JP2001018098A - Motor-operated press provided with mechanism for preventing dust generation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a press greatly suitable for executing press working in factories, laboratories or the like whose inside is constructed as a clean room and to impart the press a simple structure. SOLUTION: This press consists of a casing A whose inside is hermetically partioned from the outside, a casing space sucking tube 10 which is mounted in the casing A and a connecting port part 11 by which the inside of the casing A is communicated with the outside and which sucks dust and dirt inside the casing A to the outside of the casing A through the casing space sucking tube 10 and, by making slitted hole parts 13 open, the motor-operated press can be made into a press of a specification which is appropriate for an unclean room, so this press is sufficiently usable for press working in rooms other than the clean room.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor equipped with a dust prevention mechanism which is extremely suitable for performing a press work in a factory or a laboratory where the inside is a clean room, and which can have a simple structure. About the press.

[0002]

2. Description of the Related Art In factories or laboratories for assembling precision instruments such as optical instruments, measuring instruments, and watches, and for manufacturing electronic components such as semiconductors and liquid crystals, at a manufacturing stage of products or developed products, devices and instruments are manufactured. Even a small amount of dust, dust, or the like, entering the component may result in a defective product. In order to prevent such a situation, many factories have a clean room, or the entire factory is a clean room.

[0003] In such a clean room, employees are obliged to wear work clothes which are less likely to generate dust. Further, machine tools, inspection machines, and the like used in the clean room must also have a dust generation preventing function. The function of preventing dust generation is the vibration,
This is a function to prevent dust and dust from being generated from impact, friction, etc., and to be spilled into the product.

[0004]

In general, the casing of a machine tool such as a small machine robot is composed of a plurality of parts, and these are assembled. However, a slight gap is formed at the joint. These gaps are not a problem at all if the machine tool is used in an environment that does not require much attention to dust and dirt.

[0005] However, as described above, in a work performed in a clean room in assembling precision equipment and manufacturing electronic parts, a general machine tool cannot be used as it is. Because, when the machine tool operates, dust and dust are generated due to a slight impact at the time of starting and vibration generated during the operation, and the dust and the dust may enter into an important part of the manufactured product. Because.

[0006] The cause of the generation of these dusts is as follows.
For example, an electric motor serving as a rotary drive source, a ball screw device serving as a driven source and a belt for transmitting drive between the two are used for various kinds of metals, synthetic resins, rubbers, etc. due to wear during operation. Dust is generated and is scattered to the outside through various gaps of the casing, and is sneak into an important part in a product assembling and manufacturing stage, resulting in a defective product.

Therefore, a machine tool used in a clean room needs a function for preventing dust generation.
Machine tools having such a function and capable of withstanding use in a clean room have been developed, but many of them have a large dust prevention function, are large, and are complex in general. Tend to be structural. In addition, a slit is formed in the casing for cooling the heat generated by the operation of the motor that drives the machine tool with air. Dust and dust may also leak from such a cooling slit. Further, when a cooling fan such as a motor is mounted in the casing, a larger amount of dust is scattered to the outside of the casing.

[0008] To this end, the applicant has proposed in Japanese Patent Application No. 11-25543 an electric press equipped with a dust-prevention mechanism in addition to sealing to prevent dust from being scattered. However, when the above-described electric press is used outside the clean room due to the convenience of the site or a change in use, heat generated inside the body cannot be radiated by a seal or the like. As a result, the built-in mechanical parts and electric parts will be affected by heat.

[0009]

The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, have found that the present invention provides a casing that confidentially separates the inside and the outside, and the inside and outside of the casing. And a connection port for sucking dust and dust inside the casing to the outside of the casing.
This problem is solved by providing an electric press provided with a dust prevention mechanism, wherein the casing is formed with a cooling slit that can be opened and closed in a confidential manner.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. The external configuration of the electric press according to the present invention includes the casing A and the working bed 3.
And the casing A has confidentiality. The casing A includes a head 1 and a column 2 (see FIGS. 1 and 2).

An operation panel is arranged on the front side of the head section 1. A column portion 2 is formed below the head portion 1, and a joint portion between the head portion 1 and the column portion 2 is
Sealed to provide a confidential structure. Further, the head portion 1 and the column portion 2 have a shape having excellent rigidity.
The confidential state includes a substantially confidential state, and the casing A does not have to secure perfect confidentiality.

A work bed 3 is provided below the casing A, on which a work is placed, and various press operations are performed on the work. A controller 4 is arranged in front of the work bed 3. The working bed 3 and the casing A assembled on the working bed 3 are confidentially joined, and the inner side and the outer side are confidentially partitioned. Further, when the casing A has components other than the head portion 1 and the column portion 2, the joining portions of the plurality of components are also made to be a confidential structure by the sealing material.

The main components mounted in the casing A are a drive unit 5, a drive transmission unit 6, a press structure unit 7, and a control device unit 8. The above components are driven by themselves or transmitted. The drive unit 5 is specifically an electric motor. The drive transmission unit 6 includes the drive unit 5
And a portion for transmitting power to the press structure portion 7, and mainly includes a belt 6a, a pulley 6b, and the like.

The press structure 7 comprises a ram 7a and a ram drive 7b for driving the ram 7a in the vertical direction. The ram portion 7a performs a pressing operation on the workpiece placed on the work bed 3. Ram drive unit 7b
Has a substantially cylindrical shape, the cylindrical member is rotated by a ball screw member, and the shaft member on which the ram portion 7a is mounted moves vertically by a stroke s (see FIG. 2).

The ram portion 7a of the press structure portion 7 has a bellows-like dust boot 14 between its periphery and the head portion 1.
Is mounted, the dust boot 14 extends when the ram portion 7a descends, and the dust boot 14
Are shrunk (see FIG. 2). The dust boot 14 prevents the dust inside the casing A from leaking out of the casing A during the raising / lowering operation of the ram portion 7a.

In the casing A, an in-casing suction pipe 10 is mounted. The suction pipe 10 in the casing
Is provided with a route that passes through a portion close to a component, such as the drive unit 5, the drive transmission unit 6, and the press structure unit 7, which may vibrate or generate an impact during driving. (See FIG. 2).

The suction pipe 10 in the casing is provided with a pipe section 10.
a and a dust suction hole 10b (see FIG. 3). As the material of the suction tube 10 in the casing, a metal tube such as stainless steel, a synthetic resin such as silicon rubber, or the like is used, but other materials may be used.

The pipe portion 10a is provided with a route in the casing A that is close to a portion where the driving portion 5, the drive transmitting portion 6 and the press structure portion 7 may generate dust.
The dust suction hole 10b is provided in the pipe 1 over a range close to the drive unit 5, the drive transmission unit 6 and the press structure 7.
0a.

An example of the dust suction hole 10b is a plurality of small suction holes 10b formed at predetermined intervals.
.., 10b1,... The suction hole 10
B1, 10b1,... are intended to suck in dust and absorb the heat generated by each device. FIG. 4 (A)
(B) shows a state in which dust particles d from the constituent parts (the driving unit 5, the driving transmission unit 6, the press structure unit 7, and the control device unit 8) are sucked.

As another embodiment of the dust suction hole 10b, the drive unit 5, the drive transmission unit 6, the press structure unit 7, and the control device unit 8 are formed in a long hole shape along the proximity area. Sometimes. Tube part 1 of suction pipe 10 in the casing
0a is attached to the column 2 of the casing A,
The structure communicates with the outside of the casing A. Specifically, a connection port 11 is mounted on the outer surface of the column section 2, and the connection port 11 is connected to the pipe 10a.

A pressure regulating valve 12 is mounted on the casing A. The pressure regulating valve 12 constantly regulates, for example, a constant change in the air pressure in the casing A due to the elevation of the ram 7 a in the press structure 7. The pressure inside the casing A can be appropriately adjusted by flowing the air in the clean room into the casing A by the pressure adjusting valve 12. The pressure adjusting valve 12 may be electromagnetically adjusted, manually adjusted, or may be equipped with a pressure sensor so that it can operate at a predetermined pressure.

The electric press has an external exhaust pipe 15 outside the casing A, and connects the external exhaust pipe 15 to the connection port 1.
1 and communicate with the suction pipe 10 in the casing. A blower 16 is placed outside the clean room,
The other end of the external exhaust pipe 15 is connected to a blower 16. Then, by the suction operation of the blower 16, the dust in the casing A is constantly discharged to the outside from the electric press in the operating state. As described above, since the casing A is in a confidential state, even though the clean air in the clean room may be sucked in, the dust does not leak out into the clean room. The external exhaust pipe 15 may be equipped with a flow meter 17 (see FIGS. 2 and 7).

Next, regarding another embodiment of the present invention,
As described above, the casing A has a structure in which the inside and the outside are confidentially separated from each other, but the casing A is not provided with the in-casing suction pipe 10 (FIGS. 6 and 7).
reference). In the casing A, a connection port 11 is formed, and the casing A is in a confidential room state separated from the outside, and a drive unit 5, a drive transmission unit 6, a press structure unit 7, and a control device unit provided therein. The dust generated from the inside 8 is sucked from the inside of the casing A of the connection port 11.

Next, an embodiment in which the cooling slit holes 13 are provided in the head portion 1 and the column portion 2 of the casing A will be described (see FIG. 8). The cooling slit hole 13
Is such that the electric press of the present invention can be used in a work place other than a clean room.

That is, when the electric press of the present invention is used in a place other than the clean room, the cooling slit 13 is opened so that outside air can enter and exit the casing A. Drive unit 5,
The components that easily generate heat, such as the press structure 7 or the control device 8, can be cooled. In this case, the exhaust device such as the blower may be stopped, and the exhaust device such as the blower may be activated and actively cooled.
Alternatively, air may be taken in from the cooling slit hole 13 by blowing out the blower. It is also effective to provide a fan for discharging air from the cooling slit 13 in the casing instead of the blower. This fan may be operated by switch means so as to operate when used outside the clean room.

The cooling slit 13 is openable and closable. When the cooling slit is closed, the inside of the casing A is kept secret and the outside and the inside of the casing A are partitioned in a secret manner. Things. The cooling slit 13 is mainly composed of a fixed slit 13a and a movable slit plate member 13b (see FIG. 9A).

The fixed slit portion 13a is formed integrally with the casing A. A plurality of fixed slit holes 13a1, 13a1,... Are formed in a line at a predetermined interval. Or column part 2
(See FIG. 9A).

The movable slit plate member 13b has a plate shape and is disposed on the fixed slit portion 13a. The movable slit plate member 13b also has a fixed slit hole 13a1 formed in the fixed slit portion 13a.
, 13a1,..., A plurality of movable slit holes 13
b1, 13b1,... are formed. The intervals between the movable slit holes 13b1, 13b1,... Are formed to be equal to the intervals between the fixed slit holes 13a1, 13a1,.

A plurality of screw holes 13c1, 13c1... Are formed on the fixed slit portion 13a side, while the screw holes 13c, 1c are formed in the movable slit plate member 13b.
Slots 13c2, 13c2,... Corresponding to the positions of 3c,.
Are formed. The movable slit plate member 13b is fixed to the fixed slit portion 13a via screw members 13d, 13d,.
Fixed on top.

By loosening the screw members 13d, 13d,..., The movable slit plate member 13b slides on the fixed slit portion 13a along the longitudinal direction of the long holes 13c2, 13c2,. , 13
The slits can be opened and closed by making the positions of b1,... and the fixed slit holes 13a1, 13a1,... coincide or shift [see FIGS. 9B and 9C]. . The built-in fan may be operated when the opening of the slit is detected by the means for detecting the opening and closing of the slit. As a means for detecting the opening and closing of the slit, a microswitch or the like for detecting the moving amount of the movable slit plate member 13b is effective.

The cooling slit 13 is formed as shown in FIG.
As shown in FIG. 5, the fixed slit portion 13a is covered with a lid member 13e having no cooling slit hole, and the screw members 13d,
There is also an embodiment that closes confidentially by tightening at 13d,. When the cooling slit 13 is opened, the lid 13e is removed.

[0032]

According to the first aspect of the present invention, there is provided an electric press provided with a dust prevention mechanism including a casing A for partitioning the inside and the outside from each other in a confidential manner, and a connection port 11 for communicating the inside and the outside of the casing A. As a result, a hose or the like is connected to the connection port 11 from the outside of the casing A, and the other end of the hose is connected to a blower or a vacuum pump.
By activating the internal air to the outside,
During the operation of the electric press, dust and dust generated from the dust-forming components inside the casing A can be sucked. Thereby, when using the electric press in a clean room, it is possible to perform a good press work without taking out dust and dirt inside the casing A to the outside, and the casing A can be freely opened and closed in a confidential manner. By using an electric press having a dust prevention mechanism formed with the cooling slit hole 13, the electric press can be used in a non-clean room by opening the cooling slit hole 13. It can be used in specifications and can be used satisfactorily in press work other than in a clean room.

Next, according to a second aspect of the present invention, in the first aspect, the cooling slits 13 are formed in the fixed slits 1.
3a and a movable slit plate member 13b, and an electric press provided with a dust prevention mechanism in which the movable slit plate member 13b is slidably provided with respect to the fixed slit portion 13a. The switching of the open / closed state in 13 only requires sliding the movable slit plate member 13b on the fixed slit portion 13a.

As described above, by an extremely simple operation,
The opening and closing of the cooling slit can be switched, whereby the electric press can be easily set to the use state of the clean room specification and the non-clean room specification.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electric press.

FIG. 2 is a vertical sectional side view of the electric press.

FIG. 3 is a perspective view showing a configuration of a suction pipe in a casing and components in a casing.

FIG. 4 (A) is a partially cutaway plan view showing a state in which a suction pipe in a casing sucks dust and dust from components, and FIG. 4 (B) is a view in which a suction pipe in a casing sucks dust and dust from components. Partially cut-away side view showing the condition

FIG. 5 is a perspective view of the electric press as viewed from the front.

FIG. 6 is a perspective view of a second embodiment of the present invention.

FIG. 7 is a longitudinal sectional side view of a second embodiment of the present invention.

FIG. 8 is a perspective view of an embodiment in which a cooling slit is provided in the electric press.

9A is a perspective view of a fixed slit portion and a movable slit plate member. FIG. 9B is a cross-sectional view of the cooling slit hole portion in an open state. FIG. 9C is a cross-sectional view of the cooling slit hole portion in a closed state.

FIG. 10 is a longitudinal side view of another embodiment of the cooling slit hole.

[Explanation of symbols]

 A: Casing 10: Suction pipe in casing 10b: Dust suction hole 11: Connection port 12: Pressure regulating valve 13: Slit hole for cooling 15: External exhaust pipe 16: Blower

Claims (2)

[Claims] A casing that confidentially separates the inside and the outside from each other, and a connection port that communicates the inside and the outside of the casing with each other and sucks dust and dust inside the casing to the outside of the casing; An electric press having a dust-prevention mechanism, characterized by forming a slit for cooling that can be opened and closed in a confidential manner. 2. The cooling slit according to claim 1, wherein the cooling slit comprises a fixed slit and a movable slit plate, and the movable slit plate is slidably provided with respect to the fixed slit. An electric press equipped with a characteristic dust prevention mechanism.