JP3768096B2 - Box lifting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for raising and lowering a box, and more particularly to a recording or reproducing apparatus for raising and lowering a box containing a recording / reproducing unit.
[0002]
[Prior art]
FIG. 9 is a plan view of a known cartridge (6). The cartridge (6) accommodates the disk (60) rotatably, and the disk (60) is exposed by opening a shutter (61) slidably provided on the upper surface.
FIG. 10 is a plan view of a recording or reproducing apparatus previously proposed by the applicant, and FIG. 11 is a side view of FIG. 10 viewed from the direction A (see Japanese Patent No. 30810501). A cabinet (70) is covered on the chassis (7), and the box (5) is arranged so as to be movable up and down along the vertical holes (71) (71) (71) established in the cabinet (70). In the cabinet (70), a plurality of holders (2) (2) into which the cartridge (6) is respectively inserted are arranged in the upper and lower stages, and in the following description, the cartridge (6) is inserted into the holder (2). The direction to be discharged is defined as the front, and the direction discharged from the holder (2) is defined as the rear. The cartridge (6) is conveyed from the holder (2) into the box (5), and a signal is recorded or reproduced in the box (5) as described later.
[0003]
On the chassis (7), a motor (M), a gear train (72) connected to the motor (M), and a slide member (75) that meshes with the gear train (72) and contacts the side surface of the cabinet (70) are provided. In the gear train (72), an intermediate gear (73) having a plurality of holes (74) (74) is provided along the circumferential direction. The slide member (75) is provided with a cam groove (77) into which the protrusion (50) provided on the box (5) is fitted. When the slide member (75) is driven back and forth, the cam groove (77) and The box (5) moves up and down along the vertical holes (71) (71) (71). The cam groove (77) has four horizontal portions (77a) (77a) (77a) (77a) and three inclined portions (77b) (77b) connecting the horizontal portions (77a) (77a) (77a) (77a). 77b) (77b) is provided, and when the projection (50) of the box (5) reaches the horizontal part (77a) of 1, the box (5) corresponds to the horizontal part (77a) (77a) (77a) Stop at the lifted position. The intermediate gear (73) is covered with detection means, specifically, a sensor (SE). When the sensor (SE) detects passage of the hole (74) when the intermediate gear (73) rotates, the box (5 ) Is detected to have reached each lift position.
[0004]
When carrying the box (5) to a predetermined lift position, the following procedure is taken. First, the motor (M) is energized to rotate the gear train (72) and drive the slide member (75). The sensor (SE) detects the passage of the hole (74) and cuts off the energization of the motor (M), but the intermediate gear (73) rotates excessively due to the inertia of the motor (M). The box (5) passes through a predetermined lift position. Next, the motor (M) is reversed at a low voltage, and when the sensor (SE) detects the hole (74) again, the energization of the motor (M) is cut off. That is, when the box (5) is transported to a predetermined lift position, the motor (M) is rotated forward and reverse once.
[0005]
[Problems to be solved by the invention]
In the conventional apparatus, each time the box (5) is moved up and down, the motor (M) must be rotated forward and backward, and a program for a microcomputer (not shown) that controls the motor (M). The configuration was complicated. In view of this point, even if the horizontal portion (77a) of the cam groove (77) is lengthened and the intermediate gear (73) overruns due to the inertia of the motor (M), the protrusion (50) remains in the horizontal portion (77a). It is also conceivable to use a configuration located within the brackets. However, in this case, since the cam groove (77) becomes large, the slide member (75) also becomes large, leading to an increase in the size of the entire apparatus.
An object of the present invention is to simplify a mechanism for raising and lowering a box while preventing an increase in size of the apparatus.
[0006]
[Means for solving the problems]
A moving member having a cam surface having a notch is provided between the motor and the slide member, and the chassis has a protruding shaft that fits in the notch of the cam surface and rotates in a plane substantially parallel to the chassis. A switching lever is provided for moving and operating the detection means.
When the protruding shaft of the switching lever fits into the notch on the cam surface, the box stops at the lifted position, and the switching lever applies a heavy load to the moving member while operating the detection means.
[0007]
[Action and effect]
In the lifting device according to the present invention, even when the moving member tries to move further from the state where the box has reached the lifting position due to the inertia of the motor when the box is raised and lowered, the protruding shaft of the switching lever is notched on the cam surface. Since the projection shaft of the switching lever comes into contact with the wall in the notch of the cam surface, the moving member is heavily loaded so that the moving member is not moved and the movement of the box is restricted. The Thereby, it becomes possible to stop a box body correctly in a raising / lowering position. Therefore, unlike the conventional lifting device, there is no need to perform forward and reverse rotation of the motor every time the box is raised or lowered to accurately stop the box at the raising / lowering position. The configuration is simplified.
Also, like other conventional lifting devices, the horizontal part of the cam groove provided in the slide member is lengthened to accurately stop the box at the lifting position, and the intermediate gear overruns due to the inertia of the motor. However, when the projection of the box is configured to be positioned in the horizontal portion, the cam groove for guiding the raising and lowering of the box has been enlarged. However, in the lifting device according to the present invention, Since it is not necessary to use a configuration, it is possible to contribute to downsizing of the apparatus.
In addition, the projecting shaft of the switching lever abuts against the wall in the notch of the cam surface and moves not only in the traveling direction of the moving member but also in the reverse direction as a reaction of this abutment. A heavy load is applied to the member. Therefore, it can regulate so that it may not reverse from the state where the box reached the raising / lowering position, and it becomes possible to stop the box at the raising / lowering position more correctly.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
(overall structure)
Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view showing a schematic configuration of a recording or reproducing apparatus. In the cabinet (70), there are provided a stocker (1) placed on the chassis (7) and a box (5) which is positioned in front of the stocker (1) and moves up and down. In the box (5), a recording / reproducing unit (4) and a carriage (3) that moves up and down with respect to the recording / reproducing unit (4) are provided. The stocker (1) is configured by arranging a plurality of holders (2) and (2) respectively holding the cartridge (6) in the upper and lower stages. The cartridge (6) moves back and forth with the holder (2). The box (5) moves up and down, and the carriage (3) faces the holder (2). This example is characterized by a mechanism for raising and lowering the box (5).
[0009]
A driving mechanism (100) for conveying the cartridge (6) and the holder (2) is provided on the top plate of the stocker (1), and the cartridge (6) inserted into the holder (2) by the driving mechanism (100). ) Is once stored in the stocker (1) and then protrudes from the front surface of the holder (2). The cartridge (6) protruding from the front surface of the holder (2) is drawn into the carriage (3) by a feed mechanism (not shown) in the carriage (3), and the carriage (3) is directed to the recording / reproducing unit (4). And descend.
[0010]
FIG. 2 is a cross-sectional side view of the carriage (3) and the recording / reproducing unit (4). The shutter (61) of the cartridge (6) is opened in the carriage (3). The recording / reproducing unit (4) has a recording head (41), a pickup (42), and a turntable (43) on a base (40) as is well known, and a disk in a cartridge (6) housed in a carriage (3). (60) is rotated by a turntable (43), and a signal is reproduced by a pickup (42). The recording head (41) contacts the disk (60) through the transparent window (30) provided in the carriage (3), and a signal is recorded while the pickup (42) irradiates the beam.
[0011]
FIG. 3 is an exploded perspective view of a mechanism for raising and lowering the box (5), and does not show the stocker (1). Vertical holes (71) and (71) are formed in the side surface of the cabinet (70), and plate-like slide members (75) and (76) are arranged inside the side surface so as to be movable back and forth. The slide member (75) has three horizontal portions (77a) (77a) (77a) having different heights, and inclined portions (77b) (77b) connecting the horizontal portions (77a) (77a) (77a). The cam groove (77) is formed, and the protrusions (50) and (50) provided on the side surface of the box (5) fit into the cam groove (77) and the vertical hole (71). Since the protrusion (50) is positioned at each horizontal portion (77a), the box (5) is arranged at three lift positions corresponding to the horizontal portion (77a), that is, the lowest position, the middle position, and the highest position. Is done.
[0012]
On the chassis (7), a moving member (8) having an open central portion is provided so as to be rotatable in a plane substantially parallel to the chassis (7) about the pivot (8a). On the outer periphery of 8), a tooth surface (84) is formed in an arc shape. A cam surface (80) having a plurality of notches (82), (82), (82) and (82) in FIG. ) Is formed. A shaft (85) protruding upward from both ends of the moving member (8) is fitted into a long hole (78) formed in the slide member (75). A motor (M) and a gear train (72) connected to the motor (M) are provided on the chassis (7), and a gear located at the downstream end of the gear train (72) is connected to the moving member (8). It meshes with the tooth surface (84).
[0013]
When the motor (M) is energized, the moving member (8) rotates about the pivot (8a), and the slide members (75) and (76) move back and forth opposite to each other. The box (5) moves up and down along the cam groove (77) and the vertical hole (71). When the moving member (8) is rotated by one pitch between the notches (82) and (82) from the state where the box (5) is at the predetermined lift position, the box (5) is moved to the next lift position. Go up and down.
On the inside of the moving member (8) on the chassis (7), the base end portions of the switching levers (9) and (90) that overlap each other are pivotally supported (93), and the distal ends of the switching levers (9) and (90) The projecting shafts (91) and (91) are provided downward on the part. Both switching levers (9) and (90) are provided so as to be rotatable in a plane substantially parallel to the chassis (7). The projecting shafts (91) and (91) extend through the arc hole (79) on the chassis (7) to the back side of the chassis (7), and are pushed onto the rotation transition path of the projecting shaft (91). First and second switches (SW1) (SW2) that are turned on are provided.
[0014]
8 (a) and 8 (b) are plan views showing the positional relationship between the projecting shaft (91) and the notch (82), and FIG. The state in contact with (81) and (b) show the state in which the protruding shaft (91) is fitted in the notch (82), respectively. The notch (82) is surrounded by two end edges (83) (83) inclined with respect to the circular arc surface (81) so as to approach the tip. In a state where the projecting shaft (91) is in contact with the circular arc surface (81), the projecting shaft (91) does not press the switch (SW1), and the switch (SW1) is OFF. The projecting shaft (91) fits into the notch (82), and the switch (SW1) is pressed to turn it ON.
[0015]
(Elevation position)
FIG. 4 is a plan view of the chassis (7) and does not show the box (5). FIG. 5 is a side view of FIG. 4 viewed from the B direction. In FIGS. 4 and 5, the box (5) is arranged at the middle elevation position. A tension spring (92) is installed on both switching levers (9) and (90), and both switching levers (9) and (90) are biased in a direction in contact with the cam surface (80) of the moving member (8). . In the state where the box (5) is disposed at the middle position, the switching levers (9) and (90) have the protruding shafts (91) and (91) fitted into the notches (82) and (82). Thus, the projecting shafts 91 and 91 are rotated in the direction in which the distance between the projecting shafts 91 and 91 increases, and the projecting shafts 91 and 91 are turned on by pressing both switches SW1 and SW2. As will be described later, at each lift position, one of the projecting shafts (91) is fitted in the notch (82), and any one of the switches (SW1) (SW2) is turned on.
[0016]
The case where the box (5) is lowered to the lowest position from the state shown in FIG. 4 will be described. The motor (M) is energized to rotate the moving member (8) clockwise. As shown in FIG. 6, the slide members (75) and (76) move, and the box (5) moves along the inclined portion (77b) and the vertical hole (71) as shown in FIG. It descends until it reaches part (77a).
In the upper switching lever (9), the projecting shaft (91) contacts the arc surface (81) of the cam surface (80), moves away from the first switch (SW1), and turns off the switch (SW1) (FIG. 8 (a)). On the other hand, in the lower switching lever (90), the projecting shaft (91) is fitted in the adjacent notch (82), and the second switch (SW2) is pushed in to be turned on.
When the box (5) is raised to the uppermost position from the state shown in FIG. 4, the moving member (8) is rotated counterclockwise, that is, the operation opposite to that shown in FIGS. I do. Although not shown, the upper switching lever (9) has a protruding shaft (91) fitted into the notch (82), and the first switch (SW1) is pushed in to turn it ON, and the lower switching lever (90) is protruding. The shaft (91) is in contact with the circular arc surface (81), moves away from the second switch (SW2), and is turned OFF. The elevation position of the box (5) and the ON / OFF relationship of both switches (SW1) (SW2) are shown in FIG. That is, by confirming the ON state of both switches (SW1) and (SW2), the elevation position of the box (5) can be confirmed.
[0017]
(Configuration to apply load to moving member)
As described above, the switching lever (9) is biased to the arc surface (81) by the tension spring (92), and the projecting shaft (91) is brought into contact with the arc surface (81) as shown in FIG. 8 (a). Touch with an urging force N. If the friction coefficient between the moving member (8) and the projecting shaft (91) is μ, the moving member (8) may be rotated by a force against the frictional force μN, and the moving member (8) is negligible. Light load is applied. However, when the protruding shaft (91) is fitted in the notch (82) and is in contact with the edge (83), the moving member (8) is biased by the protruding shaft (91) in addition to the frictional force μN. A driving force is required to push it against N and escape from the notch (82).
As a result, the moving member (8) moves from the state in which the protruding shaft (91) presses the switch (SW1), that is, the state in which the box (5) is temporarily stopped at the predetermined lift position, and the box ( When 5) is used for raising and lowering, a heavier load is applied to the moving member (8) than when the protruding shaft (91) is in contact with the circular arc surface (81).
[0018]
Therefore, even when the moving member (8) is not rotated from the state where the box (5) reaches the lifted position due to the inertia of the motor (M) when the box (5) is lifted or lowered, the switching lever (9) The cam surface (80) imposes a heavy load on the moving member (8) and restricts the rotation. Thereby, the box (5) stops accurately at the lift position.
It is not necessary to perform normal rotation and reverse rotation of the motor (M) every time the box (5) is moved up and down as in the conventional apparatus, and the program configuration of the microcomputer that controls the motor (M) is simplified. Further, the cam groove (77) for guiding the raising and lowering of the box (5) is not enlarged, which can contribute to downsizing of the apparatus.
If the width L of the notch (82) shown in FIG. 8 (a) is formed shorter than the length of the horizontal portion (77a) of the cam groove (77), the projecting shaft (91) is fitted into the notch (82). When the switches (SW1) and (SW2) are turned on, the protrusion (50) of the box (5) is securely fitted into the horizontal portion (77a).
In the above example, the device for recording and reproducing the signal using the cartridge (6) as the recording medium is shown as the device for raising and lowering the box (5). However, the present invention is not limited to this. The configuration of the present invention can be applied to an apparatus provided with means for detecting a position.
[0019]
The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. In addition, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.
[Brief description of the drawings]
FIG. 1 is a side view showing a schematic configuration of a recording or reproducing apparatus.
FIG. 2 is a sectional side view of a carriage and a recording / reproducing unit.
FIG. 3 is an exploded perspective view of a mechanism for raising and lowering a box.
FIG. 4 is a plan view of the chassis showing the middle position of the box.
FIG. 5 is a side view of FIG. 4 viewed from the B direction.
FIG. 6 is a plan view of the chassis, showing the lowermost position of the box.
7 is a side view of FIG. 6 viewed from the B direction.
FIGS. 8A and 8B are plan views showing the positional relationship between the projecting shaft and the notch, where FIG. 8A shows a state in which the projecting shaft is in contact with the arc surface of the cam surface, and FIG. 8B shows that the projecting shaft fits into the notch. Each state is shown.
FIG. 9 is a plan view of the cartridge.
FIG. 10 is a plan view of a conventional recording or reproducing apparatus.
11 is a side view of FIG. 10 viewed from the direction A. FIG.
FIG. 12 is a table showing the box position and the ON / OFF relationship of both switches.
[Explanation of symbols]
(3) Carriage
(4) Recording / playback unit
(5) Box
(7) Chassis
(8) Rotating member
(9) Switching lever
(75) Slide member
(80) Cam surface
(92) Tension spring

Claims (3)

An elevating apparatus in which a slide member that is driven by a motor to move back and forth on a chassis, a box body that is driven to move up and down linked to the slide member, and a detection means that detects an elevating position of the box body are provided. A moving member having a cam surface having a notch is provided between the motor and the slide member;
The chassis has a projecting shaft that fits in the notch of the cam surface, and is provided with a switching lever that rotates in a plane substantially parallel to the chassis and operates the detection means.
When the protruding shaft of the switching lever is fitted in a notch in the cam surface, the box is stopped at the lifted position, and the switching lever applies a heavy load to the moving member in a state where the detecting means is operated. Lifting device characterized by the above.   The elevating device according to claim 1, wherein the detecting means is a switch that is pushed into the switching lever, and the switching lever is biased by a spring and presses and contacts the cam surface.   The elevating apparatus according to claim 1 or 2, wherein the box body includes a recording / reproducing unit and a carriage that accommodates a cartridge placed on the recording / reproducing unit and is arranged to be movable up and down with respect to the recording / reproducing unit. .

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