JPS5849552A - Variable speed gear for speed of revolution of rotary driving shaft - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a transmission device for changing the rotational speed of a rotary drive shaft.

Before explaining the device according to the present invention, we first explain in what situations the device according to the present invention is suitable for use.
The diagram will be explained. In the figure (11 is a rack, in which a large number of, for example, magnetic tape cassettes (2) are stored side by side. It is assumed that the tapes in these many tape cassettes have already been recorded. (
3) is a device for reproducing signals recorded on magnetic tape, such as a VTR (hereinafter referred to as VTI), in which a plurality of units are installed. ) and VTlt (3), on which a plurality of running bodies (5) run and stop in front of the cassette (2) in rank (11) at a pre-instructed location. Then it takes out the cassette (2), places it there and runs, stops in front of the VTR f3) which was also commanded, stores the placed cassette (2) in V'l''R (31), or Take out the ordered VTla (3), take out the deer cent (2), place it, drive, stop in front of the storage position of the commanded rank (1), and place the cassette (2) in the rack (1). A device that can be stored in a storage space can be considered.

The present invention is suitable for application to such a device, and in particular allows the traveling body (5) to run more smoothly on the rail (4) and to maintain appropriate speed at curves of the rail (4). The attempt was made to run the train without falling and derailing.

In addition, on the rail (4) in FIG. 1, there are two branching points where the traveling body (5) branches to the left or right, and there are also two merging points where the traveling body (5) branches to the left or right. Among these, at the merging point, the vehicle (5) naturally merges as the vehicle (5) travels, but at the branching point, which direction to go is selected based on information commanded in advance. Although this is not directly related to the gist of the present invention, it will become clear from what will be described later.

The apparatus according to the invention will now be described with reference to FIGS. As shown in FIGS. 2 and 3, the rail (4) is connected to the running body (5).
) is composed of a running surface (6) on which the running surface (6) runs, and a guide (force) provided along this running surface (6).

In this example, this guide (7) is constructed by bending both shoulders of the running scythe (6) upward (that is, it has a U-shaped cross section), and therefore the guide (6) consists of a pair. (7a) and (7b). These pair of guides (7a buff b) are for accurately guiding the traveling body (5) onto the rails (4), and serve as guides for the traveling body, but will be referred to as main guides hereinafter for convenience.

Moreover, at the branch point, the traveling body (
5) The guides (8 and 8b) that determine the direction of travel are provided at a certain length.These guides (8a) and (8b) will be referred to as branching guides. (8a) and (8b) are respectively provided parallel to the main guide 7) at a predetermined interval at the above-mentioned branch point.

Next, the traveling body (5) will be explained using FIG. 4 and subsequent figures. In addition, FIG. 4 is a bottom view of the route of the traveling body.

The OI is its main chassis and has a rectangular shape when viewed from above (bottom).
(both side edges along the traveling direction of the traveling body (5)) are bent downward. The arrow indicates this direction of travel. On the downward side of this main chassis (10), there are a total of four guide rollers (hereinafter referred to as main guide rollers) on the front, back, left and right sides (
118) ~(11(') is the axis (12a) ~(1
2d) so that it can rotate around this, and the so-called outer side of these is attached to the rail (
By disposing the main guides (7a) and (7b) in contact with the inner surfaces of the main guides (4), the traveling body (5) is allowed to travel without meandering. In addition, one front wheel (one moat) is provided at the front of the lower surface of the traveling body (5) in the center part in the left-right direction, and this is the chassis O of the traveling body (5).
Inclined support arm I so that it can freely move in the direction of movement relative to I.
It is mounted so as to be rotatable about the axis αQ. (16) is the rotation axis of the front wheel Ql. Therefore, the direction of the front wheel 03 is automatically determined according to the traveling direction of the traveling body (5), for example, as shown by the dashed line. This device is well known.

The lower surface of the main chassis Ql has a mounting frame (
17), the rotary solenoid α barrel is installed, and the axis Q is
A scene member (rod) (2I) that rotates like a seesaw around L is provided, and rods (21a) and (21b) extending in the front-rear direction of the traveling body (5) are further attached to both ends of the rod (2I). (see Fig. 4), and shafts (22a
) through (22d) -CO-la (23a) ~(2
3d) is attached so as to be rotatable. In this case, as is clear from FIG. 5, the seesaw rod Qα is bent in the shape of a . It is made to be driven by. Since the mechanical connection means for this purpose between the Renoid QS and the seesaw rod (A) is not directly related to the gist of the present invention, its explanation will be omitted. However, at the 10-turn position at the end of the seesaw rod, the branching rollers (23a) and (23C) are located outside either the branching guide (8a) or (8b), as shown in FIG. 5, for example. ), the branching rollers (23b) and (23d) are selected to be located on the other outer side of the branching guide in the other rotational positions.

On the lower surface of the running body (5), there is a chic (
C) is attached to the support frame (B) by U-shaped supports (26a) and (26b) so that it can be shifted (slided) in the left-right direction (see FIG. 6).

The attachment position of this chic (2) is selected to be at the center of the traveling body (5) in the longitudinal direction. The left and right ends of this shifter (At) have shafts (28a) and (28), respectively.
b) so as to rotate around the respective rollers (29a).
and (29b) are attached to h0.For convenience, these are referred to as sub-rollers. In addition, these sub rollers (29a) and (2
9b) is not guided by the branching guides (8a) and (8b) and is not guided by the main guides (7a) and (8b), as shown in FIG.
The inner surface of 7b) is selected at the guided height position.

The same applies to the main rollers (lla) to (lid) described above.

Furthermore, on the lower surface of the chassis (1111) of the traveling body (5), a sub-chassis (to) is attached to the chassis 00) so as to be able to rotate around the axis I1) at almost the rear half thereof, and this has a motor. A drive device 1a (not shown in the dotted line block in Figure 14) including a drive mechanism and a differential gear device, etc., and a pair of left and right rear wheels (33a) and (33b) rotated by this drive device 1a ) is installed. (
34 and (34b) are these rear wheels (33a) and (34b).
3b).

The above-mentioned sub-chassis (21) is provided with a long hole (C) that extends in the front and back direction, while a pin (21) is installed in the shifter (21), which is inserted into the long hole (C). ), so that by shifting the chic (2) to the left or right, the sub-chassis (to) rotates clockwise or counterclockwise around the shaft assembly. Note that this axis Oυ is used for rear wheels (33a) and (33
b) is selected in between.

Next, the drive device 02 will be described. It is configured as shown in the 71st diagram expanded in a plane. (to) is a rotational drive source such as a motor that can rotate in reverse, and a small gear C31 is attached to the rotating shaft thereof. Furthermore, first and second rotation shafts (40a) and (40b) are provided, to which the first and second rotational axes are connected via first and second one-way clutches (41a) and (41b), respectively. gears (42a) and (42b) are attached, and these are always in mesh with the small wheel (31).The diameters of these gears (42a) and (42b) are approximately equal. The rotating shafts (40a) and (40b) are further equipped with 8g3 and fourth gears (42C) and (4
, 2d) are attached, and a fifth small gear (42e) is further attached to the second rotating shaft (40b). The gearbox (44) is a well-known differential gear device, and its gear (44) meshes with the fifth gear (42e) mentioned above.

1-way clutches (41a) and (41) for the 1st and audience 2
Regarding the connection and release of b), as shown in Fig. 8, when the pinion is 0 kn, the pinion C51 rotates in the H1 direction.
- m1 gear (42a) - first one-way clutch (41
a), the first rotating shaft (40a) rotates counterclockwise, and at this time the second gear (42b) rotates through the pinion OI
However, this gear is selected so as not to drive the second rotating shaft (40b) through the second one-way clutch (41b), and the pinion cl. ! When the lG rotates counterclockwise, its second rotating shaft (40b) is rotationally driven clockwise via the second wheel (42b) and the second one-way clutch (41b). There is. Therefore, when the motor (2) rotates clockwise, the third gear (
42C) The differential gear device (As is rotated and transmitted to the rear wheels via the (small gear) - the fourth gear (42d) - the fifth gear (42e) (referred to as a first rotational drive transmission system). )
, when the motor (to) rotates in the counterclockwise direction, the second rotating shaft (40b) passes through the fifth gear (42e) to the rotated object, that is, the differential gear device (43 in this example), and rotates the rear wheel. In other words, in the first transmission system, the meshing system of the third gear (42C) and the fourth gear (42d) is involved, so that the motor (towards) Despite the same rotational speed in the forward and reverse directions, when the first power transmission system is in operation, the traveling speed of the traveling body (5) is slower than when the second power transmission system is in operation. is the first speed, and the operation of the second power transmission system is the second speed.As shown in FIG. In this case, a so-called dynamic brake is used. (4e is a rotational speed detection means, and when decelerating from 2nd gear to 1st gear, the speed is detected and the dynamic brake is used to smoothly decelerate. There is.

Furthermore, in the illustrated example, a second motor (47) is attached, and a third one-way clutch (40C) is similarly attached to its rotating shaft (40C).
This is the case when the sixth gear (42f) is attached via the clutch (41C), and by driving this gear clockwise, the gear (42f) is rotated via the one-way clutch (41C). By selecting the rotational speed, a third speed t- which is faster than the second speed described above (or even slower than the first speed described above) can be obtained.

Note that the means for obtaining the third speed may not be provided specifically for the rear wheels, but may be provided to drive the front wheels.

Next, the operation of the above-described configuration will be explained. The traveling body (5) in this example is assumed to be equipped with a battery, and the command signals manually inputted in advance are stored in the similarly mounted storage device, and the traveling body (5) receives this other signal. It is assumed that the vehicle travels according to pre-stored commands by means of a position signal generating means provided on the rail and a position signal generating means provided on the rail. The traveling speed is reduced when the vehicle is not traveling straight, including when turning at a fork.

If this running state is shown in terms of the route using FIGS. 9 and 10, there are four main wheels installed on the front, rear, left, and right sides of the running body (5). is v −
Since the traveling body (5) is guided by the inner surfaces of the pair of main guides (7a) and (7b) of the rail (4), the traveling body (5) runs on the rail (4) without meandering. Figure 9 shows running on a straight rail (4). In this case, the sickle (C) is located at approximately the center position in the left-right direction (width direction) of the running body (5). Since there is a pair of rear wheels (33
The extension directions of the axes of a) and (33b) are orthogonal to the pair of main guides (7a) and (7b) of the rail (4), so the rear wheels (33a) and (33b) are Since you will be facing the exact direction in which the 1/C rail (4) extends, you can expect smooth running.

Next, when the traveling body (5) enters a curve, as shown in FIG.
) or (29b) is shifted leftward (or rightward) by the curvature of either the main guide (7a) or (7b) constituting the rail (4), and along with this, the sub-chassis (towards ) rotates clockwise or counterclockwise around the shaft (3υ).This is clear from FIG. (34b) (7) The extension direction is
It will pass over the center point P of the curve of rail (4),
That is, the rear wheels (33a) and (33b) are always aligned with the tangential direction of the guides (7a) and (7b) of the rail (4), and considering that the front wheel (1 east) is in a free state, The extension direction of the shirt) H is the same as that of the pair of main guides (7a
) and (7b), and therefore, even if the traveling body (5) is on a curved rail, it can run smoothly on it.

Of course, this also applies to the case where the traveling body (5) moves in the direction of turning at a branch point. Furthermore, the rear wheel (3
3a) and (33b) f) C'f' 7) (3
The center point of the curve of the rail (4) can be always located on the extension of 4a) and (34b) by selecting the distance from the axis Gυ to the pin c.

Furthermore, on the upper side, the front wheel (13>) is the case where one wheel is used, as shown in the 11th country.

Two front wheels (13a) and (13b) can also be used, in which case two front wheels (13a) and (13b) can also be used.
3b) a little forward of the center part by 1lill (1
A similar operation can be expected by rotatably bearing at 51.

As explained above, according to the present invention, the rotational speed of the rotated object, that is, the differential gear device (43 in this example) can be changed only by changing the rotational direction of the rotational drive source, ie, the motor (2) in this example. There is no need to use a complicated mechanism such as a transmission that is conventionally used, and the shifting operation for shifting can be done by simply switching the motor C (S). It has the characteristics of being extremely easy to use.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing how a traveling body is used using the transmission device for changing the rotational speed of a rotary drive shaft according to the present invention, FIG. 2 is a plan view showing a portion of an example of a rail on which the traveling body runs, and FIG. The figure is a cross-sectional view taken along line A-A, figure W4 is a bottom view of the orthogonal body, figure 5 is a cross-sectional view taken along line BB of figure 4, and figure 6 is a cross-sectional view taken along line C-C of figure 4. 7 is a developed plan view of the driving device for the traveling body; FIG. 8 is a front view of a portion of FIG. 7; FIG. 9 is a route plan view showing the positional relationship of the traveling body on the rail; FIG. 10 is a plan view similar to that shown in FIG. 9 showing another state, and FIG. 11 is a route plan view showing an example of the relationship between traveling bodies. (4) is the rail, (7) is the guide r, (5) is the running body, (to) Figure 1 1 Figure 3

Claims (1)

[Claims] The rotational drive source whose rotational direction can be switched is configured to transmit power to a common rotated body via a first rotational drive transmission system and a second rotational drive transmission system, and A transmission device for changing the rotational speed of a rotary drive shaft, wherein a one-way latch is provided in the first and second rotation transmission systems, respectively, and the one-way latch is connected only in mutually different directions of rotation of the rotary drive source.