JP3168288B2 - Opening lid hook - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latch for latching a lid to an opening, and more particularly, to latching or releasing the lid and the opening alternately each time the lid is pressed against the opening. Related to a hook.

[0002]

2. Description of the Related Art Conventionally, a ceiling or the like of a building is provided with an opening for inspection, and a lid which can be opened and closed is attached to the opening. A general opening is formed by cutting out a predetermined portion of a wall material such as a ceiling and reinforcing the edge with a reinforcing material. Then, a lid having a size suitable for the opening is prepared, and an appropriate latch is usually used for opening and closing the lid. Many of the conventionally used latches consist of a latch and a catch that receives it, attach the latch to the lid,
A metal fitting is attached to the edge of the opening, and the lid is opened and closed by attaching and detaching the hook metal to and from the metal fitting.

[0003]

However, in order to open and close the lid using such a conventional latch, it is necessary to support the lid in a predetermined position with one hand and operate the latch with the other hand. Always needed both hands. In addition, when the opening is large, the weight of the lid increases, so that two persons may be required to open and close the lid. Further, the hook is exposed on the surface of the lid, which is not preferable in appearance. Therefore, the present invention solves such a problem of the conventional latch, and has an object to provide a one-touch latch which can be operated with one hand and does not have any parts which impair the appearance on the surface of the lid. Is what you do.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a latch according to the present invention is a latch for latching a lid on an opening, and is opposed to either the opening or the lid. It is composed of a main body and a hook that can be attached. The hook has a cam engaging claw on its side. On the other hand, a hook insertion path into which the hook can be inserted into the main body,
Pressing means for pressing the head in the direction opposite to the insertion direction when the hook is inserted into the hook insertion path, and rotatably supported adjacent to the hook insertion path and capable of engaging with the cam engaging claw of the hook. A cam body having a plurality of engagement grooves and a spring for rotating the cam body are provided. The spring is configured to resiliently press the outer periphery of the cam body, rotate the cam body according to the outer peripheral shape at the resilient position, and restrain the cam body. Then, when the hook is inserted into the hook insertion path, the spring is fitted into one of the engagement grooves, and the engagement groove of the cam body is held at a hook lock position facing the cam engagement claw of the hook. Is done. Further, when the hook is pushed back from the state by the pressing means, the cam engaging claw is engaged with the engaging groove of the cam body to be in a locked state, and the cam is slightly moved by the locking operation. The rotation of 40 causes the spring 50 to separate from the engagement groove 42 and press against the edge of the engagement groove. Next, when the hook 1 is pressed again from that state, the cam body 40 is rotated by the elastic force of the spring 50, and is held at the hook release position where the engaging groove 42 and the cam engaging claw 5 do not face each other. The hook 1 is configured to be pushed back by the pressing means 30 and detached from the main body 2.

[0005]

According to the hooking device of the present invention, by attaching the main body and the hook to either the opening or the lid, the latching and releasing can be repeated each time the lid is pressed against the opening. Therefore, the opening / closing operation can be performed with one hand if the opening is of a normal size, and the opening / closing operation can be sufficiently performed by one person even in the case of a large opening. Furthermore, since there are no parts on the surface of the lid that impair the appearance, the appearance is excellent.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing an example of the latch of the present invention. The hook comprises a hook 1 and a main body 2. The hook 1 has a mounting portion 3, an elongated plate-like insertion shaft 4 erected perpendicularly from the mounting portion 3, and a cam engaging claw 5 provided at a right angle from the side of the insertion shaft 4. The hook 1 has, for example, a pair of bolts 7
And nut 8.

The main body 2 comprises a U-shaped casing 9 having upper and lower sides and one side part opened, and a cover 10 for closing the upper and lower parts and the side parts. The casing 9 includes a back plate 11 and a pair of side plates 12 extending at right angles from both ends thereof, and a hook insertion path 13 is formed inside one of the side plates 12. The side plate 12 constituting one wall of the hook insertion path 13 is formed with an uneven surface having a large number of lateral grooves for preventing the hook from slipping.

[0008] A pair of flanges 14 are provided extending perpendicularly outward from the top of each side plate 12, and each flange 14 has a hole 15 for attachment to, for example, an edge of an opening by a bolt or the like. Is provided. Further, a pair of flanges 16 extending outwardly at right angles from the sides of the side plate 12 are provided, and the flanges 16 are also provided with mounting holes 17. A slit 18 is provided on each of the flanges 16.

The cover 10 comprises a front plate 19, an upper plate 20 and a bottom plate 21, and has a U-shape with both sides open. Holes 22 corresponding to the holes 17 of the flange 16 of the casing 9 are provided at both ends of the front plate 19. A pair of insertion pieces 24 formed by slits 23 are provided near both sides of the upper plate 20, and the insertion pieces 24 have holes 15 of the flange 14.
Are provided. A U-shaped insertion hole 26 is provided near one end of the bottom plate 21. This insertion hole 26 is for inserting the hook 1,
With the cover 10 attached to the casing 9,
The hook insertion path 13 located at the upper part is configured to be coincident with the hook insertion path 13.

A pressing means 30 is provided inside the main body 2 for pressing the head of the hook 1 inserted into the hook insertion path 13 in a direction opposite to the insertion direction. This pressing means 30
Is composed of a shaft 31 having both ends fixed to the back plate 11 and the front plate 19, and a spring 32 supported by the shaft 31. The U-shaped arm 33 of the spring 32 forms a downward pressing body. A cam body 40 is further provided inside the main body 2. The cam body 40 is composed of an elongated block body rotatably supported by a shaft 41 having both ends fixed to the back plate 11 and the front plate 19, and the length thereof is a U-shaped arm 33 of the spring 32. Is slightly smaller than the width. The cross section perpendicular to the axis has a continuous shape in which both short sides of a rectangle are formed in an engagement groove 42 formed of a V-shaped or U-shaped concave groove, and both long sides are formed in a plane 43.

Angle setting members 44 are fixed to the outer sides of both ends of the cam body 40 in the axial direction. The angle setting member 44 has an elongated butterfly shape, and its longitudinal direction is slightly inclined with respect to a line connecting the centers of the engagement grooves 42. The arm 33 of the spring 32 is engaged with the upper surface of the angle setting member 44 to forcibly set the angle of the cam body 40. A spring 50 for driving the cam body 40 is provided diagonally below the cam body 40. The spring 50 is supported by a shaft 51 having both ends fixed to the back plate 11 and the front plate 19.

The spring 50 constitutes a torsion spring wound a plurality of times around a shaft 51, a central arm 53 is formed in a U-shape, and a distal end 55 is formed in an arc shape (this distal end is formed). The portion is shown in FIGS. 3 to 6), and is configured to be able to engage with the engagement groove 42 of the cam body 40. When the cover 10 is attached to the casing 9, the distal ends of the arms 54 at both ends come into contact with and are supported by the upper surface of the bottom plate 21. FIG. 2 shows a state in which the hook 1 is inserted into the main body 2 assembled by caulking the casing 9 and the cover 10 of FIG.

Next, the operation of the latch of FIG. 1 will be described with reference to FIGS. First, in FIG. 3, one edge of the opening 60 and the lid 6 are connected by a hinge (not shown), and the main body 2 is mounted inside the opposite edge of the hinge connection portion. The hook 1 is attached to a predetermined position of the lid 6 corresponding to the part. Before the insertion shaft 4 of the hook 1 is inserted into the hook insertion path 13 of the main body 2, the distal end 55 of the arm of the spring 50 is engaged with one of the engagement grooves 42 of the cam body 40, and the cam body 40 is slanted to the right. The angle is set so that the other engagement groove 42 is located above.
The position of the cam body 40 at this angle is a hook lock position where the engaging claw 5 of the hook 1 to be inserted and the engaging groove 42 of the cam body 40 face each other. On the other hand, the arm 33 of the pressing means 30 is also engaged with the upper surface of the angle setting member 44 of the cam body 40, so that the angle of the cam body 40 can be set more reliably.

When the lid 6 is pushed to insert the insertion shaft 4 of the hook 1 into the hook insertion path 13 of the main body 2 as shown in FIG. 3, first, the arm 33 of the pressing member 30 is opposed to the downward pressing force by its head. Arm 33 and lift the arm 33
It is detached from the upper surface of the zero angle setting member 44. At this time, the cam engaging claw 5 comes into contact with the flat surface 43 of the cam body 40, and slides up while slightly tilting the cam body 40 in the counterclockwise direction. When the hook 1 is further inserted, the cam engaging claw 5 is disengaged from the flat surface 43 of the cam body 40, and the cam body 40 is
4 returns to the angle of the hook lock position.
State. Thus, the cam body 4 when the hook 1 is inserted
0 is always maintained at the angle of the hook lock position by the spring 50. FIG. 4 shows a state in which the cam engaging claw 5 of the hook 1 is completely disengaged from the cam body 40, and the head of the hook 1 is inserted up to the top of the hook insertion path 13.

FIG. 5 shows a state in which the hook 1 is returned from the state shown in FIG. 4 in the reverse direction while the insertion force of the hook 1 is relaxed and adapted to the downward pressing force of the pressing means 30. That is, hook 1
The tip of the engaging claw 5 contacts the upper protrusion of the engaging groove 42 of the cam body 40 to lock the rotation of the cam body 40, whereby the engaging claw 5 and the engaging groove 42 are engaged with each other. Locked. At this time, the hook 1 is connected to the engaging claw 5 and the cam body 4.
It is stably locked to the main body 2 by being sandwiched between two places between the zeros and between the side surface of the insertion shaft 4 and the side plate 12 of the main body 2. as a result,
The lid 6 is hooked on the opening 60. Next, when the lid 6 is pushed again to push the hook 1 into the insertion path 13 of the main body 2, the engaging claw 5 is disengaged from the engaging groove 42 of the cam body 40, and the state shown in FIG. 6 is obtained. That is, the cam body 40 released by the engagement claw 5 is rotated clockwise by the spring 50, and the engagement groove 42 is held at the hook release position where the engagement groove 42 does not face the engagement claw 5 of the hook 1. .

Accordingly, when the force applied to the lid 6 is released from this state, the hook 1 is pushed back downward by the pressing means 30 and detached from the insertion hole, whereby the lid 6 and the main body 2 are removed.
Is released. On the other hand, the hook 1 is
When the engagement claw 5 is disengaged from the cam body 40,
Is rotated while contacting the spring 50, so that the engagement groove 42 of the cam body 40 reaches a position where the engagement groove 42 contacts the tip 55 of the spring of the spring 50. Then, the cam body 40 is further rotated by the spring action, and the engagement groove 42 is engaged with the tip portion 55 of the spring. In this state, the position of the cam body 40 is shown in FIG.
, Ie, the hook lock position, and enters a standby state waiting for the next hook 1 to be inserted. In the present embodiment, the rotating action of the pressing means 30 is performed simultaneously with the rotating action of the spring 50 on the cam body 40, so that the position setting of the cam body 40 is more reliably performed.

In the above description, the hook 1 is attached to the lid 6 and the main body 2
Are respectively attached to the openings 60, but the hook 1 can be attached to the opening 60, and the main body 2 can be attached to the lid 6. Although the angle setting member 44 is provided on the cam body 40 to ensure the setting of the angle, this means can be omitted in some cases. Further, as an application example of the latch of the present invention, a hook and a main body may be attached to each side of the opening and the lid as a pair, and the lid may be attached to and detached from the opening in parallel.

[0018]

According to the present invention, the latch for the lid at the opening of the present invention is constructed as described above, so that the lid can be opened and closed with one hand. Furthermore, since there is no component that impairs the appearance on the surface of the lid, the appearance is excellent.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an example of a latch of the present invention.

FIG. 2 is a perspective view showing a state in which a hook 1 is inserted into a main body 2 assembled by caulking a casing 9 and a cover 10 of FIG. 1;

FIG. 3 is an explanatory view showing the operation of the latch of FIG. 1;

FIG. 4 is an explanatory view showing the operation of the latch of FIG. 1;

FIG. 5 is an explanatory view showing the operation of the latch of FIG. 1;

FIG. 6 is an explanatory view showing the operation of the latch of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hook 2 Main body 3 Mounting part 4 Insertion shaft 5 Cam engaging claw 6 Cover 7 Bolt 8 Nut 9 Casing 10 Cover 11 Back plate 12 Side plate 13 Hook insertion path 14 Flange 15 hole 16 Flange 17 hole 18 Slit 19 Front plate 20 Upper plate 21 bottom plate 22 hole 23 slit 24 insertion piece 25 hole 26 insertion hole 30 pressing means 31 axis 32 spring 33 arm 40 cam body 41 axis 42 engagement groove 43 plane 44 angle setting member 50 spring 51 axis 53 arm 54 arm 55 tip end section 60 Aperture

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E05C 19/02 E04F 19/08 101

Claims (1)

(57) [Claims] 1. A hook for hooking a lid 6 to an opening 60, comprising a main body 2 and a hook 1 attached to one of the opening 60 and the lid 6. The main body 2 has a hook insertion path 13 into which the hook 1 can be inserted and a head insertion direction when the hook 1 is inserted into the hook insertion path 13. Pressing means 30 for pressing in the opposite direction, rotatably supported adjacent to the hook insertion path 13, and
A cam body 40 having a plurality of engagement grooves 42 on its outer periphery capable of engaging with the cam engagement claw 5 of the hook 1; and a cam body 40 for resiliently pressing the outer periphery of the cam body 40. A spring 50 is provided to rotate and restrain the cam 40. When the hook 1 is inserted into the hook insertion path 13, the spring 50 fits into one of the engaging grooves 42 and The engaging groove 42 is held at a hook lock position facing the cam engaging claw 5 of the hook 1, and when the hook 1 is pushed back by the pressing means 30 from that state, the cam engaging claw 5 is The cam 40 is slightly rotated with the locking operation by engaging with the engaging groove 42 of the body 40, and the spring 50 is disengaged from the engaging groove 42, and Press against the edge of the groove, then from that state When the hook 1 is pushed in, the cam body 40 is rotated by the elastic force of the spring 50, and the engaging groove 42 and the cam engaging claw 5 are held at a hook releasing position where they do not face each other. Characterized by being pushed back by said pressing means 30 and being detached from said main body 2.