JPH09278131A - Turntable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a turntable to generate a smooth rotation by engaging smoothly the pin gear of a table main body and a pinion engaged to the pin gear, even though the diameter of the table main body is changed somewhat. SOLUTION: In a turntable 10a having a table main body 12 furnishing a pin gear 21 on the periphery; and a pinion 19 engaged to the pin gear 21, and driven to rotate by a rotary driving source 18; a guide ring 23a is arranged concentrically to the pin gear 21, while a guide member 23b driven and movable in the radial direction along the expansion and contraction of the guide ring 23a is provided, and the pinion 19 is moved in the radial direction of the pin gear 21 following the movement of the guide member 23b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turntable used for shipment storage and intermediate storage in a factory for manufacturing electric wire cables, steel wire cables, water pipe hoses and the like.

[0002]

2. Description of the Related Art FIGS. 5 and 6 show a conventional turntable 10 on which a general electric cable or the like is placed and rotated.
Table body 12 supporting a load 11 such as an electric wire cable
Is a structure capable of rotating the load 11 while supporting the load 11 by a plurality of rollers 13 supporting a vertical load and a center support portion 14 supporting a horizontal load and holding the rotation center of the table body. Has become. Generally, the table body 12 is rotationally driven by providing a pin gear 15 on the outer periphery of the table body 12, a pinion 16 that meshes with the pin gear 15, and driving the pinion 16 by a rotational drive source 16a such as a motor. there were. 16b is a fixed base.

[0003]

However, in the case of a large turntable 10, there is a table body 12 having an outer diameter of 20 m. In recent years, there is a strong tendency to increase the size of the table body 12, and the outer diameter of the table body 12 is 30 m. Is also planned. As described above, as the size increases, the change in the outer diameter due to the thermal expansion and contraction of the table body 12 due to the change in the ambient temperature also increases, but the change in the pitch circle diameter of the pin gear 15 also increases (10 mm-in the trial calculation example). 15mm diameter change occurs),
A change in state of the meshing portion with the pinion 16 that transmits the rotational driving force, for example, a change in the distance A between the meshing centers, a change in the meshing backlash, etc., which is a phenomenon that is unfavorable to the turntable rotation, an abnormal noise, or a rotational hiccup phenomenon. Was a factor that causes. Further, it is expected that this tendency will become an increasing concern as the size of the turntable further increases. The present invention has been made in view of such circumstances, and even if the diameter of the table body changes to some extent,
An object of the present invention is to provide a turntable in which a pin gear of a table main body and a pinion meshing with the pin gear smoothly mesh and rotate smoothly.

[0004]

According to the present invention, there is provided a semiconductor device comprising:
In the turntable described above, in a turntable having a table main body having a pin gear on its periphery and a pinion that meshes with the pin gear and is rotationally driven by a rotary drive source, a guide ring is arranged concentrically with the pin gear, and A guide member is provided which can be driven and moved in the radial direction along the expansion / contraction of the guide ring, and the pinion is moved in the radial direction of the pin gear in accordance with the movement of the guide member. A turntable according to a second aspect is the turntable according to the first aspect, wherein the guide ring is a horizontal guide plate arranged concentrically with the pin gear on the outer periphery of the table body, and the guide member is The guide roller, the pinion, and the rotation drive source thereof are mounted on a sliding bed and urged toward the center of the table body by a pressing means. Has been done. A turntable according to a third aspect is the turntable according to the first aspect, wherein the guide ring comprises a vertical guide plate arranged concentrically with the pin gear on the outer periphery of the table body, and the guide member is The guide roller pair sandwiches the vertical guide plate from inside and outside. The guide roller pair, the pinion, and a rotation drive source thereof are mounted on a sliding bed and are movable in the radial direction of the table body.

In the turntables according to claims 1 to 3, a guide ring is provided on the table body, the diameter of which changes by thermal expansion and contraction, and the guide member is brought into contact with the guide ring so that the radial direction of the table body is increased. Is detected, and the position of the pinion meshing with the pin gear is changed accordingly. Therefore, the pinion meshes with the pin gear regardless of changes in the ambient temperature, so that smooth power transmission can always be performed. Particularly, in the turntable according to claim 2, the guide ring is composed of a horizontal guide plate arranged concentrically with the pin gear on the outer periphery of the table main body, and the guide member is rotated by contacting the horizontal guide plate from the outside. Consisting of a guide roller,
Since the pinion and its rotary drive source are mounted on the sliding bed and are urged toward the center of the table body by the pressing means, the position of the pin gear and the pinion is always maintained regardless of the actual outer diameter of the table body. Can be kept at regular intervals. Further, in the turntable according to claim 3, the guide ring is composed of a vertical guide plate arranged concentrically with the pin gear on the outer periphery of the table body, and the guide member is composed of a pair of guide rollers sandwiching the vertical guide plate from inside and outside. Since the guide roller pair, the pinion, and the rotation drive source thereof are mounted on the sliding bed, if the diameter of the table body is expanded or contracted, the guide ring is also expanded or contracted. The distance from the pinion can be kept constant.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to the attached drawings, an embodiment in which the present invention is embodied will be described to provide an understanding of the present invention. 1 is a partial plan view of the turntable according to the first embodiment of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a portion of the turntable according to the second embodiment of the present invention. A plan view and FIG. 4 are side views of the same.
The same components as those of the turntable 10 according to the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 1 and 2, a turntable 10a according to the first embodiment of the present invention is an example of a rotary drive source mounted on a circular table body 12 and a sliding bed 17. And a pinion 19 attached to the output shaft of the reduction gear 18, and a pressing means 20 attached to one of the sliding beds 17. These will be described in detail below.

The circular table body 12 has a known structure as shown in FIGS. 5 and 6, and a pin gear 21 is provided around it. The pin gear 21 is a ring-shaped upper plate 2 attached to a side plate 22 of the table body 12.
3 and the lower plate 24, and a plurality of pins 25 connecting the upper plate 23 and the lower plate 24 and arranged at a predetermined pitch circle p1. The pins 25 are arranged at a predetermined interval so that the pinion 19 made of the sprocket meshes with them. The upper plate 23 has a diameter larger than that of the lower plate 24, and the enlarged diameter portion serves as a horizontal guide plate 23a. In this embodiment, the upper plate 23 is expanded in diameter to form a horizontal guide plate 23a which is an example of a guide ring. However, it is not always necessary to expand the diameter, and a horizontal guide separate from the upper plate 23 is used. The plate 23a may be attached.

The sliding bed 17 has a lower base plate 2
6 is provided so as to be laterally movable, is attached to a fixed object (not shown) so as to be swingable via a shaft 27 at one end, and is provided with a pressing means 20 having a compression spring 28 at the other end. Further, the sliding bed 17 has a speed reducer 18 and a motor 30 connected to the speed reducer 18, and a pinion 19 is attached to an output shaft of the speed reducer 18. A guide roller 23b, which is an example of a guide member that comes into contact with the end surface of the horizontal guide plate 23a, is provided at the upper position of the pinion 19 on the output shaft. This guide roller 23
The sum of the diameter d1 of b and the diameter d2 of the horizontal guide plate 23a is the same as the sum of the pitch circle diameter p1 of the pin gear 21 and the pitch circle diameter p2 of the pinion 19. The pressing means 20 has spring receiving seats 31 and 32 respectively attached to the other end of the sliding bed 17 and a fixed supporting member (not shown), and a compression spring 28 mounted between them.

Therefore, in the turntable 10a, the sliding bed 17 is pressed by the pressing means 20 to form the shaft 2
The table 7 is urged toward the center of the table body 12 with the center of the table 7. As a result, the guide roller 23
Since b contacts the end surface of the horizontal guide plate 23a, even if the diameter of the pin gear 21 is slightly expanded or reduced due to temperature change or the like, the pin gear 21 and the pinion 19 are properly meshed, and the table body 12 rotates smoothly. To drive.

Next, a turntable 35 according to a second embodiment of the present invention shown in FIGS. 3 and 4 will be described. A vertical guide which is another example of a guide ring is provided on the lower outer periphery of the table body 12. A plate 36 is provided, and a guide roller pair 39 including rollers 37 and 38 sandwiching the vertical guide plate 36 is mounted on a sliding bed 40. One end of the sliding bed 40 is swingably mounted on the shaft 27, and is mounted laterally movable on the lower base plate 26. The sliding bed 40 has the speed reducer 18 and the motor 30 connected thereto, and the output shaft of the speed reducer 18 is provided with the pinion 19 made of a sprocket. The entire mounting is performed so that the pinion 19 appropriately meshes with the pin gear 21 at a position where the guide roller pair 39 rotates while contacting the vertical guide plate 36.

Therefore, since the guide roller pair 39 rotates while sandwiching the vertical guide plate 36, even if the diameter of the table main body 12 is expanded or contracted, the sliding bed 40 moves in the radial direction of the table main body 12 and the pin gear. 21 and pinion 1
The table main body 12 is rotationally driven while the 9 smoothly meshes.

[0013]

As is apparent from the above description, the turntables according to the first to third aspects of the present invention have the guide ring arranged concentrically with the pin gear provided on the outer peripheral portion of the table body, and can be used for expanding and contracting the guide ring. Accordingly, a guide member movable in the radial direction is provided, and the pinion is moved along with the movement of the guide member, so that the pinion can be smoothly meshed with the pin gear regardless of the expansion and contraction of the table body due to heat. it can. Particularly, in the turntable according to the second aspect, since the guide roller is pressed against the horizontal guide plate by the pressing means, the pin gear and the pinion can be smoothly meshed with a simple structure. In the turntable according to claim 3,
Since the vertical guide plate is moved while being sandwiched by the pair of guide rollers, the pinion moves exactly in accordance with the expansion and contraction of the table body, so that a smoother meshing relationship between the pin gear and the pinion can be maintained.

[Brief description of drawings]

FIG. 1 is a partial plan view of a turntable according to a first embodiment of the present invention.

FIG. 2 is a partial side view of the same.

FIG. 3 is a partial plan view of a turntable according to a second embodiment of the present invention.

FIG. 4 is a partial side view of the same.

FIG. 5 is a plan view of a turntable according to a conventional example.

FIG. 6 is a sectional side view of the same.

[Explanation of symbols]

10a Turntable 11 Load 12 Table body 17 Sliding bed 18 Speed reducer 19 Pinion 20 Pressing means 21 Pin gear 22 Side plate 23 Upper plate 23a Horizontal guide plate (guide ring) 23b Guide roller (guide member) 24 Lower plate 25 pin 26 Base plate 27 shaft 28 compression spring 30 motor 31 spring receiving seat 32 spring receiving seat 35 turntable 36 vertical guide plate 37 roller 38 roller 39 guide roller pair 40 sliding bed

Claims (3)

[Claims] 1. A turntable having a table main body having a pin gear on its periphery, and a pinion that meshes with the pin gear and is driven to rotate by a rotary drive source, wherein a guide ring is arranged concentrically with the pin gear.
A turntable, wherein a guide member is provided which can be driven and moved in the radial direction along the expansion and contraction of the guide ring, and the pinion is moved in the radial direction of the pin gear in accordance with the movement of the guide member. 2. The guide ring comprises a horizontal guide plate arranged concentrically with the pin gear on the outer periphery of the table body, and the guide member comprises a guide roller rotating by contacting the horizontal guide plate from the outside. 2. The turntable according to claim 1, wherein the guide roller, the pinion and a rotational drive source thereof are mounted on a sliding bed and are urged toward the center of the table body by pressing means. 3. The guide ring comprises a vertical guide plate arranged concentrically with the pin gear on the outer periphery of the table body, and the guide member comprises a pair of guide rollers sandwiching the vertical guide plate from inside and outside, The turntable according to claim 1, wherein the pair of guide rollers, the pinion, and a rotation drive source thereof are mounted on a sliding bed and are movable in the radial direction of the table body.