JPS6161999A - Manufacture of multiplex ejector - Google Patents

Abstract

PURPOSE:To provide a multiple ejector with high degree of vacuum, which can be assembled easily, by forming the body of ejectors in a single piece so as to have a compressed air lead-in chamber, a vacuum generating chamber and an exhaust chamber, which are partitioned by walls installed at a certain spacing in the longitudinal direction, and by blocking each chamber with a plate provided with a plurality of ports. CONSTITUTION:A compressed air supplying chamber 14, No.1, No.2 vacuum chambers 16, 18 and an exhaust chamber 20 are formed in a rectangular body 12 of ejectors as arranged in the longitudinal direction. No.1-3 nozzles 24, 28, 32 are provided in partition walls 22, 26, 30 installed between the chambers 14, 16; 16, 18; and 18, 20. These nozzles are formed in the central part of respective walls in such a way as located in line. This ejector body 12 is molded in a single piece using a metal die, and holes 34a, 34b in the sidemost walls required at this time shall be blocked with blind plugs afterward. A flat plate 36 is arranged on one side of the body 12 while another 38 on the other side, wherein the latter shall be equipped with a compressed air supplying port 40, a vacuum port 42 and an exhaust port 46. Now the multiple ejector 10 is completed by fixing these plates.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a multiple ejector, and more specifically, a method for manufacturing a multiple ejector, in which a large number of nozzles and diffusers are formed in multiple stages using a mold.
Moreover, the present invention relates to a method of manufacturing a multiple ejector that is integrally constructed.

Ejectors have been widely used to obtain a predetermined degree of vacuum. A good example of this is that the vacuum generated through an ejector is used as a power source when moving a workpiece to another location by suction, for example in robot technology.

A desired degree of vacuum can be obtained by configuring the ejector in multiple stages, and if a plurality of nozzles and diffusers are arranged in multiple stages or in parallel, the suction force increases accordingly. Therefore, it can be suitably used in cases such as transferring relatively heavy workpieces.

By the way, a method for manufacturing a multistage ejector for obtaining a very high degree of vacuum in this way is described in, for example, Japanese Patent Publication No. 59-24280.

This publication No. 59-24280 relates to a method of manufacturing an ejector device, and this publication describes that in order to facilitate the formation of the ejector body, a predetermined material is extruded and processed to correspond to the desired degree of vacuum. A method is disclosed in which the material is cut in the longitudinal direction, and a cylindrical nozzle and diffuser are fitted into holes in a partition wall formed in advance.

As described above, according to this manufacturing method, the ejector main body can be cut as necessary, and the number of nozzles, the number of diffusers, etc. can be determined by this cutting. As a result, it is possible to obtain a versatile ejector device in which the degree of vacuum obtained varies depending on the length of the ejector body.

However, although this method provides the above-mentioned advantages, cutting the ejector body inevitably involves machining, and it also requires fitting and inserting the nozzle and diffuser, respectively. There are various inconveniences, such as the effort required and the difficulty of sufficiently sealing the fitting portions of the nozzle and diffuser. Therefore, it is not always possible to effectively obtain a desired degree of vacuum.

Moreover, since the nozzle and diffuser are inserted after the ejector body is molded, manual work is required for positioning, etc., and there are also drawbacks such as the extremely large amount of time and labor required to assemble and manufacture the ejector device. are doing.

Therefore, as a result of extensive research and ingenuity, the inventors of the present invention have developed a manufacturing method in which the ejector body, nozzle, and diffuser are assembled together through a mold, rather than cutting the ejector body according to the required degree of vacuum. If the compressed air supply source, suction port, and exhaust port are connected to this, there is no need to install the nozzle and diffuser again, and therefore, there is no need to align the nozzle and diffuser. Furthermore, it is possible to secure multiple ejectors that can obtain the desired degree of vacuum without special sealing.
It has been found that the various inconveniences mentioned above can be eliminated.

Therefore, the object of the present invention is to accurately and quickly perform the process without requiring alignment of the nozzle and diffuser, without requiring the work of inserting the nozzle and diffuser into the ejector body, and furthermore, without applying a sealing member. The object of the present invention is to provide a method for manufacturing a multiple ejector, which makes it possible to obtain a multiple ejector device.

In some cases, at least the first stage nozzle is precisely finished, while the ejector body, the nozzle fitting hole, and the diffuser are formed all at once via a mold, and the nozzle is placed in a predetermined nozzle fitting hole. If the ejector is fitted into the nozzle, there is no need to align the nozzle because of the integrally formed nozzle fitting hole, and therefore, a multiple ejector that is easy to assemble and has a higher degree of vacuum can be obtained.

In order to achieve the above object, the present invention integrally isolates an ejector body and a compressed air introduction chamber, at least two or more vacuum generation chambers, and an exhaust chamber through a partition wall for a predetermined period using a mold. and defining a nozzle portion in the partition, and further closing each of the chambers with a plate having a compressed air introduction port, a vacuum port, and an exhaust port.

Furthermore, in order to achieve the above object, the present invention integrally connects a compressed air introduction chamber, at least two or more vacuum generation chambers, and an exhaust chamber to an ejector body through a plurality of partition walls by a mold, and isolates the compressed air introduction chamber, at least two or more vacuum generation chambers, and the exhaust chamber by a predetermined interval. a step of forming a nozzle fitting hole in the first partition wall of the partition wall; a step of fitting a nozzle into the nozzle fitting hole; The method is characterized by a step of closing the air with a plate having a compressed air introduction port, a vacuum port, and an exhaust port.

Next, preferred embodiments of a method for manufacturing a multiplex ejector according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 designates a multiple ejector device, which has an ejector body 12. As shown in FIG. The ejector body I2 is basically a rectangular parallelepiped,
A compressed air supply chamber 14 whose corners are slightly rounded along its longitudinal direction; a first vacuum chamber 16 whose shape is exactly the same as the compressed air supply chamber 14;
A vacuum chamber 18 is connected to the exhaust chamber 18, and an exhaust chamber 20 communicating with an exhaust port is defined at the final stage. A partition wall 22 is formed between the compressed air supply chamber 14 and the first vacuum chamber 16,
A first nozzle 24 is formed in this partition wall 22 .

On the other hand, a partition wall 26 is formed between the first vacuum chamber 16 and the second vacuum chamber 18, and a second nozzle 28 is formed in this partition wall 26.
is defined. Furthermore, a second vacuum chamber 18 and an exhaust chamber 20
A partition wall 30 is formed between the partition wall 30 and the third partition wall 30.
A nozzle 32 is defined.

As can be easily understood from FIG. 2, the compressed air supply chamber 14, the first vacuum chamber 6, the second vacuum chamber 18, and the exhaust chamber 20
The ejector body 12 has large openings on both sides and extends transversely through the ejector main body 12.

The first nozzle 24 defined in the bulkhead 22, the second nozzle 28 formed in the bulkhead 26, and the third nozzle 32 formed in the bulkhead 30 are located in the central portion of the bulkhead, and therefore are on the same axis. ” It is formed so that it is located at the second position. In this case, holes 34a and 34b are closed by blind plugs 33a and 33b in both end walls of the ejector body 12.
are formed respectively.

This is a hole that is inevitably created because the multiple ejector device 10 is integrally constructed using a mold.

A flat plate member 36 for closing the chambers 14, 16, 18 and 20 is attached to one side of the ejector main body 12 configured as described above, for example, by means of bolts or the like, or in some cases, by force. It is attached using a suitable adhesive. On the other hand, a second flat plate 38 is similarly secured to the other side of the ejector body 12. This flat plate 38 has a compressed air supply port 40 communicating with the compressed air supply chamber 14, a first vacuum port 42 communicating with the first vacuum chamber 16), a second vacuum port 44 communicating with the second vacuum chamber 18, and Exhaust ports 46 communicating with the exhaust chamber 20 are respectively provided.

The multiple ejector device 10 configured as described above is
In particular, the ejector body 12, the first flat plate 36, and the second flat plate 38 are formed in separate processes, but the ejector body 12 in particular is molded using a mold.

For example, in order to form the ejector body 12 as shown in FIG. 3, it is sufficient to combine at least four mold members during molding. That is, the first mold member 48 and the second mold member 50, each having a U-shaped cross section, have a nozzle portion 24.2 formed between the partition wall 22), the partition wall 26, the partition wall 30, and the respective partition walls.
8.32.

On the other hand, the third mold 52 and the fourth mold 54 serve to form both end walls defining the ejector main body 12.

Therefore, the ejector main body 12 formed by the mold as described above has the first flat plate 36 and the second flat plate 38 as described above.
are joined to close the opening, and the ejector device 10 is completed.

When using this ejector device 10, pipe bodies (not shown) are connected to the compressed air supply port 40, the first vacuum port 42, the second vacuum port 44, and the exhaust port 46, respectively. Compressed air at a predetermined pressure is introduced into the hole I4 from the port 40, and is vigorously injected from the tip of the nozzle 24 toward the nozzle 28. Thereby, the air in the chamber 16 is drawn into the jet of compressed air and led out from the nozzle 28 to the next chamber 18. During this time, a predetermined degree of vacuum is obtained at the first vacuum port 42 communicating with the chamber 16 which becomes vacuum.

Furthermore, the compressed air that has reached the chamber 18 is vigorously injected from the third nozzle 32 into the exhaust chamber 20, thereby causing the second
A predetermined degree of vacuum can be obtained at the vacuum port 42 of. The air that has reached the exhaust chamber 20 is led out from the exhaust port 46.

According to the present invention, as described above, the ejector body is formed integrally with the mold, and the flat plate for closing and the flat plate having each port are simply joined to this, so that the nozzle and There is no need to perform positioning with the diffuser, and since it is integrated with the ejector main body, the rigidity is extremely high, so a robust ejector device can be obtained.

Furthermore, since the assembly process requires only joining the flat plates 36 and 38, the manufacturing process can be simplified, and since it is manufactured using a mold, it has the advantage that it can be manufactured in large quantities at extremely low cost.

In addition, FIG. 4 shows another embodiment of the present invention.

In this embodiment, the same reference numerals as in the previous embodiment indicate the same components.

In this case, in particular, since the first nozzle needs to be precise, it is possible to configure the first nozzle 60 separately and fit it into the hole formed in the partition wall 22 after precision finishing. It is. When fitting, the nozzle 60 only needs to be inserted through the hole 34a before joining the flat plate 38.

According to another embodiment of the present invention, the ejector body 12
The first nozzle 24, which requires precision, can be suitably formed by forming the first nozzle 24 roughly in advance and finishing the nozzle using a reamer or the like. In this case, the reamer can be inserted, for example, through holes 34a and 34b formed in the side wall of the ejector body 12. Furthermore, if necessary, the ejector main body 12 can be subjected to surface treatment such as plating, painting, coating, etc., thereby making it possible to flow the compressed air more smoothly and more effectively. Furthermore, depending on the shape of the mold, it is of course possible not only to simply arrange the nozzles and diffusers in multiple stages, but also to form blocks of these nozzles and diffusers in parallel to form a multiple ejector.

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 perspective explanatory view showing a combination of an ejector main body, a flat plate that closes it, and a flat plate on which various ports are formed, Fig. 2 is a cross-sectional explanatory view of the ejector device shown in Fig. 1, and Fig. 3 is a cross-sectional explanatory view of the ejector device shown in Fig. 1. FIG. 4 is a partially omitted plan view of a mold forming the ejector body of the ejector device shown in FIGS. 1 and 2, and FIG. . 10...Multiple ejector device 12...Ejector body 1
4. Compressed air supply chamber 16. First vacuum chamber 18.
-Second vacuum chamber 20...Exhaust chamber 22...Partition wall 24...First nozzle 26...Partition wall
28...Second nozzle 30...Partition wall
32...Third nozzle 33a133b...Blind plug
34a, 34b・'Hole portion 36.38・・Flat plate 40・・Compressed air supply port 42・・First vacuum port 4
4...Second vacuum port 46...Exhaust port 48.50.
52.541, Mold 60... Nozzle tone. , Yomon 1”

Claims (4)

[Claims] (1) A mold integrally forms an ejector body and a compressed air introduction chamber, at least two or more vacuum generation chambers, and an exhaust chamber spaced apart by a predetermined interval through a partition wall in the ejector body, and a nozzle portion is formed in the partition wall. A method for manufacturing a multiple ejector, comprising the steps of: defining a plurality of chambers; and further closing each of the chambers with a plate having a compressed air introduction port, a vacuum port, and an exhaust port. (2) The method according to claim 1, in which a step of grinding and/or polishing the walls of the respective chambers and the nozzle portion is provided before the step of closing with a plate. Production method. (3) A method for manufacturing a multi-layer ejector according to claim 1, further comprising a step of surface-treating the walls of the respective chambers and the nozzle portion before the step of closing with a plate. (4) integrally forming a compressed air introduction chamber, at least two or more vacuum generation chambers, and an exhaust chamber separated by a predetermined distance in the ejector body through a plurality of partition walls using a mold, and in the partition walls; A step of defining a nozzle fitting hole in the first stage partition wall, a step of fitting a nozzle into the nozzle fitting hole, and further connecting the respective chambers to a compressed air introduction port, a vacuum port, and an exhaust port. A method for manufacturing a multiple ejector, comprising the step of: closing with a plate formed with a plurality of ejectors.