JPH0513876Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is used for the doors of boxes and buildings that house machinery and equipment such as switchboards and control panels, and can be used simply by closing the door. This relates to a push latch device in which a latch automatically advances and retreats to engage with a receiving part on a building or a box body, and when the door is opened, the latch is released from the receiving part by simply pressing an operating lever.

(Prior art) In conventional latch devices, the position occupied by the latch when it slides and is biased by a built-in spring and pops out most from the side opening of the casing, that is, the protruding position of the latch, is fixed for each latch device. It has a structure that cannot be changed or adjusted arbitrarily.

(Problem to be solved by the invention) However, with a latch device in which the latch pops out position is fixed, when there is an error in the mounting dimensions between the door and the side pillar where the receiving part of the building or box body is provided, Alternatively, if there is an error in the mounting position between the door and the casing of the latch device, the engagement length between the latch and the receiving part will be shorter than the designed value, making it difficult to establish a firm lock, or the side pillar may The provided guide surface portion and the cam surface portion of the latch may not abut properly, and the latch may not move backward.

Therefore, it is necessary to carefully perform the door installation work and the casing installation work so that the work is in a predetermined position, making it difficult to improve work efficiency.

Furthermore, in conventional latch devices, the cam surface of the latch is formed so as not to face the opposite side of the door, that is, the back surface of the door. Therefore, the latch moves forward and backward only when the door is pushed and closed from the front side of the door, and the latch does not move forward and backward when the door is pulled and closed. Such a type of latching device must be designed and manufactured separately, which results in a relatively high cost.

Therefore, the purpose of the present invention is to enable the protrusion position of the latch to be changed and adjusted within a certain range without changing the advancing and retracting stroke of the latch, so that door installation work and casing installation work can be carried out efficiently. By simply changing the assembly method, the latch moves forward and backward when the door is pushed closed.
To provide a push latch device in which an operation type in which a latch moves forward and backward when a door is pulled and closed can be arbitrarily selected.

(Means for Solving the Problems) The push latch device of the present invention will be explained below using the reference numerals in the attached drawings. The provided casing 1 and the arm plate part 11 which is pivotally connected to the casing 1 by a pivot shaft 4 disposed vertically parallel to the front plate part 3 and inserted into the window hole 42 of the casing 1 are attached to the back side. The protruding operating lever 5 is fitted into the casing 1 from the left side opening 7 of the casing 1 so as to be freely forward and backward in the left-right direction, and the cam surface portion 8a collides with the guide surface portion 39 of the side column 6, and the left end portion is attached to the side column 6. The operation lever 5 engages with the receiving part 40 of 6.
A latch 8 is provided with a notch 27 through which the arm plate 11 is inserted from the middle part of the front face to the right end part.
and an adjustment bolt 9 which is arranged horizontally in the left-right direction, moves forward and backward together with the latch 8, and is attached to the latch 8 so as to be rotatable with respect to the latch 8; an adjustment block which is housed so as to be movable in the left-right direction, whose rotation is prevented by the upper wall plate portion 28 and lower wall plate portion 29 of the latch 8, and whose left end surface 10a abuts the arm plate portion 11 of the operating lever 5; 10 and the regulating block 10
The right end surface 10b of the casing 1 and the right side plate portion 12 of the casing 1
and a spring 13 inserted between the latch 8 and the spring 13 to urge the latch 8 to protrude leftward. The pair is formed into a rectangular shape with two sides perpendicular to the front plate part 3, and the outer shape of the latch 8 in the vertical cross section is made to match the left side opening 7.
It is formed by penetrating the notch 27 in the front-rear direction.

(Function) In the push latch device shown in FIGS. 1 to 4, when the door 2 is pushed in the closing direction, the latch 8
The cam surface portion 8a at the left end of the guide surface portion 39 of the side column 6
The latch 8 automatically slides back to the right against the bias of the spring 13. When the door 2 is completely closed, the left side opening 7 of the casing 1 and the receiving part 40 of the side post 6 are in a position where they are directly facing each other.
The latch 8 is pushed by the spring 13 and protrudes from the casing 1 by a required stroke, and the left end of the latch 8 automatically engages with the receiving part 40.

When the operating lever 5 is pushed to open the door 2, the arm plate portion 11 of the operating lever 5 pushes the left end surface 10a of the adjusting block 10, so that the adjusting bolt 9
The latch 8, which is connected to the adjusting block 10 via the latch 8, is slid back to the right against the spring 13. Due to this backward sliding, the left end of the latch 8 escapes from the receiving part 40, so that the door 2 relative to the side column 6
The lock is released, and the door 2 can be opened.

In the above usage mode, the cam surface portion 8a of the latch 8
Since the latch 8 is arranged so as not to face the back side of the door 2, the latch 8 moves forward and backward when the door 2 is pushed and closed.

On the other hand, in the usage mode shown in FIG. 5, the cam surface portion 8a of the latch 8 is arranged to face the back surface of the door 2, so the latch 8 moves forward and backward when the door 2 is pulled and closed. do.

(Example) In the illustrated example, the front plate portion 3 of the casing 1
A pair of upper and lower U-shaped bearings 14 and 15 are bent at the edge of the window hole 42, and the upper and lower ends of the threaded rod-shaped pivot 4 inserted into the bearings 14 are connected to the casing 1. It is inserted into the through hole 18 of the upper side plate part 16 and the through hole 19 of the lower side plate part 17, and is prevented from coming out with a nut 20. The casing 1 has overhanging mounting plates 21 and 22 protruding in front of the front plate portion 3, and the casing 1 has a fixing device 4 such as a screw passing through a fixing hole 23.
1 to the back of the door 2.

Finger rest plate 5a provided at the front end of the operating lever 5
is located within the operating opening 25 of the door 2 and does not protrude from the front of the door 2. The pivot 4 is connected to a finger rest plate 5.
It is inserted into the through hole 43 of the upper and lower wall plate portions of a. If necessary, an operating handle with a long arm may be integrally provided on the finger rest plate portion 5a. The latch 8 is slidably fitted into a rectangular left side opening 7 formed by the front plate 3, rear plate 26, upper side plate 16, and lower side plate 17 of the casing 1. , the upper wall plate portion 28 and the lower wall plate portion 2 of the latch 8.
The latch 8 cannot rotate within the casing 1 since the latch 9 rests on the upper side plate 16 and the lower side plate 17 of the casing 1.

The front end protrusion 10c of the adjustment block 10, which has a rectangular vertical cross section, is slidably fitted into the notch 27 of the latch 8, and the upper surface 10d and lower surface 10e of the adjustment block 10 are connected to the upper wall plate 28 of the latch 8, The adjustment block 10 is in contact with the side wall plate 29, and the rear surface 10f of the adjustment block 10 is in contact with the rear plate 26 of the casing 1. The adjusting block 10 is therefore slidable within the casing 1 along the length of the latch 8, but is not rotatable.

The threaded rod portion 9b of the adjustment bolt 9 is connected to the adjustment block 1.
It is screwed into the central screw hole 30 of 0. The central screw hole 30 is formed in the length direction of the latch 8, that is, in the direction in which the latch 8 moves forward and backward. The head 9a of the adjustment bolt 9 is accommodated in the counterbore 31 of the rear side bending plate 8b of the latch 8 and the counterbore 33 of the stopper plate 32 fixed to the latch 8, so it cannot be rotated. However, the latch 8 cannot be moved in the longitudinal direction. Since the counterbore hole 33 of the stopper plate 32 is open to the outside of the casing 1, by inserting a rotary tool 37 such as a screwdriver through the counterbore hole 33,
Adjustment bolt 9 is rotated.

The cut-out protrusion 34 provided on the back plate 26 of the casing 1 has a left end surface 10 of the adjustment block 10.
The rear edges of a abut against each other, thereby setting the limit of advancement of the adjusting block 10 and latch 8.
A through hole 35 is provided in the back plate portion 26 of the casing 1 near the cut-out protrusion 34, and after the adjustment operation,
A locking screw 36 that prevents relative movement between the adjusting block 10 and the adjusting bolt 9 is tightened through the through hole 35 with a rotary tool 38 such as a screwdriver.

(Effect of the invention) As described above, in the push latch device of the present invention, the latch 8 is inserted from the left side opening 7 of the casing 1.
is fitted into casing 1 so that it can move forward and backward in the left and right direction,
An adjustment bolt 9 arranged horizontally in the left-right direction is moved to the latch 8 together with the latch 8, and is rotatably attached to the latch 8, and the adjustment bolt 9 is screwed into an adjustment block 10 that is non-rotatably housed in the casing 1. Then, insert the arm plate part 11 of the operating lever 5, which is inserted through the window hole 42 of the front plate part 3 of the casing 1 and the notch part 27 of the latch 8, into the left end surface 10a of the adjustment block 10.
By rotating the adjusting bolt 9, the distance between the left end of the latch 8 and the adjusting block 10 can be easily increased or decreased. Latch 8
The protruding position of the latch 8 can be easily adjusted without changing the forward/backward stroke of the latch.

Therefore, if there is an error in the mounting dimensions between the building or side pillar and the door, or if there is an error in the mounting position between the door and the casing, we will be able to fully absorb the error. It is important to ensure that the length of engagement between the latch and the receiver part necessary for establishing a firm lock is secured as designed, and that the guide surface of the side post and the cam surface of the latch are properly brought into contact with each other to secure the latch. can be operated smoothly. Since adjustments can be easily made within a certain range after the casing is installed, door installation work and casing installation work can be carried out efficiently, ignoring slight errors.

Furthermore, in the push latch device of the present invention, the left side opening 7 of the casing 1 into which the latch 8 is inserted so as to be able to move back and forth in the left and right direction has one set of two sides parallel to the front plate part 3, and another set of two sides parallel to the front plate part 3. The latch 8 is formed into a rectangular shape with sides perpendicular to the front plate part 3, and the outer shape of the latch 8 in a vertical cross section matches the left side opening 7, so that the latch 8 into which the arm plate part 11 of the operating lever 5 is inserted is formed. Since the notch 27 is formed to penetrate in the front-rear direction, the latch 8 can be turned upside down with the front and back sides, i.e.
It can be flipped 180 degrees and fitted into the left side opening 7, thereby allowing the cam surface 8a of the latch 8 to fit into the left side opening 7.
are placed facing the back of the door 2, and
It is also possible to arrange the cam surface portion 8a of the latch 8 so that it does not face the back surface of the door 2.

In other words, with the push latch device of the present invention, by simply changing the assembly method, the latch can move forward and backward when the door is pushed to close it, and the latch can move forward and backward when the door is pulled to close it. can be selected arbitrarily.

Since the push latch device of the present invention can be used for both operating methods, there is no need to separately design and manufacture devices for each operating method and keep them in stock, which reduces manufacturing and inventory costs. It is cheaper and sales management is easier.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a push latch device according to an embodiment of the present invention, and FIG. 2 is a front view of the push latch device assembled so that the latch moves forward and backward when the door is pushed closed. FIG. 3 is a horizontal sectional view of the main part of the push latch device. FIG. 4 is a horizontal sectional view of the main part showing the state in which the push latch device is used, and the latch's protruding position has been moved toward the side column compared to the state shown in FIG. 3. FIG. 5 is a horizontal sectional view of the main part of the push latch device assembled so that the latch moves forward and backward when the door is pulled and closed. DESCRIPTION OF SYMBOLS 1...Casing, 2...Door, 3...Front plate, 4...Pivot, 5...Operation lever, 6...Side column, 7...Left side opening, 8...Latch, 9...
Adjustment bolt, 10...Adjustment block, 11...Arm plate, 12...Right side plate, 13...Spring,
32...Cash plate, 40...Cash receiving section.

Claims (1)

[Scope of utility model claims] A window hole 42 fixed to the door 2 and penetrating in the front-rear direction
a casing 1 provided on a front plate part 3 ; an arm plate pivotally attached to the casing 1 by a pivot 4 disposed vertically in parallel with the front plate part 3 and inserted into the window hole 42 of the casing 1; The operating lever 5 has a portion 11 protruding from the back side; it is fitted into the casing 1 from the left side opening 7 of the casing 1 so as to be able to move forward and backward in the left-right direction, and the cam surface portion 8a at the left end is connected to the guide surface portion 39 of the side column 6. The left end of the receiving part 40 of the side column 6 collides with the
A latch 8 is provided with a notch 27 extending from the front middle part to the right end, through which the arm plate part 11 of the operating lever 5 is inserted; and an adjustment bolt 9 which is rotatably attached to the latch 8; and which is screwed onto the adjustment bolt 9 and is housed in the latch 8 so as to be movable in the left and right direction, and which is attached to the upper wall plate portion of the latch 8. 28 and the lower wall plate part 29, and the adjustment block 10 is prevented from rotating by the lower wall plate part 29, and the arm plate part 11 of the operating lever 5 comes into contact with the left end surface 10a.
and; a spring 13 inserted between the right end surface 10b of the adjustment block 10 and the right side plate portion 12 of the casing 1 to urge the latch 8 to protrude leftward; One set of two sides are parallel to the front plate part 3, and another set of two sides are formed in a rectangular shape at right angles to the front plate part 3, and the outer shape of the latch 8 in the vertical section is set to the left side opening. A push latch device is formed to match the portion 7 and pass through the cutout portion 27 of the latch 8 in the front-back direction.