JP4444058B2 - Door latching device - Google Patents

Description

The present invention relates to a door latch device provided in a door that opens and closes an opening of a cabinet, a locker or the like.

As this type of latch device, a base end is pivotally supported in a body case that is fitted in and attached to a recessed groove inside a side edge of a door, and a tip end is hook-shaped to form a body case wall. In the door latch device that includes a latch member that can project outward from the window portion of the main body, and that interlocks with the operation of the handle portion of the door, a protrusion is provided around the window portion of the body case wall, and the protrusion The base of the part is provided with an insertion groove that can be inserted into the insertion part formed on the concave groove part side of the door, while the side of the protruding part is provided with a tongue piece part having a locking claw at the tip, There is one in which a locking claw is locked in a locking hole formed in a concave groove. (For example, refer to Patent Document 1.)
In this case, since the latch member and the main body case are held in the concave groove inside the side edge of the door, when the door is forcibly opened with the door locked (when the door is stolen), The inner side edge of the door may be deformed (the distance between the inner side edge of the door and the front side will be widened), the locking claw of the main body case may come off from the locking hole, and the main body case may fall out of the groove. In particular, there was a problem with anti-theft.

No. 7-4302

  SUMMARY OF THE INVENTION An object of the present invention is to provide a door latch device that is excellent in anti-theft property, can be easily attached with a single touch, does not require a particularly difficult operation for assembly, and speeds up the attaching operation.

  Therefore, in order to solve the above-mentioned problems, the present invention is configured as a first means in which a rotating shaft is provided on the upper and lower ends of the bent edge rear surface side of the door that is removably attached to the front opening of the cabinet body or the like. A latch claw insertion part is provided through which the latch claw member attached to the upper and lower ends can be inserted, and is located inside the latch claw insertion part, and a fitting holding member is attached to the rear surface plate of the door, along the rotation axis The fitting member that is movable in the vertical direction is fitted and locked to the fitting holding member in the vertical direction with the engaging portion of the latch claw member protruding from the latch claw insertion portion to the back side of the door. The rotation shaft is rotatably held.

  Next, when the present invention is configured as the second means, in addition to the configuration as the first means, the fitting holding member includes a fitting protrusion in the vertical direction and a fitting, which are opposed to each other with a predetermined interval. The engaging member has a locking hole for locking the fitting member in the vertical direction, and the fitting member has a vertical fitting groove for fitting to the fitting protrusion and a locking protrusion for locking to the locking hole. is there.

According to the configuration as the first means, a rotation shaft in which a fitting holding member is attached to the rear surface plate of the door, the fitting member is held by the fitting holding member, and a latch claw member is attached to the upper and lower ends. Is held by the fitting member so that the door is locked and the door is forcibly opened (when the door is stolen). Therefore, the fitting member does not fall off due to deformation.
Since the fitting member can be moved in the vertical direction along the rotation axis, the fitting holding member is fitted and locked in the vertical direction, and the rotation axis is held rotatably, so the latch claw member is latched. The latch device can be attached to the door simply by moving the fitting member up and down along the rotation axis in the state where it is inserted into the claw insertion part. This speeds up the installation work without the need for it.

  According to the configuration of the second means, in addition to the effect of the configuration of the first means, the fitting holding member includes a vertical fitting protrusion and a fitting member facing each other with a predetermined interval. The fitting member is a simple fitting that has a fitting groove in the up and down direction that fits into the fitting protrusion and a locking projection that engages in the locking hole. Because of its structure, it can be manufactured at low cost.

  The present invention provides a latch claw insertion portion through which a latch claw member attached to the upper and lower ends of a rotating shaft can be inserted into the upper and lower ends of a bent edge rear surface side of a door that can be freely opened and closed in a front opening of a cabinet body or the like A fitting holding member is attached to the back of the front surface plate of the door and is located on the inner side of the latch claw insertion portion, and the fitting member that is movable in the vertical direction along the rotation axis is connected to the latch claw member. In a state where the joint portion protrudes from the latch claw insertion portion to the back side of the door, the fitting holding member is fitted and locked from above and below, the rotation shaft is rotatably held, and the fitting holding member is The fitting protrusions in the vertical direction facing each other with a predetermined interval and the locking holes for locking the fitting members in the vertical direction are fitted, and the fitting members are fitted in the vertical direction to be fitted in the fitting protrusions. It has a mating groove and a locking projection that locks in the locking hole.

Embodiments will be described below with reference to the accompanying drawings.
1-5, the code | symbol 1 has shown the door.
The door 1 is formed in a square plate shape from a surface plate 10 and a bent edge 11 having an L-shaped cross section continuously provided on a peripheral portion of the surface plate 10, and upper and lower end portions 12, 12 ( Latch claw insertion portions 13 and 13 (the lower side is not shown) whose lower part is opened are formed on the lower side.
Reference numerals 2 and 2 (the lower side is not shown) indicate fitting holding members that are located on the inner side of the latch claw insertion portion 13 and are attached to the back surface of the front plate 10 of the door 1. (The lower side is not shown.) A fitting member fitted and locked to the fitting holding member 2 is shown. Reference numeral 4 denotes a rotating shaft which is rotatably held by the fitting member. Reference numeral 5 (the lower side is not shown) denotes a latch claw member attached to the upper and lower ends of the rotating shaft 4, and reference numeral 6 denotes an operation piece facing the handle member 7.

Since the fitting holding members 2 and 2 are attached symmetrically to the upper and lower ends of the back surface of the front plate 10 of the door 1, only the upper side will be described.
The fitting holding member 2 includes vertical holding protrusions 20 and 20 which are bent at the left and right ends of the substrate 21 in the direction of the upper surface 12 on the back side of the door 1 and are opposed to each other with a predetermined interval in the horizontal direction. The end portions of the pieces 20 and 20 are bent in a direction approaching each other, and the vertical fitting protrusions 22 and 22 facing each other with a predetermined interval in the left and right direction, and the upper end portion of the substrate 21 in the direction of the upper end portion 12 on the back side The support protrusion 23 is formed by bending an L-shaped cross section upward, and the support protrusion 23 has a fitting member 3 described later at a position slightly above the fitting protrusions 22, 22. Locking holes 24 and 24 to be stopped are formed.
And the upper end surface of the support protrusion 23 contacts the back surface of the upper bent edge 11, and the substrate 21 is the surface plate where the latch claw insertion portion 13 is located in the central portion between the fitting protrusions 22 and 22. 10 is fixed to the rear surface side of the door 10 by spot welding or the like, and the fitting holding member 2 is attached to the rear surface side of the door 1.

Since the fitting members 3 and 3 are arranged symmetrically corresponding to the fitting holding members 2 and 2, only the upper side will be described.
The fitting member 3 is fitted with a base portion 32 in which a through-hole 31 through which the rotation shaft 4 is pivotably penetrated in the vertical direction and a half of the left and right end surfaces 33 of the base portion 32 and the surface plate 10 side half of the door 1 are fitted. Retained surfaces 34, 34 held by the inner surfaces of the holding protrusions 20, 20 indented to match the dimensions between the holding protrusions 20, 20 of the combined holding member 2, and the held surfaces 34, 34 and the left and right end surfaces 33, 33 and projecting outwardly at the fitting grooves 35, 35 into which the fitting protrusions 22, 22 are fitted, the held surfaces 34, 34 and the lower ends of the fitting grooves 35, 35, The holding protrusions 20 and 20 and the supporting protrusions 36 and 36 that support the lower end surfaces of the fitting protrusions 22 and 22, and the upper surfaces of the held surfaces 34 and 34 protrude upward, and downward to the locking holes 24 and 24. Locking projections 38, 38 are formed at the tips to prevent the fitting member 3 from moving downward unexpectedly. Tomeashi unit 37 is configured with integrally molded from a synthetic resin material.

  The rotation shaft 4 is formed of a square bar, and an operation piece 6 is fixed to the central portion in the vertical direction. The rotation holding members 8 and 8 are fitted around the upper and lower ends so as to be freely rotatable. In addition, the fitting members 3 and 3 are rotatably fitted from the upper and lower end portions through the through holes 31 and the latch claw members 5 and 5 are attached to the upper and lower end portions. 6 is attached so that the operation piece 6 may face the handle part 7 attached to the surface plate 10 of the door 1.

Since the rotation holding members 8 and 8 are formed in the same shape, only the upper side will be described.
The rotation holding member 8 is fitted with a through-hole 81 through which the rotation shaft 4 can rotate freely in the vertical direction, and an end surface of a rear holding hole and a front holding hole which will be described later formed on the outer peripheral end surface of the central portion in the vertical direction. And has a circular fitting groove 82 that is integrally formed of a synthetic resin material.
Since the latch claw members 5 and 5 are disposed symmetrically in the vertical direction, only the upper side will be described.
The latch claw member 5 is formed with an engaging portion 51 that engages with the engaged portion 91 of the cabinet body 100 and a rectangular fitting recess 52 that is fitted to the end of the rotating shaft 4 so as not to rotate. The fitting cylinder portion 53 is formed integrally with a synthetic resin material.
The operation piece 6 has a U-shaped cross section, and applies a rotational force in a direction in which the engaging portion 51 of the latch claw member 5 attached to the rotating shaft 4 always engages the engaged portion 91 of the cabinet body 100. A spring mounting seat 61 to which the end of the tension spring 70 is connected is formed at the lower end.

As shown in FIG. 4, the engaged portion 91 is integrally formed with the engaged member 9 made of synthetic resin.
The engaged member 9 is attached to attachment holes 101 formed in the upper and lower ends of the cabinet body 100 corresponding to the latch claw insertion portion 13 in the closed state of the door 1, and the engaged portion 91 is engaged. Projecting rearward on the inner surface side of the opening 92 of the member 9.

The handle member 7 is integrally formed of a synthetic resin material, is attached to a handle attachment hole (not shown) formed in the surface plate 10, and the operation piece 6 faces inside. From the operation hole 71, The operation piece 6 is operated by inserting a fingertip, and resists the tensile force of the tension spring 70 stretched between the cover mounting seat 72 attached to the back surface of the front plate 10 and the spring mounting seat 61 of the operation piece 6. By rotating the rotation shaft 4, the latch claw member 5 is rotated clockwise in FIG. 4, and the engaged state of the engaged portion 91 and the engaging portion 51 is released (indicated by a two-dot chain line in FIG. 4). State shown), the door 1 is opened.
Reference numeral 73 is screwed to the back side of the cover mounting seat 72 to conceal the cover mounting seat 72, the handle member 7, and the operation piece 6, and rotate the rotating shaft 4 via the rotation holding members 8 and 8. The cover body to hold freely is shown.

  The cover mounting seat 72 corresponds to the upper and lower support projecting pieces 722 and 722 formed on the upper and lower ends of the mounting substrate 721 and the bent edge 11 on the side end portion side of the door 1, and a predetermined distance from the bent edge 11. The side support protrusions 723 are formed to have half-ends, and the end faces are fitted into the circular fitting grooves 82 of the rotation holding members 8 and 8 near the bent edges 11 of the upper and lower support protrusions 722 and 722. Circular rear holding holes 724 and 724 are formed, and side support protrusions 723 are formed with connecting holes 725 and 725.

The cover body 73 has a box shape that opens on the surface plate 10 side of the door 1, and includes a fitting protrusion 731 that fits between the bent edge 11 on the side edge portion side of the door 1 and the surface plate 10, and a side support projection. Upper and lower holdings having a connecting projection piece 734 formed on the outer side of the piece 723 and having connecting holes 732 and 732 corresponding to the connecting holes 725 and 725 and front holding holes 735 and 735 corresponding to the rear holding holes 724 and 724 Projections 736 and 736 are formed.
The front holding holes 735 and 735 are fitted with the circular fitting grooves 82 of the rotary holding members 8 and 8 at their end surfaces, similarly to the rear holding holes 724 and 724. That is, the rotation holding members 8 and 8 are held by the cover mounting seat 72 and the cover body 73 so as not to be movable in the front-rear and left-right directions, so that the rotation shaft 4 is located with respect to the door 1 at the center in the vertical direction. It is held so that it can rotate without wobbling.

  The present invention is configured as described above. From the upper and lower ends of the rotating shaft 4 to which the operation piece 6 is fixed, the rotation holding members 8 and 8 are externally fitted to be positioned above and below the operation piece 6. With the fitting members 3 and 3 fitted to the through holes 31 so as to be freely rotatable from the upper and lower end portions, and the latch pawl members 5 and 5 being attached to the upper and lower end portions, the operation piece 6 is a front surface of the door 1. The circular fitting grooves 82 and 82 of the rotation holding members 8 and 8 are positioned on the end faces of the rear holding holes 724 and 724 of the cover mounting seat 72 so as to face the operation holes 71 of the handle member 7 attached to the face plate 10. At the same time, the upper and lower fitting members 3, 3 are moved in the vertical direction with the fitting cylinder portions 53, 53 of the latch claw members 5, 5 positioned in the latch claw insertion portions 13, 13. Then, while fitting the fitting protrusions 22 of the fitting holding members 2 and 2 into the fitting grooves 35. By moving in the vertical direction, the locking protrusions 38 of the fitting members 3, 3 are locked in the locking holes 24 of the fitting holding members 2, 2 from the vertical direction, and at the same time the holding protrusion 20. ... and the projecting protrusions 22 ... are brought into contact with the support projecting walls 36 ... and the fitting holding members 2, 2 are engaged with the fitting members 3, 3, With the engaging portions 51, 51 projecting from the latch claw insertion portions 13, 13 to the back side of the door 1, the upper and lower end portions of the rotation shaft 4 are rotatably held on the door 1.

  Next, the insertion protrusion 731 of the cover body 73 is inserted from the side of the side edge portion of the door 1 and the front plate 10 in an oblique direction on the back surface side, and the end surfaces of the front holding holes 735 and 735 are rotated. The side support protrusions are fitted in the circular fitting grooves 82 and 82 of the holding members 8 and 8, and the rotation holding members 8 and 8 are held by the front holding holes 735 and 735 and the rear holding holes 724 and 724. The piece 723 and the connecting projection piece 734 are screwed to connect the cover mounting seat 72 and the cover body 73.

Main part exploded perspective view of latch device The exploded perspective view of the principal part of the upper part of the latch device Sectional drawing of the principal part of the latch claw member portion of the latch device AA line partial sectional view of FIG. BB partial sectional view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door 10 Front plate 11 Bending edge 12 Back side upper and lower end part 13 Latch claw insertion part 2 Fitting holding member 22 Fitting protrusion 24 Locking hole 3 Fitting member 31 Through hole 35 Fitting groove 38 Locking protrusion 4 Rotating shaft 5 Latch claw member 51 Engagement part

Claims (2)

A latch claw insertion part through which a latch claw member attached to the upper and lower ends of the rotating shaft can be inserted and latched on the upper and lower ends of the back side of the bent edge of the door that can be freely opened and closed at the front opening of the cabinet body, etc. The engagement part of the latch claw member latches the fitting member that is located inside the claw insertion part, attaches a fitting holding member to the back of the front plate of the door, and can move vertically along the rotation axis. A door latching device characterized in that it is fitted and locked to the fitting holding member from above and below in a state of protruding from the claw insertion part to the back side of the door, and the rotating shaft is rotatably held. The fitting holding member has vertical fitting protrusions facing each other with a predetermined interval, and a locking hole for locking the fitting member in the vertical direction. The fitting member is fitted to the fitting protrusion. The door latch device according to claim 1, further comprising a fitting groove in a vertical direction to be mated, and a locking projection that is locked to the locking hole.

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