JP3643207B2 - Turntable - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a turntable, and more particularly, to a novel improvement for simplifying and downsizing a structure in which a rotating member and a fixing member have a uniaxial configuration in a concentric arrangement.
[0002]
[Prior art]
Conventionally, as this type of turntable, a configuration shown in FIG. 3 has been generally adopted. That is, a first gear 4 and a rotating body 5 are provided on a main shaft 3 that is rotatably provided on a base 1 via a bearing 2, and a drive gear 7 of a motor 6 provided on the base 1 is the first gear 4. The main shaft 3 is rotated by meshing with one gear 4. The base 1 is provided side by side with the main shaft 3 and a sub shaft 8 is rotatably provided. The sub shaft 8 is provided with a second gear 9 that meshes with the first gear 4. The two gears 9 are provided with dogs 10. On the base 1, first and second stoppers 11 and 12 and first and second detection switches 13 and 14 that are in contact with the dog 10 are provided.
[0003]
Next, the operation will be described. First, when the main shaft 3 is rotated in one of the left and right directions by 1 to 2 rotations, the dog 10 contacts either of the stoppers 11 and 12 after turning on one of the detection switches 13 and 14. Therefore, the rotation of the main shaft 3 is configured to be 1 rotation or more and 2 rotations or less.
[0004]
[Problems to be solved by the invention]
Since the conventional turntable is configured as described above, the following problems exist. That is, since the auxiliary shaft must be used for the main shaft, it is difficult to reduce the plane area and to meet the demand for downsizing.
[0005]
The present invention has been made to solve the above-described problems. In particular, the present invention provides a turntable in which the rotating member and the fixing member have a uniaxial configuration in which the rotating member and the fixing member are arranged concentrically, thereby simplifying the structure and reducing the size. The purpose is to do.
[0006]
[Means for Solving the Problems]
A turntable according to the present invention includes a first member and a second member that are concentrically arranged so as to be relatively rotatable with each other, a stopper provided on the first member, a motor provided on the second member, A transmission means provided on the rotating shaft for interlocking the members, and a slider which is movably provided in the long hole of the second member and is urged to a central position by a spring and capable of contacting the stopper And a dog provided on the slider, and first and second limit sensors provided on the first member and provided so as to be in contact with the dog and spaced apart from each other, the first member or the second member When the slider rotates more than once, the slider contacts the stopper and moves in the elongated hole, and the dog is detected by one of the limit sensors. Anyway A configuration in which the rotation of the to be stopped.
[0007]
More specifically, the first member is fixed and the second member rotates.
[0008]
More specifically, the first member is rotated and the second member is fixed.
[0009]
More specifically, the transmission means includes a first gear provided on the first member and a second gear provided on the rotating shaft and meshing with the first gear.
[0010]
More specifically, the transmission means includes a first pulley provided on the first member and a second pulley provided on the rotating shaft and coupled to the first pulley via a belt.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a turntable according to the present invention will be described with reference to the drawings.
Note that the same reference numerals are used for the same or equivalent parts as in the conventional example.
1 and 2, reference numeral 20 denotes a first member as a fixed side. The first member 20 has a substantially cylindrical shape as a whole, and a first gear fixed to the first member 20. 4 is provided with a stopper 12. The first member 20 is rotatably provided with a second member 3 as a rotating body, and the first and second members 20 and 3 are arranged concentrically so as to be rotatable relative to each other.
[0012]
The second member 3 is provided with a motor 6 having a rotating shaft 6 a, and a second gear 7 provided on the rotating shaft 6 a meshes with the first gear 4, and the second member 3 is driven by the motor 6. Can rotate. In addition, each member 3 and 20 can also make the 1st member 20 into a rotation side, and let the 2nd member 3 be a fixed side.
Further, the transmission means 30 for transmitting the rotational force between the members 20 and 3 is constituted by the gears 4 and 7, but the transmission means 30 is limited to the gears 4 and 7 described above. For example, the same action can be obtained by using a pulley (not shown) instead of the gears 4 and 7 and connecting the pulleys with a belt (not shown).
[0013]
The second member 3 is formed with a long hole 31 made of a punched hole, and a slider 32 having an L-shaped dog 10 is movably provided in the long hole 31 via a sliding member 32a. ing. In the slider 32, the ends of a pair of springs 33 and 34, which are well-known torsion springs provided on the second member 3, are in urging contact with each other. Normally, the slider 32 is positioned at the center of the long hole 31 and the slider 32 can come into contact with the stopper 12.
First and second limit sensors 40 and 41 spaced apart from each other are provided on the second member 3 and are configured to detect the movement of the dog 10.
[0014]
Next, the operation will be described. First, since the rotation angle α (not shown) that requires the second member 3 to make one or more rotations is set within the length of the long hole 31, the second member 3 is moved in the direction of arrow A by driving the motor 6. When the slider 32 comes into contact with the stopper 12 after one rotation, the slider 32 and the dog 10 move to one side in the long hole 31 and come into contact with the second limit sensor 41 to stop the rotation. Next, when the second member 3 is returned in the direction of the arrow B, the slider 32 returns to the center position of the long hole 31 by the action of the springs 33 and 34, and after further rotating and rotating once, the slider 32 is stopped by the stopper 12. The dog 10 rotates and stops until the dog 10 contacts the first limit sensor 40. Accordingly, in any rotation direction, an α rotation angle of one rotation or more corresponds to the amount of movement of the slider 32 in the long hole 31.
[0015]
【The invention's effect】
Since the turntable according to the present invention is configured as described above, the following effects can be obtained. That is, the first and second members used as the fixed side and the rotating side are arranged concentrically with each other and rotate and stop one or more times using a long hole and a slider, so the planar shape is significantly smaller than the conventional one. In addition, the configuration is changed from the conventional 2-axis to the 1-axis, and a significant cost reduction can be achieved.
[Brief description of the drawings]
FIG. 1 is a plan view showing a turntable according to the present invention.
FIG. 2 is a cross-sectional view of FIG.
FIG. 3 is a perspective view showing a conventional turntable.
[Explanation of symbols]
3 Second member 4 First gear 6 Motor 6a Rotating shaft 7 Second gear 10 Dog 12 Stopper 20 First member 30 Transmission means 31 Long hole 32 Slider 33, 34 Spring 40, 41 First, second limit sensor

Claims (5)

A first member (20) and a second member (3) arranged concentrically so as to be rotatable relative to each other, a stopper (12) provided on the first member (20), and provided on the second member (3) Motor (6), transmission means (30) provided on the rotating shaft (6a) of the motor (6) for interlocking the members (20, 3), and the second member (3) A slider (32) that is movably provided in the long hole (31) and is urged to its central position by a spring (33, 34) and can come into contact with the stopper (12), and the slider (32) A dog (10) provided; and first and second limit sensors (40, 41) provided on the first member (20) and provided so as to be in contact with the dog (10) and spaced apart from each other. When the first member (20) or the second member (3) is relatively rotated one or more times, the slider (32) contacts the stopper (12) and moves in the elongated hole (31), The dog (10) is one of the limit sensors (40, 41). A more detected, turntable the 2 rotates following more than one rotation or rotation of the members (20, 3) is characterized by being configured to be stopped. The turntable according to claim 1, characterized in that the first member (20) is fixed and the second member (3) rotates. The turntable according to claim 1, characterized in that the first member (20) is rotated and the second member (3) is fixed. The transmission means (30) includes a first gear (4) provided on the first member (20) and a second gear (m) engaged with the first gear (4) provided on the rotary shaft (6a). The turntable according to any one of claims 1 to 3, characterized by comprising 7). The transmission means (30) includes a first pulley provided on the first member (20) and a second pulley provided on the rotating shaft (6a) and coupled to the first pulley via a belt. The turntable according to any one of claims 1 to 3, wherein the turntable is provided.

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