JPH0330539Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a locking mechanism for an opening/closing door, for example, for smoothly opening, closing, and locking a double door.

(Prior Art) Transport carts with double doors are often used to move mail within post offices and small packages within station premises. This type of door opens in the center, making it convenient for handling cargo, etc., but it tends to rattle, and if internal pressure is applied to the closing part from the inside with a large amount of material being transported, it will bulge outward and will not close easily. do not have.

It is also difficult to open and close, requiring both hands to hold down the left and right doors and lower the latch.

(Technical Issues) Therefore, the present invention has been developed to provide a locking mechanism for opening/closing doors that can be closed without using both hands, can be easily locked as is, and does not expand even when internal pressure is applied when the door is closed. The purpose is to provide a locking mechanism.

(Technical Means) The present invention which achieves the above object has a latch plate 3, which overlaps the opening and closing sides of the pair of doors 1 and 2 in the closed state.
4, one end of the handle 5 is rotatably supported on the latch plate 4 of the other door, and through holes 7, 8 are large enough to allow a latch 6 integrally formed at the end to pass through.
is formed on both latch plates 3 and 4, and a lock pin 9 engages with the latch 6 in the through hole of one latch plate 3.
and a second pin 1 in contact with the pin 9.
0 is provided on the other latch plate 4, and a third pin 11 is provided on one latch plate 3, which holds the second pin 10 between it and the lock pin 9.

(Function of the invention) This invention has a latch plate 3 overlapping a pair of doors 1 and 2,
4, from overlapping areas, simply pushing one door will close the other door at the same time.
By operating the opening/closing handle 5 provided on one latch plate 3, the tip latch 6 is opened on the other latch plate 4.
Since the locking pin 9 is engaged with the locking pin 9 provided on the mating latch plate 4, the locking operation is performed following the closing operation, and when the locking state is achieved, the second pin 10 provided on the mating latch plate 4 is sandwiched between the locking pin 9 and the third pin 11. Therefore, it resists the force that pushes and pulls the pair of doors 1 and 2 laterally.

(Example) To explain the following using an example, the drawing relates to a box-shaped pallet truck, which is equipped with two double doors, top and bottom, consisting of a pair of doors 1 and 2 that serve as a front frame 12. 12, 13, 14, and 15 are stretched with wire mesh 16, and a middle shelf frame 18 with punched metal 17 stretched thereon is pivoted by a shaft 19 on the rear side and can be bent in the middle and flipped up. The same applies to 20.

The pair of doors 1 and 2 in the embodiment are of the same shape and size, and in order to provide latch plates 3 and 4 on the opening and closing sides, the door frames 21 and 22 are cut out at the center and approximately U-shaped latch bases 23 and 24 are attached. , Latch plates 3, 4 are provided on the flat vertical bars 23a, 24a of each base 23, 24, and the bent portions 3a, 4a of the ends thereof are positioned so as to be latched to the vertical bars 24a, 23a on the other side when the door is closed. Placed. On the front side of the latch plate 4 of the other door (the right door in FIG. 4) 2, a tip shaft portion 5a of a handle 5 is rotatably supported via bearing members 25, 25, The latch 6 protruding from the latch plate 3 enters through holes 7 and 8 protruding from approximately the center of the latch plates 3 and 4, and can be rotated within the hole by operating a handle.

The lock pin 9 with which this latch 6 engages is provided on the latch plate 3 of the mating door, that is, one door (the left door in FIG. 4) 1. 6 engages. On one latch plate 3, there is a lock pin 9 and a third pin located at a distance about the diameter of the lock pin 9.
A second pin 10 provided on the other latch plate 4 is sandwiched between these two pins 9, 11 so that the three pins 9, 10, 11 are lined up horizontally when the door is closed. It's getting old. 2nd and 3rd pin 1
0 and 11 are provided so as to avoid the through holes 7 and 8 so as not to prevent the movement of the latch 6. In each figure, 26 is a mounting plate 27 for mounting the bearing member 25, which is a handle provided on the other end of the handle, and 28 is a retaining piece that locks onto the handle shaft near the handle. ) 2 by a shaft 29.

(Effect of the invention) With the above configuration, the latch plates 3 and 4 of the locking mechanism R of the present invention attached to each door 1 and 2 overlap when the doors are closed, and from the point where they overlap halfway, both doors can be opened by simply pushing with the handle 5. 1 and 2 can be closed, and when both doors 1 and 2 are closed in a straight line, the latch 6 can be engaged with the locking pin 9 by rotating the handle 5. In the closed state, each latch plate 3, 4 has three pins 9, 10, 11 (and latch base 2).
Since the locks are locked facing each other with the vertical rods 23a and 24a) in between, even if internal pressure is applied to the lock part due to a large amount of transported objects, it will not bulge outward. In addition, if a force is applied to each door 1, 2 in the left-right direction, the pin 10 provided on the latch plates 3, 4
are engaged with the remaining pins 9, 11, thereby preventing the pair of doors 1, 2 from being separated or being pressed against each other. Therefore, opening and closing can be performed very smoothly by one-handed operation using the handle 5, and little force is required.Each part fits between the integrated latch plates 3 and 4, and only the handle 5 protrudes from the outside, so it can be made small and compact. .

[Brief explanation of the drawing]

The drawings show one embodiment of the locking mechanism for opening/closing doors according to the present invention. Figure 1 is a front view of a truck equipped with the mechanism of the present invention, Figure 2 is a plan view, Figure 3 is a right side view, FIG. 4 is a perspective view of essential parts of the proposed mechanism, FIG. 5 is a cross-sectional view, and FIG. 6 is a front view. 1, 2...Door, 3, 4...Latch plate, 5...Handle, 6...Latch, 7, 8...Through hole, 9...Lock pin, 10...Second pin, 11...Third pin.

Claims (1)

[Scope of utility model registration request] Latch plates 3 and 4 are provided on the opening and closing sides of the pair of doors 1 and 2, and overlap each other in the closed state, and one end of the handle 5 is rotatably supported on the latch plate 4 of the other door.
Through holes 7 and 8 are formed in both latch plates 3 and 4 and are large enough to allow the latch 6 integrally formed at the end portion thereof to pass therethrough, and the latch 6 is engaged with the through hole in one of the latch plates 3. A lock pin 9 is provided, and the pin 9
A locking mechanism for an opening/closing door comprising a second pin 10 in contact with the other latch plate 4, and a third pin 11 sandwiching the second pin 10 between the lock pin 9 and the latch plate 3. .