JP2997009B2 - Primer coating equipment for roller tubes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention applies a primer to an inner peripheral surface of a tube arranged in a mold when a rubber roller having a tube on a surface layer is manufactured using the mold. The present invention relates to a primer coating device for a roller tube.

(Prior Art) In a copying machine or the like, a rubber roller having a tube (hereinafter referred to as a roller tube) made of fluorine resin or the like on its surface is used.

The rubber roller having such a configuration is manufactured as follows. That is, as shown in FIG. 8, a core shaft 2 is arranged on a central axis in a cylindrical mold 1 and upper and lower ends of the core shaft 2 are
It is supported and fixed by closing brackets 3 and 4. Also, mold 1
And the roller tube 5 is inserted into the mold 1 and the extra lengths 5a, 5a at both ends of the roller tube 5 are folded back on the outer peripheral surface of the mold 1 to form a rubber ring. Fix it to the mold 1 with 6 or the like. Then, a rubber roller is manufactured by injecting a liquid synthetic rubber material 7 into the mold 1 and cross-linking the same.

By the way, before injecting the synthetic rubber material 7, it is necessary to apply a primer to the inner peripheral surface of the roller tube 5 so that the roller tube 5 and the crosslinked rubber material 7 are securely adhered to each other.

Therefore, conventionally, the stick was applied to the inner peripheral surface of the roller tube by holding the mold 1 by hand, inserting the stick brush with the primer adhered into the roller tube 5, and reciprocating the brush artificially. .

Further, a primer is sprayed from one end of the mold 1 onto the inner peripheral surface of the roller tube 5 with a spray gun.

(Problems to be Solved by the Invention) However, when the stick brush is artificially operated, it is difficult to uniformly apply the primer to the inner peripheral surface of the roller tube 5, and the hair falling off from the stick brush is removed by the roller. There is a drawback that a defective rubber roller is obtained because the brush may adhere to the inner peripheral surface of the tube 5 or be scratched by the brush.

Further, simply spraying the primer on the inner peripheral surface of the roller tube 5 with a spray gun also makes it difficult to uniformly apply the primer, and the primer may collect on a part of the inner peripheral surface. However, there is a disadvantage that a defective rubber roller is obtained.

The present invention has been made in order to solve such a problem, and provides a roller tube primer applying apparatus capable of uniformly applying a primer to the inner peripheral surface of a roller tube without causing a defective rubber roller. The purpose is to do.

(Means for Solving the Problems) A roller tube primer applying apparatus of the present invention is an apparatus for applying a primer to an inner peripheral surface of a roller tube arranged in a cylindrical mold. A mold rotating mechanism having a driving roller and a driven roller for supporting and rotating the mold, a primer ejecting means for ejecting the primer from a tip ejection nozzle, and fixing the primer ejecting means. A nozzle position adjusting mechanism for positioning the injection nozzle on the central axis of the mold; and a nozzle position adjusting mechanism parallel to the central axis of the driving roller to reciprocate the injection nozzle along the central axis in the mold. A guide plate is provided on the guide plate, and guide rollers engaged with both end faces of the guide plate via a slide base connected to the nozzle position adjusting mechanism are rotatably provided. A reciprocating mechanism for moving the position adjustment mechanism.

(Operation) The mold rotating mechanism rotates while supporting the mold.

The nozzle position adjusting mechanism fixes the primer injection means and positions the injection nozzle on the center axis of the mold.

The reciprocating mechanism moves the nozzle position adjusting mechanism to reciprocate the injection nozzle in the mold along the central axis.

Accordingly, the primer can be uniformly applied to the inner peripheral surface of the roller tube by injecting the primer from the injection nozzle while reciprocating the injection nozzle in the mold and rotating the mold.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view of a primer coating apparatus according to the present invention, FIG. 2 is a front view showing a main part of the apparatus with a part cut away, and FIG. 3 is a sectional view taken along line AA of FIG. .

First, in FIG. 1, reference numeral 10 denotes a frame of the apparatus, on which a mold rotating mechanism 11 is disposed. The mold rotating mechanism 11 has a driving roller 12 and a driven roller 13, and the rollers 12, 13 are arranged in parallel at the same height with a certain interval, and the rotating shafts at both ends are a pair of rollers. Mounting plate 14,14
Is rotatably supported. These roller mounting plates 1
4 and 14 are formed in an L-shape and are fixed on the gantry 10 with bolts. An endless belt 15 is wound around one end of the driving roller 12. The endless belt 15 is guided to the lower surface side of the gantry 10 through an elongated hole 10a provided in the gantry 10,
It is wrapped around 6. This pulley 16 is geared motor 1
The geared motor 17 is fixed to a shaft 17a of the motor 7, and is bolted to the lower surface of the gantry 10 via a bracket 18. The tip of the shaft 17a of the geared motor 17 is rotatably supported by a bearing 19, and the bearing 19 is fixed to the lower surface of the gantry 10 via a mounting plate.

In the mold rotating mechanism 11 having the above configuration, the mold 1 is mounted and supported on the driving roller 12 and the driven roller 13 as shown in FIGS. 1 and 6. . Accordingly, when the geared motor 17 is driven, the driving roller 12 is rotationally driven via the pulley 16 and the endless belt 15, so that the mold 1 rotates in the opposite direction while rotating the driven roller 13.

Further, a nozzle position adjusting mechanism unit 20 is arranged on the gantry 10. As shown in FIG. 2, the nozzle position adjusting mechanism section 20 has a threaded rod 21 located at the center and arranged along the vertical direction, and the lower end of the threaded rod 21 is turned by a flanged bearing 22. It is movably supported. The bearing 22 is inserted and fixed in a through hole of the fixed block 38. Screw rod
The non-threaded portion at the top of 21 is rotatably supported by other flanged bearings 22, 22, and the upper end thereof has a boss 23a of a handle 23.
Are non-rotatably fitted via the key 24. The other flanged bearings 22, 22 are press-fitted into the central through-hole of the support block 25. A pair of guide shafts is provided on both sides of the screw rod 21.
26, 26 are arranged in parallel. These guide shafts 26
The upper end is fixedly fitted to the support block 25 via a holset 25a (see FIG. 3), and the lower end is fitted to the fixed block 23 and fixedly supported by the holset 27. A vertical movement block 28 is screwed to the screw rod 21. Guide shafts 26, 26 are inserted through the vertical movement block 28 through bearings 29, 29, and a mounting shaft 31 of a spray gun 30 (see FIG. 5) is protruded from one end. As shown in FIG. 1, the mounting shaft 31 projects perpendicularly to the rotation axis of the driving roller 12, and the spray gun 30 shown in FIG. 5 is mounted and fixed. This spray gun 30
It has a known structure itself, and is fixed to the mounting shaft 31 by inserting the mounting shaft 31 into the insertion portion 32, screwing the fixing bolt 33 into the insertion portion 32, and pressing the fixing bolt 33 against the flat surface of the mounting shaft 31. ing. The spray gun 30 has an air supply pipe 34 and a primer supply pipe 35 connected via a connector, and is connected to an air supply unit and a primer supply unit (not shown). A pressure feed pipe 36 having substantially the same length as the length of the mold 1 is attached to the spray port of the spray gun 30, and an injection nozzle 37 is fixed to the tip of the pressure feed pipe 36. As shown in FIG. 1, the pressure feed pipe 36 extends between the driving roller 12 and the driven roller 13 in parallel with the rollers. Injection nozzle
Reference numeral 37 denotes a circular nozzle which has a large number of circular holes and injects the primer 8 in the circumferential direction (see FIG. 6).

In the nozzle position adjusting mechanism section 20 having the above configuration, when the handle 23 is turned, the screw rod 21 rotates. on the other hand,
Since the guide shafts 26 are inserted through the vertically moving block 28 screwed to the screw rod 21, even if the screw rod 21 rotates, the rotation is prevented. Therefore, since the vertical movement block 28 moves up and down by the rotation of the screw rod 21, the spray gun 30 fixed to the mounting shaft 31 can be moved up and down to position the injection nozzle 37 on the center axis of the mold 1. .

On the gantry 10, a reciprocating mechanism 39 is further arranged.
The reciprocating mechanism 39 has a rectangular slide base 40, as shown in FIGS. As shown in FIGS. 2 and 3, a fixing block 38 for moving the nozzle position adjusting mechanism 20 is fixed to the slide base 40 with bolts 41. Slide base
Guide rollers 44 are rotatably mounted on the lower surfaces of the four corners of the 40 via bolts 42 and nuts 43. These guide rollers 44 have engagement grooves having a V-shaped cross section, and
45 are engaged with V-shaped protrusions formed on both end faces. The guide plate 45 is disposed in parallel to the driving roller 12 as shown in FIG. 1, and is provided on the upper surface of the reinforcing plate 47 via bolts 46 as shown in FIGS. Fixed. The reinforcing plate 47 is fixed on the gantry 10 via bolts 48. A connecting member 49 is fixed to the upper surface of the slide base 40 via a bolt 50. As shown in FIG. 1, a connecting pipe is connected to this connecting member 40 through a joint nut 51.
52 is connected, and the connecting pipe 52 is connected to the rod of the air cylinder 53.
The tip of 53a is fixed. The air cylinder 53 is fixed on the gantry 10 via a fixing base 54, and is connected to an air supply side (not shown). Therefore, when the rod 53a is projected by operating the air cylinder 53, the slide base 40
Moves on the guide plate 45 via the guide roller 44, so that the nozzle position adjusting mechanism 20 also moves, and the injection nozzle 37 moves together with the pressure feed pipe 36 between the rollers 12, 13 in FIG. Displace to the right. Also, rod 53a
When the roller is retracted, the slide base 40 similarly moves in the opposite direction, and the injection nozzle 37 is displaced between the rollers 12, 13 to the position shown in FIG.

Further, as shown in FIG. 1, a pair of limit switches 55 and 56 are arranged on the gantry 10 at a position facing the guide plate 45. As shown in FIGS. 1 and 4, a U-shaped slide block 57 is fixed to the lower surface of the limit switches 55 and 56, and the slide block 57 is slidably fitted to a slide rail 58. I have. A bracket 59 is fixed to the rear end of each limit switch.
59, 59 are mutually connected by a connection plate 60. Connection plate 60
A rotatable shaft 61a of a handle 61 is rotatably inserted through the shaft, and a cam plate 62 is attached to the rotatable shaft 61a. This cam plate 6
2. When the handle 61 is positioned at a position orthogonal to the slide rail 58 as shown in FIG.
The limit switches 55 and 56 are positioned and fixed by contacting the opposite end surfaces of the fixed rail 58 and the fixed rail 63. Also handle 6
When the rotating operation of 1 is performed, the contact of the cam plate 62 is released, so that both limit switches 55 and 56 can be moved and displaced on the slide rail 58.

By the way, one limit switch 55 is used to control the injection of the nozzle 37, and the other limit switch is used.
Reference numeral 56 is used to control the movement of the slide base 40. On the other hand, a contact piece (dock) 64 for operating the contacts of the limit switches 55 and 56 is fixed to the front surface of the fixed block 38 of the nozzle position adjusting mechanism 20.

As shown in FIG. 7, the limit switches 55 and 56 are connected to a control unit 65, and the geared motor 17 is connected to the control unit 65 via a drive circuit 66.

 Next, the operation of the primer coating apparatus of the present invention will be described.

First, the air cylinder 53 is operated under the control of the control unit 65 to project the rod 53a, and the slide base 40 is moved rightward in FIG. With the movement of the slide base 40, the contact piece 64 contacts the contacts of the limit switches 55 and 56,
The switches 55 and 56 are turned off. Thereby, the control unit 65 determines that the slide base 40 has moved to the predetermined start position, and sets the air cylinder 53 to the rod 53a.
Is kept in a protruding state.

Next, as shown in FIGS. 1 and 6, the mold 1 is placed and supported on the driving roller 12 and the driven roller 13. The roller tube 5 is inserted into the mold 1 with both ends 5a, 5a folded back.

Next, as described above, the handle 23 of the nozzle position adjusting mechanism section 20 is rotated to position the injection nozzle 37 on the central axis of the mold 1.

When the start button is pressed at the time when the preparation operation described above is completed, the control unit 65 supplies a drive signal to the drive circuit 66 to drive the geared motor 17 and to apply the turning power to the mold 1 as described above. . Further, the control unit 65 simultaneously operates the air cylinder 53 to start the retreat operation of the rod 53a.
Since the contact piece 64 switches the limit switch 56 to the ON state in the retreating operation, the control unit 65 determines that the slide base 40 has started moving accurately. When the rod 53a further retreats, as shown in FIG. 6, the injection nozzle 37 enters the mold 1 along with the pressure feeding pipe 36 along the center axis thereof, and at the same time, the contact piece 64 turns the limit switch 55 ON. Switch. When the limit switch 55 is switched to the ON state, the control unit 65 starts the operation of the spray gun 30.

Therefore, the injection nozzle 37 enters the rotating mold 1 and injects the primer 8 to the inner peripheral surface of the roller tube 5 while moving along the central axis. When the rod 53a is retracted to the position shown in FIG. 1, since the injection nozzle 37 has moved to the end of the mold 1, the primer 8 can be injected onto the entire inner peripheral surface of the roller tube 5. On the other hand, when the rod 53a is retracted to the position shown in FIG. 1, another limit switch (not shown) is turned on, and the control unit 65 detects this and stops the operation of the spray gun 30.

As described above, when the primer is sprayed while moving the spray nozzle 37 at a constant speed in the rotating mold 1, the primer can be uniformly applied to the inner peripheral surface of the roller tube 5, and furthermore, the primer is sprayed. Will not accumulate. Further, since the injection nozzle 37 moves in a non-contact manner with the roller tube 5, it is possible to reliably prevent the roller tube 5 from being scratched or adhered with foreign matter. Therefore, a rubber roller excellent in quality can be obtained.

After the rod 53a has retreated to the position shown in FIG. 1, the air cylinder 53 is operated as it is to cause the rod 53a to protrude, and the limit switches 55 and 56 are switched to the OFF state.
As a result, the mold 1 on which the coating operation has been completed can be removed, and the next mold 1 can be set.

Note that the spray gun 30 may be operated while the injection nozzle 37 is reciprocated in the mold 1 so as to perform double application.

(Effects of the Invention) As described above, according to the present invention, the mold is rotated by the mold rotating mechanism, and the injection nozzle of the primer injection means is moved to the center of the mold by the nozzle position adjusting mechanism. By positioning the nozzle on the shaft and moving the nozzle position adjusting mechanism by the reciprocating mechanism, it is possible to inject the primer onto the inner peripheral surface of the roller tube while moving the injection nozzle in the rotating mold. it can. Therefore, it is possible to provide a primer coating apparatus capable of applying the primer uniformly and with good workability without damaging the inner peripheral surface of the roller tube or adhering foreign matter.

[Brief description of the drawings]

FIG. 1 is a plan view of a primer coating apparatus according to the present invention, and FIG.
FIG. 3 is a front view showing a part of the apparatus in a cutaway view, and FIG.
4 is a cross-sectional view of the limit switch mounting mechanism according to the present invention, FIG. 5 is a front view of the spray gun, and FIG. 6 is a cross-sectional view illustrating the operation of the apparatus of the present invention. Figure,
FIG. 7 is a block diagram showing a control system of the apparatus of the present invention, and FIG.
The figure is a cross-sectional view illustrating a method for manufacturing a rubber roller using a roller tube. 1 ... Die, 5 ... Roller tube, 8 ... Primer, 10 ... Stand, 11 ... Die rotation mechanism, 12 ... Driving roller, 13 ... Driving roller, 17 ... Geared motor , 20 ... Nozzle position adjusting mechanism, 21 ... Screw rod, 28 ... Vertical block, 30 ... Spray gun, 31 ... Mounting shaft, 39 ... Reciprocating mechanism, 40 ... Slide base, 45 ... ... Guide plate, 53 ... Air cylinder, 55,56 ... Limit switch.

Claims (1)

(57) [Claims] An apparatus for applying a primer to an inner peripheral surface of a roller tube disposed in a cylindrical mold, comprising: a driving roller and a driven roller for supporting and rotating the mold. A mold rotating mechanism, a primer ejecting means for ejecting the primer from an ejection nozzle at a tip, and a nozzle position for fixing the primer ejection means and positioning the ejection nozzle on a central axis of the mold. An adjusting mechanism, and a guide plate provided in parallel with the center axis of the driving roller to reciprocate the injection nozzle in the mold along the center axis thereof, and the guide plate is connected to the nozzle position adjusting mechanism. A guide roller engaged with both end surfaces of the guide plate via a provided slide base is provided rotatably, and a reciprocating mechanism for moving the nozzle position adjusting mechanism is provided. Primer coating device of the roller tube.