JPH0455302B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a latch mechanism for a vertically split type copying machine. This relates to the improvement of a top and bottom split type copying machine that can be opened and closed to facilitate removal of paper in the event of a paper jam and operations during maintenance. This relates to the latch mechanism.

[Prior art]

In this type of conventional copying machine with upper and lower parts,
As shown in FIG. 1, the machine body is divided into an opening lower part 1 located below and an opening upper part 2 located above this opening lower part 1.
and the opening upper portion 2 are rotatably supported relative to each other by a rotating shaft 3 at one side edge thereof, and
A latch mechanism 4 is provided at the side edge of the open end side of the lower opening part 1 and the upper opening part 2, and by locking and releasing the latch mechanism 4, the upper opening part 2 is opened with respect to the lower opening part 1. , and those designed to close are also known.

However, in the conventional latch mechanism, as shown in FIG. 2, a shaft 5 is rotatably attached to the side edge of the open end side of the opening upper portion 2 along its longitudinal direction, and this shaft 5 includes: A locking pawl 7 having a hook-shaped locking portion 6 is provided at the lower end, and an operating handle 8 is attached to the intermediate portion thereof, and the shaft 5 is biased with an elastic force such as a torsion spring (not shown). 5 rotates in the opposite direction to the arrow direction in the figure, and the locking portion 6 of the locking pawl 7 locks into the locking receiving portion 9 provided in the lower opening portion 1, opening the upper opening portion 2. When the shaft 5 is
The structure was such that the locking claw 7 was rotated in the direction of the arrow in the figure to release the locking of the locking claw 7 from the locking receiving portion 9. Alternatively, as shown in FIG. 3, an operating handle 8 was attached to the end of the shaft 5, and the upper opening portion 2 was opened by the same operation as described above.

Therefore, any of the above-mentioned latch mechanisms 4 are extremely complicated and have poor operability, and if the opening upper portion 2 is bent, the locking pawl 7 may no longer lock into the locking receiving portion 9. Therefore, a shaft 5 that passes through the front and back of the upper opening portion 2 is usually required, and since this is a part that is subject to a certain amount of load, a shaft 5 with a large diameter is used, which has disadvantages such as being expensive. .

[Purpose of the invention]

The present invention has been made with the intention of solving the above problems, and its purpose is to improve the operability of the latch mechanism in a top-bottom split type copying machine, and to manufacture it at low cost. This is intended to provide a latch mechanism that can be used.

[Structure of the invention]

That is, the present invention divides the main body of a copying machine into a lower opening portion and an upper opening portion located above and below,
The lower part of the opening and the upper part of the opening are connected to each other.
In a top and bottom split type copying machine which is rotatably supported on two side edges and formed to be openable and closable, the side edge on the open end side of either the lower opening portion or the upper opening portion has an inner surface. A locking receiving part is provided protrudingly, and a latch plate is provided on the side edge of the open end side of the other opening lower part or the opening upper part to be slidably supported along the longitudinal direction of the inner surface thereof. The latch plate is provided with a locking pawl that can be connected to and detached from the locking receiving part, and the side end of the latch plate has a handle whose middle part is rotatably pivoted to the lower part of the opening or the upper part of the opening. A spring is provided that engages one end and constantly biases the latch plate in the direction in which the locking claw and the locking receiver engage with each other in the handle, and converts the rotational operation of the handle into a linear motion. This invention relates to a latch mechanism for a top-bottom split type copying machine, which is characterized by an easy opening operation.

〔Example〕

Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 4 is a side sectional view showing the attached state of the latch mechanism of the present invention in FIG. 4, and shows the case where the operating part of the latch mechanism is attached to the upper opening portion 2. The latch mechanism of this embodiment includes a latch plate 1 that is slidable along the longitudinal direction of the inner surface of the open end side of the upper opening portion 2.
0, and a locking receiving part 1 which is fixed to the latch plate 10 by means such as screwing, and has a locking part 11a at the tip thereof protruding from the inner surface of the lower part of the opening (not shown).
2, a locking claw 11 that is removable from the opening upper portion 2;
The main part is comprised of a bell crank-shaped handle 13 which is rotatably pivotally mounted on the outer side of the open end of the latch plate 10 and controls the linear movement of the latch plate 10.

The latch plate 10 is connected to the opening upper portion 2.
so that it can slide smoothly along the longitudinal direction of the inner surface of the open end side of the upper opening portion 2 by means of a bearing 15 held between the side edge portion 2a and a bracket 14 fixed to the inner side thereof. It is supported by a spring (not shown) and is constantly pressed to the locked position. Furthermore, a square-shaped through hole 10a as shown in FIG. One end 13 of the handle 13
a is engaged.

As shown in FIGS. 5 and 6, the handle 13 has, for example, a crank-shaped side surface, and its operation side end 13b is bent into a U-shape, so that the handle 13 can be rotated. Pivot part 1 having a mounting hole 13c for a handle pin 16 that can be pivotally mounted
The one end portions 13 each hanging downward from 3d.
a has a stepped portion 13e in the middle thereof, and an arcuate feeding surface 13f that is inserted into the through hole 10a is formed on one side of its tip. In the handle 13 configured in this way, the pivot portion 13d is inserted between the pair of handle stays 17 cut out from the upper opening portion 2, and the pivot portion 13d is inserted into the handle pin 16 passing through the handle stay 17 and the attachment hole 13c. Therefore, it is rotatably pivoted. in this case,
A torsion spring 18 is attached to the handle pin 16.
is wound, and the torsion spring 1
8 is abuttingly engaged with the opening upper portion 2,
Further, the other end 18b is locked to the stepped portion 13e of the handle 13. Therefore, the bias of the torsion spring 18 causes the handle 13 to constantly rotate in the direction of the arrow A, pressing the latch plate 10 in the direction of the arrow A, and also causing the locking pawl 11 and the locking receiving portion 12 to rotate. The engaged state is maintained.

The handle 13 is covered with an L-shaped box-shaped handle cover 19 as shown in FIG.
The handle pin 16 is regulated in the axial direction by a. Therefore, the handle pin 16
There is no need to attach any fixing means such as an E-ring, and it can be easily attached. In addition, in order to prevent the handle 13 from rotating more than necessary when operating and returning the handle 13, a stopper 20 is provided on the pivot portion 13d of the handle 13 and comes into contact with the upper opening portion 2. , a protrusion 21 is provided at the protruding end of the latch plate 10.
is provided.

In the above embodiment, the latch plate 10 having the locking pawl 11 is provided on the opening upper part 12 side, and the locking receiving part 12 is provided protrudingly on the opening lower part 1 side, but this structure is not necessarily applicable. The latch plate 10 may be provided on the opening lower part 1 side, and the locking receiver 12 may be provided protrudingly on the opening upper part 2 side, and the number of locking claws 11 is also two. It is not necessary, and there may be three or more. Also,
The handle 13 need not be in the shape of a bell crank, but may be straight.

In the latch mechanism of the present invention configured as described above, when opening the upper opening portion 2, the handle 13 is moved in the direction of arrow B by holding the operating end of the handle 13 against the torsion spring 18. When rotated, one end 13a of the handle 13 moves the latch plate 10 in the direction of arrow B, and
Since the locking pawl 11, which was in the locked state, is released from the locking receiving portion 12, the opening upper portion 2 can be easily opened in this state.

When the handle 13 is released, the handle 13 returns to its original position due to the elastic force of the torsion spring ring 18, and the latch plate 10
It returns to the locked position due to the elastic force of a spring (not shown) and the elastic force of the torsion spring 18, but the force when closing the upper opening portion 2 causes it to engage with the locking portion 11a of the locking pawl 11. Retainer part 12
becomes locked again.

〔Effect of the invention〕

As explained above, according to the latch mechanism of the present invention, the rotational motion of the handle can be converted into linear motion to release the locked state between the locking pawl and the locking receiver, so that a small force is required. Therefore, the unlocking operation can be performed easily and reliably, and
Since the relatively large diameter shaft does not penetrate the frame as in the conventional case, it is possible to eliminate bending of the upper part of the opening, and it has excellent effects such as being able to reduce weight and cost. Therefore, its utility value is remarkable.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the mounting position of the latch mechanism in a vertically split type copying machine, FIGS. 2 and 3 are schematic perspective views showing the conventional latch mechanism, respectively, and FIG.
5 is a side sectional view showing the installed state of the latch mechanism of the present invention, FIG. 5 is a perspective view showing the engaged state of the latch plate and handle in the present invention, FIG. 6 is a perspective view of the handle in the present invention, and FIG. FIG. 7 is a perspective view of the handle with the handle cover attached to the handle. Explanation of symbols, 1... lower opening part, 2... upper opening part, 10... latch plate, 10a... through hole,
DESCRIPTION OF SYMBOLS 11... Locking claw, 11a... Locking part, 12... Locking receiving part, 13... Handle, 13a... One end of handle 13, 13b... Operation side end of handle 13, 16... Handle pin, 18...Torsion spring.

Claims (1)

[Claims] 1 The main body of a copying machine is divided into a lower opening portion and an upper opening portion located above and below, and the lower opening portion and the upper opening portion are pivotably supported by one side edge thereof to open and close. In the top-bottom split type copying machine, a locking receptacle is provided protruding from the inner surface of the side edge on the open end side of one of the lower opening portion and the upper opening portion, and A latch plate is provided on the side edge of the open end side of the portion or the upper opening portion to be slidably supported along the longitudinal direction of the inner surface thereof, and this latch plate is capable of being engaged with and detached from the locking receiving portion. A locking pawl is provided at the side end of the latch plate, and the handle engages one end of the handle whose middle portion is rotatably pivoted to the lower opening portion or the upper opening portion, and A latch mechanism for a vertically split copying machine, characterized by being provided with a spring that constantly biases a latch plate in a direction in which a locking pawl and a locking receiver engage.