JPH0633174Y2 - Latch device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a locking device for locking and locking a lid member or the like that is guided and movable along both inner edges of a frame.

[Conventional technology]

BACKGROUND ART Conventionally, as a lid member for closing an opening formed in a storage box or the like, a plate-shaped lid member and a roll-shaped or bellows-shaped lid member that are guided and movable along both inner edges of a frame of the opening are known. Has been. As a latching device for latching such a lid member to the frame when the opening is closed, various devices such as a latch lock, a sickle lock, an insertion lock, a latch, a bar, a ball or a roller catch are used.

[Problems to be solved by the invention] However, in the above-mentioned cases, operability is poor due to the need for troublesome operation and strong force when locking or unlocking,
Many of them were complicated and expensive. In particular, in the case where the lid member is urged in the opening direction to be automatically unlocked by a timer or the like and opened, one having a small operation force when unlocking is desired.

Therefore, an object of the present invention is to provide a latching device that has a simple structure and can be locked and unlocked with a light operating force.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention relates to a latching device for latching a lid member, which is guided and movable along both inner edges of a frame, to the frame when closed, in which the entire length of the leading edge of the lid member is provided. A tubular holding portion having an opening formed in the middle thereof, and the tubular holding portion is divided into substantially the same length as the tubular holding portion at least at a position facing the opening, both ends and the divided portion. A lock member having a rolling member disposed at the tip of the portion is movably accommodated, and at the end of the frame facing the lid member, when the lid member is closed, the lock member is opened from the opening of the tubular holding portion. Locking claws that enter between both rolling members of the divided portion and push the locking member to project the rolling members at both ends of the locking member from both ends of the tubular holding member are rotatably provided, At the positions corresponding to both ends of the cylindrical holding portion, It is characterized in that the formation of the engagement recess for engaging the rolling members projecting from said tubular retaining member during closure member.

[Action]

Therefore, when the lid member is moved to the closed position, the lock claws provided on the frame enter the split portion of the lock member to expand the split portion of the lock member, and the rolling members at both ends of the lock member are tubular. The lid member is held at the closed position by projecting from both ends of the holding portion and engaging with the engaging concave portion. Further, when unlocking, when the lock claw is rotated in the direction of withdrawing from the split portion of the lock member, the pressing force that causes the lock member to project from both ends of the tubular holding member disappears, so the lid member is opened in the opening direction. When moved, the lock member is pushed into the tubular holding member by the side wall of the engagement recess of the frame, so that the engagement between the both ends of the lock member and the engagement recess is released, and the lid member is opened. Can be moved to.

〔Example〕

An embodiment in which the latching device of the present invention is applied to an automatic feeder will be described below with reference to the drawings.

The automatic feeder 1 has an opening 4 formed in an upper portion of a feeding box 3 housed in the main body 2, and the opening 4 is covered with a lid member 5 so as to be openable and closable. The lid member 5 includes frames 6a, 6 on both sides of the opening 4.
Guided along a, the base end portion is formed of a thin metal plate wound around the winding shaft 7, and the elastic force of the lid member 5 itself or the spring provided on the winding shaft 7 It is biased in the opening direction by biasing means or the like. Then, at the time of use, the lid member 5 is locked by the latching device 8 and fixed at the closed position, and the latching device 8 is unlocked after a predetermined time by the timer mechanism 9 provided in the main body 2 to remove the lid member 5. It is formed so as to be opened and to feed the food and water in the main body 2 to the pet.

The latching device 8 that closes and locks the lid member 5 includes a handle portion 10 that is fixed over substantially the entire length of the tip edge portion of the lid member 5.
It is provided in the part. The handle portion 10 is formed of a hollow member to form a cylindrical holding portion 11 of the latch device 8, and a substantially middle portion in the longitudinal direction is cut out to form an opening portion 12.
Are formed. A lock member 13 having substantially the same length as the entire length of the tubular holding portion 11 is movably accommodated in the tubular holding portion 11. The lock member 13 has the opening 1
It is divided at a position facing 2, and rolling members 14a, 14b such as balls are arranged at both ends and the tip of the divided portion.

On the other hand, a frame 6b facing the lid member 5 of the frame 6
Lock claws 15 are provided on the frames 6a, 6 on both sides.
Engagement recesses 16 and 16 are formed in a.

The lock claw 15 is provided in the opening 12 of the tubular holding portion 11.
Corresponding to the above, it is provided at a substantially middle portion of the frame 6b. The lock claw 15 has a substantially L-shaped one arm as an operating portion 15.
and a shape in which the other arm is the acting portion 15b, and the central portion of the actuating portion 15a is rotatable on a shaft 18 provided on an upper portion of a holding substrate 17 which is vertically erected on the bottom plate in the main body 2. 3 and is urged in the clockwise direction in FIG. 3 by a coil spring 19 provided on the shaft 18, and the inner surface 15c of the acting portion 15b is opposed to the wall surface 17 of the holding substrate 17.
By making contact with a, the clockwise rotation in FIG. 3 is restricted, and the operating portion 15a projects to the lid member 5 side orthogonal to the holding substrate 17. The actuating portion 15a of the lock pawl 15 has both side surfaces formed in parallel with each other, and
The front side and the upper side facing the lid member 5 are connected by oblique sides, and the outer edges of these sides are chamfered to form a wedge shape.
When the lid member 5 is closed, the actuating portion 15a of the lock claw 15 extends from the opening 12 of the tubular holding portion 11 to the rolling members 14a, 1 of the split portion of the lock member 13.
4a, and the divided portion of the lock member 13 is opened.
As a result, the divided lock member 13 is attached to the cylindrical holding portion 1.
The rolling members 14b, 14b at both ends thereof move in a direction away from each other within the cylindrical holding member 11 and project from both ends of the tubular holding member 11.

Further, the engaging recesses 16 and 16 have the lid member 5 as described above.
Is formed at a position where the rolling members 14b, 14b projecting from both ends of the tubular holding portion 11 are fitted when closed. The engagement recesses 16 and 16 are formed to have a size that allows the rolling members 14b and 14b protruding by the lock claw 15 to be engaged with the rolling members 14b and 14b.
Is formed with a depth smaller than the radius of. These relationships are as follows, where t is the width of the lock claw 15, r is the radius of the rolling member 14b, and d is the depth (effective depth) of the engaging recess 15.
There is a relationship of (t / 2) ≦ d <r (see FIG. 5).

In the latching device 8 thus formed, when the lid member 5 is moved to the closed position, the lock claw 15 enters the split portion of the lock member 13 from the opening 12 of the tubular holding portion 11 to lock the lock member. 13 is expanded and rolling members 14b, 1 at both ends
4b project from both ends of the tubular holding portion 11 to engage the engaging recess 1
6 and 16 are engaged to close and lock the lid member 5. At this time of locking and locking, since the operating portion 15a of the lock claw 15 is sandwiched between the divided portions of the lock member 13, the lock member 13
Even if both ends are pressed from the outside, the lock member 13 does not return to the inside of the cylindrical holding portion 11, the engagement state between the lock member 13 and the engagement concave portion 16 is maintained, and the locked state is reliably retained.

The opening of the lid member 5 closed as described above is performed by the timer mechanism 9 provided in the main body 2. The timer mechanism 9 includes a timepiece mechanical section 20, an intermediate gear 22 meshed with a rotating gear 21 of the timepiece mechanical section 20, a clutch gear 23 meshed with the intermediate gear 22, and a coaxial gear coaxial with the clutch gear 23. Is provided in the clutch gear 24 at the clutch portion 24.
3 and a cam plate 25 connected to the clutch plate 23. The clutch gear 23 is rotatably loosely fitted to a rotary shaft 26 rotatably provided on the holding base plate 17, and the cam plate 25 is a rotary shaft 26.
Is stuck to. The rotary shaft 26 of the cam plate 25 has one end penetrating the side wall of the main body 2 and an operation knob 27 fixed to the outer end thereof. The operation knob 27 is provided with a time scale 28 so that the time until unlocking can be set. In addition, the rotary shaft 26
A coil spring 29 is disposed on the inner end side of the cam plate 25 to urge the cam plate 25 toward the clutch gear 23 side. The operation time is set by the timer mechanism 9 by setting the operation knob 27.
Is performed by releasing the engagement of the clutch portion 24, rotating the operation knob 27, and moving the cam portion 25a formed on the outer periphery of the cam plate 25 by a predetermined angle.

In the timer mechanism 9, the cam plate 25 is rotated clockwise in FIG. 4 by the rotation of the timepiece mechanical unit 20, and the cam portion 25a of the cam plate 25 is actuated by the acting portion 15 of the lock pawl 15.
The lock claw 15 is rotated counterclockwise in FIG. 3 by coming into contact with the tip portion 15d of b and pushing up the action portion 15b. By this counterclockwise rotation, the lock claw 15
The operating portion 15a moves downward in FIG. 3 to be disengaged from between the divided portions of the lock member 13, so that the lock member 13 can be moved to the inner side of the tubular holding portion 11. At this time, since the lid member 5 is biased in the opening direction, that is, the frames 6a, 6a
Since the side wall of the engaging recess 16 of the lock member pushes the rolling members 14b, 14b at both ends of the lock member 13 inward,
3 moves into the cylindrical holding portion 11. As a result, the engagement between the lock member 13 and the engagement recess 16 is released, and the lid member 5 moves in the opening direction to open the opening.

As described above, the latching device 8 of the present invention can be easily locked and unlocked by inserting and removing the lock claw 15 into and from the divided portion of the lock member 13. At this time, the lock member 13
Since rolling members 14a and 14b such as balls are arranged at both ends of the lock member and at the ends of the divided portions, the lock claw 15 is inserted into and removed from the divided portion of the lock member 13, and both end portions of the lock member 13 and the engaging recesses 16 are formed. Can be engaged and disengaged smoothly. In particular, since the operating force at the time of unlocking can be reduced, it can be unlocked by the timepiece mechanism 20 having a small rotational torque as in the above embodiment, the timepiece mechanism 20 does not require a large torque motor, etc. One small dry cell can sustain long-term operation.

Further, the rolling members 14b, 14b at both ends of the lock member 13
When the lid member 5 is opened and closed, the lid member 5 is brought into contact with the frames 6a, 6a on both sides to rotate, so that the lid member 5 can be opened and closed smoothly. Further, as shown in FIG. 6, the lock member 13 has a large number of rolling members 1 over the entire length of the tubular holding portion 11.
It is also possible to dispose and form 4, 14 and a roller-shaped member can be used as the rolling member. Further, the tubular holding portion 11 that houses the lock member 13 does not have to be a complete tubular shape, and may be formed in a C-shaped channel shape.

In FIG. 3, reference numeral 30 is a bag-shaped refrigerant that cools the inside of the feeder to maintain the freshness of the food.

Further, the latching device of the present invention can be applied as a locking device for other lid members, windows, doors, etc., and the lock claw can be operated by a manual operation such as a push button.
The opening operation can be performed manually without applying a biasing force to the lid member in the opening direction.

[Effect of device]

As described above, according to the present invention, the lock claw is inserted into the divided portion of the lock member dividedly housed in the cylindrical holding portion to expand and lock the lock member. It has a small operating force and can be locked securely with a simple operation. In particular, since the operating force at the time of unlocking can be reduced, it is suitable for a latching device for a lid member that automatically opens in conjunction with a timer mechanism.

[Brief description of drawings]

FIG. 1 shows an embodiment in which the latching device of the present invention is applied to an automatic feeder, and FIG. 1 is a cross-sectional plan view of the automatic feeder.
Fig. 2 is a perspective view of the automatic feeder, Fig. 3 is a sectional side view of the automatic feeder, Fig. 4 is a sectional view taken along line IV-IV of Fig. 1, and Fig. 5 is a sectional plan view of a main part of the automatic feeder. FIG. 6 and FIG. 6 are cross-sectional plan views of essential parts showing another embodiment of the lock member. 1 ... Automatic feeder, 2 ... Main body, 4 ... Opening, 5 ... Lid member, 6
a, 6b ... Frame, 8 ... Latch device, 9 ... Timer mechanism, 10 ... Handle part, 11 ... Cylindrical holding part, 12 ... Opening part, 13 ... Lock member, 14a, 14b ... Rolling member, 1
5 ... Lock claw, 16 ... Engagement recess, 25 ... Cam plate

Claims (1)

[Scope of utility model registration request] 1. A latching device for latching a lid member, which is guided and movable along both inner edges of the frame, to the frame when closed, and an opening is formed in the middle of the entire length of the tip edge of the lid member. A tubular holding portion is provided, and the tubular holding portion is divided into substantially the same length as the tubular holding portion at a position facing at least the opening, and rolling members are provided at both ends and the tip of the divided portion. The arranged lock member is movably accommodated, and on the other hand, between the two rolling members of the split portion of the lock member from the opening of the tubular holding portion when the lid member is closed, at the end facing portion of the lid member of the frame. The lock claws that push the lock member to project the rolling members at both ends of the lock member from the both ends of the tubular holding member, and correspond to both ends of the tubular holding portion of the frame. To hold the tubular member in the closed position when the lid member is closed. Latching device, characterized in that the formation of the engagement recess for engaging the rolling member protruding from the timber.