JP2022072276A - Tightening joint for rotation transmission device - Google Patents

Abstract

To provide a tightening joint for a rotation transmission device which can center and integrate an output shaft of the rotation transmission device and a winding shaft of a sheet when connecting them, can stably perform an operation such as the windup of the sheet of a vinyl house, and is excellent in operability.SOLUTION: An output shaft 13 of a rotation transmission device A and a winding shaft 1 wound up to a lower end 6' side or an upper end side of a sheet 6 which covers a vinyl house H are set so as to be freely interposable while being tightened to each other when connected to each other, and slits 31, 34 are formed in plurality of pieces in an axial direction at an opening part 30 at the output shaft 13 side and an opening part 33 at the winding shaft 1 side. Outer bolt holes 32, 32 at the output shaft 13 side which penetratingly oppose each other are formed at a side face avoiding the slit 31 at the output shaft 13 side in the vicinity of the opening part 30 at the output shaft 13 side, and the output shaft 13 is tightened and fixed with a bolt 4 for fastening both holes 13f, 32 in a state that inner bolt holes 13f, 13f which oppose each other while penetrating a side face of the output shaft 13 in the vicinity of a base end and the outer bolt holes 32, 32 coincide with each other.SELECTED DRAWING: Figure 1

Description

The present invention relates to a tightening joint for a rotation transmission device, and more specifically, a rotation transmission device side which is a drive unit of a rotary machine used for winding and lowering a sheet covering a greenhouse, and a winding shaft wound around the sheet. It belongs to the technical field of tightening joints that center and firmly connect the side.

The present applicant has developed the device described in Patent Document 1 below with respect to a rotation transmission device built in as a drive unit of a rotary machine suitable for operating a ventilation opening / closing system. That is, as shown in FIGS. 7 and 8, the torsion coil spring 11 (brake spring) is in contact with the inner peripheral surface of the braking drum 10 inside the cylinder of the braking drum 10 (cylinder casing). Installed in the state, the driven end portions 11a (hook portions) at both ends of the coil spring 11 are curved inward in the radial direction and in a semicircular shape facing each other in the circumferential direction, and are curved to the input shaft 12 and the output. The shaft 13 is arranged so as to rotatably face each other at both ends of the shaft pin 14, and the rotation transmitting portion 12c and the rotated transmission portion 13c protruding from the inner ends thereof in a direction parallel to the shaft pin 14 The rotation transmission portion 12c of the input shaft 12 hits the inner peripheral side of the semicircular shape with respect to the driven end portion 11a (hook portion) of the torsion coil spring 11 to reduce the diameter of the coil spring 11 and transmit the rotation of the output shaft 13 to the driven end portion 11a (hook portion). The portion 13c is a rotation transmission device A that abuts on the outer peripheral side of the semicircular shape to expand the diameter of the coil spring 11. In FIGS. 7 and 8, reference numeral 15 indicates a bearing sleeve, and reference numerals 13f and 12f indicate pin holes (bolt holes), respectively.

Further, in the following Patent Document 2 relating to the applicant, as shown in FIG. 9, one side (output shaft 13) of the rotation transmission device A in which the internal structure of the outer casing C is omitted and the vinyl house H are covered. The sheet winding shaft 6 at the lower end 6'of the seat 6 is connected via the joint B, and the winding shaft 1 can be rotated by the handle 18 connected to the other side (input shaft 12) of the device A, and the winding shaft 1 can be rotated. A rotation transmission device A having a configuration in which the single rotation of 1 is stopped is disclosed. The outer casing C is provided with a pipe through hole C2 through which a support pipe 7 is passed and can move up and down along the support pipe 7, and a handle C1 for supporting the outer casing C with one hand is installed (same as above). See paragraph [0012] of Patent Document 1).

Utility Model Registration No. 3180597 (Figs. 2 and 3) Japanese Patent No. 3752617 (Fig. 1)

The cast joint B exemplified in Patent Document 2 used in the rotation transmission device as described in Patent Document 1 has a large dimensional difference so that the output shaft 13 on one side can be fitted, so that the output shaft 13 has a large dimensional difference. It has been pointed out that it is difficult to center the metal and that it causes rattling.
Further, since a so-called push bolt that directly pushes the winding shaft 1 is used for tightening the winding shaft 1 (pipe) connected to the other side of the joint B, the winding shaft 1 of the sheet 6 may be constricted. Damage occurs. Moreover, since the tip end portion of the winding shaft 1 inserted into the joint B is not fixed, centering cannot be performed well, and play occurs when a load is applied, which has been a problem in the past.

Therefore, an object of the present invention is to improve the joint interposed when connecting the output shaft of the rotation transmission device and the winding shaft of the seat, and to center both shafts and connect them integrally to form a vinyl house seat. It is to provide a tightening joint for a rotation transmission device which can stably perform hoisting and lowering operations and has excellent operability.

As a means for solving the above problems, the invention according to claim 1 describes the rotation transmission device A side, which is the drive unit of the rotary machine K used for winding and unwinding the sheet 6 covering the vinyl house H, and the vinyl. In the joint connecting to the winding shaft 1 side wound on the sheet 6 of the house H,
The rotation transmission device A is a coil-shaped brake spring 11 having hook portions 11a and 11b arranged in an inscribed state in a tubular casing 10 and bent so as to project inward at both ends, and rotation. An input shaft 12 and an output shaft 13 that rotatably face each other around the coaxial pin 14 are arranged at both ends of the shaft pin 14 arranged on the center line, and the inner ends of the input shaft 12 and the output shaft 13 are respectively arranged. The rotation transmission portion 12c and the rotation transmission portion 13c are projected in parallel with the shaft pin 14, and the rotation transmission portion 12c of the input shaft 12 is a hook portion 11a with respect to the hook portions 11a and 11b at both ends of the brake spring 11. , The diameter of the brake spring 11 is reduced by abutting on the inner portion of 11b, and the rotated transmission portion 13c of the output shaft 13 is configured to abut on the outer portions of the hook portions 11a and 11b to expand the diameter of the brake spring 11. ,
The output shaft 13 of the rotation transmission device A and the winding shaft 1 wound around the lower end 6'side or the upper end side of the sheet 6 covering the vinyl house H are tightened and intervened when connected. Tightening for a rotation transmission device, characterized in that one or a plurality of slits 31 and 34 are formed in the opening 30 on the output shaft 13 side and / or the opening 33 on the winding shaft 1 side in the axial direction. It is a joint.

2. 32 is formed, and both holes 13f, 32 are fastened in a state where the inner bolt holes 13f, 13f facing through the side surface near the base end of the output shaft 13 and the outer bolt holes 32, 32 match. The tightening joint for a rotation transmission device according to claim 1, wherein the output shaft 13 is tightened and fixed by a bolt 4.

In the third aspect of the present invention, a projecting piece 36 with a protruding bolt hole 35 is provided on the outer peripheral surface in the vicinity of the opening 33 on the winding shaft 1 side so as to sandwich each slit 34 on the winding shaft 1 side vertically. The winding shaft 1 is formed, and the winding shaft 1 is tightened and fixed by a bolt 5 for fastening the protruding bolt hole 35 in a state where the winding shaft 1 is connected to the opening 33 on the winding shaft 1 side. , The tightening joint for the rotation transmission device according to claim 1 or 2.

The invention according to claim 4 is characterized in that a plurality of non-slip recesses 37 of the winding shaft 1 to be connected are formed on the inner wall surface 3a near the opening 33 on the winding shaft 1 side. The tightening joint for the rotation transmission device according to any one of 1 to 3.

In the invention described in claim 5, the inner wall surface is formed in a tapered shape that narrows in the direction of the output shaft 13, and in the large-diameter winding shaft 1, the tip of the winding shaft 1 abuts on the tapered inner wall surface 38 and is centered. According to any one of claims 1 to 4, the winding shaft 1 having a small diameter is characterized in that the tapered inner wall surface 38 ends and its tip abuts on the cylindrical inner wall surface to be centered. It is a tightening joint for the rotation transmission device described.

The invention according to claim 6 is characterized in that a spacer 39 to which a small-diameter winding shaft 1 is fitted is detachably configured in the opening 33 on the winding shaft 1 side. The tightening joint for the rotation transmission device according to any one of the above items.

The tightening joint for the rotation transmission device according to claim 1 is tightened when the output shaft of the rotation transmission device and the winding shaft wound on the lower end side or the upper end side of the sheet covering the vinyl house are connected. One or more slits are formed in the axial direction in the opening on the output shaft side and the opening on the winding shaft side, and the connected output shaft and winding shaft are tightened and centered. Since it can be integrated and fixed, it has excellent operability that enables stable winding and unwinding operations of greenhouse sheets.

A is a cross-sectional view (B-B line cross section of B) showing the usage state of the tightening joint (FIG. 2) for the rotation transmission device of the present invention, B is the front view, C is the perspective view, and D is the spacer. It is a cross-sectional view (A-A line cross section of E) which showed the use state of the tightening joint which used, E is the front view, and F is the perspective view. A is a perspective view showing the tightening joint, B is the left side view, C is a cross-sectional view showing the internal structure of the tightening joint (AA line cross section of D), D is the same plan view, and E is the same front surface. In the figure, F is the same perspective view, G is the right side view, and H is the same perspective view. A is a cross-sectional view (B-B line cross section of B) showing the usage state of different tightening joints (FIG. 4), B is the same front view, C is the same perspective view, and D is a tightening joint using a spacer. A cross-sectional view showing a state of use (cross-sectional view taken along the line AA of E), E is a front view, and F is a perspective view. A is a perspective view showing different tightening joints, B is a front view of a cross section of the same part (cross section of BB of H), C is a perspective view of the same part (and a perspective view of a spacer), D is a right side view of the same part, E. Is a cross-sectional view showing the internal structure of the tightening joint (A-A line cross section of F), F is a front view of the same, G is a plan view of the same, and H is a right side view of the same. A is a perspective view showing a state in which a pipe type output shaft is connected to the tightening joint of FIG. 2, and B is a perspective view showing a winding shaft having a smaller diameter with a spacer interposed therebetween. A is a perspective view showing a state in which a pipe type output shaft is connected to the tightening joint of FIG. 4, and B is a perspective view showing a winding shaft having a smaller diameter with a spacer interposed therebetween. It is a perspective view which showed the rotation transmission device disassembled. FIG. 7 is a partially cutaway front view showing an assembled state of the rotation transmission device of FIG. 7. It is a perspective view which showed the implementation situation of the general joint which connected the conventional rotation transmission device and a winding shaft.

The tightening joint for the rotation transmission device of the present invention is made of plastic, which covers the vinyl house H illustrated in FIG. 9 from the side surface to the roof surface in a non-fixed state and is fastened only at the upper end (or lower end). The following rotation transmission device A suitable for the winding shaft 1 around which the lower end 6'side (or the upper end side) of the film sheet 6 is wound and the internal drive portion of the rotary machine K used for winding and lowering the film sheet 6. The output shaft 13 is centered and firmly connected. As a result, by rotating the winding shaft 1 in the normal direction with the handle 18 of the rotary machine while grasping the support rod C1, the film sheet 6 is smoothly wound up with a small force to form a ventilation opening (not shown), or On the contrary, the ventilation opening / closing system is operated without difficulty by rotating the winding shaft 1 in the reverse direction to wind down the film sheet 6 and closing the ventilation opening with the film sheet 6.

On the other hand, the basic configuration of the rotation transmission device A to be connected is a coiled brake spring 11 having hook portions 11a and 11b bent so as to project both ends of the tip and the base end inward in the radial direction. It is arranged inscribed in a cylindrical casing 10 having an inner diameter of about 28 mm. Further, in the casing 10, an input shaft 12 and an output shaft 13 that rotatably face each other around the coaxial pin 14 are arranged at both ends of the shaft pin 14 arranged on the rotation center line. Then, the rotation transmitting portion 12c and the rotated transmission portion 13c are projected from the inner ends of the input shaft 12 and the output shaft 13 in parallel with the shaft pin 14, with respect to the hook portions 11a and 11b at both ends of the brake spring 11. The rotation transmission portion 12c of the input shaft 12 abuts on the inner portions of the hook portions 11a and 11b to reduce the diameter of the brake spring 11, and the rotation transmission portion 13c of the output shaft 13 is the outer portion of the hook portions 11a and 11b. The brake spring 11 is configured to expand the diameter in contact with the brake spring 11. Inner bolt holes 13f and 12f that penetrate and face each other are formed on the side surfaces of the output shaft 13 and the input shaft 12 in the vicinity of the base ends (see FIGS. 7 and 8).
The brake spring 11 has a thickness of about 2.5 mm, a height of about 2.0 mm, and an outer diameter of about 4.3 turns and about 28.3 mm at both ends thereof. Hook portions 11a and 11b, which are driven respectively, are formed. Each of the hook portions 11a and 11b has a U-shape curved inward in the radial direction, and is arranged so as to be included in both side edges of the rotation transmission portion 12c of the input shaft 12.

Both the input shaft 12 and the output shaft 13 illustrated in FIG. 7 have substantially the same shape, the same size, and a substantially symmetrical configuration, have an outer diameter that fits in the inner diameter portion of the brake spring 11, and have a constant size. It is manufactured in a thick tubular body that can transmit the rotational torque of. The input shaft 12 and the output shaft 13 are provided with shaft holes 12c, 13c for the shaft pin 14 on the inner end side of the shaft portions 12a, 13a, which are basically cylindrical bodies having the same diameter and bottom. Disc-shaped disc portions 12b and 13b having a slightly large diameter are formed, respectively, and a rotation transmission portion 12c and a rotation transmission portion 13c having a substantially arcuate cross section extending inward from the disc portions 12b and 13b are formed. The bow-shaped angle of the rotation transmitting portion 12c of the present embodiment is about 170 °, and the bow-shaped angle of the rotated transmission portion 13c is about 160 °. The output shaft 13 and the input shaft 12 are preferably made of solid iron, aluminum, or the like (however, the material is not limited to this). Further, it can be suitably applied to a pipe type output shaft 13'(and an input shaft) as shown in FIGS. 5 and 6.
When assembled as illustrated in FIG. 8, the bearing sleeve 15 shown in FIG. 7 is fitted to the input shaft 12 and the output shaft 13 to the positions where they are in close contact with the disc portions 12b and 13b, respectively, and is shown in FIG. The disc portions 12b and 13b are supported by the outer casing C of the rotary machine K of the illustrated form, and a stable rotatable state of the input shaft 12 and the output shaft 13 is ensured.

A tightening joint 3 suitable for connecting the output shaft 12 of the rotation transmission device A having the above-described configuration and the winding shaft 1 (pipe) wound around the lower end 6'side or the upper end side of the film sheet 6 covering the vinyl house H ( The specific configuration of 3') will be described with reference to FIGS. 1 to 6.
The tightening joint 3 is used to fasten (intervene) the output shaft 13 of the rotation transmission device A described above on one side and the winding shaft 1 of the film sheet 6 on the other side. 1 and 2 are embodiments (3) in which a pair of slits 31 and 31 notched in the axial direction are provided in a facing state only in the opening 30 opened on the output shaft 13 side, and FIGS. 3 and 4 show FIGS. 3 and 4. Further, an embodiment (3') is shown in which a pair of slits 34, 34 notched in the axial direction are provided in a facing state in the opening 33 opened on the winding shaft 1 side. However, the number of slits 31 and 34 is not limited to this, and one or a plurality of slits 31 and 34 may be provided at equal intervals (not shown).

The tightening joint 3 shown in FIG. 2 penetrates and faces the side surface of the output shaft 13 side avoiding each slit 31 in the vicinity of the opening 30 (diameter is about 19.5 mm) on the output shaft 13 side. Outer bolt holes 32, 32 on the output shaft 13 side are formed (FIG. 2A). The outer bolt hole 32 on the outlet side of the bolt 4 screwed here is formed in a female screw (FIG. 2C). Outer bolt holes 32a and 32a on the opposite winding shaft 1 side are formed on the side surface of the tightening joint 3 near the opening 33 on the winding shaft 1 side. The outer bolt holes 32a and 32a are formed in female threads. Further, the inner wall surface 3a of the tightening joint 3 is formed in a tapered shape that narrows in the output shaft 3 direction, and in the large-diameter winding shaft 1, the tip of the winding shaft 1 abuts on the tapered inner wall surface 38 and has the large diameter. The winding shaft 1 can be centered (see FIGS. 2C, 1A, 4E, and 3A). Further, in the small-diameter winding shaft 1, the tip of the tapered inner wall surface 38 comes into contact with the cylindrical inner wall surface 3a so that the small-diameter winding shaft 1 can be centered.
In the figure, reference numeral 3b indicates a hole for firmly fixing the winding shaft 1 with a self-tapping screw.
Therefore, when the shaft portion 13a (diameter is about 19.5 mm) at the base end of the output shaft 13 is inserted into the opening 30 on the output shaft 3 side of the tightening joint 3, the slits 31 and 31 act to open the opening. The output shaft 13 is centered and can be connected without difficulty while expanding the diameter of the portion 30. Further, when the diameter of the output shaft 13 is smaller than the diameter of the tightening joint 3, the connection can be made without difficulty. After that, with the inner bolt holes 13f and 13f facing through the side surface near the base end of the output shaft 13 and the outer bolt holes 32 and 32 in line with each other, both holes 13f and 32 are tightened with bolts 4. The output shaft 13 can be firmly fixed (FIG. 1).

On the other hand, the winding shaft 1 of the sheet 6 is inserted into the opening 33 on the winding shaft 1 side of the tightening joint 3. The tip of the winding shaft 1 abuts on the tapered inner wall surface 38 of the tightening joint 3 to center the winding shaft 1 and prevent rattling. After that, the winding shaft 1 can be securely fixed by screwing and tightening the bolts 5 and 5 into the facing outer bolt holes 32a and 32a, respectively. Thus, the output shaft 13 and the winding shaft 1 are integrally and firmly fixed via the tightening joint 3 (FIGS. 1A to 1C).
When connecting the small-diameter winding shaft 1, the small-diameter winding shaft 1 is connected with the spacer 39 to be fitted interposed therebetween. As shown in FIG. 4C, the spacer 39 is formed with large notches 39a and 39a facing the opening side surface of the bottomed cylindrical body, and the flange portion for a stopper is formed at the opening end edge avoiding the notches 39a and 39a. 39b and 39b are formed in a facing state. Therefore, at the opening 33 on the winding shaft 1 side of the tightening joint 3, after inserting the winding shaft 1 into the opening 33 with the spacer 39 interposed therebetween, the outer bolt holes 32a, 32a and the spacer 39 of the tightening joint 3 With the notches 39a and 39a aligned, the winding shaft 1 is tightened and fixed by the bolts 5 and 5 (FIGS. 1D to 1F).

The tightening joint 3'shown in FIG. 4 protrudes from the outer peripheral surface near the opening 33 (diameter is about 24 mm) on the winding shaft 1 side so as to sandwich each slit 34 on the winding shaft 1 side. Projection pieces 36 with bolt holes 35 are formed on the left and right sides. The protruding bolt hole 35 is formed in a female screw hole. Further, a plurality of non-slip recesses 37 of the winding shaft 1 to be connected are formed on the inner wall surface 3a near the opening 33 on the winding shaft 1 side in the tightening joint 3 (FIGS. 4C, E, H).
Therefore, as shown in FIG. 3, in one of the tightening joints 3, the output shaft 13 of the rotation transmission device A is screwed into the outer bolt hole 32 inserted through the slit 31 as described above. It is tightened firmly. Further, with the winding shaft 1 being inserted into the opening 33 on the winding shaft 1 side while being centered, the left and right protruding bolt holes 35 and 35 are screwed into the bolts 5 and 5, respectively, so that the winding shaft 1 is firmly inserted. It is tightened and fixed (FIGS. 3A to 3C). In the case of the winding shaft 1 having a small diameter, the same can be performed with the spacer 39 interposed therebetween (FIGS. 3D to F).

Further, the pipe-type output shaft 13'forming the shaft portion 13a'provided with the rotated transmission portion 13c' as shown in FIGS. 5 and 6 is also suitably tightened to the tightening joint 3 in the same manner as described above. It is fixed. 5A and 6A are embodiments in which a pipe-type output shaft 13'is connected to the tightening joints 3 and 3'shown in FIGS. 2 and 4, and FIGS. 5B and 6B further include a spacer 39. An embodiment is shown in which a winding shaft 1 having a small diameter is connected by interposing it.

Although the examples have been described above based on the drawings, the present invention is not limited to the illustrated examples, and includes a range of design changes and application variations normally performed by those skilled in the art within a range not deviating from the technical idea. I would like to add it just in case.

A Rotation transmission device K Rotating machine H Vinyl house 1 Winding shaft 10 Casing 11a, 11b Hook part 12 Input shaft 12a Shaft part 12b Disc part 12c Rotation transmission part 12f Inner bolt hole 13, 13'Output shaft 13a, 13a' Shaft part 13b Disc 13c, 13c'Rotated transmission 13f Inner bolt hole 14 Shaft pin 3, 3'Tightening joint 3a Inner side surface 30 Opening 31 Slit 32 Outer bolt hole 33 Opening 34 Slit 35 Protruding bolt hole 36 Projection piece 37 Sliding Stop recess 38 Tapered inner wall surface 39 Spacer 4, 5 Bolt 6 Film sheet 6'Low end

Claims (6)

In the joint connecting the rotation transmission device side, which is the drive unit of the rotary machine used for winding and lowering the sheet covering the vinyl house, and the winding shaft side wound on the sheet of the vinyl house.
The rotation transmission device is arranged in an inscribed state in a tubular casing, and is arranged on a rotation center line and a coil-shaped brake spring having hook portions bent so as to project inward at both ends. An input shaft and an output shaft that rotatably face each other around the coaxial pin are arranged at both ends of the shaft pin, and a rotation transmission part and a rotated transmission part are formed from the inner ends of the input shaft and the output shaft. It is projected in parallel, and the rotation transmission part of the input shaft abuts on the inner part of the hook part with respect to the hook parts at both ends of the brake spring to reduce the diameter of the brake spring, and the rotated transmission part of the output shaft is said. The structure is such that the brake spring is expanded in diameter by contacting the outer part of the hook part.
The output shaft of the rotation transmission device and the winding shaft wound around the lower end side or the upper end side of the sheet covering the vinyl house can be tightened and intervened when connected, and the opening on the output shaft side and the opening can be freely accommodated. / Or a tightening joint for a rotation transmission device, characterized in that one or a plurality of slits are formed in the opening on the winding shaft side in the axial direction. An outer bolt hole on the output shaft side that penetrates and opposes is formed on the side surface in the vicinity of the opening on the output shaft side avoiding each slit on the output shaft side, and penetrates the side surface near the base end of the output shaft. The rotation transmission device according to claim 1, wherein the output shaft is tightened and fixed by a bolt that fastens both holes in a state where the inner bolt holes and the outer bolt holes that face each other are matched with each other. Tightening joint. On the outer peripheral surface near the opening on the winding shaft side, a protrusion with a protruding bolt hole is formed so as to sandwich each slit on the winding shaft side at the top and bottom, and the winding shaft is formed at the opening on the winding shaft side. The tightening joint for a rotation transmission device according to claim 1 or 2, wherein the winding shaft is tightened and fixed by a bolt that fastens the protruding bolt hole in a connected state. The rotation transmission device according to any one of claims 1 to 3, wherein a plurality of non-slip recesses of the winding shaft to be connected are formed on the inner wall surface in the vicinity of the opening on the winding shaft side. Tightening joint for. The inner wall surface is formed in a tapered shape that narrows in the direction of the output shaft. The tightening joint for a rotation transmission device according to any one of claims 1 to 4, wherein the tip of the inner wall surface is brought into contact with the inner wall surface having a columnar shape and centered. The rotation transmission device according to any one of claims 1 to 5, wherein a spacer for fitting a small-diameter winding shaft is detachably configured in the opening on the winding shaft side. Tightening joint.

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