JPH1111U - Heavy load rotating device - Google Patents

Abstract

(57) [Abstract] [Object] To provide a novel heavy-duty rotating device capable of making the device thinner. Another object is to provide a device that is easy to assemble. [Structure] Two undulations rotatable about a horizontal axis are installed on both sides of the horizontal axis, and a cam plate having a lower edge as a cam edge on the lower surface of each undulation. Are mounted in a direction perpendicular to the horizontal axis, and a cam follower provided to be able to run on a slide table installed in a direction perpendicular to the horizontal axis is pressed against the cam edge, A heavy-weight rotating device comprising a cam follower and a linear drive mechanism connected thereto.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a heavy object rotating device intended to be used when rotating a mold, a workpiece, or other heavy objects (0 to 90 degrees).

[0002]

[Prior art]

 The applicant previously filed Japanese Patent Application No. 63-241388 (filed on Sep. 27, 1988, Japanese Unexamined Patent Application Publication No. 2-89709) in which an up-and-down plate rotatable around a horizontal shaft interposed the horizontal shaft. A cam plate having a cam groove for undulation is provided on the lower surface of each undulating plate in a direction orthogonal to the horizontal axis, and a cam follower is provided in the cam groove of the cam plate. And a heavy-duty rotating device having a structure in which a linear drive mechanism is connected to the cam follower.

When the cam follower is moved via a linear drive mechanism, the cam follower and the cam plate generate a rotating force on the up-and-down plate to rotate around the horizontal shaft, so that a heavy object mounted on the up-and-down plate can be moved to a desired position. (In the range of 0 to 90 degrees).

[0004]

[Problems to be solved by the invention]

 In this heavy-weight rotating device, the entire device is installed below the floor so that the hoisting surface is flush with the floor when the device is in a prone state, so that the entire device is made as thin as possible. Is required.

[0005] The above-mentioned device has also made it possible to significantly reduce the thickness as compared with other devices proposed so far, but it has been desired that the device can be further reduced in thickness.

[0006]

[Means for solving the problem]

 The purpose of this invention is to provide a novel heavy-duty rotating device capable of thinning the device.

Generally speaking, as the device becomes thinner or smaller, assembly tends to be difficult. Accordingly, the present invention also aims to provide a heavy-weight rotating device that is easy to assemble.

[0008] In the heavy-duty rotating device of the present invention that achieves the above object, two undulations rotatable around a horizontal shaft are installed on both sides of the horizontal shaft. A cam plate having a lower edge as a cam edge is mounted on a lower surface of the undulating machine in a direction orthogonal to the horizontal axis, and can run on a slide table installed in a direction orthogonal to the horizontal axis. The present invention is characterized in that the provided cam follower is pressed against the cam edge and a linear drive mechanism is connected to the cam follower.

[0009] The shape of the cam edge may be various cycloid curves, and one or a plurality of types of cycloids may be provided so that the undulating surface rotates at a desired rotational speed for a constant speed running of the cam follower. Curves are combined.

In the case where the shape of the cam edge is formed by combining a plurality of types of cycloid curves and the rotational speed of the undulating surface in a range of 0 to 90 degrees is changed, the rotational speeds of both undulating surfaces are synchronized. In order to achieve this, it is desirable that both sides of the portion having a rotation angle of 45 degrees be formed of a curve having the same rotation speed when the cam follower runs at a constant speed. However, when controlling the rotation speed of the undulating surface by controlling the moving speed of the cam follower, the shape of the cam edge can be freely determined.

[0011] The linear drive mechanism for the cam follower can be constituted by a hydraulic cylinder or a screw rod directly connected to the electric motor.

[0012]

[Embodiment of the invention]

 According to the heavy-duty rotating device of the present invention, the lower edge of the cam plate is used as the cam edge, so that the width of the cam plate is made smaller than that of a conventional device using a cam plate having a cam groove. In addition, the device can be reduced in thickness. Also, the cam plate becomes lighter, which contributes to the weight reduction of the whole device.

[0013] Furthermore, the assembling work of the cam plate and the cam follower may be an assembling work in which the cam follower and the cam edge are brought into contact with each other. can do.

[0014]

【Example】

 As shown in FIGS. 1 and 2, a horizontal shaft 3 is supported by stands 2 installed on both sides of a central portion of a base 1, and rectangular undulations 4 a, 4 b are provided on both left and right sides of the horizontal shaft 3. However, it is installed so that it can rotate around the horizontal shaft 3. Cam plates 5a and 5b are attached to the lower surfaces of the undulations 4a and 4b in a direction orthogonal to the horizontal shaft 3. The figure shows a case where two pairs of cam plates 5a and 5b are provided for each hoist, but the number of cam plates to be installed is determined according to the size of the hoist and the load. Therefore, the number of pairs may be one or three or more.

The cam plates 5a and 5b are offset in the direction of the horizontal shaft 3 by a distance substantially corresponding to the thickness of the cam plate on the left and right undulations 4a and 4b. On one side, a slide table 6 is provided so as to face between the cam plates 5a and 5b.

As shown in FIG. 3, the cam plates 5 a and 5 b have a lower edge as a cam edge 7, and a cylindrical cam follower 8 in contact with the cam edge 7 can run on the slide table 6. It is rotatably installed on the installed traveling block 9. In the embodiment, the cam follower 8 is a cylindrical body rotatably mounted on the traveling block 9, but a bearing is installed at an end of a cylindrical shaft fixed to the traveling block 9 to constitute a cam follower. Is also good. The traveling block 9 is connected to a piston rod 11 of a hydraulic cylinder 10 installed on the base 1, and travels on the slide table 6 via the hydraulic cylinder 10. In FIG. 3, reference numeral 12 denotes a spring, whose base end is connected to the base 1, while its front end is connected to a wire 13 connected to the undulating plate 4b. A spring 12 and a wire 13 are similarly provided on the undulating plate 4a side.

In FIG. 1, reference numeral 14 denotes an oil tank, 15 denotes a pump motor, 16 denotes a solenoid valve, and 17 denotes a control panel. A control device for the hydraulic cylinder 10 is housed on one side of the base 1.

In the above embodiment, when the traveling block 9 installed below the hoist 4b is moved via the hydraulic cylinder 10 in the direction of arrow 18 in FIG. 3, the cam follower 8 moves in the direction of arrow 19 Since it moves while rotating and applies the force of arrow 20 to the cam edge 7 of the cam plates 5a and 5b, the undulation plate 4b can be rotated in the direction of arrow 21. That is, by controlling the amount of linear movement of the cam follower 8, the undulating plate 4b can be rotated by a desired angle and raised. In the traveling range of the traveling block 9, the undulation plate 4b undulates at an angle of 0 to 90 degrees. When the hoisting plate 4b approaches the angle of 90 degrees, the lengths of the spring 12 and the wire 13 are set so that a tensile force in the direction of arrow 22 (see FIG. 3) acts on the hoisting plate 4b from the spring 12. The contact pressure between the cam edge 7 and the cam follower 8 is not weakened. Therefore, when the traveling block 9 is moved in the direction opposite to the arrow 18 from the state in which the up-and-down plate 4b is standing at an angle of 90 degrees, the travel distance of the traveling block 9 is maintained without the cam edge 7 and the cam follower 8 separating. The undulating surface 4b can be rotated in the direction of the arrow 22 in accordance with the above.

With a heavy object such as a mold and a workpiece (usually a rectangular parallelepiped) placed on the undulating plate 4a, the undulating plate 4b is turned at an angle of 90 degrees as described above. After raising and following the side wall of the heavy object, while raising the undulating surface 4a in the direction of arrow 23 (see FIG. 2), the undulating surface 4b is lowered at the same speed as the rotation speed of the undulating surface 4a. Thus, the heavy object can be rotated by a desired angle. A 90 degree rotation can be obtained where the undulations 4a stand upright at right angles and the undulations 4b lie down horizontally. When the undulations 4a, 4b rotate in the direction of laying down from a state of standing at a right angle, the spring 12 prevents the cam edge 7 from coming into contact with the cam follower 8, so that the undulations 4a, 4b are at right angles. The heavy object can be rotated while maintaining the relationship accurately, and no gap is formed between the heavy object and the hoist.

Next, when assembling the heavy-duty rotating apparatus of the above embodiment, the cam plates 5 a and 5 b are simply attached to the up-and-down plates 4 a and 4 b installed via the horizontal shaft 3, so that Can be incorporated into On the other hand, the cam follower 8 can be incorporated into the apparatus simply by attaching it to the traveling block 9 installed on the slide table 6. The cam plates 5a, 5b and the cam follower 8 need only contact the lower cam edge 7 of the cam plates 5a, 5b with the upper side of the cam follower 8, and there is no need to engage with the cam groove. Therefore, assembly can be performed extremely easily.

FIG. 4 shows an embodiment in which the traveling block 9 is driven by an electric motor 24 instead of the hydraulic cylinder 10.

A screw 25 is connected to the output shaft of the electric motor 24, and the running block 9 is screwed to the screw 25. By controlling the rotation direction of the electric motor 24, the traveling block 9 can travel as indicated by the arrow 26, and the undulations 4a and 4b can be raised and lowered by the action of the cam plate and the cam follower.

FIG. 5 shows a curve of the cam edge 7 formed at the lower edge of the cam plates 5a and 5b. Each is a cycloid curve, and when the traveling speed of the traveling block 9 and the cam follower 8 is a constant speed, if the curve a is used, the hoists 4a and 4b can be constantly rotated at a constant speed. Curve b is a curve that allows the initial speed (speed near 0 °) and final speed (speed near 90 °) to be half of the intermediate rotation speed, and curve c is a curve that can be reduced to 1/4. It is.

As described above, the cam edge 7 is constituted by a curved line combining one or a plurality of types of cycloid curves, and the rotation speed of the undulations 4a and 4b is set to a desired mode to protect and operate heavy objects. Safety can be achieved. Incidentally, the cam edge 7 is formed in a constant speed mode along the curve a, and by controlling the moving speed of the cam follower 8, it is also possible to change the rotation speed mode of the undulations 4a, 4b.

When the two undulations are rotated at the same time while maintaining a predetermined angle, it is necessary to synchronize the respective rotation speeds. Therefore, when the rotation speed is changed by the shape of the cam edge 7, the cam edges 7 of the respective cam plates 5a and 5b have the same rotation speed in both directions with a rotation angle of 45 degrees therebetween. You need to do that.

[0026]

[Effect of the invention]

 According to this invention, since the lower edge of the cam plate provided on the lower surface of the undulation plate is used as the cam edge and pressed against the cam follower running in the horizontal direction, compared with the case where the cam groove is provided on the cam plate. As a result, the height of the cam plate is reduced, so that the device can be made thinner and the weight can be reduced.

Further, since the cam mechanism can be constituted only by the pressure contact between the cam edge and the cam follower, there is an effect that the device can be easily assembled.

Further, when the up-and-down plate is upright, the spring makes use of its own weight if the up-down plate is inclined, so that the press-contact state between the lower edge of the cam edge and the cam follower can be always maintained. This has the effect of accurately controlling the rotation angle of the hoisting plate so that no gap is formed between the hoist and the heavy object.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of an embodiment of the present invention.

FIG. 2 is a front view of the embodiment.

FIGS. 3A and 3B are partial views of the embodiment, in which FIG. 3A is a partially enlarged front sectional view and FIG. 3B is a partially enlarged sectional side view.

FIG. 4 is a front view showing another embodiment of the linear drive mechanism of the cam follower.

FIG. 5 is a diagram of a cycloid curve adopted for a cam edge of a cam plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 Horizontal shaft 4a, 4b Undulation surface 5a, 5b Cam plate 6 Slide table 7 Cam edge 8 Cam follower 9 Travel block 10 Hydraulic cylinder 11 Piston rod 12 Spring 13 Wire 24 Electric motor 25 Screw rod

Claims (1)

[Utility model registration claims] 1. Two undulations rotatable about a horizontal axis are installed on both sides of the horizontal axis, and the lower edge of each of the undulations is a cam edge. A cam plate is mounted in a direction orthogonal to the horizontal axis, and a cam follower provided to be able to run on a slide table installed in a direction orthogonal to the horizontal axis is pressed against the cam edge. A heavy-weight rotating device, wherein a linear drive mechanism is connected to the cam follower.