JPH0424557Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field of the invention The invention relates to an opening/closing device that opens and closes an opening formed in a casing of a magnetic tape device or the like in order to take in and take out articles. The present invention relates to an opening/closing device that can perform smooth opening/closing operations using a tensile force.

(b) Prior Art and Problems FIG. 1 is a perspective view of a housing 1 of a magnetic tape device using a cassette, which is newly being developed by the inventors of the present application. In the figure, reference numeral 2 denotes an opening formed in the casing, and is provided for taking articles (magnetic tape cassettes) in and out. The casing 1 is provided with an opening/closing device that opens and closes the opening 2 in order to prevent dust from entering the inside of the casing 1 through the opening 2. Such an opening/closing device under development is
It is constructed as shown in FIGS. 2 and 3.

FIG. 2 is a sectional view of the housing 1 showing the structure of an opening/closing device for a magnetic tape device currently being developed by the inventors of the present application, and FIG. 3 is a front view showing the shutter section 3. As shown in FIG.
In these figures, the opening 2 shown in FIG. 1 corresponds to between A and B, and FIG. 2 shows the opening 2 in an open state. As shown in the third figure, the shutter part 3 is made of a flexible material such as a translucent polyester film so that the inside of the housing 1 can be seen through, and the size of the shutter part 3 is the same as the size of the opening 2 of the housing 1. are set accordingly. Bands 4 and 4' are formed integrally with the shutter part at both ends of one end of the shutter part, and the opening 5 defined by these bands 4 and 4' and the shutter part 3 move. Then, the opening 2 is opened and closed. The band 4 is connected via a detection piece 6 to one end of a belt 7 made of a flexible material with relatively strong tensile strength, and the other end of the belt 7 is connected to one side end of the shutter section 3. Further, the belt 4' is also connected to one end of the belt 7' via a detection piece in the same manner as described above, and the other end of the belt 7 is connected to the other side end of the shutter portion 3. In this way, both sides of the opening/closing device have the same configuration, and only the configuration of one side will be described below. A system consisting of a shutter section 3, a band 4, a detection piece 6, and a belt 7 is a drive section 8 that drives the belt 7.
is held in a loop shape by three pulleys 9a, 9b, and 9c rotatably attached to the inner wall of the housing 1, and the detection piece 6 is held in a loop shape by a guide plate 10 as shown in FIG. movement in the left and right directions is restricted. A reinforcing rod 11 made of vinyl chloride, for example, and a reinforcing plate 12 are fixed to the back surface of the shutter section 3, and rollers 13 are rotatably attached to both ends of the reinforcing rod 11. A guide plate 14 is fixed to the inner wall of the housing 1 so as to be in contact with the roller 13, and the shutter portion 3 is strengthened against external loads by the reinforcing rod 11, the reinforcing plate 12, and the guide plate 14. It is maintained. In addition, micro switches 15a and 15b are installed on the inner wall of the housing 1 to stop the rotation of the drive unit 8 when the opening and closing of the opening 2 are completed.
is installed, and the micro switch 15a,
15b is arranged to be switched by the detection piece 6. Furthermore, stoppers 16 and 17 are attached to the inner wall of the housing 1 to stop the shutter section 3 at the position where the opening/closing section 2 is completed.

With this configuration, when closing the opening 2,
By rotating the drive section 8, a loop-shaped system consisting of the shutter section 3, the band 4, the detection piece 6, and the belt 7 moves along the pulleys 9a, 9b, 9c.
When the opening part 2 is completely closed by the shutter part 3 by rotating clockwise with respect to the figure, the detection piece 6
The lower end comes into contact with the micro switch 15b, turning on the switch 15b, the drive section 8 stops, and the upper end of the shutter section 3 comes into contact with the stopper 16, causing the shutter section 3 to mechanically stop and the opening 2 to open.
is closed. Also, when opening the opening 2,
The drive unit 8 moves the shutter unit 3, the band 4, the detection piece 6,
A loop-shaped system consisting of the belt 7 and the pulley 9
When the detection piece 6 is rotated counterclockwise with respect to FIG. the switch turns on,
When the drive section 8 stops, the upper end of the detection piece 6 comes into contact with the stopper 17, the shutter section 3 stops mechanically, and the opening section 2 opens. At this time, the drive section 8 is caused to move the shutter section 3 due to the delay in operation of the micro switches 15a, 15b and the inertial force of the drive section 8.
Even after being mechanically stopped by the stoppers 16 and 17, there may be cases where the rotating force remains. In this case, when closing the opening 2, the opening 2 is also attached to the band 4, the detection piece 6, and the belt 7 located in the section from the stopper 16 to the driving unit 8 in the driving direction of the driving unit 8, that is, clockwise. When opening, the stopper 17 for the drive direction of the drive unit 8, that is, counterclockwise rotation.
Tensile stress acts on the band 4, the shutter section 3, and the belt 7 located in the section from the drive section 8 to the drive section 8.

Here, the shutter portion 3 and the band 4 are integrally formed of a translucent flexible material such as polyester film, and are thin so as not to cause plastic deformation when bent along the pulleys 9a, 9b, and 9c. is formed. This is because if a polyester film or the like is made thicker, plastic deformation may occur during bending.

For this reason, the shutter portion 3 and the band 4 are extremely weak against tensile stress, and when tensile stress is applied to the shutter portion 3 and the band 4 as described above, the shutter portion and the band 4 may stretch or Alternatively, the opening/closing device may not be able to open and close smoothly due to unevenness in the shutter portion 3 and the band 4, or the shutter portion 3 may come into contact with the stopper 16 when closing the opening 2. , opening 2
The shutter part 3 vibrates when the shutter is closed, resulting in an unfavorable appearance.

Incidentally, in order to solve the above-mentioned drawbacks, it is possible to form the band 4 from a flexible material with relatively strong tensile strength like the belt 7, but in this case, the connecting part between the band 4 and the shutter part 3 is caught by the pulley 9a, making it impossible for the opening/closing device to perform smooth opening/closing operations.

(c) Purpose of the invention The present invention was created in view of the above-mentioned drawbacks of the product under development.
The object of the present invention is to provide an opening/closing device that can prevent a loop-shaped system consisting of a belt and a belt from stretching and from forming unevenness in the system.

(d) Structure of the invention In order to achieve the above object, the invention includes a shutter formed of a flexible member for opening and closing an opening/closing part formed in a housing, and both ends of which are connected to both ends of the shutter. an opening/closing device comprising: a belt; a drive unit that engages with the belt and drives the shutter by feeding the belt; and a stopper that stops the shutter at respective positions where the opening and closing of the opening are completed. In the apparatus, the stopper is provided at a position such that the belt is always disposed between the driving part and the stopper, and an engaging member that engages with the stopper is connected to the belt or the belt. It is characterized in that it is provided at a connection portion with the shutter.

(e) Embodiment of the invention Hereinafter, an embodiment of the invention will be described in detail using drawings.

FIG. 4 is a cross-sectional view of the casing 1 showing the structure of the opening/closing device according to the present invention, and parts given the same reference numerals as in FIG. 2 indicate equivalent functions. The only difference between the figure and FIG. 2 is the position of the stoppers 16 and 17, and both sides of the opening/closing device according to the present invention have the same structure. The opening 2 shown in FIG. 1 corresponds to between C and D, and the figure shows the opening 2 in an open state. In this embodiment, the stoppers 16 and 17 are configured based on the opening/closing position of the opening/closing device so that when the opening 2 is opened, the lower end of the shutter section 3 comes into contact with the stopper 17, and when the opening 2 is closed, the stoppers 16 and 17 are detected. The bottom end of piece 6 is stopper 16
stoppers 16 and 17, respectively, in contact with
The position of is set.

With this configuration, when opening/closing the opening 2, in the same way as shown in FIG. 2, when closing the opening 2, the shutter section 3, band 4, When the loop-shaped system consisting of the strip 6 and the belt 7 is rotated clockwise with respect to FIG. , the lower end of the detection piece 6 contacts the micro switch 15b, turning on the switch 15b, the drive section 8 stops, and the lower end of the detection piece 6 contacts the stopper 16, causing the shutter section 3 to mechanically stop. The opening 2 is then closed. In addition, when opening the opening 2, the drive section 8 moves a loop-shaped system consisting of the shutter section 3, the detection piece 6, and the belt 7 to the pulley 9a,
9b and 9c, and when the opening 2 is completely opened by the opening 5, the upper end of the detection piece 6 touches the micro switch 1.
5a, the switch turns ON, and the drive unit 8
At the same time, the lower end of the shutter section 3 comes into contact with the stopper 17, and the shutter section 3 is mechanically stopped and the opening section 2 is opened.

According to this configuration, the shutter section 3 is connected to the stopper 1.
After being mechanically stopped at steps 6 and 17, even if the drive section 8 has rotational force due to the delay in operation of the microswitches 15a and 15b and the inertia of the drive section 8, the opening 2 will not open. Only the belt 7 is located in the section from the stopper 17 to the drive unit 8 in the drive direction of the drive unit 8 when closing, that is, clockwise. Stopper for surroundings 17
Belt 7 is located in the section from to drive unit 8.
Only. Therefore, the drive section 8 and the stopper 1
6 or between the drive section 8 and the stopper 17 acts only on the relatively tensile belt 7, so that the loop-shaped system consisting of the shutter section 3, the band 4, the detection piece 6, and the belt 7 stretches. In addition, the opening 2
Since the detection piece 6 comes into contact with the stopper 16 when the opening 2 is closed, the shutter section 3 does not vibrate and spoil the appearance when the opening 2 is closed.

Note that the shutter according to the present invention is not limited to the above-mentioned embodiments, and the belt 7 is always disposed in the section from the stopper 16 or 17 to the drive unit 8 in the direction in which the drive unit 8 is driving. The positions of the stoppers 16 and 17 may be set so that

(f) Effect of the invention As explained in detail above, according to the shutter according to the invention, the stopper is provided at a position where the belt is always arranged between the drive part and the stopper. The resulting tensile stress acts only on the belt, and the loop-shaped system consisting of the shutter section, the band, the detection piece, and the belt does not stretch or become uneven, thereby improving durability.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a casing of a magnetic tape device, etc., Fig. 2 is a sectional view of the casing showing the structure of a switchgear under development, Fig. 3 is a front view showing the shutter section, and Fig. The figure is a sectional view of a casing showing the structure of the opening/closing device according to the present invention. In the figure, 1 is a housing, 2 is an opening, 3 is a shutter part, 4 is a band, 5 is an opening, 6 is a detection piece, 7 is a belt, 8 is a drive part, 9a, 9b, 9c are pulleys,
15a and 15b are micro switches, 16 is a stopper, and 17 is a stopper.

Claims (1)

[Claims for Utility Model Registration] Shutters 3, 4, 11 formed of flexible members for opening and closing the opening/closing part 2 formed on the casing 1,
12, 13, a belt 7 whose both ends are connected to both ends of the shutters 3, 4, 11, 12, 13, and by engaging with the belt 7 and feeding the belt 7, the shutters 3, 4, 11, 12, 13; and stoppers 16, 17 that stop the shutters 3, 4, 11, 12, 13 at respective positions where the opening/closing of the opening 2 is completed. The stoppers 16 and 17 are always connected to the belt 7 between the drive section 8 and the stoppers 16 and 17.
and an engaging member that engages with the stopper is provided at a connecting portion between the belt or the belts 16, 17 and the shutters 3, 4, 11, 12, 13. A switchgear characterized by: