CN100344420C

CN100344420C - Attractor

Info

Publication number: CN100344420C
Application number: CNB2005100562387A
Authority: CN
Inventors: 山崎清康; 北原敏正; 增沢澄成
Original assignee: Japan Hiki Shikatzu Co Ltd
Current assignee: Bisk, Japan
Priority date: 2004-03-31
Filing date: 2005-03-31
Publication date: 2007-10-24
Anticipated expiration: 2025-03-31
Also published as: KR20060044853A; JP2005288595A; TW200531904A; TWI283648B; CN1676288A

Abstract

To provide a suction pad device capable of eliminating the risk to damage a work owing to a high followup performance of the work after the surface to be sucked even if a hard material is applied to the abutting part of a suction pad for avoiding the problem of heat resistance or leaving suction marks and capable of being embodied in a simple and small (less tall) construction. The suction pad device includes the suction pad 2 furnished with through-hole(s) 10 and sucking the work abutting to the abutting part 12 around the other end of the through-hole 10, and is equipped with a casing 4 arranged so that one end of the through hole 10 in the suction pad 2 opens to inside and the suction pad 2 can protrude to inside and outside and where an inhaling hole 4b is formed for inhaling the air from the through-hole 10 and a sheet-form resilient member 6 installed stretching between the casing 4 and the suction pad 2 and supporting the suction pad 2 on the casing 4. (C)2006,JPO&NCIPI.

Description

Attractor

Technical field

The present invention relates to the attractor in the attraction equipment, it can attract and clamp workpiece so that (for example) transportation.

Background technology

Traditionally, in factory, for example use the attraction equipment that comprises attractor to transport as the workpiece of product parts

The tradition attractor comprises through hole, sucks and a contact portion from the one end by this through hole air, is arranged on the other end of through hole and contact and maintenance workpiece when suction air; Air pump unit with a suction air in through hole.

In general, contact portion is with elastomeric material manufacturing (see Japanese patent gazette No.2002-144269[traditional handicraft] joint and Figure 12 and 13).For example, nitro butadiene rubber (NBR) is as the contact portion material.

No.2002-144269 describes as Japanese patent gazette, and the contact portion made from such material has low resistance to heat, and the material of contact part adheres on the workpiece, and it is stayed similar in appearance to the attraction mark of contact part shape.

For solving low resistance to heat and attracting the mark problem, attract the contact part of part to make, for example fluorubber ([0007] joint of Japanese patent gazette No.2002-144269) with elasticity and heat resistance material.But, this material increases the cost of making attractor than the NBR costliness.

For further solving high manufacturing cost problem, attract the contact part cheap material of part, for example duroplasts, metal are made.But they have very low elasticity, therefore contact part and are difficult to meet the needs of the surface that attracts the workpiece complicated shape.For example, between contact part and surface of the work, form the space, workpiece can not fully be attracted and keep, and rigid contact damage parts workpiece.

For solving the problem of insufficient attraction and defective work piece, invent a kind of attractor (seeing [0007]-[0015] joint and Fig. 1 of Japanese patent gazette No.2003-171080).In attractor, attract the contact part of part to have bellows part, form with cutting rigid plastics or metal.By bellows part, contact portion has elasticity, makes to attract partly can attract fully and keep workpiece and unlikely defective work piece.But, bellows part is extending and is shortening perpendicular to the surface of the work direction.Therefore on described direction, be difficult to make the attractor miniaturization.In addition, bellows is to form by the cutting hard material, so the manufacturing efficient of attractor must reduce and its cost must increase.

Summary of the invention

The present invention has invented the traditional attractor problem described above that solves.

Purpose of the present invention provides a kind of small-sized and simple attractor, and it attracts the contact portion of part to make with hard material and can attract fully and keep workpiece and defective work piece not.

For achieving the goal, attractor of the present invention comprises:

Attract part, comprise through hole, suck and a contact portion from the one end, be arranged on the other end of through hole and contact and maintenance workpiece when suction air by this through hole air;

Housing, an end of through hole opens in this housing, and housing has air outlet slit, is drawn out to the external world by the through hole inhaled air from this outlet, and housing makes and attracts partly inwardly to shrink back and stretch out; With

The plate-shaped elastic component is connected in housing and attracts part, makes to attract part to become integral body with housing.

Utilize such structure, workpiece can be by attracting and maintenance by the through hole inhaled air from housing is extraneous.Owing to attract part to become integral body, attract partly can contact fully and adapt to surface of the work and defective work piece not by plate-shaped elastic component and housing.Also have, attractor has the simple structure that comprises the plate-shaped elastic component, makes its size can be less than the traditional attractor that comprises bellows part.

In attractor, the plate-shaped elastic component can be connected to the inner rim part of housing and attract the outer peripheral face of part.

In attractor, the plate-shaped elastic component is seal casinghousing and attract space between the part airtightly.Utilize such structure, do not need other seal, make the structure of attractor can be more simple and less.

In attractor, attract the contact portion of part to make at least with the material harder than plate-shaped elastic component.Adopt such structure, attract part by than attracting the softer plate-shaped elastic component of part to be kept, attract part can adapt to the surface of workpiece fully and defective work piece not.Therefore, contact portion can be used cheap material, and for example duroplasts, metal etc. can solve the low-heat resistance and attract the material of mark problem to make.

Attractor can comprise further that being used for bias voltage attracts part to make it from the outward extending bias piece of housing.Utilize bias piece, attract the moderately surface of contact workpiece of part, even attract part in the above compacted, and the repetitive positioning accuracy of attraction part can be higher.

Attractor may further include the device that constraint attracts part to extend from housing.By this restraint device, can prevent the damage and the extension of plate-shaped elastic component, even attract part to be drawn by weight such as workpiece excessively.Attract the repetitive positioning accuracy of part further to improve.

Attractor of the present invention can be very little and has simple structure.In addition, even attract the contact portion of part to make with hard material, attract partly also can attract fully and keep workpiece and defective work piece not so that improve resistance to heat and do not stay the attraction mark.

Description of drawings

Embodiments of the invention will be described by example and with reference to accompanying drawing now, wherein:

Fig. 1 is the profile of attractor embodiment of the present invention;

Fig. 2 is for attracting and keep the attractor profile of workpiece.

The specific embodiment

Describe embodiments of the invention in detail now with reference to accompanying drawing.

Fig. 1 is the side cutaway view of attractor A embodiment of the present invention.

Attractor A comprises and attracts part 2, and housing 4 is made and as the plate-shaped rubber parts 6 of plate-shaped elastic component with as the spring 8 of bias piece with synthetic rubber.

Attract part 2 to comprise cylindrical member 2a and skirt-shaped part 2b, wherein at one end form contact portion 12 with through hole 10.Contact portion 12 contact workpieces when attracting part 2 to attract and keeping workpiece.

Form ball 14 at skirt-shaped part 2b one end.Through hole 18 is communicated with the concave part 16 that is surrounded by ball 14 and the skirt-shaped part 2b other end 20.

The overall diameter of cylindrical member 2a is the interior diameter of skirt-shaped part 2b through hole 18 no better than.End at cylindrical member 2a forms major diameter part 22, and its overall diameter is greater than the overall diameter of 2a.

The small diameter portion of cylindrical member 2a is inserted in the through hole 18.Snap ring 24 is configured in the groove 26, and this groove is formed on the neighboring face of cylindrical member 2a.According to such structure, skirt-shaped part 2b is clamped between major diameter part 22 and the snap ring 24, makes cylindrical member 2a and skirt-shaped part 2b become integral body.Notice that cylindrical member 2a and skirt-shaped part 2b can become integral body with other approach, for example adhesive, screw etc.

Skirt-shaped part 2b can make with for example rigid plastics or the metal with high resistance to heat.Utilize such material, on surface of the work, do not stay the attraction mark.

The shape of housing 4 is similar in appearance to inverted cup.Upper end at housing 4 forms top 4a, and the lower end of housing 4 is open.Form through hole as air outlet slit 4b on the 4a of top, air is drawn out to housing 4 outsides from this outlet.

The major diameter part 22 of cylindrical member 2a is arranged in the housing 4.Therefore, an end of through hole 10 is opened in the housing 4.The neighboring of plate-shaped rubber 6 utilizes adhesive to be fixed on the following open end of housing 4 airtightly.

In plate-shaped rubber 6, be formed centrally through hole, and the inner edge of plate-shaped rubber 6 becomes integral body with the neighboring face that attracts part 2 airtightly.The inner edge of plate-shaped rubber 6 is clamped between the upper end of the major diameter part 22 of cylindrical member 2a and skirt-shaped part 2b, makes the inner edge of plate-shaped rubber 6 and the neighboring face that attracts part 2 become integral body.

According to such structure, plate-shaped rubber 6 partly and between the neighboring face of attraction part 2 extends and becomes integral body at the inner rim of housing 4.Also have, plate-shaped rubber 6 is as seal, and it is seal casinghousing 4 and attract space between the part 2 airtightly.Therefore, the inner space of housing 4 only is communicated with by air outlet slit 4b and through hole 10 with outside.Notice that plate-shaped rubber 6 can pass through other approach with attracting part 2 and housing 4, for example screw becomes integral body.

Constraint attracts the toroidal confinement part 28 of part 2 range of movement, is arranged on the lower open end of housing 4.The overall diameter of attaching means 28 is the diameter of housing 4 no better than; The interior diameter of attaching means 28 is less than the overall diameter that attracts part 2 major diameter parts 22.

By attaching means 28 is engaged with major diameter part 22, attract part can suffer restraints from the outwards outstanding scope of housing 4.

Notice that it is unrestricted that attaching means 28 is fixed to the device of housing 4.Attaching means 28 can be fixed on there, for example adhesive, screw etc. with proper device.For example, attaching means 28 and plate-shaped rubber 6 can be fixed with the screw that penetrates attaching means 28 and plate-shaped rubber 6.

Spring 8 is set in housing 4.The inner surface of one end in contact top 4a of spring 8; Other end contact attracts the upper surface of part 2 major diameter parts 22.According to such structure, spring 8 eternal bias voltages attract part 2, make to attract part 2 outwards outstanding from housing 4.

Owing to attract restrained 28 constraints of outstanding scope of part, show that in Fig. 1 attracting the position of part 2 is original position, wherein major diameter part 22 contiguity constraint spares 28.

The attractor A of present embodiment can use in factory etc.For example, attractor A can be fixed on and transport workpiece, for example liquid crystal panel on the conveyer belt.Conveyer belt has air attractor (not shown), and the air outlet slit 4b of attractor A is communicated with by the pipe (not shown) with the air attractor.The air attractor of conveyer belt attracts air, and workpiece is attracted device A and attracts and keep then.The driver element (not shown) that attractor A is transferred band moves, and makes workpiece can be transported to the destination.

One after the other, the method for utilizing attractor A to transport workpiece is explained with reference to Fig. 2.

At first, the driver element of conveyer belt moves attractor A until the attractor A surperficial S of contact workpiece slightly.

At this moment, even the surperficial S of workpiece tilts with respect to the contact portion 22 that attracts part on the original position (see figure 2), contact portion can adapt to and contact inclined surface suitably, because attract part 2 flexibly to be kept by plate-shaped rubber 6 and spring 8.Furtherly, when skirt-shaped part 2b contact workpiece, the skirt-shaped part 2b of attraction part 2 is defective work piece not.

Secondly, air attracts the unit to draw air from air outlet slit in attractor A.

Because the space between housing 4 and the attraction part 2 is to be sealed by plate-shaped rubber 6 airtightly, housing 4 inner spaces only are in communication with the outside by through hole 10 and air outlet slit 4b.

Therefore, air sucks from through hole 10.Produce negative pressure then in the concave part 16 of skirt-shaped part 2b, this part 16 is communicated with through hole 10.By producing negative pressure, be attracted part and hold with surperficial S that contact portion 12 contacted and sealed the workpiece of concave part 16.

Secondly, driver element moves attractor A and upwards mentions workpiece and transport attractor A and arrive the destination with workpiece.

When workpiece is upwards mentioned, attract part 2 to be pulled down by workpiece weight.But, major diameter part 22 engages with attaching means 28, and the lower limit motion that attracts part 2 is restricted.Therefore, plate-shaped rubber 6 does not damage and is extended excessively by workpiece weight.

After the position of achieving the goal, the air attractor stops to attract air, makes negative pressure disappearance in housing 4, through hole 10 and the concave surface 16 and attractor A release workpiece.Then, driver element makes attractor A remove from workpiece.

Workpiece can be transported to destination locations.After discharging workpiece, attract part 2 promptly owing to the elasticity of spring 8 is returned initial position.Attractor A turns back to next and transports operating position.Conveyer belt repeats aforesaid operations so that transport a plurality of workpiece.

In the above-described embodiments, attractor A has the simple structure that comprises plate-shaped rubber 6.Therefore, can be perpendicular to the vertical dimension of the attractor A of surface of the work S direction size less than the size of traditional attractor with bellows part.

Below will explain other embodiment.

In embodiment described above, plate-shaped rubber 6 flexibly keeps attracting part 2 and seal casinghousing 4 and attract space between the part 2 airtightly.The seal in space can be provided with individually between seal casinghousing 4 and the attraction part 2 airtightly.

In the above-described embodiments, plate-shaped rubber 6 is fixed on the lower end of housing 4, but the fixed position is not limited to the lower end.For example, plate-shaped rubber 6 can be fixed on top 4a and attract on the part 2.

In the above-described embodiments, hard material is as the contact 12 that attracts part 2.Also have, the present invention can be applicable on the attractor that its contact makes with soft material.Under the sort of situation, the size of attractor can be less, and attract part can adapt to the surface of workpiece suitably.In the above-described embodiments, attractor A is used for transmitting workpiece in factory.Attractor of the present invention can be widely used in many equipment and machines that are used to attract and keep the attraction part of workpiece that have.

The present invention can implement and the unlikely spirit that departs from its fundamental characteristics with other form.Therefore present embodiment is thought and is illustrative rather than restrictive in every respect, scope of the present invention is pointed rather than limited by top explanation by claims, and all fall into the variation that claim equates scope and meaning and therefore include interior.

Claims

1. attractor comprises:

Attract part, comprise through hole, suck from the one end by this through hole air, and contact portion, this part is arranged on the other end of through hole and contact and maintenance workpiece when attracting air;

Housing, an end of through hole opens in this housing, and described housing has air outlet slit, and the air that attracts by through hole is drawn out to the external world from this outlet, and described housing allows that described attractions partly inwardly shrinks back and stretch out; With

The plate-shaped elastic component is connected in described housing and described attraction part, makes described attraction part become integral body with described housing.

2. according to the described attractor of claim 1, it is characterized in that described plate-shaped elastic component is connected in the inner rim part and the described outer peripheral face that attracts part of described housing.

3. according to the described attractor of claim 1, it is characterized in that described plate-shaped elastic component seals the space between described housing and the described attraction part airtightly.

4. according to the described attractor of claim 1, it is characterized in that the contact portion of described at least attraction part is used than the harder material of described plate-shaped elastic component and made.

5. according to the described attractor of claim 1, it is characterized in that, also comprise being used for the described attraction part of bias voltage from the outward extending bias piece of described housing.

6. according to the described attractor of claim 1, it is characterized in that, also comprise being used to retrain the described device that attracts part to extend from described housing.