JPH0958089A - Opening and closing mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To open and close two respective mechanism parts which are closably fitted to a standard mechanism part and consist of the upper and lower steps by operation of the lower limit and also to reduce parts. SOLUTION: The upper step mechanism part 2 and the lower step mechanism part 3 which are closably fitted to a standard mechanism part 1 are connected by a link 7 whose one side is formed into a long hole shape. When the mechanism part 3 is opened, the mechanism part 2 is simultaneously opened by the link 7. The individual mechanism part is opened and closed alike by operation of the lower limit. A lock mechanism is fitted to only the mechanism part 2 and the mechanism part 3 is sandwiched between the mechanism 2 and the standard mechanism part 1. Thereby, the lock mechanism is made one and reduction of parts is enabled.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an opening / closing mechanism,
In particular, the present invention relates to an opening / closing mechanism in which a mechanism unit provided in two stages above a fixed reference mechanism unit performs an opening / closing operation in a printer or the like.

[0002]

2. Description of the Related Art In a conventional opening / closing mechanism, as shown in FIG. 3, a lock mechanism 6 and a lock mechanism 5 are individually provided in two mechanism parts 2 and 3 which are attached to a fixed reference mechanism part 1 so as to be freely opened and closed.
have. The mechanical units 2 and 3 are respectively the reference mechanical unit 1.
The shafts 12 and 13 provided at the center of the shaft rotate to open and close. The shaft 13 is located on the front side of the shaft 12, and when it is closed by the mechanism unit 2, the mechanism unit 3 is also closed and the latter half of the mechanism unit 3 is sandwiched between the front half of the mechanism unit 2 and the reference mechanism unit 1. Therefore, the mechanical parts 2 and 3 form an upper stage and a lower stage.
The lock mechanism 5 fixes the mechanism unit 3 in a closed state by locking the tip of a lever rotatably attached to a shaft 35 provided in the mechanism unit 3 with a pin 15 provided in the reference mechanism unit 1. . The lock mechanism 6 is a shaft 2 provided in the mechanism unit 2.
6 is engaged with the pin 16 provided on the reference mechanism unit 1 by engaging the tip of a lever rotatably attached to the mechanism unit 2
Fixed in the closed position.

The operation of the opening / closing mechanism shown in FIG. 3 is shown in FIG.
It shows in (B).

FIG. 4A shows a state in which the mechanism section 2 is opened and closed. To open and close the mechanism unit 2, the lock mechanism 6 is removed from the pin 16 of the reference mechanism unit 1, and the front portion of the mechanism unit 2 is held and opened and closed by hand.

FIG. 4B shows the opening / closing operation of the mechanical section 3.

As an order of opening the mechanical portion 3, first, referring to FIG.
The mechanism unit 2 is opened as shown in (A).

Next, the lock mechanism 5 is attached to the pin 1 of the reference mechanism section 1.
Remove from 5, and open the mechanical part 3. When closing these, the reverse operation is performed as it is, and the lock mechanisms 5 and 6 are finally locked to the pins 15 and 16.

That is, in order to open / close the mechanism portion 2, the opening / closing operation can be performed only by releasing the lock mechanism 4. In order to open the mechanism section 3, first, the opening operation of the mechanism section 2 must be performed, and then the lock mechanism 5 must be released to open the mechanism section 3. On the contrary, in order to close the mechanism unit 2 in this state, the mechanism unit 3 must first be closed.

[0009]

In the above-mentioned conventional opening / closing mechanism, each opening / closing mechanism has a separate lock mechanism, which increases the number of parts. In addition, when opening and closing the mechanism part forming the lower stage, the opening and closing of the mechanism part forming the upper stage is involved, so that there is a problem that an extra operation must be performed.

[0010]

An opening / closing mechanism of the present invention is an upper stage which is rotatably attached to a reference mechanism portion and a first shaft provided in the reference mechanism portion to open and close with respect to the reference mechanism portion. A mechanical unit and a second shaft rotatably attached to the reference mechanical unit, and at least a part of the upper mechanical unit is rotatably attached to the reference mechanical unit when the upper mechanical unit is closed. Lower mechanism part that is fixed to a closed state by being pressed by a lock mechanism, and a lock mechanism that can fix the upper mechanism part in a closed state, and the lower mechanism part (or the upper mechanism part)
An elongated hole that is rotatably attached to a shaft provided in the upper stage mechanism part (or the lower stage mechanism part) and into which a pin is inserted is provided, and when the lower stage mechanism part is opened, the upper mechanism part is opened. With links.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a schematic side view of an opening / closing mechanism according to an embodiment of the present invention.

The opening / closing mechanism of this embodiment is roughly classified into a reference mechanism section 1, a mechanism section 2, a mechanism section 3, a lock mechanism 4, and a link 6.
Consists of The reference mechanical unit 1, the mechanical units 2 and 3 are shown in FIG.
Is the same as that shown in. The lock mechanism 4 fixes the mechanism portion 2 in a closed state by locking the tip of a lever rotatably provided on a shaft 24 provided in the mechanism portion 2 with a pin 14 provided in the reference mechanism portion 1. . At this time, the mechanical unit 3
Is also pressed by the mechanism unit 2 and fixed in the closed state. The link 7 is rotatably attached to a shaft 37 provided in the mechanism portion 3, and a pin 27 provided in the mechanism portion 2 is inserted into an elongated hole 71 provided in a portion opposite to the shaft 37. With the mechanism portion 2 closed, the pin 27 is located at the end of the elongated hole 71 on the side closer to the shaft 37.

2A and 2B are views for explaining the operation of the opening / closing mechanism shown in FIG. In the normal closed state, as shown in FIG. 1, the mechanism unit 2 sandwiches the mechanism unit 3 with the reference mechanism unit 1 and is connected to the reference mechanism unit by the lock mechanism 4 in addition to the shaft 12. Further, the mechanism unit 2 and the mechanism unit 3 are connected by a link 6. The link 6 has a long hole shape only on the mounting side of the mechanism portion A2.

FIG. 2A shows a state in which the mechanism portion 2 is opened and closed. The lock mechanism 4 is removed from the pin 14 of the reference mechanism portion 1 and the mechanism portion 2 is lifted by hand to perform the opening operation. At this time, the link 7 is rotating around the shaft 37 on the side of the mechanism section 3, but on the side of the mechanism section 2 of the link 7, the pin 27 slides in the elongated hole 71, and the mechanism section 2 moves to the pin 27. Open until the end of the long hole 71 is opposite to the shaft 37. Mechanism part 2
The closing operation of is performed as it is.

FIG. 2B shows a state when the mechanism section 3 is opened and closed. Similar to the mechanism unit 2, by disengaging the lock mechanism A4 and then lifting the mechanism unit 3, the link 7 simultaneously lifts the mechanism unit 2 to perform the opening operation of the mechanism unit 3. The closing operation is the reverse operation as it is.

Instead of the lock mechanism 4, it is possible to use a lock mechanism in which the tip of a lever rotatable about a shaft provided in the reference mechanism section is locked to a pin provided in the mechanism section 2. Instead of the link 7, it is also possible to use a link that is rotatably attached to a shaft provided in the mechanism section 2 and has a long hole through which a pin provided in the reference mechanism section 1 is inserted.

[0018]

As described above, according to the present invention, the upper and lower mechanism parts, which are attached to the reference mechanism part and open and close individually with the center of opening and closing, are connected by the link having a long hole on one side, By providing only the lock mechanism that fixes the mechanism part in the closed state, both the upper and lower mechanism parts release only one lock mechanism (unlock → open mechanism part, mechanism part → lock) Minimal This operation has the effect that it can be opened and closed and the number of parts can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic side view of an embodiment of the present invention.

FIG. 2 is a diagram showing an operation of the opening / closing mechanism shown in FIG.

FIG. 3 is a schematic side view of a conventional opening / closing mechanism.

FIG. 4 is a diagram showing an operation of the opening / closing mechanism shown in FIG.

[Explanation of symbols]

 1 Reference mechanism part 2 Mechanism part 3 Mechanism part 4-6 Lock mechanism 7 Link

Claims (1)

[Claims] 1. A reference mechanism section, an upper stage mechanism section that is rotatably attached to a first shaft provided in the reference mechanism section and opens and closes with respect to the reference mechanism section, and a reference mechanism section. When the upper mechanism is closed by being rotatably attached to the second shaft and opened and closed with respect to the reference mechanism, at least a part of the upper mechanism is pressed by the upper mechanism and fixed in the closed state. A lower mechanism unit, a lock mechanism that can fix the upper mechanism unit in a closed state, and a lock mechanism that is rotatably attached to a shaft provided in the lower mechanism unit (or the upper mechanism unit) and that has the upper mechanism unit (or An opening / closing mechanism including an elongated hole through which a pin provided in the lower mechanism portion is provided, and a link that opens the upper mechanism portion when the lower mechanism portion is opened.