JP2022138785A - Universal joint for film sheet rotary machine - Google Patents

Abstract

To provide a universal joint for a film sheet rotary machine which achieves smooth, centered rotary motion and smooth winding and unwinding of a sheet by improving a universal joint structure formed of a coupling that mates an input shaft of a rotary machine used for a vinyl house ventilation film sheet and a lower end of the rotary machine.SOLUTION: There is provided a universal joint structure T. A rotary transmission device 3 serves as a rotary machine which is used for winding and unwinding of a ventilation film sheet S which covers a vinyl house B. The rotary transmission device comprises a brake spring and a shaft pin such that an output shaft 39 can be rotated only by rotation of the input shaft 30. A lower end of the input shaft 30 of the rotary transmission device 3 is configured to be centered.SELECTED DRAWING: Figure 1

Description

The present invention belongs to the technical field of a universal joint suitable for a rotating machine used for winding up a film sheet for ventilation, which covers a vinyl house in the longitudinal direction, as illustrated in FIG. Ventilation film sheets installed in the valleys of vinyl houses, ventilation film sheets covering the side and end surfaces of vinyl houses, lining fill sheets and nets inside vinyl houses, film sheets in high places inside and outside vinyl houses It relates to a universal joint for a rotating machine of a film sheet used for ventilation of a vinyl house that smoothly winds up and unwinds the film sheet.

Conventionally, the present applicant has been manufacturing and implementing a rotating machine as shown in FIG. 7 as a rotating machine for ventilation film sheets. In a casing (not shown), a bevel gear a comprising a driving bevel gear a1 and a driven bevel gear a2 intersecting with the driving bevel gear a1 in an orthogonal arrangement, and a rotation transmission device b for driving the bevel gear a. , and a support housing c that supports the rotation transmission device b is loaded as a main component. The support housing c (shaft k) supporting the bevel gear a and the rotation transmission device b is sandwiched between left and right clamping plates d of a pair of left and right sheet metal parts via spacers e, and the sheet metal parts are sandwiched from above and below. A lid f and a bottom plate g are arranged as parts, that is, covered with a bottom plate g arranged at the lower end and a lid f arranged at the upper end, and each part is secured by a large number of bolts h (or screws or rivets). The bevel gear a is positioned and fixed by assembling and fixing.

As a joint connected to the input shaft of the rotating machine as described above, for example, a winder disclosed in Patent Document 1 has a swinging means arranged at the end of the intermediate shaft on the side of the rotation input shaft in the longitudinal direction of the intermediate shaft. A pin insertion hole penetratingly formed in an intersecting direction, a housing recess provided in the intermediate shaft side end of the rotation input shaft to accommodate the rotation input shaft side end of the intermediate shaft, and a pin insertion hole through which rotation is performed. a swing pin attached to the input shaft, the pin insertion hole having a central portion narrowed to a small diameter slightly larger than the shaft diameter of the swing pin, and gradually extending from the small diameter central portion toward both open ends. The rotary input shaft and the operation rod are rotated by sliding and swinging the swing pin along the inner peripheral surface of the pin insertion hole in a range of 360 degrees around the center portion of the small diameter as a fulcrum. are swingably connected (see claim 1, paragraph [0008], etc. of Document 1).
An elastic member using a compression coil spring is compressed between the partition wall, which is the bottom wall of the upper accommodation recess, and the lower end of the lower shaft, which is the end surface of the intermediate shaft on the rotation input shaft side, The elastic force of the elastic member acts upward on the intermediate shaft so that the shaft portion of the swing pin comes into contact with the lower portion of the small-diameter central portion of the pin insertion hole. paragraph [0023]).

Utility Model Registration No. 3182596

As a joint connected to the input shaft of a rotating machine that winds up and down the ventilation film sheet of a vinyl house, the structure according to Patent Document 1 has a large number of parts, and in particular, an elastic force using a compression coil spring. The setting is troublesome because it requires parts and the like. When a load is applied, the center shifts and the movement becomes worse. In particular, it has been pointed out that since the rocking pin is slidable 360 degrees along the inner peripheral surface of the pin insertion hole, the backlash increases and the movement slows down.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve a universal joint structure consisting of an input shaft of a rotary machine and a coupling that engages the lower end of the rotary machine used for the ventilation film sheet of a vinyl house so as to achieve centered smooth rotation. To provide a universal joint for a rotator of a film sheet excellent in usability by realizing motion, achieving smooth winding up and winding down of the film sheet.

As a means for solving the above problems, the invention described in claim 1 provides that the rotation transmission device 3 serving as a rotating machine for winding up and lowering the ventilation film sheet S covering the vinyl house B is a brake spring. Equipped with a shaft pin, the output shaft 39 is rotatable only by the rotation of the input shaft 30, and the lower end of the input shaft 30 of the rotation transmission device 3 is constructed in a centering universal joint T structure. It is a universal joint for a rotating machine of a film sheet.

In the invention described in claim 2, the rotating machine used for winding up and winding down the ventilation film sheet S covering the vinyl house B includes a bevel gear 2, a rotation transmission device 3 for driving the bevel gear 2, A support 4 for supporting the rotation transmission device 3 is loaded in the casing A, and the film sheet A winding shaft M attached to the end of S is freely connectable, and a groove portion 23 is formed on the outer circumference of the shaft 22 of the driven bevel gear 21 on the side of the winding shaft M connection. A bearing 5 is arranged in
The rotation transmission device 3 includes a brake spring and a shaft pin so that the output shaft 39 is rotatable only by the rotation of the input shaft 30, and the drive bevel gear 20 is connected to the output shaft 39. 4, and the lower end of the input shaft 30 of the rotation transmission device 3 is constructed in a centering universal joint T structure. It is a universal joint for

In the invention described in claim 3, the lower end portion of the rotation transmission device 3 on the input shaft 30 side that constitutes the universal joint T is formed in a convex hemispherical shape to receive the convex hemispherical lower end portion 31 on the input shaft 30 side. The upper end portion of the coupling 7 is formed in a concave hemispherical shape, and the convex hemispherical lower end portion 31 on the input shaft 30 side is fitted to the concave hemispherical upper end portion 70 of the coupling 7 . A universal joint for a rotary machine for a film sheet according to claim 1 or 2.

In the fourth aspect of the invention, the outer circumference of the convex hemispherical lower end portion 31 on the input shaft 30 side is formed slightly smaller than the inner circumference of the concave hemispherical upper end portion 70 of the coupling 7 so that the coupling 7 does not swing. The universal joint for a film sheet rotary machine according to any one of claims 1 to 3, characterized in that it is fitted.

According to the fifth aspect of the invention, a pin hole 32 is formed laterally in the convex hemispherical lower end portion 31 on the input shaft 30 side, and a pin hole is formed in the concave hemispherical upper end portion 70 of the coupling 7. The pin hole 32 of the convex hemispherical lower end portion 31 on the input shaft 3 side is elongated vertically from the central portion 33 formed in a circular shape. The holes 35 gradually widen toward the left and right vertically elongated openings 34 formed in the shape, respectively. The universal joint for a film sheet rotary machine according to any one of claims 1 to 4, characterized in that it is configured to move only in the vertical direction as shown in the above.

In the film sheet rotary machine universal joint according to claims 1 to 5, the lower end portion on the input shaft side of the rotation transmission device having a universal joint structure is formed in a convex hemispherical shape, and the convex hemispherical shape lower end portion on the input shaft side is formed in a convex shape. The upper end of the receiving coupling is formed in a concave hemispherical shape, and both are fitted to each other to reduce the number of parts, so centered and smooth movement is realized even when a load is applied. In addition, the angle can be set large, and if the angle is set appropriately when new, smooth movement can be maintained even after long-term use, contributing to quality improvement.

A to E show universal joints for the film sheet rotator of the present invention. A is a cross-sectional view of B along the AA line, B is a side view, C is a cross-sectional view of E along the CC line, D is a cross-sectional view of E along the BB line, and E is a front view. A to H indicate the upper portion (lower end portion of the input shaft) of the universal joint shown in FIG. A is a front view showing the internal structure, B is a bottom view, C is a lower perspective view, D is a cross-sectional view on the CC line of A, E is a cross-sectional view on the BB line of A, F is a side view, and G is a side view. F is a sectional view taken along line AA, and H is an upper perspective view. AF show the lower part (coupling) of the universal joint shown in FIG. A is a front view showing the internal structure, B is a bottom view, C is a bottom perspective view, D is a cross-sectional view of A along line AA, E is a side view showing the internal structure, and F is a top perspective view. AE show general views showing a film sheet rotating machine universal joint. A is a front view, B is a side view, C is a cross-sectional view of the universal joint part shown in the AA line cross section of B, D is a lower perspective view showing the state where the universal joint part is separated, E is an upper side of D It is a perspective view. It is the perspective view which showed the use condition which attached the winding shaft and the handle shaft to the rotary machine. FIG. 2 is an overall view showing the state of implementation of a universal joint used in a rotating machine for ventilation film sheets that cover a vinyl house in the longitudinal direction. It is the perspective view (A), front view (B), side view (C), and rear view (D) which showed the conventional rotating machine.

The universal joint for rotating machine of the film sheet of the present invention is, for example, a plastic sheet covering the vinyl house B from the longitudinal side surface to the roof surface in a non-fixed state as shown in FIG. The lower end side (or the upper end side) of the film sheet S is wound around the winding shaft M, and the winding shaft M is rotated forward by the handle shaft H of the rotating machine, thereby smoothly winding up the film sheet S with a small force for ventilation. It is suitable for operating a ventilation opening/closing system in which a ventilation opening is formed, or conversely, the film sheet S is wound down by rotating the winding shaft M in the reverse direction to close the ventilation opening with the film sheet S. The ventilation film sheet S provided in the valley of the multi-span vinyl house B (not shown), the ventilation film sheet S covering the side and end surfaces of the vinyl house B, and the lining film sheet S inside the vinyl house B It is also suitable for winding up and lowering a net, a film sheet B at a high place inside and outside the vinyl house B, and the like.

The basic mode of use is that a casing A as shown in FIG. It is A shaft 22 of a driven bevel gear 21 meshing with a drive bevel gear 20 constituting the bevel gear 2 described later is connected to a winding shaft M attached to an end of a film sheet S covering a vinyl house B. The lower end of the input shaft 30 of the rotation transmission device 3 is configured to have a centering universal joint T structure, and by rotating the rod-shaped handle shaft H connected to this universal joint T, the winding shaft M By rotating, the film sheet S is smoothly wound up and down (Fig. 6).

Although a detailed view of the internal structure of the rotation transmission device 3 is omitted, for example, a coil having a hook portion that is arranged in a cylindrical braking drum 36 in an inscribed state and bent so that both end portions protrude inward. An input shaft 30 and an output shaft 39 are disposed so as to face each other rotatably around the coaxial pin at both ends of a shaft pin arranged on the rotation center line, and the input shaft 30 and the output shaft 39 The rotation transmitting portion and the rotation transmitting portion protrude from each inner end of the input shaft 30 in parallel with the shaft pin, and the rotation transmitting portion of the input shaft 30 abuts against the hook portions at both ends of the brake spring. A structure is adopted in which the diameter of the brake spring is reduced by pressing the brake spring, and the diameter of the brake spring is expanded by abutting the rotation transmitting portion of the output shaft 39 against the outer side of the hook portion. 7 and 8 is attached to the input shaft 30 protruding outside the braking drum 36, and the bevel gear 2 is attached to the output shaft 39 protruding to the opposite side of the outside of the braking drum 36. (drive bevel gear 20) is connected. In particular, an embodiment in which the input shaft 30 and the output shaft 39 are formed of stainless steel pipe bodies having through holes is preferable. Such stainless steel castings provide strength and flexibility in shape.
The rotation transmission device 3 in which the output shaft 39 is rotatable only by the rotation of the input shaft 30 with the brake spring and the shaft pin has the drive bevel gear 20 connected to the output shaft 39 as will be described later. It is supported by a cylindrical support 4 in a state of being.

As shown in FIGS. 4 and 5, in the bevel gear 2 of this embodiment, a large driven bevel gear 21 is meshed at right angles to a horizontally arranged small drive bevel gear 20 forming the bevel gear 2. The winding shaft M attached to the end of the film sheet S is connectable to the shaft 22 of the driven bevel gear 21 on the winding shaft M side. The shaft 22 is formed in a penetrating shaft hole 24, and the winding shaft M is connectable to the shaft hole 24 from either the front side or the rear side. In this embodiment, as shown in the upper right of FIG. 5, the winding shaft M is connected to the shaft hole 24 on the rear surface. A groove is formed on the outer circumference of the shaft 22 of the driven bevel gear 21 on the winding shaft M connection side, and a bearing 23 (see FIG. 5) is arranged on the outer circumference of the groove. The bearing 23 is fixed by fitting a fixed body 6 with a bolt hole formed in an inverted U shape from the outside.

The universal joint T of this embodiment, which is suitable for the rotation transmission device 3 forming the rotating machine described above, will be described.
As shown in FIGS. 1 to 4, the lower end portion of the rotation transmission device 3 on the side of the input shaft 30 that constitutes the universal joint T is curved in a convex hemispherical shape (FIG. 2), and the input The upper end portion of the coupling 7 that receives the convex hemispherical lower end portion 31 on the shaft 30 side is curved into a concave hemispherical shape (FIG. 3), and the convex hemispherical lower end portion 31 on the input shaft 30 side It is fitted to the concave hemispherical upper end portion 70 of the coupling 7 (Fig. 1).

Specifically, the outer circumference of the convex hemispherical lower end portion 31 on the input shaft 30 side of the rotation transmission device 3 described above is slightly larger than the inner circumference of the concave hemispherical upper end portion 70 of the coupling 7, as shown in FIG. 1D. The dimensional difference of the hemispherical shape that is formed small and fitted is reduced, and even if it is angled, it will be centered and will not swing and the center will not shift. A pin hole 32 formed laterally in the convex hemispherical lower end portion 31 on the input shaft 30 side and a pin hole 71 formed in the concave hemispherical upper end portion 70 of the coupling 7 are the center points of the insertion pin P. are connected by a pin P that is inserted in common so that the positions are the same.

The pin hole 32 of the convex hemispherical lower end portion 31 on the input shaft 3 side is, as shown in FIG. It is formed with a divergent bore, each of which diverges progressively into section 34 (FIGS. 1A, C). Therefore, the circular central portion 33 is used as the central point, and the insertion pin P moves within the range of the left and right widening holes (32) while being restricted only in the vertical direction like a seesaw. If the opening 34 were formed in a circular shape of 360°, the rattle would rather increase and the movement would become dull. A smooth rotational motion is realized.
Reference numeral 72 in FIG. 3 denotes a hollow connecting recess into which the upper end portion of the handle shaft H can be fitted from below and can be fixed therein, and reference numeral 73 denotes a connecting hole for connecting with the handle shaft H. The upper end of the connecting recess 72 is formed into a fitting portion 72a having a two-step structure with inner diameters of about 19 mm and about 22 mm, so that handle shafts H of different sizes can be connected.

Although the embodiments have been described above with reference to the drawings, the present invention is not limited to the illustrated examples, and includes the range of design changes and application variations that are normally made by those skilled in the art without departing from the technical idea of the present invention. Just in case.

T Universal joint B Vinyl house S Film sheet M Winding shaft H Handle shaft P Pin A Casing 1 Bolt 2 Bevel gear 20 Drive bevel gear 21 Driven bevel gear 22 Shaft 24 Shaft hole 3 Rotation transmission device 30 Input shaft 31 Convex hemispherical lower end 32 pin hole (divergent hole)
33 Circular central portion 34 Longitudinal opening 4 Supporting body 6 Inverted U-shaped fixed body 7 Coupling 70 Concave hemispherical upper end 71 Pin hole 72 Connecting recess 73 Connecting hole 8 Holding plate 9 Bearing plate

Claims (5)

A rotation transmission device serving as a rotating machine for winding up and lowering a ventilation film sheet covering a vinyl house is provided with a brake spring and a shaft pin, and an output shaft is rotatable only by rotation of an input shaft, and 1. A universal joint for a film sheet rotating machine, wherein the lower end of the input shaft of the rotation transmission device is configured to have a centering universal joint structure. A rotating machine used for winding up and winding down a ventilation film sheet covering a vinyl house comprises a bevel gear, a rotation transmission device for driving the bevel gear, and a support for supporting the rotation transmission device. A winding shaft attached to an end portion of the film sheet is freely connectable to the shaft of the driven bevel gear that meshes with the driving bevel gear forming the bevel gear in a perpendicular arrangement, and the driven bevel gear A groove is formed on the outer periphery of the shaft on the winding shaft connection side, and a bearing is disposed on the outer periphery of the groove,
The rotation transmission device includes a brake spring and a shaft pin so that the output shaft is rotatable only by the rotation of the input shaft, and the output shaft is supported by a support while the driving bevel gear is connected. 2. The universal joint for a film sheet rotary machine according to claim 1, wherein the lower end of the input shaft of said rotation transmission device is constructed in a centering universal joint structure. The lower end portion on the input shaft side of the rotation transmission device constituting the universal joint is formed in a convex hemispherical shape, and the upper end portion of the coupling that receives the convex hemispherical lower end portion on the input shaft side is formed in a concave hemispherical shape. 3. The freewheel for a film sheet rotating machine according to claim 1, wherein the convex hemispherical lower end on the input shaft side is fitted into the concave hemispherical upper end of the coupling. fittings. An outer periphery of the convex hemispherical lower end portion on the input shaft side is formed slightly smaller than an inner periphery of the concave hemispherical upper end portion of the coupling so that they are fitted without rocking. 4. A universal joint for a rotating machine of the film sheet according to any one of 1 to 3. A pin hole formed laterally in the convex hemispherical lower end on the input shaft side and a pin hole formed in the concave hemispherical upper end of the coupling are connected by a pin inserted in a common position. , The pin hole of the convex hemispherical lower end portion on the input shaft side is formed as a divergent hole that gradually widens from the central portion formed in a circular shape to the left and right vertically elongated openings formed in a vertical oval shape. With the circular central portion as the center point, the insertion pin moves only in the vertical direction like a seesaw within the range of the left and right diverging holes. A universal joint for a rotating machine of the film sheet according to any one of the items.

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