JPS61290283A - Control valve regulating valve - Google Patents

Abstract

PURPOSE:To provide a control valve regulating device which enables remote control of a control valve and enables automatic control of a whole system employing the control valve, by a method wherein the screw body of the control valve is so formed as to be electrically regulatable. CONSTITUTION:A spline shaft 92 is so formed as to be slidable in the longitudinal direction of a spline hole 100. Besides, since a screw body 90 secured to the spline shaft 92 is screwed in a screw hole 95 of a pressure reducing valve 32, the screw body 90 is raised to an elevated level along with rotation of the spline shaft 92. Namely, the rotation force of a motor 258 is transmitted to the screw body 90 through a rotation force transmitting mechanism formed with a worm gear and a spline joint, consisting of a spline hole 100 and the spline shaft 92, and the screw body 90 is threadedly rotated and displaced from the pressure reducing valve 32. Threaded rotation motion is effected by means of an electric signal inputted to the motor 258, and this enables electric remote control of the pressure reducing valve 32 with which a control valve 50 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control valve regulating device, and more particularly, to a control valve regulating device for regulating pressure or flow on the downstream side of a control valve. The present invention relates to a control valve adjusting device configured to perform adjustment by electrical operation.

With the wide spread of fluid equipment, various adjustment mechanisms have been incorporated into fluid control systems. For example, in a printing press, a fluid device is also incorporated into a device for feeding paper, and is suitably used to adjust the tension of paper used for printing.

That is, in a paper feeding device of a printing press, a paper feeding tension control mechanism as illustrated in FIG. 1 is used. In this paper feed tension control mechanism, the paper 4 wound around the shaft 2 reaches the tension adjustment roller 8 via the guide roller 6, and is further fed out in the direction of the arrow via the guide roller 10, and is supplied for printing. be done. In this case, the tension adjusting roller 8 is rotatably attached to a piston rod 16 fixed to a piston 14, and the piston 14 is slidable within the cylinder 18. A chamber 20 partitioned by the piston 14 within the cylinder 18 communicates with a passage 22, and one end of the passage 22 is connected to an air pressure source 24. Therefore, two passages 26 and 28 are provided that branch from the middle of the passage 22, a relief valve 30 is connected to one end of the passage 26, and a pressure reducing valve 32 is interposed in the passage 28.

Further, a cock 36 is connected to the pressure reducing valve 32 via a passage 34, and a pressure gauge 4 is connected to the cock 36 via a passage 38.
0 is connected. Note that the pilot pipe line 42 of the relief valve 30 is connected to the passage 34.

In such a configuration, air supplied from an air pressure source 24 is introduced into the chamber 20 through the passage 22 and tensions the paper 4 by sliding the piston 14 in the direction of arrow C.

Therefore, the tension of the paper 4 is controlled by adjusting the pressure of the air sliding on the piston 14. In this case, the relief valve 30
is opened by the differential pressure between the pilot pipe 42 and the passage 26, and by adjusting the pressure reducing valve 32, the pressure in the biloft pipe 42 can be arbitrarily set. That is, the pressure for opening the relief valve 30 is set by the pressure reducing valve 32.

Therefore, when the pressure of the air supplied from the air pressure source 24 reaches the set value and the relief valve 30 is opened and the air in the passage 26 is sent out to the outside, the air pressure in the passage 22) and the chamber 20 decreases, The pressing force on the piston 14 in the direction of arrow C is reduced. Therefore, the tension adjusting roller 8 is displaced in the direction of arrow B, and the tension on the paper 4 is weakened. In this way, when setting the air pressure in the passage 34 to control the tension of the paper 4, the cock 36 is essentially opened to communicate the passage 34 and the passage 3, and the pressure displayed on the pressure gauge 40 is adjusted. The pressure reducing valve 32 must be operated while checking the following.

FIG. 2 shows a conventional mechanism for adjusting the pressure of the pressure reducing valve 32 to be operated.

In FIG. 2, the pressure reducing valve 32 has a primary boat 43 and a secondary boat 44 that communicate with a predetermined pressure reducing valve mechanism built into its body. Note that the passage 28 is connected to the secondary boat 43, and the passage 3 is connected to the secondary boat 44.
4 is connected. Further, in order to arbitrarily set the secondary side pressure of the pressure reducing valve 32, a pressure setting screw 48 including a knob 46 is screwed into the body of the pressure reducing valve 32. That is, by rotating the knob 46 with the operator's hand, the screw 48 is moved forward and backward, and the elastic force of a coil spring (not shown) inside the pressure reducing valve 32 is adjusted by the forward and backward movement of the screw 48. It is configured so that the side pressure can be set freely.

In a printing press having the paper feed tension control mechanism as described above, the operator operates the printing machine while checking the printing condition at a predetermined position, and also uses the pressure gauge 4 when adjusting the tension of the paper 4.
The air pressure in the passageway 34 must be set by turning the knob 46 while visually observing 0.

Therefore, when the tension of the coil 4 has to be adjusted frequently, the operation of the pressure reducing valve 32 is extremely troublesome. Moreover, the operator is always restricted to the position where the pressure reducing valve can be seen, and on the other hand, adjusting the pressure of the pressure reducing valve itself requires a considerable amount of experience in relation to the paper feeding tension, resulting in the inconvenience of requiring a skilled operator. It had been. Furthermore, the pressure reducing valve 32
Since the paper feed tension control mechanism cannot be electrically operated, the paper feeding tension control mechanism cannot be automatically controlled.

The present invention has been made in order to eliminate the above-mentioned disadvantages, and is configured so that the pressure adjustment screw body of the control valve that adjusts the pressure or flow rate is electrically rotated via a motor, It is an object of the present invention to provide a control valve adjusting device that can be remotely controlled and is suitable for electrical control by providing a position detection device that detects the rotation angle of the screw body.

In order to achieve the above object, the present invention provides a foil shaft in which a spline is formed at one end of a screw body that adjusts the pressure or flow rate of pressure fluid flowing into a valve body, and the spline has a spline hole in which the spline engages. A worm wheel is fitted onto the worm wheel, and a worm connected to a rotational drive source is engaged with the wormwheel, and the worm and the wormwheel are rotated under the biasing action of the rotational drive source to interlock the wheel shaft. The screw body is deflected through a spline by rotation of the wheel shaft, so that the tip of the screw body engages with the valve body to adjust the pressure or flow rate of the pressure fluid.

Next, preferred embodiments of the control valve adjusting device according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 3, reference numeral 50 indicates a control valve incorporated in the paper feed tension control mechanism in place of the pressure reducing valve 32 in FIG. be done. The fixing member 56 is made of a vertically bent plate and includes a first plate portion 58 and a second plate portion 60. The first plate portion 58 has holes 62a to 6.
2d, and bolts (not shown) are inserted into these holes 62a to 62d to fix the fixing member 56. On the other hand, a recess 64 defining an inverted U-shaped side wall is formed in the second plate-like portion 60 , a hole 66 is formed in communication with the recess 64 , and a hole 66 is formed in the second plate-like portion 60 . Holes 7Qa and 70b are bored above and below the hole 66, respectively. Further, holes 72a to 72d are formed on both sides of the recess 64, and a hole 74 is formed above the recess 64.

Next, holes 78a and 78b are bored in the body of the pressure reducing valve 32, bottles 80a and 80b are fitted into the holes 73a and 78b, and the threaded portion 82 of the pressure reducing valve 32 is passed through the hole 66 of the fixing member 56. At the same time, the bottles 80a and 80b are inserted into the hole 70a.
, 70b. By inserting the bottles 80a and 80b in this manner, rotation of the body of the pressure reducing valve 32 is prevented. Next, the nut 84 is screwed onto the threaded portion 82 of the pressure reducing valve 32, and a spacer 88 having a U-shaped notch is inserted.
is pressed and fixed between the flange portion 86 of the nut 84 and the fixing member 56. In this way, the pressure reducing valve 32 is fixed to the fixing member 56.

An adjustment screw 90 for setting the secondary pressure of the pressure reducing valve 32 includes a spline shaft 92 at one end, and the spline shaft 92 has a plurality of parallel spline grooves carved on its outer circumferential surface. It has 94.

Then, the screw body 90 is screwed into the screw hole 95 of the pressure reducing valve 32.

The substantially cylindrical wheel shaft 98 has the spline groove 9
spline hole 1 so that 4 meshes with each other and slides in the axial direction.
00 is engraved, and a flange portion 102 is formed on the outer peripheral surface of the wheel shaft 98. A worm wheel 106 is fitted onto the wheel shaft 98 so as to come into contact with the flange portion 102, and the wheel shaft 98 and the worm wheel 106
are integrated via the key 104. Next, the rolling bearing 110 is fitted onto the wheel shaft 98 via the snap ring 112. A rolling bearing 114 is fitted into the other part of the wheel shaft 98 in contact with the flange portion 102, and a snap ring 116 is fitted into a circumferential groove near the other end of the wheel shaft 98.
It should be configured to prevent the departure of 4.

On the other hand, an adapter 120 for connecting a potentiometer 166, which will be described later, to the foil shaft 98 is made up of a plurality of parallel spline grooves 122 and a cylindrical columnar part. The center part of the adapter 120 has a hole 126 penetrating in its axial direction.
is bored, and an internally threaded threaded portion 128 is cut extending from one end of the hole 126 (see FIG. 4). Further, a screw hole 130 is bored from the circumferential surface of the columnar portion so as to communicate with the hole 126, and a screw 132 is screwed into the screw portion 128 of the hole 126 so that the screw 132 projects from the screw portion 128. . Then, the spline groove 122 of the adapter 120 is fitted into the spline hole 100 to integrate the adapter 120 and the wheel shaft 98.

Next, the wheel shaft 98 is fitted onto the spline shaft 92. That is, the spline shaft 92 and the spline hole 100 of the wheel shaft 98 constitute a spline joint.

Next, the rolling bearing 11 that holds the wheel shaft 98
0.114 fits into semicircular recesses 138 and 142 cut into the block member 136. In this case, the recess 138
A recess 140 is formed between and 142. This recess 14
A worm wheel 106 is loosely fitted into the hole. Screw holes 150a and 150b are bored in the side surface of the block member 136,
Furthermore, a hole 1 passing through the block member 136 in the vertical direction
52a and 152b are bored. Next, the screws 153a to 153d are inserted into the holes 72a to 72d of the fixing member 56 to form screw holes (not shown) drilled in the block member 136.
The block member 136 and the fixing member 56 are integrated by screwing into the fixing member 56.

The holding member 154 is bent in an oval shape, and a hole 158 is bored in its vertical plate-like portion. Additionally, holes 160a and 160b are formed that pass through the holding member 154 in the horizontal direction, and screws 162a are inserted into these holes 160a and 160b.

162b into the screw hole 150a of the block member 136.
, 150b, the holding member 154 is fixed to the block member 136.

A threaded portion 168 is protruded from the body of the potentiometer 166, and a shaft 170 having a recessed portion 172 is formed to pass through the threaded portion 168 from inside the body of the potentiometer 166. The potentiometer 166 is a resistance type converter that converts the rotation angle of the shaft 170 into an electrical quantity, and an electric signal corresponding to the rotation angle of the shaft 170 is outputted via a lead wire (not shown). Therefore, the potentiometer 166 is fixed to the holding member 154 by inserting the shaft 170 into the hole 158 of the holding member 154 and the nut 174, and screwing the nut 174 onto the threaded portion 168.

At that time, the shaft 170 is inserted into the hole 126 of the adapter 120.

Next, a screw 176 is screwed into the screw hole 130 of the adapter 120, and the tip of the screw 176 is brought into contact with the recess 172 of the shaft 170 to integrate the shaft 170 and the adapter 120. That is, the shaft 170 is configured to rotate together with the screw body 90.

A substantially semi-cylindrical recess is formed on the lower surface of the block member 178 so as to engage with the block member 136 to define a substantially cylindrical space. A recess 1 into which an outer ring of a rolling bearing 114 is fitted into a peripheral surface defining this approximately semi-cylindrical recess.
84 and a part of the worm wheel 106 are cut into a recessed portion to form a peripheral surface portion 188 that abuts the rolling bearing 110 (see FIG. 4).
Holes 190, 192, 194, and 196 are formed in the holes 190, 192, 194, and 196 so as to communicate with each other in the horizontal direction and gradually decrease in diameter, so that a part of a deceleration device 260, which will be described later, can be fitted into the opening of the hole 196. (See Figure 5). In this case, the hole 192 communicates with the substantially semi-cylindrical recess, and a hole 198 is formed in communication with the hole 194 from the upper surface of the block member 178. The block member 178 has a screw hole 200 on the lower surface.
a and 200b, and a screw hole 202 in the side surface. Incidentally, screw holes 206a to 206d for fixing the speed reducer 260 are bored in the surface defining the opening of the hole 196.

On the other hand, the worm shaft 212 has a hole 2 at one end thereof.
14 is bored, and a screw hole 216 is bored in communication with the hole 214 from the peripheral surface. The other end of the worm shaft 212 is provided with a screw hole 22Q (see Fig. 5), and a flange portion 2 is provided on the peripheral surface.
22 is formed. Then, the worm shaft 212 and the worm 224 are fitted together via the key 225.

Next, from one end of the worm shaft 212 to the rolling bearing 22
6 is fitted onto the outside, and the inner ring of the rolling bearing 226 is fixed via the snap ring 228. A rolling bearing 230 is fitted to the other end of the worm shaft 212, and a bolt 232 is inserted through a washer 234 and screwed into the screw hole 220. At that time, the inner ring of the rolling bearing 230 is connected to the flange portion 222 and the washer 234.
It is held between In this way, the worm shaft 212 with the worm 224 etc. attached is inserted through the hole 190 of the block member 17B, the rolling bearing 226 is fitted into the hole 194, and the rolling bearing 230 is inserted into the hole 190.
It is locked at the stepped part that is the boundary between the two.

The pressing member 238 consists of a plate-shaped part and a cylindrical part protruding from the plate-shaped part, and a hole 242 is bored through the plate-shaped part from a space inside the cylindrical part. Next, screws 244a to 24
4d is inserted into a hole drilled in the pressing member 238 and screwed into a screw hole (not shown) in the block member 178, thereby fixing the pressing member 238 to the block member 178. At this time, the cylindrical portion of the pressing member 238 presses and fixes the outer ring of the rolling bearing 230.

Next, the block member 178 is placed on the block member 136, and the screws 250a, 250b are inserted into the holes 152a, 152.
screw holes 200a, 200 of block member 178 through b
At the same time, the screw 252 is inserted into the hole 74 and screwed into the screw hole 202 of the block member 178. As a result, the block member 178 is fixed, and the worm 224 meshes with the worm wheel 106 to form a worm gear. Then, the spline shaft 92 and the spline hole 10
A rotational force transmission mechanism is constituted by a spline joint consisting of 0 and the worm gear.

Next, the rotational drive 'a2 connected to the rotational force transmission mechanism
56 will be explained. The rotational drive source 256 includes a motor 258;
It consists of a reduction gear 260 integrated with this motor 258 and a friction clutch 262 connected to the reduction gear 260. In this case, the rotational force of the motor 258 is
The rotational speed is adjusted by 60 and then transmitted to shaft 266 via shaft 264 and friction clutch 262. A recess 268 is cut into the shaft 266.

Therefore, the shaft 266 is inserted into the hole 214 of the worm shaft 212, and the screw 272 is passed through the screw hole 216 of the worm shaft 212 so that its tip abuts against the recess 268 of the shaft 266. Thereby, the worm shaft 212 and the shaft 266 are integrated, and the rotational force of the motor 258 can be transmitted to the worm 224. Note that the rotational drive source 256 is fixed to the block member 178 by inserting the screws 274a to 274d into holes provided in the speed reduction device 260 and screwing them into the screw holes 206a to 206d of the block member 178.

The control valve 50 is constructed as described above, and is incorporated into a paper feeding tension control mechanism in place of the pressure reducing valve 32 shown in FIG. 1, as shown in FIG. That is, the passage 28 is connected to the primary side boat 43 defined in the pressure reducing valve 32 of the control valve 50, and the passage 34 is connected to the secondary side port 44. Further, a pressure switch 278 is connected to the passage 22 via a pilot line 276.

The four-control valve adjusting device according to the present invention is basically constructed as described above, and its operation and effects will be explained next.

In the paper feeding tension control mechanism shown in FIG. 6, when adjusting the air pressure in the passage 34 to set the tension of the paper 4, the control valve 5
A predetermined electric signal is input to the motor 258 of No. 0 through a lead wire (not shown), and the motor 258 is rotated. The rotational force is transmitted to the reduction gear 260, the shaft 264, and the friction clutch 262.
) is transmitted to the worm shaft 212 via the shaft 266, the worm shaft 212 rotates, and the worm 224 integrated with the worm shaft 212 rotates. Correspondingly, the worm wheel 106 rotates, and as a result, the wheel shaft 98 rotates. At this time, since the spline shaft 92 is engaged with the spline hole 100 formed in the wheel shaft 98, the spline shaft 92 rotates together with the worm wheel 106. In this case, the spline shaft 92 is configured to be slidable in the longitudinal direction of the spline hole 100,
Furthermore, since the screw body 90 fixed to the spline shaft 92 is screwed into the screw hole 95 of the pressure reducing valve 32, the screw body 90 is displaced as the spline shaft 92 rotates. That is, the rotational force of the motor 258 is transmitted to the screw body 9 through a rotational force transmission mechanism constituted by a worm gear and a spline joint consisting of a spline hole 100 and a spline shaft 92.
0, the screw body 90 turns, and the pressure reducing valve 3
This results in a displacement with respect to 2.

By the way, the secondary side pressure of the pressure reducing valve 32 is originally configured to be set by turning a screw 48 (see FIG. 2), and the control valve 50 uses a screw body instead of the screw 48. 90 is adopted. Therefore, the screw body 90
The secondary side pressure of the pressure reducing valve 32, that is, the air pressure in the passage 34, is adjusted by the screwing operation, and the screwing operation is performed by an electric signal input to the motor 258.

Therefore, electrical remote control of the pressure reducing valve 32 that constitutes the control valve 50 becomes possible.

In the control valve 50, the spline shaft 92 reciprocates as the screw body 90 turns, and the spline shaft 92 abuts the nut 84 or the screw 132 at both ends of the reciprocating movement. Therefore, if the rotation transmission capacity of the friction clutch 262 is appropriately selected, when the spline shaft 92 comes into contact with the napht 84 or the screw 132 due to an erroneous operation of the motor 258, the clutch plate (not shown) inside the friction clutch 262 The motor 258 is not idly rotated and an excessive load is not applied to the motor 258. Therefore, there is no risk that the motor 258 will be burnt out due to erroneous operation. Note that the selection range of the secondary pressure of the control valve 50 can be changed by changing the thickness of the spacer 88 or the degree of protrusion of the screw 132 with respect to the adapter 120. Furthermore, if the electrical system that rotates the motor 258 is broken and it is impossible to start the motor 258, a predetermined tool can be inserted through the hole 242 drilled in the pressing member 238 to rotate the bolt 232. The secondary pressure can be adjusted by

Furthermore, the shaft 170 of the potentiometer 166 is connected to the threaded body 9.
0, the electrical signal obtained from the potentiometer 166 corresponds to the rotation angle of the screw body 90. That is, the potentiometer 166 is a means for detecting the rotation angle of the screw body 90, and detects the rotation angle of the screw body 90 and the pressure reducing valve 32.
The potentiometer 166 can also be used as a means for detecting the pressure on the outlet side if the relationship between the value and the outlet pressure is determined in advance. In the above case, the pressure gauge 40 of the paper feeding tension control mechanism becomes unnecessary. In this way, the rotation angle of the screw body 90 or the secondary pressure can be detected by the potentiometer 166, and
The outlet pressure is electrically adjustable via motor 258. Therefore, by processing the signal obtained from the potentiometer 166 and the signal input to the motor 258 using a computer or the like, it is possible to further develop the functions of the control valve 50.

Further, as shown in FIG. 6, a pressure switch 2 is provided in the passage 22.
By connecting 78, it is possible to obtain an electrical signal corresponding to the air pressure in the passage 22, and to operate the motor 258 of the control valve 50 by effectively utilizing the electrical signal.

Therefore, the tension of the girder 4 can be controlled according to the pressure of the air supplied from the air pressure source 24. In addition, the pressure switch 278
Of course, it is possible to construct a paper feeding tension control mechanism similar to that described above by incorporating a known pressure transducer instead of the above.

On the other hand, when constructing the control valve 50 using the pressure reducing valve 32, which was originally manually operated, the work on the conventional pressure reducing valve 32 is basically only changing the screw 4B and fixing it to the fixing member 56. It is. That is, there is no need to perform complicated processing on the conventional pressure reducing valve 32. Therefore, if the adjustment means for the control valve is based on the spiral movement of a screw, it is possible to incorporate this control valve.

As explained above, according to the present invention, it is possible to electrically adjust the screw body that replaces the screw of the control valve that has conventionally been manually screwed, and the control valve can be remotely operated.
Furthermore, an effect can be obtained that the entire system using the control valve can be developed to perform actuation control.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments, and various improvements and changes in design can be made without departing from the gist of the present invention. Of course.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of a paper feeding tension control mechanism in a paper feeding device of a printing press, and FIG. 2 is a side view of a pressure reducing valve according to the prior art.
FIG. 3 is an exploded perspective view of a control valve adjusting device according to the present invention, and FIG. 4 is a schematic cross-sectional side view of the control valve adjusting device according to the present invention.
FIG. 5 is a schematic cross-sectional front view of the control valve adjusting device according to the present invention, and FIG. 6 is a schematic explanatory diagram when the control valve adjusting device of the present invention is incorporated into the paper feeding tension control mechanism shown in FIG. 1. . 32...Pressure reducing valve 48...Screw 50...Control valve 90...Screw body 92...Spline shaft 98...Wheel shaft 100...Spline hole 1
06... Worm foil 120... Adapter 136...
- Block member 154... Holding member 166... Potentiometer 170... Shaft 178... Block member 212... Worm shaft 224... Worm 238... Pressing member 242... Hole 256... Rotation drive source
258...Motor 260...Reduction device 262
・・Friction clutch 264.266・・Shaft

Claims (3)

[Claims] (1) A spline is formed at one end of the screw body that adjusts the pressure or flow rate of the pressure fluid flowing into the valve body, a worm foil is fitted onto a wheel shaft having a spline hole in which the spline engages, and the worm A worm connected to a rotational drive source is engaged with the wheel, the worm and the worm wheel are rotated under the biasing action of the rotational drive source to interlock the wheel shaft, and the rotation of the wheel shaft causes the screw body to be splined. A control valve adjusting device characterized in that the pressure or flow rate of the pressure fluid is adjusted by engaging the tip of the screw body with the valve body by deflecting the screw body through the valve body. (2) In the device according to claim 1, the control is configured such that the spline groove of the adapter is engaged with the spline hole, and a position detector is connected to the adapter to detect the rotation angle of the screw body. Valve adjustment device. (3) The control valve adjusting device according to claim 2, wherein the position detector is a potentiometer.