outward so as to be bent outward in the unlocking direction. At this time, as described above, the locking frame 11 has the upper horizontal frame portion 11a.
Since only the side wall 10a of the box body 10 is continuous with the side wall 10a, the side wall 10a does not bend and the vertical frame portion 1 of the locking frame 11 does not bend.
Only 1b can be deflected outwards. In this state,
The lock between the lock claw 13c of the lock arm 13 and the lock frame 11 is released. With the lock released, the lid 12 is pulled out upward and the lid 12 is removed from the box 10.

As described above, the lock device according to the present invention requires the separate unlocking jig 15, but the jig 15 does not press the lock arm 13 and engages with the lock claw 13c of the lock arm 13. Only the vertical frame portion 11b of the locking frame 11 to be stopped can be bent outward to reliably unlock. Further, since the stopper portions 15c, 15c suppress the insertion amount of the unlocking jig 15,
It is possible to prevent the locking frame 11 from being bent more than necessary. Further, unlike the pull-out releasing members 2c, 2c 'shown in the lock devices of the second and third conventional examples, since they are not projected outward, the mounting position of the box forming the lock device is not limited. .

Further, when the above lock device is adopted in a protector for a wire harness of an automobile or a box such as an electric connection box, the lid can be easily removed from the box during maintenance of the automobile and at the time of attachment to the automobile. It is possible to hold the locked state with certainty.

FIG. 5 shows a box locking device according to the second embodiment, which has substantially the same structure as the locking device according to the first embodiment.
1 is different from that of FIG. 1 in that it projects from the inner surface side of the side wall 10 a of the box 10. Further, the lock claws 13c are provided so as to project from the inner surfaces of both sides of the lock arm 13 which are split into two.

In the lock device according to the second embodiment, when the locked state is released, as shown in FIG. 6, the jig insertion hole 1 is formed in the side wall 10a of the box body 10 located outside.
Insert the lock release jig 15 from 6. As a result, the unlocking insertion portion 15a of the unlocking jig 15 passes through the jig insertion groove 13b of the lock arm 13 and contacts the inner surface of the vertical frame portion 11b of the locking frame 11.

When the unlocking jig 15 is further pressed from the above state, the vertical frame portion 11b is bent inward in the unlocking direction, and the stopper portion 15c is in contact with the outer surface of the side wall 10a as shown in the figure. Then, the engagement between the vertical frame portion 11b and the lock claw 13c is securely released, and the lid body 1
2 can be removed.

FIG. 7 shows a lock device for a box according to the third embodiment. The lock device is a horizontal frame portion 11a of a locking frame 11.
A triangular rib 11e that is inclined downward from the side of the vertical frame portion 11b to the side wall 10a of the box body 10 is provided on the lower surface of the horizontal frame portion 11a to increase the rigidity of the horizontal frame portion 11a so that only the vertical frame portion 11b is bent. Further, in the third embodiment, the locked state is released by using the lock release jig 20 shown in FIG.

The unlocking jig 20 is a rod having a rectangular column shape which is thinner in the vertical direction than the jig insertion hole 16 formed in the side wall 10a of the box body 10, and has the same tip as the first embodiment. Stopper portions 20c, 20c are provided at a required interval from the releasing insertion portion 20a. Further, a claw-shaped pressing portion 20d is provided on the upper surface of the distal end of the releasing insertion portion 20a. The height from the upper end position to the lower end position of the pressing portion 20d is substantially the same as the height of the jig insertion hole 16.

When the lock device having the above structure is formed on the outer surface side of the box and the locked state is released by the lock release jig 20, as shown in FIG. 9, as in the first embodiment, the locking frame is provided. The insertion portion 20a for releasing the lock releasing jig 20 is inserted from the lower end surface of the vertical frame portion 11b of 11.

When the unlocking insertion portion 20a of the unlocking jig 20 is positioned inside the jig insertion hole 16 of the side wall 10a by the above insertion, the unlocking jig 2 is moved as shown by the arrow in the figure.
0 is operated toward the side wall 10a side. As a result, the unlocking jig 20 presses the inner surface of the vertical frame portion 11b of the locking frame 11 outward by the pressing portion 20d with the contact point P of the jig insertion hole 16 as a fulcrum, and the vertical frame portion 11b. Is outwardly bent to release the lock with the lock claw 13c.

FIG. 10 shows a case where the lock device is formed on the inner surface side of the box. When the locked state is released by the lock release jig 20, the box body is inserted from the outside of the box as in the second embodiment. The lock release jig 20 is inserted into the jig insertion hole 16 of the lock release jig 20 through the release insertion portion 20a.
As a result, as in the second embodiment, the lock arm 13
The inner surface of the vertical frame portion 11b of the locking frame 11 is pushed outward by the tip of the pressing portion 20d of the releasing insertion portion 20a through the jig inserting groove 13b to release the locking with the lock claw 13c. .

The box device of the present invention is not limited to the above construction. For example, the jig insertion groove 13b shown in the first to third embodiments is formed in the center of the lock arm 13 as a lower end opening. However, as shown in FIG.
It may be formed on both sides of the lock arm 13. Further, as shown in FIG. 11B, it may be formed only on one side of the lock arm 13. In these cases, the jig insertion hole 16 is also formed at the position of the corresponding side wall 10a of the box body 10, and
By changing the protruding lengths of the outer frame portions 17b, 17b of the lock protection portion 17, the lock releasing jig 15 formed between them is changed.
The position of the space for inserting is also formed correspondingly.

[0039]

As is apparent from the above description, in the lock device for a box according to the first or second aspect of the present invention, the lock release jig is used to fix the lock arm from the lower end surface of the lock frame. By inserting it into the jig insertion hole on the side wall of the box through the tool insertion groove, only the locking frame is bent in the unlocking direction and locked with the lock claw without applying any load to the lock arm. It can be easily solved.

The locking frame is composed of a horizontal frame portion projecting from the side wall of the box body and a vertical frame portion projecting from the end of the horizontal frame portion, and both side surfaces of the vertical frame portion are continuous with the side wall. Since the lock is not performed, only the outer frame portion can be easily bent at the time of unlocking to unlock the lock claw. Furthermore, since the locking device of the present invention does not have an outwardly projecting member such as the pull-out releasing member shown in the locking devices of the second and third conventional examples, the mounting position of the box forming the locking device is There is no limit.

In the box locking device according to a third aspect of the present invention, the lock protection portion is provided below the locking frame, and in the locked state, the lock claw protruding from the lock arm is positioned between them. Therefore, it is possible to reliably prevent the lower end surface of the locking frame and the locking claw from being disengaged from being brought into contact with another member from the outside in the locked state.

According to a fourth aspect of the present invention, the lock device is used for a protector for a wire harness of an automobile or a box such as an electric connection box, so that the lid can be easily removed from the box at the time of maintenance of the automobile. In the attached state to the box body, the locked state of the box body and the lid body can be securely held.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a lock device for a box according to a first embodiment of the present invention.

FIG. 2A is a sectional view showing a state before the locking device is locked, and FIG. 2B is a sectional view showing a locked state.

FIG. 3 is a perspective view showing a lock release jig of the first embodiment.

FIG. 4 is a cross-sectional view showing a state in which a lock is released.

FIG. 5 is an exploded perspective view showing a lock device for a box according to a second embodiment.

FIG. 6 is a cross-sectional view showing a state in which the lock device of the second embodiment is unlocked.

FIG. 7 is an exploded perspective view showing a lock device for a box according to a third embodiment.

FIG. 8 is a perspective view showing a lock release jig of a third embodiment.

9 is a cross-sectional view showing a state in which the lock device of the third embodiment formed on the outer surface side of the box is unlocked by the lock release jig shown in FIG.

FIG. 10 is a cross-sectional view showing a state where the lock device of the third embodiment formed on the inner surface side of the box is unlocked by the lock release jig shown in FIG.

11A and 11B are perspective views showing a modification of the lock device.

FIG. 12 is an exploded perspective view showing a lock device of a first conventional example.

13A is a sectional view showing a locking device of a second conventional example, and FIG. 13B is a sectional view showing a locking device of a third conventional example.

FIG. 14 is a cross-sectional view showing a locked state of a lock device of a first conventional example.

FIG. 15 is a cross-sectional view showing a problem of the lock device of the first conventional example.

FIG. 16 is a cross-sectional view showing another problem of the first conventional example.

[Explanation of symbols]

 10 Box 10a Side Wall 10b Opening 11 Locking Frame 12 Lid 13 Lock Arm 13b Jig Insert Groove 13c Lock Claw 15, 20 Lock Release Jig 16 Jig Insert Hole

Claims (4)

[Claims] 1. A locking device for a box body having an upper opening and a lid body for closing the opening of the box body, wherein a locking frame having an inverted L-shaped cross section is projected from an outer surface of a side wall of the box body.
A lock arm through hole is formed in the center of the upper lateral frame portion of the locking frame, and a jig insertion hole is formed in the side wall of the box body facing the lock arm through hole, while the above-mentioned lid body is provided with A lock arm to be inserted into the lock arm through hole is provided in a protruding manner, and a jig insertion groove with a lower end opening is formed in the central portion of the lock arm, and the outer surface of both sides divided into two by the jig insertion groove. A lock claw that locks on the lower end surface of the locking frame is projected, and when unlocking, the lock release jig is inserted from the lower end surface of the locking frame through the jig insertion groove of the lock arm into the jig insertion hole. A box locking device configured to be inserted to bend the lower end of the locking frame in the unlocking direction to unlock the locking claw. 2. A locking device for a box body having an upper surface opening and a lid body for closing the opening of the box body, wherein a locking frame having an inverted L-shaped cross section is projected from an inner surface of a side wall of the box body,
A lock arm through hole is formed in the center of the upper lateral frame portion of the locking frame, and a jig insertion hole is formed in the side wall of the box body facing the lock arm through hole, while the above-mentioned lid body is provided with A lock arm to be inserted into the lock arm through hole is provided in a protruding manner, and a jig insertion groove at the lower end opening is formed in the central portion of the lock arm, and the inner surface of both sides divided into two by the jig insertion groove. A lock claw that locks is provided on the lower end surface of the lock frame.When unlocking, insert the lock release jig through the jig insertion groove of the lock arm through the jig insertion hole of the box to lock. A box locking device configured to bend the frame in the unlocking direction to unlock the lock claw. 3. The lock protection portion is provided below the locking frame to which the lock claw is locked, and a lock protection portion is provided so as to protrude by the dimension of the lock claw to be locked. Box locking device. 4. The box according to claim 1, wherein the box comprises a protector for a wire harness or an electric connection box.
The lock device for a box according to any one of 1.