JP3051409B1 - Reciprocating drive for shower pipe - Google Patents

Abstract

An object of the present invention is to effectively prevent damage due to pressure fluctuation of an oil seal of a motor during operation of a reciprocating drive device for a shower pipe. A sliding cylinder (8) inserted in the outer cylinder (12) is reciprocated in an axial direction by a rotary drive of a motor (4) attached to a rear end of the outer cylinder (12) through a reciprocating conversion mechanism (5). In the reciprocating drive device 3 of the shower pipe 1 configured to reciprocate the shower pipe 1 connected to the moving cylinder 8 in the axial direction, the inside of the rear part of the outer cylinder 12 accompanying the backward movement (retreat) of the sliding cylinder 8 is described. A reciprocating drive device for a shower pipe in which an internal pressure relief valve 31 which is opened by the internal pressure when the pressure increases is provided at a rear portion of the outer cylinder 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating drive device for a shower pipe used for washing a paper band or the like in papermaking, and more particularly, to an improvement on internal pressure fluctuation and liquid pressure fluctuation in a reciprocating drive unit due to reciprocal driving.

[0002]

2. Description of the Related Art A reciprocating drive 1 shown in FIG.
A cylindrical holder 4 'holding a slide 5 is attached to a flange 4 at a rear end of a slide cylinder 3 forming a reciprocation conversion mechanism 2, and the slide 5 is attached to the drive shaft 6' of a motor 6 by rotation. The sliding cylinder 3 slides along the spiral groove 8 of the screw shaft 7.
Is reciprocally driven in the axial direction, and the shower pipe 10 is reciprocated in the axial direction via the connecting arm 9 attached to the front end of the sliding cylinder 3.

The sliding cylinder 3 is inserted into the outer cylinder 11 and its front end is supported by the outer cylinder 11, and the rear end of the screw shaft 7 is supported by the bearing 12 while the motor is mounted on the screw shaft 7. The drive shaft 6 'is directly connected.

Further, a lubricating oil injection hole 13 is provided in the outer cylinder 11.
And discharge holes 14 are provided, and bolts 15 and 16 are screwed into female screws formed on the hole walls of the holes 13 and 14, respectively, to close the injection holes 13 and the discharge holes 14, respectively. The bolt 15 is removed, and lubricating oil is injected from the injection hole 13 into the outer cylinder 11, whereby the friction and friction heat generated in the reciprocating mechanism and the bearing are absorbed and reduced by the lubricating oil.

[0005]

However, in the above-mentioned reciprocating drive device, the outer cylinder 11 is formed by the flange 4 and the cylindrical holder 4 'on which the slide 5 is attached to the rear end of the sliding cylinder 3.
Since the inside is divided into a front inner space 11a and a rear inner space 11b, the inner pressure is increased by compressing the rear inner space 11b or the front inner space 11a when the sliding cylinder 3 moves backward or forward. In particular, when the vehicle retreats, a pressure is applied to the oil seal of the motor due to the pressure increase in the rear inner chamber 11b, thereby causing a problem that the seal is damaged. As a result, the sealing function is impaired and lubricating oil flows into the motor, often causing motor damage.

Further, since the lubricating oil is injected into the outer cylinder depending on the operator's intuition, the lubricating oil may be excessively supplied, and this excessive lubricating oil may cause the hydraulic pressure in the rear inner space when the sliding cylinder is retracted. Similarly, this hydraulic pressure is applied to the oil seal of the motor, causing seal damage, causing lubricating oil to flow into the motor and damaging the motor.

[0007]

SUMMARY OF THE INVENTION The present invention provides a reciprocating drive device for a shower pipe which appropriately solves the above-mentioned problems. As means therefor, in the reciprocating drive device, when the internal pressure at the rear of the outer cylinder rises with the reciprocation (retreat) of the sliding cylinder, the internal pressure relief valve which is opened by the internal pressure is connected to the outer cylinder. At the rear of the motor to prevent motor damage due to the rise in internal pressure.

In the present invention, a lubricating oil relief valve which is opened by the hydraulic pressure of the excess lubricating oil which is increased in accordance with the backward movement (retreat) of the sliding cylinder and which allows the excessive lubricating oil to flow out is provided at the rear of the outer cylinder. In this configuration, the motor is effectively prevented from being damaged due to an increase in hydraulic pressure due to the injection of the excessive lubricating oil.

Similarly, a lubricating oil relief valve is opened at the front of the outer cylinder, which is opened by the hydraulic pressure of the excessive lubricating oil which is increased with the forward movement (forward movement) of the sliding cylinder and allows the excessive lubricating oil to flow out. The above object has been achieved.

[0010]

FIG. 1 shows an embodiment of the present invention.
5 will be described in detail. Note that the reference numerals will be described irrespective of the conventional example shown in FIG.

As shown in FIGS. 1 and 2, reference numeral 1 denotes a shower pipe used for cleaning a papermaking strip or the like. The shower pipe 1 is provided, for example, in the widthwise direction of the papermaking strip, and both ends are supported by bearings 2. The pipe is supported so that it can reciprocate in the width direction.
A large number of washing water injection nozzles are arranged at intervals in a portion extending between the bearings 2 at both ends.

The reciprocating drive unit 3 includes a motor 4 and a reciprocating conversion mechanism 5 for converting the rotational drive of the motor 4 to reciprocal drive. 1 and is supported by the one bearing 2 together with one end of the shower pipe 1.

As shown in FIGS. 3 and 4, the reciprocating motion converting mechanism 5 inserts a screw shaft 7 having a spiral groove 6 on its outer peripheral surface into a sliding cylinder 8 and a rear end of the sliding cylinder 8. A cylindrical holder 9 ′ holding a slide 10 is attached to the flange 9, and the slide 10 slides along the spiral groove 6 of the screw shaft 7 with the rotation of the drive shaft 4 ′ of the motor 4. Is reciprocated in the axial direction, and the shower pipe 1 is reciprocated in the axial direction via the connecting arm 11 connecting the front end of the sliding cylinder 8 and the shower pipe 1.

The sliding cylinder 8 is an outer cylinder 1 forming a main body of the apparatus.
2, the front end of the sliding cylinder 8 is supported on the front end of the outer cylinder 12 via a sealing material, and the rear end of the screw shaft 7 is supported on a bearing cylinder 15 via a bearing 14. ing.

As shown in FIG. 4, the motor 4 has a motor shaft 4 'disposed at the rear end of the outer cylinder 12 on the same axis as the screw shaft 7, and the bearing cylinder 15 attached to the rear end of the outer cylinder 12.
The mounting seat 23 provided on the motor 4 is closed to the mounting seat 16 protruding from the peripheral edge of the motor 4, and the bolt 24 is tightened. An oil seal 25 is attached to a motor shaft 4 ′ of the motor 4 to prevent a later-described lubricating oil 26 from entering the motor 4.

As shown in FIG. 3, the motor 4 is arranged in an L-shape in which the motor shaft 4 'and the screw shaft 7 form a right angle, and a drive bevel gear 17 is directly attached to the shaft end of the motor shaft 4'. Bevel gear 1 driven by the shaft end of 7
8, the bevel gears 17 and 18 are engaged with each other, and the rotation of the motor shaft 4 'is transmitted to the screw shaft 7 via the bevel gears 17 and 18 and the screw shaft 7 is driven to rotate.

As shown in FIGS. 2 and 3, the bevel gears 17 and 18 are gear housing cylinders 19 fitted to the rear end of the outer cylinder 12.
And the bearing cylinder 15 is tightly fitted in the rear end cylinder opening of the gear storage cylinder 19, and the holding cap 20 is fastened to the bearing cylinder 15 with a bolt 21.

A motor mounting opening 22 is opened in the cylindrical wall of the gear housing cylinder 19, a mounting seat 23 of the motor 4 is closed in the mounting opening 22, and the motor 4 is assembled to the gear housing cylinder 19 by tightening bolts 24. wear. An oil seal 25 is attached to a motor shaft 4 'of the motor 4 so that a lubricating oil
6 is prevented from entering the motor 4.

The reciprocating drive device 3 shown in FIG. 3 maintains the meshing state of the bevel gears 17 and 18 while driving the bevel gear 17.
Is rotated (rolled) integrally with the motor 4 along the peripheral surface of the driven bevel gear 18 so that the arrangement angle of the motor 4 can be set in a stepless manner. The motor 4 is rotated and installed at an angle.

As shown in FIGS. 2 to 4, the outer cylinder 12 and the gear accommodating cylinder 19 forming the reciprocating drive device 3 include:
When the device 3 is in operation, lubricating oil 26 for absorbing and mitigating friction and frictional heat generated by bearings and gear mechanisms in the device 3 is injected, and the injection hole 27 for injecting the lubricating oil 26 is inserted into the outer cylinder 12 or the gear. It is provided in the housing cylinder 19. A female screw is formed on the hole wall of the injection hole 27, and a bolt 28 is screwed to the female screw via a sealing material to close the injection hole 27.

The inside of the outer cylinder 12 is located forward of the outer cylinder 12 with the flange 9 and the cylindrical holder 9 'as a boundary.
2a, and a rear inner chamber 12b is formed at the rear, and the gas or excess lubricating oil 26 in the front inner chamber 12a is compressed by the forward movement of the sliding cylinder 8, and the rear inner chamber is formed by the retreat. The gas or excess lubricating oil 26 in the chamber 12b is compressed, and the reciprocating movement of the sliding cylinder 8 alternately repeats the compression in the front inner space 12a and the rear inner space 12b.

The applicant has found that this phenomenon causes the oil seal 25 of the motor 4 to be broken, and thus the motor 4 to be damaged. Therefore, the present invention provides a means for solving this problem in the reciprocating drive device 3 described above.
When the internal pressure of the rear inner space 12b of the outer cylinder 12 rises with the reciprocation (retreat) of the sliding cylinder 8, the internal pressure relief valve 31 which is opened by the internal pressure is connected to the outer cylinder 12. It is provided at the rear to prevent motor damage due to the rise in internal pressure.

That is, in FIG. 3, when the sliding cylinder 8 is retracted, the internal pressure in the gear accommodating chamber 19a, which is the rear inner vacant chamber, rises, and the internal pressure relief valve 31 which is constantly urged to be closed by this pressure increase is released. Open automatically to release the internal pressure to the outside.

In FIG. 4, when the sliding cylinder 8 is retracted, the internal air pressure in the rear inner chamber 12b rises, and the internal pressure relief valve 31 which is constantly urged to be closed by this pressure increase is automatically opened. Release atmospheric pressure to the outside.

In the present invention, the lubricating oil relief valve 3 which is opened by the hydraulic pressure of the excessive lubricating oil 26 which is increased in pressure with the reciprocation (retreat) of the sliding cylinder 8 causes the excessive lubricating oil 26 to flow out.
1 is provided at a rear portion of the outer cylinder 12 so as to effectively prevent motor damage due to an increase in hydraulic pressure due to the injection of excessive lubricating oil.

That is, in FIG. 3, when the sliding cylinder 8 is retracted, the excess lubricating oil 26 in the gear accommodating chamber 19a, which is the rear inner space, is obtained.
The lubricating oil relief valve 31, which is constantly urged to be in a closed state, is automatically opened by this pressurization to release the excess lubricating oil 26 to the outside.

In FIG. 4, when the sliding cylinder 8 is retracted, the excess lubricating oil 26 in the rear inner chamber 12b is compressed to increase the pressure, and the increased pressure causes the lubricating oil relief valve 31 constantly urged to be closed. It opens automatically and the excess lubricating oil 26 escapes to the outside.

In the present invention, as a countermeasure against the excessive lubricating oil, the sliding cylinder 8 is opened by the hydraulic pressure of the excessive lubricating oil 26 which is increased with the forward movement (forward movement) of the sliding cylinder 8, and the excessive lubricating oil 26 flows out. A lubricating oil relief valve 31 is provided at the front of the outer cylinder 12 to achieve the above object.

That is, in FIGS. 3 and 4, when the sliding cylinder 8 moves forward, the excess lubricating oil 26 in the front inner chamber 12a is compressed and pressurized, and the pressurized lubricating oil is constantly urged to the closed state. An example is also shown in which the relief valve 31 is automatically opened to release the excess lubricating oil 26 outward.

As described above, the present invention provides a concept of using the relief valve 31 as a means for releasing the internal air pressure and a concept of using the relief valve 31 as a means for releasing the excessive lubricating oil.

A specific example of the internal pressure relief valve 31 and the lubricating oil relief valve 31 will be described below with reference to FIG.
A discharge hole 29 is formed in the peripheral wall at the front end of the outer cylinder 12 shown in FIG. 3 or the cylinder wall of the gear housing cylinder 19 at the rear of the outer cylinder 12, and a female screw 30 is formed in the hole wall of the discharge hole 29. A cylinder 33 forming the relief valve 31 is attached to the female screw 30 with a male screw 35 provided on the outer peripheral surface of the inner end.

More specifically, the relief valve 31 has a ball valve structure, for example.
The ball 32 is resiliently held by a coil spring 37 provided in a cylindrical hole 33a, and a small-diameter inflow hole 36 is provided at the inner end side of the cylindrical hole 33a. A valve seat 34 having a dish-shaped inclined surface 34 'is provided in the portion, and the ball spring 32 is pressed against the valve seat 34 while being resiliently held by the coil spring 37.

A male screw 38, which is rotatable with a tool, is screwed into the outer end of the cylindrical hole 33a.
The coil spring 37 is compressed and held between the two, and the amount of compression of the coil spring 37 is adjusted by turning the adjusting male screw 38, thereby adjusting the elasticity of the ball 32 by the coil spring 37 and opening and closing the internal pressure or the liquid pressure. Adjust the sensitivity.

An outflow hole 39 communicating with the inflow hole 36 at the inner end of the cylindrical hole 33a is provided in the inner end side wall of the cylinder 33.
The outflow hole 39 is closed by the ball 32 closing the inflow hole 36, and communicates with the inflow hole 36 by the ball 32 retracting while compressing the coil spring 37 by the internal pressure or the hydraulic pressure.

As described with reference to FIG. 3 or FIG. 4, the forward and backward movement of the sliding cylinder 8 causes the front inner cavity 12 of the outer cylinder 12 to move forward.
a or when the excess lubricating oil 26 in the rear inner space 12b is compressed and pressurized, the ball 32 retracts while compressing the coil spring 37 at the set pressure and the inflow hole 36 and the outflow hole 39
And the internal pressure or excess lubricating oil 26 is discharged. After the release, the ball 32 is automatically restored by the coil spring 37, and the inflow hole 36 is closed. This reduces the internal pressure to a steady state and removes the adverse effect on the motor 4.

The external cylinder 12 or the gear housing cylinder 19 is tightened by screwing the male screw 35 provided in the relief valve 31.
The relief valve 31 can be attached to and detached from the outer surface of the outer cylinder 12, and by removing the relief valve 31, the entire amount of the lubricating oil 26 in the outer cylinder 12 can be released and re-injected.

FIG. 6 shows that a lubricating oil injection hole 13 and a discharge hole 14 are provided at the rear end of the outer cylinder 12 so as to be opened when necessary so that lubricating oil can be injected and discharged. . The present invention adopts a configuration in which the relief valve 31 is provided at a portion where the lubricating oil discharge hole 14 is provided, and the relief valve 31 is used together with the conventional injection hole 13 to discharge and discharge the lubricating oil 31 when the lubricating oil is discharged.

In the present invention, the above-mentioned relief valve 31 is provided at a portion where the conventional lubricating oil injection hole 13 is provided so as to be shared with the conventional discharge hole 14, and the lubricating oil is injected and the relief valve 31 is removed and injected. take.

Accordingly, the intended purpose can be effectively achieved only by providing the above-described relief valve 31 in the conventional injection hole 13 or the conventional discharge hole 14 without significantly modifying the conventional reciprocating drive device of the shower pipe.

[0040]

According to the present invention, the relief valve provided at the front or rear part of the outer cylinder constituting the reciprocating drive device for the shower pipe automatically raises the internal pressure rise or the fluid pressure rise of the excess lubricating oil to the outside. The internal pressure or hydraulic pressure can be used to properly solve the problem of damaging the seal of the motor or damaging the motor. Therefore, stable operation of the reciprocating drive which requires continuous operation over time is guaranteed.

Even if the operator excessively injects the lubricating oil into the outer cylinder at the installation site of the device, the relief valve can immediately discharge the excess of the lubricating oil by the operation immediately after the injection, and the motor can be discharged to the motor. Can be eliminated beforehand.

[Brief description of the drawings]

FIG. 1 is a plan view of a shower pipe and a reciprocating drive device.

FIG. 2 is a side view of the reciprocating drive.

FIG. 3 is a sectional view showing a specific structure example of the reciprocating drive device.

FIG. 4 is a sectional view showing another specific example of the structure of the reciprocating drive device.

FIG. 5A is a sectional view of a relief valve showing a closed state,
(B) is sectional drawing of the relief valve which shows an open state.

FIG. 6 is a sectional view showing a conventional example of a reciprocating drive device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 shower pipe 2 bearing 3 reciprocating drive 4 motor 4 ′ motor shaft 5 reciprocating motion conversion mechanism 6 helical groove 7 screw shaft 8 sliding cylinder 9 flange 9 ′ cylindrical holder 10 slider 11 connecting arm 12 outer cylinder 12 a Chamber 12b Rear inner cavity 14 Bearing 15 Bearing cylinder 16 Mounting seat 17 Drive bevel gear 18 Follower bevel gear 19 Gear storage cylinder 19a Gear storage chamber 20 Holding cap 21, 24 Bolt 22 Motor mounting port 23 Mounting seat 25 Oil seal 26 Lubricating oil 27 Lubrication Oil injection hole 28 Bolt 29 Discharge hole 30 Female screw 31 Relief valve 32 Ball 33 Cylinder 33a Cylindrical hole 34 Valve seat 34 'Dish-shaped inclined surface 35 Male screw 36 Inlet hole 37 Spring 38 Adjusting male screw 39 Outlet hole

Claims (3)

(57) [Claims] 1. A rotary drive of a motor attached to a rear end of an outer cylinder is converted into a reciprocating motion in an axial direction of a sliding cylinder inserted in the outer cylinder via a reciprocating motion converting mechanism, and the sliding is performed. In a shower pipe reciprocating drive device configured to reciprocate in the axial direction a shower pipe connected to the front end of the cylinder via an arm,
An internal pressure relief valve which is opened by the internal pressure when the internal pressure at the rear of the external cylinder rises with the return (retraction) of the sliding cylinder is provided at the rear of the external cylinder. Reciprocating drive for shower pipe. 2. The rotary drive of a motor attached to the rear end of an outer cylinder filled with lubricating oil is converted into reciprocating motion in the axial direction of a sliding cylinder inserted in the outer cylinder via a reciprocating motion converting mechanism. In a shower pipe reciprocating drive device configured to reciprocate in the axial direction with a shower pipe connected to the front end of the sliding cylinder via an arm, the pressure is increased as the sliding cylinder moves backward (retreats). A reciprocating drive device for a shower pipe, wherein a lubricating oil relief valve, which is opened by hydraulic pressure of excess lubricating oil and allows the excessive lubricating oil to flow, is provided at a rear portion of the outer cylinder. 3. The rotary drive of a motor mounted on the rear end of an outer cylinder filled with lubricating oil is converted into a reciprocating motion in the axial direction of a sliding cylinder inserted in the outer cylinder via a reciprocating motion converting mechanism. In a shower pipe reciprocating drive device configured to reciprocate in the axial direction with a shower pipe connected to the front end of the sliding cylinder via an arm, the pressure is increased as the sliding cylinder moves forward (forward). A reciprocating drive device for a shower pipe, wherein a lubricating oil relief valve, which is opened by the hydraulic pressure of excess lubricating oil and allows the excessive lubricating oil to flow, is provided at the front of the outer cylinder.