JP4464040B2 - Drive mechanism in reversing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a rotary table having a circular outer peripheral portion serving as a rotating surface and having an article placement portion inside the outer peripheral portion, and a support roll that rotatably supports the rotating table in contact with the rotating surface. And a drive mechanism in a reversing device provided with a rotation drive unit having a chain stretched along a circular outer peripheral part and a chain wheel around the chain.
[0002]
[Prior art]
This kind of reversing device is disclosed in Japanese Utility Model Publication No. 4-47136. In this device, as shown in FIG. 8 (a), a chain V stretched along the outer periphery of the turntable is connected to an idle shaft. A method of hanging around the drive shaft Y using X and X has been taken. However, in this method, there is a problem in space in connecting a motor shaft with a high reduction ratio to the drive shaft Y, and if it is arranged laterally as in the above device, the number of motor shafts is increased by one.
[0003]
On the other hand, as shown in FIG. 8B, when the drive shaft Z is hung around the place where the chain V is pulled out to the side using the idle shaft X, as shown in FIG. It can be seen that the problem is solved, but the drive portion (motor or the like) protrudes outward by arranging the drive shaft Z to the side in order to avoid the occurrence of the location W of the chain V or to avoid it. This causes the problem.
[0004]
[Problems to be solved by the invention]
The present invention has been made paying attention to the above points, and the problem is to be able to reliably transmit the driving force without enlarging the outer dimensions such as the height and width of the chain driving mechanism. It is.
[0005]
In order to solve the above-mentioned problems, the present invention has a rotating table having a circular outer peripheral part serving as a rotating surface and having an article placement part inside the outer peripheral part, and a rotating table in contact with the rotating surface. In a reversing device comprising a rotation roll having a support roll that rotatably supports the chain, a chain stretched around a circular outer periphery, and a chain wheel around the chain, one of the chain wheels is rotated directly below the turntable. It is placed close to the surface, and the other chain wheel fits in the lower part of the turntable without coming out sideways, and is placed at a higher position than one chain wheel.
The chain stretched along the outer circumference of the circle passes from one side of the rotating surface, passes through one chain wheel, hangs on the other chain wheel, then hangs on one chain wheel, and further on the other side of the rotating surface. By being guided, the chain is provided with a cross loop part that crosses the middle to form a loop,
The chain drive chain wheel and the driven chain wheel that hang around one chain wheel and the other chain wheel are arranged so as to be axially displaced so that the chain does not contact at the crossover loop , so that the chain The chain wheel and the other chain wheel are inclined with respect to the axial direction, and
As a chain that allows the above-mentioned slanting to be stretched, a link chain in which vertical and horizontal chain links are alternately connected is used, and as a chain wheel, a deep recess and a horizontal chain link that store the vertical chain links constituting the link chain are used. In this case, a means using a chain wheel in which shallow recesses for accommodating the ridges are alternately formed is taken.
[0006]
The reversing device includes a turntable having a cylindrical outer peripheral portion serving as a rotation surface, and having an article placement portion on the inner side of the outer periphery, and the turntable is supported in contact with the rotation surface. It is rotatably supported by a roll. The chain shall be stretched along the circumferential outer periphery of such a turntable. In this case, as shown in FIG. 7 (a), it is ideal to perform the reciprocating rotation with one drive shaft, but it is impossible to avoid the cross contact at the point P, and this method is difficult. .
[0007]
Therefore, in the present invention, as shown in FIG. 7 (b), by combining one drive shaft D and one idle shaft F, a technique for avoiding cross-contact of the chain has been developed and the object has been achieved. In the present invention, one condition is that a roller chain that has been conventionally used is discarded and a link chain is applied. This is because the link chain is flexible with respect to the tilting direction of the chain, and there is no problem in power transmission even if it is tilted. Yes, the price is cheaper.
[0008]
In order to prevent the link chain from coming into contact at the crossing point, the driving chain wheel and the driven chain wheel are axially arranged in such a way that a loop is formed by crossing the middle of the link chain. The drive mechanism is configured by shifting them. In this case, one chain wheel is disposed as close as possible to the rotating surface directly below the turntable, and the other chain wheel is disposed at a position that does not protrude sideways at the lower part of the turntable. Therefore, the other chain wheel can be arranged higher than the one chain wheel, so that it can be configured very compactly.
[0009]
As the link chain that can be used in the present invention, for example, a link chain used for chain blocks is suitable, and a chain sling chain defined in JIS B8816 is most suitable. This link chain is used together with a chain wheel for a link chain, a so-called chain wheel.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the drive mechanism in the reversing device of the present invention will be described with reference to the illustrated example. FIG. 1 is a front view of a reversing device 10 that handles heavy objects. A rotating table 13 having a circular outer peripheral portion as a rotating surface 11 and article placement portions 12a and 12b inside the outer peripheral portion, and a rotating surface 11 It has the base 15 which supports the turntable 13 rotatably by the support rolls 14 and 14 which contact | connect. Stopping portions 16a and 16b are provided at both ends of the rotating surface where the rotating surface 11 and the article placement portions 12a and 12b intersect, and the ranges where the receiving portions 17a and 17b provided on the base 15 respectively hit each other, in the illustrated example. For example, an article placed on one placement portion 12a can be moved to the other placement portion 12b by the rotation of the turntable 13, and the orientation can be changed.
[0011]
The rotation drive unit 20 includes a single link chain 21 stretched along a circular outer peripheral portion, and two chain wheels 23 and 24 that hang around the link chain 21. The crossing loop part 22 which made the shape of a loop cross | intersect the lower part of this, and has the structure which arrange | positions the two chain wheels 23 and 24 in this loop part. One driven chain wheel 23 is arranged at the center of the turntable 13, and the other drive chain wheel 24 is at the lower part of the turntable 13, on the side upper part of the follower chain wheel 23, and with the follower chain wheel 23. It is arranged at a position shifted in the axial direction, and is configured so that the link chain 21 does not contact at the crossover portion 25. See FIG. 2, FIG. 3 and FIG.
[0012]
FIG. 5 shows chain wheels 23 and 24 and a link chain 21. The link chain 21 is defined in JISB8816. The chain wheel has the same shape and structure with respect to the tooth portion engaged with the link chain 21 for both the follower and the drive. The configuration is shown in FIGS. 5 and 6. FIG. 6 (a) is a driving chain wheel and FIG. 6 (b) is a driven chain wheel, each of which has a shallow recess 26 for storing a horizontal chain link 21H and a vertical chain wheel. A deep recess 27 for receiving the chain link 21V is provided. Reference numeral 28 denotes a flange, and 29 denotes a keyway. The drive chain wheel 24 is coupled to the output shaft of the speed reducer 30 that is a power unit.
[0013]
As described above, the drive mechanism 20 applied to the reversing device 10 of the present invention has only the driven chain wheel 23 arranged at the lower center of the turntable 13, and the drive chain wheel 24 is shifted in the axial direction so that the link chain 21 is inclined. It is possible to take a configuration in which the crossing loop portion 22 is formed and the crossing portion 25 does not contact. Unlike the conventional roller chain, the link chain 21 has a welded structure and can be inclined and stretched, so that the number of parts is small and the structure is simplified.
[0014]
【The invention's effect】
Since the present invention is configured and operates as described above, the chain drive mechanism can be reliably transmitted without increasing the height and width of the width support, and in particular, one link chain. The cross loop part is made by using a drive chain wheel and a follower chain wheel, so that it is simple and can embody a structure that could not be realized with a conventional roller chain. There is an effect that can be done.
[Brief description of the drawings]
FIG. 1 is a front view of a reversing device to which a drive mechanism according to the present invention is applied.
FIG. 2 is a plan view of the base portion of the above.
FIG. 3 is a side view of the same.
FIG. 4A is an explanatory diagram of a link chain.
(B) Explanatory drawing which shows the crossing loop part of the thing of FIG.
FIG. 5 is a cross-sectional view of a chain wheel in the present invention.
FIG. 6A is a cross-sectional view taken along the line AA in the driving chain wheel.
(B) BB sectional drawing in the drive chain wheel.
(C) CC sectional drawing in a driven side chain wheel.
(D) DD sectional drawing in a driven side chain wheel.
7A is an explanatory view showing Example 1 for explaining the drive mechanism of the present invention. FIG.
(B) Explanatory drawing which shows Example 2 for description of the drive mechanism of this invention.
FIG. 8A is an explanatory view showing Example 1 of a conventional drive mechanism.
(B) Explanatory drawing which shows the example 2 of the conventional drive mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Inversion apparatus 11 Rotating surface 13 Turntable 14 Support roll 20 Drive mechanism 21 Link chain 22 Crossing loop part 23 Drive chain wheel 24 Drive chain wheel 25 Crossing part

Claims (1)

A rotating table having a circular outer peripheral portion serving as a rotating surface, and having an article placement portion on the inner side of the outer peripheral portion; a support roll that rotatably supports the rotating table in contact with the rotating surface; In the reversing device provided with a rotation drive unit having a chain stretched along the outer periphery and a chain wheel for hanging the chain,
Place one chain wheel directly under the turntable and close to the rotation surface, and place the other chain wheel in the lower part of the turntable without coming out sideways and at a higher position than one chainwheel And
The chain stretched along the outer circumference of the circle passes from one side of the rotating surface, passes through one chain wheel, hangs on the other chain wheel, then hangs on one chain wheel, and further on the other side of the rotating surface. By being guided, the chain is provided with a cross loop part that crosses the middle to make a loop,
The chain drive chain wheel and the driven chain wheel that hang around one chain wheel and the other chain wheel are arranged so as to be axially displaced so that the chain does not contact at the crossover loop , so that the chain The chain wheel and the other chain wheel are inclined with respect to the axial direction, and
As a chain that allows the above-mentioned slanting to be stretched, a link chain in which vertical and horizontal chain links are alternately connected is used, and as a chain wheel, a deep recess and a horizontal chain link that store the vertical chain links constituting the link chain. A drive mechanism in a reversing device, characterized in that it is configured using a chain wheel in which shallow recesses for accommodating the stub are formed alternately .

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