JPH0440372Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a lock stay mechanism that holds a device body, such as a magnetic tape device, housed in a chassis in an upwardly movable manner while opening the device at a predetermined angle from the chassis.

[Prior Art] Figures 4a and 4b are front views showing a conventional lock stay mechanism. As shown in Figure a, the lock stay 30 used in this mechanism includes a hollow outer frame 32 having a fixed part 31 fixed to the chassis on the fixed side, and a lock stay 30 that is vertically movably inserted into the inside of the outer frame 32 and opened on the open side. It consists of an arm 34 having a fixing part 33 that is attached to the main body of the device, and a square protrusion 32a is provided on the inner wall near the upper end of the outer frame 32.
A window hole 32b is bored in one side of the outer frame 32 downward from the lower end position of the protrusion 32a. Furthermore, the lower ends of the arms 34 have notches cut at right angles in their opposing parts, and are provided with stoppers 34a that are rotatable around the center.

The operation of this lock stay 30 is shown in FIG.
When an operation is performed to lift the open side device main body, the arm 34 moves upward. The stopper 34a of the arm 34 connects the notch to the outer frame 3.
It contacts the corner of the second protrusion 32a and rotates 45° to the right.
After that, the main body of the apparatus is moved slightly downward so that the notch of the stopper 34a engages with the window hole 32b of the outer frame 32, and the arm 34 is held in the extended state by the outer frame 32, and the main body of the apparatus is held by this lock stay. At the position of the mechanism 30, it can be opened and held a predetermined distance above the chassis.

[Problems to be solved by the invention] However, according to the lock stay mechanism 30, the protrusion 32a and the window hole 32b must be formed inside the outer frame 32, and the stopper 34a must be provided on the arm 34, and the number of parts is large. , processing and assembly became complicated.

Further, when the stopper 34a rotates a predetermined angle (45°) to hold the arm 34 on the outer frame 32, if the rotation of the stopper 34a is insufficient or excessive, or when the stopper 34a rotates by a predetermined angle (45°),
There was a problem in which the lock was not locked or the lock was released when the rotation angle of a changed.

Further, all the mechanisms for locking the arm 34 to the outer frame 32 are provided inside the outer frame 32, and the state of the locking operation cannot be confirmed.

The present invention was devised to solve the above-mentioned drawbacks, and aims to provide a lock stay mechanism that has a small number of parts, operates reliably, and allows confirmation of the operating status.

[Means for solving problems]

Therefore, as shown in FIGS. 1 to 3, the lock stay mechanism of the present invention has a chassis 3 that forms an outer casing with an open top surface.
and a device main body 2 which is housed in the chassis 3 and whose upper surface is pivotally supported on a corresponding one side of the chassis so that it can be opened and closed vertically; and when the device main body is open. An arm 5 whose upper end is pivoted to the outside of the side wall of the device main body 2 and whose lower end is a free end to maintain the open state, and an arm 5 inserted inside the side wall of the chassis 3; Projected inside the side wall,
A protrusion 6 that comes into contact with the lower edge 5f of the lower end of the arm 5 when the device main body 2 is opened upward, and a recessed notch on the lower edge 5f that comes into contact with the protrusion near the lower end 5b of the arm 5. an engaging groove 5c having a hook-shaped deep groove 5d in which the protrusion 6 is engaged and fitted in the upper part thereof, and an engaging groove 5c in the outer part near the lower end 5b of the arm 5; The configuration is based on the assumption that a guide plate 8 is provided at an upper position so as to be swingable about a pin 7 and is held so as to cover the engagement groove 5c.

The guide plate 8 is held in such a manner that a vertically long cutting groove 8a formed on the plate surface is slidably fitted onto the pin 7.

Further, as shown in FIG.
When the arm 5 is pulled up together with the device main body 2 to position the protrusion 6 at the lower end in the engagement groove 5c, the outer periphery of the guide plate 8 comes into contact with the guide plate 8. When the contact portion 8d contacts the protrusion 6 and pushes up the guide plate 8 above the engagement groove 5c, and pushes down the arm 5 from this position, the protrusion 6 pushes the guide plate 8 upward and pushes the guide plate 8 upward into the engagement groove. 5c (FIG. 3C), and the guide plate 8 is inserted into the deep groove 5d of FIG.
At the position where the lower edge of the cutting groove 8a is slid upward to a position where it abuts the pin 7, the arm 5 is pulled up together with the device main body 2, and the protrusion 6 is moved into the deep groove 5d of the engagement groove 5c. From engagement groove 5
When the guide plate 8 is positioned at the lower end of the guide plate 8 at the lower end thereof, the abutting portion 8d on the outer periphery of the guide plate 8 is shifted upwardly from the protrusion 6, and the arc-shaped guide portion 8c that is continuous with the abutting portion 8d on the outer periphery of the guide plate 8 becomes a protrusion. 6, the locking part 8e protruding from the end of the guiding part 8c abuts and engages with the protrusion 6, stopping the rotation of the guiding plate 8 (see FIG. 3). E) When the arm 5 is lowered together with the device main body 2 from the position where the locking part 8e of the guide plate 8 is abutted and engaged with the protrusion 6, the protrusion 6 moves along the guide part 8c. It is characterized in that a guide plate 8 is formed in an outer peripheral shape that slides and is guided to the lower side of the lower end of the arm 5 from the engagement groove 5c.

[Function] In the above configuration, when the device main body 2 is lifted up to release it from the chassis 3, the arm 5 whose upper end 5a is attached to the device main body 2 has its lower edge 5f protruding. It begins to tilt while touching the top of 6 (see Figure 3 A). At this time, the contact portion 8d of the guide plate 8 comes into contact with the protrusion 6, and this guide plate 8
rotates around the pin 7 portion.

When the main body 2 of the apparatus is further lifted, the engagement groove 5c of the arm 5 engages with the protrusion 6 due to its own weight (the state shown in FIG. 3B). Next, by lowering the device body 2 slightly, the protrusion 6 can be held in the deep groove 5d of the engagement groove 5c of the arm 5, and the device will be in a locked state, allowing the device body 2 to be opened and held against the chassis 3 (see Fig. 3, C). ).

Furthermore, the following procedure is used to store the device main body 2 in the chassis 3.

First, the guide plate 8 is placed in the set position (the state shown in FIG. 3 D). This setting is carried out by manually operating the operating portion 8f of the guide plate 8 to slide the cut groove 8a of the guide plate 8 over the pin 7 and position the pin 7 at the bent portion of the cut groove 8a. At this time, the contact portion 8d of the guide plate 8 comes into contact with the protrusion 6, and the weight of the guide plate 8 is added to the protrusion 6, and the guide plate 8
can provide downward rotational force. After that, if you lift the main body 2 of the device slightly upward, the engagement groove 5 of the arm 5
c moves on the protrusion 6 and further touches the contact portion 8 of the guide plate 8.
d detaches from the projection 6 and passes over the arc-shaped guiding portion 8c, and the locking portion 8e locks onto the projection 6 (state shown in FIG. 3E). When the main body 2 of the apparatus is subsequently lowered, the locking portion 8e of the guide plate 8 remains locked to the protrusion 6, and the guide plate 8 has the effect of lifting the arm 5 upward. After the arm 5 is lifted, the locking portion 8e of the guide plate 8 is such that the protrusion 5e of the engagement groove 5c of the arm 5 is positioned above the protrusion 6 and the protrusion 6 is engaged. Since the locked state continues until the arm 5 is disengaged from the engagement groove 5c, the engagement groove 5c of the arm 5 can be disengaged from the protrusion 6, and the locked state can be released (see FIG. 3).

If the device main body 2 is lowered further, the lower edge 5f of the arm 5 slides on the protrusion 6, and the device main body 2 can be stored inside the chassis 3 (the state shown in FIG. 3).

[Example] Hereinafter, the lock stay mechanism of the present invention will be explained in detail based on the example shown in the drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention. In this figure, a lock stay mechanism 1 opens and holds a magnetic tape device main body 2 and a chassis 3 that protects the outside of the device main body 2.
and the chassis 3.

As shown in the side view of the device main body 2 housed in the chassis 3 shown in FIG. The arm 5 is mainly composed of an arm 5 which is in the shape of a flat bar and is rotatably connected via a bar, and whose long side extends in the front-rear direction of the chassis 3 when the device main body 2 is housed inside the chassis 3. Also,
A pin-shaped protrusion 6 is provided that protrudes from the inner wall surface of the chassis 3 on the front side from the center thereof. The other end 5 of this arm 5
b, an engagement groove 5 that engages with the protrusion 6 of the chassis 3;
c is formed. The engagement groove 5c is formed by cutting a plurality of the protrusions 6 in length in the long side direction of the arm 5, and the protrusion 6 can freely move in the engagement groove 5c. Further, the engagement groove 5c has a protrusion in order to prevent the arm 5 from falling off the protrusion 6 when the protrusion 6 stops at the deep groove 5d of the engagement groove 5c and maintains the locked state described below. A piece 5e is provided.

Further, a guide plate 8 is provided at a position inside the position of the engagement groove 5c of the arm 5 and in a direction opposite to the opening direction of the engagement groove 5c, with its rotation center being supported by the pin 7.

The guide plate 8 is a substantially fan-shaped flat plate member, and has a bent portion and a hook-shaped cutting groove 8a formed in the engagement portion with the pin 7, and a cut groove 8a cut into a hook shape at the lower part thereof. It has a circular hole 8b formed in consideration of balance in order to position the guide plate 8 in the illustrated state when stored as shown in FIG. Further, the guide plate 8 is
It has a guiding part 8c whose lower part is formed into an arc shape, and the size of the circular arc of the guiding part 8c is such that the length L from the rotating shaft 7 to the bent part of the cutting groove 8a is the same as that of the protruding piece 5e. The length to the end of the line corresponds to l.

One end of this guiding portion 8c forms an abutting portion 8d cut off in the direction of the center of the arc, and the other end forms a locking portion 8d.
e is provided in a protruding manner. The guiding portion 8c, the abutting portion 8d, and the locking portion 8e of the guiding plate 8 are in contact with the protrusion 6 of the chassis 3. Further, an operating portion 8 is provided slightly above the locking portion 8e to facilitate operation of the guiding plate 8 when setting the guiding plate 8, which will be described later.
f is provided protrudingly.

Next, the operating state of this lock stay 1 will be explained using the operating diagrams shown in FIGS. 2 and 3.

When the device body 2 shown in FIG. 2 is housed in the chassis 3, the arm 5 is in a state in which the lower edge 5f of the arm 5 is in contact with the protrusion 6 of the chassis 3 due to its own weight. .

When the device main body 2 is lifted up to release it from the chassis 3, the device main body 2
The arm 5, to which one end 5a is attached, begins to tilt as the lower edge 5f slides on the protrusion 6, as shown in FIG. 3A. At this time, the contact portion 8d of the guide plate 8 contacts the protrusion 6, and the guide plate 8
Rotate around the part.

When the apparatus body 2 is further lifted, the arm 5 engages the engagement groove 5c with the protrusion 6 due to its own weight, as shown in FIG. 3B. Next, by lowering the device body 2 slightly, the protrusion 6 can be held in the deep groove 5d of the engagement groove 5c of the arm 5, as shown in FIG. can.

Further, the apparatus main body 2 can be housed in the chassis 3 by the following procedure.

FIG. 3D shows the guide plate 8 in the set position, and this setting is done by manually operating the operating part 8f of the guide plate 8 and sliding the pin 7 through the cutting groove 8a of the guide plate 8. 7 is located at the bent portion of the cutting groove 8a. At this time, the contact portion 8d of the guide plate 8 comes into contact with the protrusion 6, and the weight of the guide plate 8 is applied to the protrusion 6, so that the guide plate 8 obtains a downward rotational force. After this, when the main body 2 of the device is lifted slightly upward, the engagement groove 5c of the arm 5 moves on the protrusion 6 as shown in FIG. Arc-shaped guide portion 8c
The locking portion 8e locks onto the protrusion 6. When the apparatus main body 2 is subsequently lowered, the guide plate 8 has its locking portion 8e locked to the protrusion 6, and the guide plate 8 lifts the arm 5 upward. After the arm 5 is lifted, the locking portion 8e of the guide plate 8 is connected to the protrusion 6.
On the other hand, as shown in FIG. 3, the protrusion 5e of the engagement groove 5c of the arm 5 is positioned above the protrusion 6, and the locked state continues until the protrusion 6 is disengaged from the engagement groove 5c. The engagement groove 5c of the arm 5 is connected to the protrusion 6.
The locked state can be released.

If the device main body 2 is further lowered, the lower edge 5f of the arm 5 will slide on the protrusion 6 as shown in FIG.

In order to store the main body 2 of the device in the chassis 3 in this way, the guide plate 8 can be manually operated to the set position, thereby allowing the operator to grasp the operation of the lock stay mechanism 1 and ensuring its operation. be able to.

Moreover, this lock stay mechanism 1 can be provided between the main body 2 and the chassis 3 instead of one.

[Effects of the Invention] As described above, the lock stay mechanism according to the present invention has the advantage that the number of parts is small, the operating state can be visually confirmed, and the operation can be performed reliably. Further, since the locked state can only be released by manual operation by the operator, it has the effect of improving safety.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the lock stay mechanism of the present invention, Fig. 2 is a plan view of the same lock stay mechanism, and Fig. 3 is a perspective view showing the lock stay mechanism of the present invention.
Figures 1 to 4 are operational diagrams of the same lock stay mechanism, and Figures 4a to 4 b are diagrams showing the conventional lock stay. 1...Lock stay mechanism, 2...Device main body, 3
... Chassis, 5 ... Arm, 5a ... Upper end of arm, 5b ... Lower end of arm, 5c ... Engagement groove, 5f
... lower edge, 6 ... protrusion, 8 guide plate, 8e ...
Locking part.

Claims (1)

[Claims for Utility Model Registration] Chassis 3 forming an outer casing with an open top surface
and a device main body 2 which is housed in the chassis 3 and whose upper surface is pivotally supported on a corresponding one side of the chassis so that it can be opened and closed vertically; and when the device main body is open. An arm 5 whose upper end is pivoted to the outside of the side wall of the device main body 2 and whose lower end is a free end to maintain the open state, and an arm 5 inserted inside the side wall of the chassis 3; Projected inside the side wall,
A protrusion 6 that comes into contact with the lower edge 5f of the lower end of the arm 5 when the device main body 2 is opened upward, and a recessed notch on the lower edge 5f that comes into contact with the protrusion near the lower end 5b of the arm 5. an engaging groove 5c having a hook-shaped deep groove 5d in which the protrusion 6 is engaged and fitted in the upper part thereof, and an engaging groove 5c in the outer part near the lower end 5b of the arm 5; A guide plate 8 is provided at an upper position and is held so as to be swingable about a pin 7 and to cover the engagement groove 5c, and the guide plate 8 has a vertical direction formed on its plate surface. A long cutting groove 8a is slidably inserted into the pin 7, and
When the guide plate 8 is slid down to the position where the upper end edge of the cut groove 8a comes into contact with the pin 7, the guide plate 8 is held at the downward sliding position by its own weight, and the guide plate 8 is held in the downward sliding position. When the lower end edge of the cut groove 8a is slid upward to the position where it comes into contact with the pin 7, the pin 7 is engaged in a hook-shaped bent part connected to the lower end edge of the cut groove 8a. Guidance plate 8
is held in the upward sliding position, and in a position where the guiding plate 8 is slid down to a position where the upper end edge of the cutting groove 8a abuts the pin 7, the arm along with the device main body 2 5 to position the protrusion 6 at the lower end in the engagement groove 5c, the abutment plate 8d on the outer periphery of the guide plate 8 abuts on the protrusion 6, moving the guide plate 8 above the engagement groove 5c. When the arm 5 is pushed down from this position, the protrusion 6 pushes the guide plate 8 upward and fits into the deep groove 5d of the engagement groove 5c, pushing the guide plate 8 into the cut groove 8a. At the position where the lower edge of the arm 5 is slid upward to the position where it contacts the pin 7, the arm 5 is pulled up together with the device main body 2, and the protrusion 6 is moved from the deep groove 5d of the engagement groove 5c to the engagement groove 5c. When positioned at the lower end of the guide plate 8, the abutting portion 8d on the outer periphery of the guide plate 8 touches the protrusion 6.
Shifting upward, an arc-shaped guide portion 8c continuous with the abutment portion 8d on the outer periphery of the guide plate 8 rotates downward under its own weight along the protrusion 6, and a locking portion protruding from the end of the guide portion 8c rotates downward under its own weight. The stop portion 8e abuts and engages with the projection 6 to stop the rotation of the guide plate 8, and from the position where the stop portion 8e of the guide plate 8 abuts and engages with the protrusion 6, the guide plate 8 moves together with the device main body 2. When the arm 5 is lowered, the protrusion 6 slides along the guide portion 8c, and the guide plate 8 has an outer peripheral shape that is guided from the engagement groove 5c to the lower edge of the lower end of the arm 5. A lock stay mechanism characterized by the formation of.