JPH09142296A - Driving member of fluid pressure conveying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving member which is reformed by improving the strength of a flexible shaft, realizing the simplicity in the assembling, and reducing the cost. SOLUTION: In this device, a driving member 3 furnishing an inner magnet device moving in a conduit 1 which consists of a nonmagnetic body by a pressure fluid is provided, a follower member 5 furnishing an outer magnet device 4 corresponding to the inner magnet device of the driving member 3 is provided slidable at the outer side of the conduit 1, a supporting device of a conveying article is provided to the follower member 5, and the magnets of the inner magnet device are supported by a flexible shaft 70. In this case, the flexible shaft 70 is made of a nylon or a urethane tube, its both ends are inserted to the axial center holes of a pair of guide members 9 to hold the inner magnet device, screws 21 are screwed in to the axial center holes from the outer side, and the diameter of the nylon or the urethane tube is expanded, so as to squeeze the nylon or the urethane tube to the inner wall of the diameter expanding parts of the axial center holes, to be fixed unremovable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving member of a fluid pressure transfer device, and more particularly, to a driving member having an inner magnet device which is moved by a pressurized fluid in the conduit, and is arranged outside the conduit. Also, the present invention relates to a driving member of a fluid pressure transfer device in which a driven member having an outer magnet device is linked to move a load supported by the driven member.

[0002]

2. Description of the Related Art As shown in FIG. 5, there is provided a driving member 3 having an inner magnet device 2 which travels in a conduit 1 made of a non-magnetic material by a pressurized fluid, and corresponds to the inner magnet device 2 of the driving member 3. A driven member 5 having an outer magnet device 4 is provided slidably on the outside of the conduit 1, a support device (not shown) for a conveyed object is provided on the driven member 5, and an inner magnet device in the driving member 5 is provided. A fluid pressure transfer device 18 in which two magnets 6 are supported by a flexible shaft 7 with a buffer 8 interposed therebetween is already known (JP-A-6-56269).

The inner magnet device 2 of the driving member 3 moving in the conduit 1 has a flexible shaft 7 made of a solid rod such as urethane.
The plurality of magnets 6 penetrate through the buffer body 8, and both ends are respectively inserted into the axial holes 10 of the guide member 9 and connected by orthogonal spring pins 11. The magnet 6 is sandwiched between two non-magnetic fastening members 12. The guide member 9 fixes the packing 13 sliding on the inner peripheral surface of the conduit 1 or 1 or 2
Are formed on the outer peripheral surface.

The outer magnet device 4 is fixed to the driven member 5 by holding a magnet 14 corresponding to the magnet 6 of the inner magnet device 2 with a holding member 15 made of a non-magnetic material. As shown in FIG. 6, the outer magnet device 4 of the driving member 3 is fixed to the carrier 16 outside the conduit 1, as shown in FIG.
These are formed in a C-shaped cross section as a whole, cover the conduit 1, and are movably mounted with the support 19 of the conduit 1 interposed therebetween. A plurality of rollers 17 are rotatably mounted in a radial arrangement.

[0005]

However, the conventional driving member 3 which connects the flexible shaft 7 with the spring pin 11 is used.
In operation, a collision occurs due to high-speed movement without deceleration at the end of the conduit 1, poor lubrication in the conduit 1, or the spring pin 11 is bored out of the axis of the flexible shaft 7. Hole 7a through which the spring pin 11 is inserted
In some cases, the stress was concentrated on the flexible shaft 7 and the flexible shaft 7 was broken from the place.

Further, when the driving member 3 is assembled, a hammer may be used to drive the spring pin 11 from the guide member 9 to the flexible shaft 7. In this case, the hammer is damaged and the guide member 9 is damaged. Was sometimes attached.

Further, a spring pin 11 is attached to the flexible shaft 7.
Since the holes 7a for inserting the flexible shafts 7 must be formed with high accuracy at right angles, the cost of the flexible shaft 7 is increased.

Accordingly, an object of the present invention is to provide a driving member of a fluid pressure transfer device which can solve all of the above disadvantages.

[0009]

According to the present invention, a driving member of a fluid pressure transfer device includes a driving member having an inner magnet device which is moved by a pressurized fluid in a conduit made of a non-magnetic material. A driven member having an outer magnet device corresponding to the inner magnet device is slidably provided outside the conduit, a support device for a conveyed article is provided on the driven member, and each of the inner magnet devices in the driving member is provided. In the transfer device supporting the magnets by a flexible shaft, the flexible shaft is made of a synthetic resin tube, and both ends of the flexible shaft are inserted into shaft holes of a guide member for holding the magnet of the inner magnet device, respectively. In addition, a screw is screwed into the shaft hole from the outside to expand the diameter of the synthetic resin tube, pressed against the inner wall surface of the shaft hole, and fixed so that it cannot be removed.

[0010] The synthetic resin tube is a nylon tube. The shaft hole has a hole having the same inner diameter as the outer diameter of the flexible shaft, an enlarged hole having a diameter larger than that, and a screw portion, and the screw has a larger diameter than the inner diameter of the flexible shaft. A guide portion having a small outer diameter and a press-in portion larger than the inner diameter of the flexible shaft are integrally formed with a step portion interposed therebetween, and have a screw portion screwed with a screw portion of the shaft hole. And

Therefore, since the flexible shaft and the guide member are connected by the screw which expands the end of the flexible shaft and presses and fixes the flexible shaft against the inner wall of the shaft hole, the solid shaft made of conventional urethane is used. Without using a spring pin compared to a flexible shaft,
Also, there is no need to drill the insertion hole.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In the figure, the same parts as those in the conventional example will be described using the same reference numerals.

As shown in FIG. 1, a driving member 3 having an inner magnet device 2 which is moved by a pressurized fluid in a conduit 1 made of a non-magnetic material is provided, and an outer member corresponding to the inner magnet device 2 of the driving member 3 is provided. A driven member 5 having a magnet device 4 is slidably provided on the outside of the conduit 1, and the driven member 5
A supporting device (not shown) for the transported object is provided in the apparatus, and the magnet 6 of the inner magnet device 2 in the driving member 5 is interposed by the flexible shaft 70 with the buffer 8 interposed therebetween.

In the inner magnet device 2 of the driving member 3 which moves in the conduit 1, the flexible shaft 70 penetrates the plurality of magnets 6 with the buffer bodies 8 interposed, and both ends thereof have the axial center holes of the guide members 9, respectively. 10
And are connected by screws 20. The magnet 6 is sandwiched between two non-magnetic fastening members 12. The guide member 9 has two grooves 9 a formed on the outer peripheral surface for fixing the packing 13 slidably contacting the inner peripheral surface of the conduit 1.

The outer magnet device 4 is fixed to the driven member 5 by holding a magnet 14 corresponding to the magnet 6 of the inner magnet device 2 with a holding member 15 made of a non-magnetic material. This driven member 5 is similar to the above-mentioned conventional example, and the outer magnet device 4 of the driving member 3 is fixed to the carrier 16 outside the conduit 1 as shown in FIG. A plurality of rollers 17 that cover the conduit 1 and are movably placed on both sides of the support 19 of the conduit 1 and that roll on the outer peripheral surface of the conduit 1 at both ends of the carrier 16.
Are rotatably mounted in a radial arrangement.

In the inner magnet device 2 of the driving member 3 moving in the conduit 1, the flexible shaft 70 is made of a synthetic resin tube such as a nylon tube or a urethane tube. After being inserted into the shaft hole 10, a screw 21 is screwed into the shaft hole 10 from the outside of the guide member 9, and the flexible shaft 70 is expanded by the screw 21, and is pressed and fixed to the inner wall of the shaft hole 10. And connected to the guide member 9.

That is, as shown in FIG. 2, the shaft hole 10 of the guide member 9 is formed with a screw portion 22 on the inner peripheral surface on one end side, and the flexible shaft 70 is formed on the inner side of the screw portion 22. A thickened portion 23 is formed in which the thick portion expands and escapes. Further, a hole 24 having substantially the same diameter as the diameter of the flexible shaft 70 is formed on the other end side continuously with the thickened portion 23. Do it.

It should be noted that the flexible shaft 70 may be a synthetic resin tube made of a single or composite material, in addition to a synthetic resin tube made of nylon or urethane. Inner / outer double tube structure made of the following materials.

The screw 21 is, as shown in FIG.
Screw part 25 screwed into the screw part 22 of 0, and the screw part 2
5, a press-in portion 26 having a diameter larger than the inner diameter of the flexible shaft 70 and being press-fitted into the end thereof, and a diameter formed continuously with the press-in portion 26 and smaller than the inner diameter of the flexible shaft 70. And a guide screw 27 having a multi-stage screw. A hexagonal hole 28 for inserting a wrench and turning is formed in the screw head.

Therefore, as shown in FIG.
0 is inserted into the axial hole 10 of the guide member 9 and the screw 21 is screwed into the axial hole 10 from outside the guide member 9 in a state where the end has entered the enlarged diameter hole 23. First, the guide portion 27 enters the inner peripheral side of the end portion of the flexible shaft 70, and then the push-in portion 26 enters the end portion of the flexible shaft 70 while expanding the diameter thereof and compresses the expanded shaft portion 23. At the same time, the step 29 formed by the press-in section 26 and the guide section 27 causes the flexible shaft 70 to abut on the step 30 of the enlarged-diameter hole 23 and the hole 24,
The end of the flexible shaft 70 is irremovably connected to the guide member 9.

Thus, the flexible shaft 70 and the guide member 9 are
It is connected without using any conventional spring pin, and furthermore, the flexible shaft 70 is pressed by the step portion 29 and the step portion 30, whereby the hollow interior of the flexible shaft 70 is hermetically sealed, The flexible shaft 70 can hold the inner magnet device 2 with the same strength as the conventional flexible shaft 7 without any trouble.

Thus, the flexible shaft 70 and the guide member 9 are formed by expanding the end of the flexible shaft 70 inserted in the shaft hole 10 of the guide member 9 in the shaft hole 10. Since it is connected by the screw 21 that presses against the inner wall of the flexible shaft 70, there is no need to perform any processing on the flexible shaft 70, and there is no place to concentrate the stress, so that the toughness of the synthetic resin is not impaired. Thus, the driving member 3 of the fluid pressure transfer device that does not break can be obtained.

[0023]

According to the present invention described above, a flexible shaft made of a tube made of a synthetic resin such as nylon or urethane tube is inserted into the shaft hole of the guide member, and its end is expanded with a screw. Since the flexible shaft is fixed by pressing against the inner wall surface of the shaft hole, it is possible to eliminate an assembly structure that causes stress concentration on the flexible shaft and causes breakage, thereby improving the durability of the flexible shaft. .

Further, by screwing the screw into the shaft hole of the guide member, the flexible shaft and the guide member can be connected.
The necessity of using a conventional hammer at the time of assembling is eliminated, and thereby, it is not necessary to damage the hammer to scratch the guide member or the like.

In addition, a flexible shaft can be obtained by cutting the nylon or urethane tube to a required length, which eliminates the necessity of forming a hole through which a spring pin is to be inserted with high precision as in the conventional case. In addition, the cost of the flexible shaft can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view showing an embodiment of the present invention.

FIG. 2 is a partial half cross-sectional side view of FIG. 1;

FIG. 3 is a partial side view of FIG. 1;

FIG. 4 is a sectional side view showing an essential part of the present invention.

FIG. 5 is a sectional side view of a conventional example.

FIG. 6 is a front view of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Conduit 2 ... Inner magnet apparatus 3 ... Driving member 4 ... Outer magnet apparatus 5 ... Follower member 6 ... Magnet 9 ... Guide member 10 ... Shaft core hole 21 ... Screw 22, 25 ... Screw part 23 ... Large diameter hole part 26 ... Push-in part 27 ... Guide part 29,30 ... Step part 70 ... Flexible shaft

Claims (4)

[Claims] A driving member having an inner magnet device moved by a pressure fluid in a conduit made of a non-magnetic material,
A driven member having an outer magnet device corresponding to the inner magnet device of the driving member is slidably provided on the outside of the conduit, and the driven member is provided with a device for supporting a conveyed object. In the transfer device in which each magnet of the magnet device is supported by a flexible shaft, the flexible shaft is made of a synthetic resin tube, and both ends of the shaft member are formed by a pair of guide members that sandwich the inner magnet device. And a screw is screwed into the shaft hole from the outside to expand the synthetic resin tube body, and is pressed against the inner wall surface of the shaft hole to be fixed undetachably. A drive member of the fluid pressure transfer device. 2. The driving member for a fluid pressure transfer device according to claim 1, wherein the synthetic resin tube is a nylon tube. 3. The fluid pressure according to claim 1, wherein the shaft hole has a hole having the same inner diameter as the outer diameter of the flexible shaft, an enlarged hole having a diameter larger than that, and a screw portion. Driving member of the transport device. 4. The screw is formed such that a guide portion having an outer diameter smaller than the inner diameter of the flexible shaft and a pushing portion larger than the inner diameter of the flexible shaft are integrally formed with a step portion interposed therebetween. The drive member for a fluid pressure transfer device according to claim 1, further comprising a screw portion screwed with the screw portion of the hole.