JPS6342762A - Multi-stage disassembly type rotary joint - Google Patents

Abstract

PURPOSE:To repair or exchange only the necessary circuit and to facilitate additional installation of the circuits by parting and forming a main spindle by each circuit so that the main spindle can be separated and disassembled. CONSTITUTION:The main spindle of the rotary joint of a rotary type automatic painter is formed by stacking the plural circuits 1-5 divided in the longitudinal direction to multiple stages so that the respective circuits 1-5 can be separated and disassembled. A flow passage 6a running through the circuits 1-5 is first formed at the center of the main spindle so as to be used for air feeding, etc. Cross holes 12, 14, 17 are provided to the circuits 1, 2, 4 to feed paint, air, etc., to the circuits. Junctures 29 connecting the circuits 1-5 are formed to the top or bottom end or both top and bottom ends of the circuits 1-5. Only the arbitrary circuit is then removable or exchangeable and maintenance is facilitated and is economical.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) This invention relates to a rotary joint for a rotary complete automatic coating machine.

(Prior Art and Problems to be Solved by the Invention) Conventionally, this type of spout-tally joint has to be repaired by disassembling the entire shaft every time the seals in the air and paint circuits deteriorate, even if it is only in one place. The maintenance was quite troublesome.

Furthermore, if one circuit becomes defective, the entire shaft becomes unusable and must be replaced, resulting in a large economic loss.

Furthermore, depending on the coating conditions, the design had to be changed, such as by increasing the number of coating circuits, and each time a different type of joint was required to be manufactured.

In view of the above-mentioned problems of the conventional art, the present invention provides a multi-stage system that allows only the circuits that require repair or replacement to be removed or replaced, and that additional circuits can be added by simply adding them to the existing joint. The purpose is to provide a disassembly type rotary joint.

(Means for Solving the Problems) In order to achieve the above object, the present invention has the following configuration. That is, in the multi-stage disassembly type rotary joint according to the present invention, the main shaft is divided in the longitudinal direction so that each circuit can be separated and disassembled, and each connection is formed at the upper end or the lower end of the circuits, or at both the upper and lower ends. The parts are connected to each other by tightening fasteners.

(Example) Hereinafter, this invention will be described as a double-acting shaft rotary joint that rotates in synchronization with the revolution of a spray gun and rotates the spray gun by rotatably attaching it to a rotating fixed plate. An embodiment of the present invention will be described based on the drawings.

The main shaft of this rotary joint is formed by stacking a plurality of circuits 1 to 5 divided in the longitudinal direction in multiple stages, and each circuit 1 to 5 can be separated and disassembled. There is.

First, in the center of the main shaft, there is a flow path 6 that passes through each circuit 1 to 5.
An air hose 9 for feeding first air, for example, atomizing air, is connected to an opening 7 at one end of the flow path 6a via a joint 8. On the other hand, the flow path 6a
The other end is an air outlet 1] 10, which is piped to one or more spray guns (not shown).

Further, on this main shaft, channels 61], 6c, 6d, . . . for the second air or for the necessary number of paint systems are formed as appropriate.

That is, the circuit 1 is provided with a horizontal hole 12 that communicates with a hose 11 for feeding second air, for example, pilot air. One end of the flow path 6b passing through each of the circuits 1 to 5 is connected to the horizontal hole 12, and the other end is connected to a spray gun.

The circuit 2 also includes a paint hose 1 for feeding the first paint.
A horizontal hole 14 communicating with 3 is opened. The horizontal hole 14 is connected to one end of the flow path 6C passing through each of the circuits 2 to 5, and the other end is a paint outlet, and a first paint feeder connected to the side circumference of the terminal circuit 5 is connected to the side hole 14. The paint hose 15 is connected to the spray gun.

Further, the circuit 4 includes a second paint having a different color from the first paint.
Horizontal hole 17 communicating with paint hose 16 for feeding paint
Open the day. One end of the flow path 6c passing through the circuits 4 and 5 is connected to the horizontal hole 17, and the other end is also a paint outlet, and a second paint feedout connected to the side circumference of the terminal circuit 5 is connected to the side hole 17. The paint hose 18 is connected to the spray gun.

Note that circuit 3 includes a pulley P that transmits rotational force to the entire main shaft.
Attach.

Each of the circuits 1, 2, 4, and 5 is provided with a gasket 19 at its sealing portion, and a cylindrical housing 21 having a ball bearing 20 installed at one end is attached to its outer periphery. In addition, a housing 22 with a 7-run nose with ball bearings 20 installed at both ends is attached to the outer periphery of the circuit 3. It is fixed to a fixed plate 24 for revolving.

Each housing 21 is provided with a through hole 25 that communicates with the horizontal holes 12.14 and 17 formed in each circuit 1, 2 and 4, and the hose 11.
[And connect 16. Moreover, each housing 21 is
A support arm 26 is provided that protrudes from the side circumference, and a vertically extending support column 28 fixed to the fixed plate 24 is inserted into a bifurcated opening 27 formed at the tip thereof.

By inserting this support 128, rotation of the housing 21 can be prevented.

Then, connecting portions 29 for connecting the circuits 1 to 5, respectively, are formed at the second end, the lower end, or both upper and lower ends of each of the circuits 1 to 5.

The connecting portion 29 includes, for example, a sloped convex portion 30 formed by notching around the end of the circuit body, and by tightening a stopper 32 to the connecting portion 29,
Each circuit 1-5 is interconnected.

That is, as shown in FIGS. 2 and 3, for example, the stopper 32 consists of three stopper pieces 32a to 32C that are ring-shaped and divided into three parts. The peripheral surface is provided with a tapered recess 33 that fits exactly into the sloped convex portion 30 of the connecting portion 29 .

Further, a notch end surface portion 36 for inserting a bolt 35 is formed on the outer periphery of each of the stopper pieces 32a to 32c, and is located parallel to the negative end surface 34 thereof. Then, this end surface portion 3
6 has a bolt hole 37 penetrating to the negative side end face 34, while the other side end face 38 has a through hole located communicating with the bolt hole 37 formed in the other adjacent stop pieces 32a to 32c. Drill screw hole 39.

Therefore, by screwing the bolt 35, the fastener pieces 328 to
32c are tightened together to firmly connect each circuit 1-5.

In addition, 40 is a knock pin for positioning when assembling each circuit 1-5.

In this embodiment, a flow path 6b for pilot air is formed, but depending on the type of spray gun, pilot air may not be necessary, and this flow path 6b may be used for paint. In addition, although the flow path 6d was used for the second paint,
If necessary, spray n may be used to form a paint circulation circuit.
It may also be used as a return flow path for returning excess paint. In this way, each of the flow paths 68 to 6d is appropriately changed and used depending on the coating conditions.

Further, in this embodiment, an example of the first fitting 32 has a three-part structure, but the invention is not limited to this example.
A configuration of 60% or 30% or more may also be used. Further, although a tapered recess 33 was formed on the inner circumferential surface of this stopper 32 to correspond to the slope convex part 30, the gate part 33 does not necessarily have to be tapered. Any shape that corresponds to the shape and fits into the protrusion 30 may be used.However, if it is tapered, the connecting portion 29 can be tightly tightened.

Of course, the stopper 32 is 8! Functionally, any device that can connect the connecting portions 29 of the circuits 1 to 5 to each other by tightening is sufficient, and therefore, for example, various known tightening devices may be used or repurposed.

Now, the operation of the multistage disassembly type rotary joint according to the present invention constructed as described above will be explained.

For example, assume that the seal portion of the circuit 2 has deteriorated and its gasket 19 needs to be replaced. At this time, first, the stopper 32 connecting the circuit 1 and the circuit 2, and
The straight guard 32 connecting circuit 2 and circuit 3 is removed.

Then, slightly lift circuit 1 and circuit 2 together with their housing 21 upwards, remove the knock pin 40 that connects circuit 1 and circuit 2, and pull out only circuit 2 along with its housing 21 laterally. (After pulling it out, disassemble it and replace the deteriorated packing 19,
By performing the above operation in reverse again, circuit 2 is changed to circuit 1.
and circuit 3.

For example, if it becomes necessary to add a coating circuit depending on coating conditions, the stopper 14c32 connecting the circuits 4 and 5 is removed and the circuit 5 is pulled out. and,
Additional circuits with increased flow paths are sequentially connected in a multi-stage manner from the bottom of the circuit 4. The circuit located at the bottom has a large number of flow paths (
Become.

On the other hand, if circuit 4 is removed and circuit 5 is directly connected to circuit 3, the number of painting circuits can be reduced.

FIG. 4 1 shows another embodiment of this invention,
The main difference from the previous embodiment is that a mechanical seal 41 is used as the seal member. The same reference numerals are given to members that perform the same functions as those in the previous embodiment.

Although the above example has shown an embodiment of this invention in a double-acting shaft type rotary joint, it is possible to apply not only a double-acting shaft type rotary joint but also a single-acting shaft type rotary joint, that is, a spray gun that rotates on its axis only by revolution. Needless to say, it can also be applied to a type of rotary joint that does not allow any rotation.

(Effects of the Invention) As is clear from the above detailed description, the multi-stage disassembly type rotary joint according to the present invention has the main shaft separated and formed so that each circuit can be separated and disassembled, so that only an arbitrary circuit can be removed. It can be replaced.

Therefore, even if the joint has a complex structure consisting of a plurality of air circuits or paint circuits, it is only necessary to remove the circuit in the repaired or replaced part, making maintenance extremely easy and economical.

Furthermore, even if it becomes necessary to add a coating circuit or the like depending on the coating conditions, this can be done simply by adding circuits in multiple stages, and there is no need to create a different type of joint.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing an embodiment of the multi-stage disassembly type rotary joint according to the present invention, Fig. 2 is an exploded perspective view of the circuit connection section, Fig. 3 is a plan view of the stopper, and Fig. 4 is It is a longitudinal cross-sectional view which shows another Example. 1 to 5...Circuit 29...Connection part 30...Gradient convex part 32...
...Stopper 33...Taber recess patent applicant Tokiwa Electric Co., Ltd. Agent
Person Patent Attorney Hikaru Tsukasa Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1) The main shaft is divided in the longitudinal direction so that each circuit can be separated and disassembled, and a stopper is tightened at each connection portion formed at the upper end or lower end of the circuits, or at both upper and lower ends. A multi-stage disassembled rotary joint that is interconnected. 2) The stopper has a ring shape as a whole and is divided into a plurality of parts, each of which has a tapered recess on its inner peripheral surface that fits into the sloped convex part formed at the connection part of each circuit. A multi-stage disassembled rotary joint according to claim 1, comprising: