GB2261045A - Guard system - Google Patents
Guard system Download PDFInfo
- Publication number
- GB2261045A GB2261045A GB9123285A GB9123285A GB2261045A GB 2261045 A GB2261045 A GB 2261045A GB 9123285 A GB9123285 A GB 9123285A GB 9123285 A GB9123285 A GB 9123285A GB 2261045 A GB2261045 A GB 2261045A
- Authority
- GB
- United Kingdom
- Prior art keywords
- component supply
- area
- guard
- operating area
- machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
- F16P3/08—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body in connection with the locking of doors, covers, guards, or like members giving access to moving machine parts
- F16P3/10—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body in connection with the locking of doors, covers, guards, or like members giving access to moving machine parts in which the operation of locking the door or other member causes the machine to start
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
- F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
- F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
- F16P3/144—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using light grids
Abstract
A guard system for an electric component placement machine which comprises an operating area 4, at least two independently movable component supply sections moveable between their associated, parking areas 6, 10 and the operating area. The guard system comprises (a) a safety system 24, 26, 24', 26', associated with the parking areas; (b) a guard 14 which controls access to the operating area of the machine; (c) means, to determine whether the component supply section is parked; (d) control means to disable power supply to the parked area when the safety system associated with the area has detected entry and to disable the operation of the machine when the guard system controlling access to the operating area or the safety system associated with an unparked supply section is penetrated, and (e) guards between each of the parking areas and the operating area, which allow the component supply sections to be moved from the parking areas to the operating area but which shields the parking area from the operating area when the associated component supply section is parked. <IMAGE>
Description
GUARD SYSTEM
The present invention relates to a system for guarding a machine, and to a screen device which is adapted to form part of that system.
The guard system and screen device are particularly suitable for guarding an electronic component placement machine of the type in which a plurality of components are assembled on a suitable substrate. A number of systems have been proposed for handling the components to be placed on a substrate and many of these have proposed the use of pick-up heads having a suitable tool by which a component may be picked up.The tools have been cf various types, depending to some extent on the components to be handled; for example the tools may mechanically grip the components or may use suction or a magnetic system to retain a component on the tool of the pick-up head when the component is removed from a suitable component supply means for delivery elsewhere for example to a suitable placement position where the component may be placed on a substrate e.y. a printed circuit board.
In the mounting of components on substrates especially placement of electrical or electronic components on printed circuit boards, in particular using surface mounting techniques, it is important to present a variety of components for use rapidly. Components are conveniently supplied in appropriately constructed magazines, many of which are already known.One known type of magazine which is especially convenient for the supply of components to a component placement machine for use in surface mounting is known as a tape feeder: in this type of magazine, components are housed in pockets equally spaced along a tape which is wound around a suitable reel: whenever it is desired to use a component from such a magazine the tape is indexed through a feed step (equivalent to the spacing between one of the pockets and the next adjacent pocket) to present a component at a transfer position of the magazine where the component may be transferred to other operating instrumentalities, for example a pick-up head of a component placement machine.
In order to minimise breaks in production it is important that when a supply of components in a magazine is exhausted, the supply can readily be replenished. For many magazines this can be accomplished by removing a magazine and replacing it by a new magazine. When using tape feeders, where the reels can be replaced, the time necessary to remove an old reel, replace it by a new reel and thread the tape correctly through the feeding instrumentalities of the magazine is time consuming. Thus even tape feeders may be more appropriately exchanged than reloaded in situ on component supply means.Furthermore, should it be desired to change components to be supplied for a particular purpose, for example when it is wished to place components on a printed circuit board of different design using some different components, it may be necessary to exchange a number of magazines to provide appropriate components, although preferably the component supply means mounts a sufficient number of magazines to provide components for a number of different substrates for example a variety of relatively simple printed circuit boards as well as one or more complex substrates.Indeed, where a sufficiently substantial change in the purpose for which components are to be supplied is necessary, it may in some cases be preferable to exchange a whole component supply means, removing the original supply means and replacing it by a similar supply means having magazines supplying a whole range of different components.
In a new design of component placement machine which has recently become available the component supply means has been divided into two separate movable sections, mounted on a split slide. While one component supply section is in use, the other is in a "park" position, where the operator can, for example, change components or replenish individual magazines without affecting the operation of the machine.
In the systems proposed, the two supply sections are either driven by two lead screws, with two moving motors, or by a single lead screw and nut, which can be latched into either of the supply sections.
In the older design of machine, in which the operation of the machine had to be suspended while the component supply means was replaced or replenished, this replacing or replenishment could be carried out without risk of personal injury to the operator, since the machine operation was suspended. It was only necessary to provide the machine with a relatively simple guard system, since there was no requirement for an operator to be able to approach any potentially dangerous part of the machine while the machine remained in operation.
In contrast to this, in the machine having the split slide component feed it is an essential feature of this type of machine that the operator should be able to service one slide, the parked slide, while the machine is in operation and taking components from the other slide, the operative slide.
It is an object of the present invention to provide a guard system for an electronic component placement machine of the type which comprises a first and a second component supply means, which guard system allows access to an inoperative part of the machine during operation of the machine.
It is a further object of the invention to provide a screen device which is adapted to form part of such a guard system.
The invention provides a guard system for an electronic component placement machine which comprises an operating area, component supply means divided into at least two independently movable component supply sections, a parking area for each of the component supply sections, and means for driving each of the component supply sections between its parking area and the operating area, characterised in that the guard system comprises
(a) a safety system, associated with the parking area of each of the component supply sections, which controls access to a servicing area for servicing the component supply section when it is parked;
(b) a guard system which controls access to the operating area of the machine;
(c) means, associated with each component supply section to determine whether the component supply section is in the parked position;;
(d) control means to disable the parked slide when the safety system associated with that slide has detected entry into the servicing area which it controls, and to disable the operation of the machine when the guard system controlling access to the operating area or the safety system associated with an unparked slide is penetrated, and
(e) guard means between each of the parking areas and the operating area for the machine, which guard means allows the component supply section to be moved from the parking area to the operating area but which shields the parking area from the operating area when the associated component supply section is in the parked position.
The safety system (a) may be any suitable safety system, for example a conventional door system which detects when an operator opens the doors, and is reset when the operator leaves the guarded area and the doors are closed, or a photo-electric curtain system, which is triggered by an operator entering the guarded area, and has to be reset from outside the guarded area.
The guard system (b) may similarly be any suitable guard system, for example a fence-type guard system.
The invention also provides guard means for an electronic component placement machine which comprises an operating area, component supply means divided into at least two independently movable component supply sections, a parking area for each of the component supply sections, and means for driving each of the component supply sections between its parking area and the operating area, characterised in that the guard means is located between a parking area and the operating area for the machine, and comprises
(a) a plate for attachment directly or indirectly to the machine, adapted to separate the operating area from the parking area and provided with an aperture through which a component supply section, loaded with component supply magazines can pass, and
(b) a screen mounted on and movable with the component supply section, which is adapted te close the aperture in the plate when the component supply section is in the parked position.
The invention will now be further described with reference to the accompanying drawings, in which
Figure 1 is a perspective view of an embodiment of an electronic component placement machine with a guard system; with component supply sections removed, and
Figure 2 is an end view, partially broken away, of the machine of Figure 1 with a component supply section in place.
As can be seen from Figure 1, an electronic component placement machine 2 comprises an operating area 4, a parking area 6 with associated service area 8 for a first component supply section (not shown) and a second parking area 10 with associated service area 12 for a second component supply section (not shown).
The operating area 4 is guarded by means of a fence type security system 14 which comprises a door 16 attached to wall portions 18. Switch means (not shown) are provided to determine whether the door 16 is open or closed.
For each of the parking areas 6, 10 and associated service areas 8, 12, a similar photo-electric security system 20, 22 is provided. Each of these systems 20, 22 comprises a pair of posts 24, 26,o 24',26' between which a photo-electric beam is passed, forming a light curtain.
A guide rail 28 extends the whole length of the machine, between the left hand (as viewed) end of the parking area 6 and the right hand (as viewed) end of the parking area 10 Side walls 30, 32 of the operating area are each provided with an aperture 34 which is so dimensioned that a tape magazine (not shown) located on a component supply section (not shown) mounted on the guide rail 28 can pass through that aperture 34.
A switch (not shown) is provided to determine whether the individual component supply section is parked or not parked
Protective screens 36 are provided to shield those sides of the parking and service areas to which access is not required.
As can also be seen from Figure 2, the side wall 30 comprises an aperture 34. A screen 38 is shaped to close the aperture 34 and is mounted on a component supply section 40. A number of tape magazines, an example of which is shown at 42, are mounted on and movable with the component supply section 40.
In operation, a first component supply section 40 is parked within the parking area 6 and a second component supply section 40 is driven to the operating area 4 where the components loaded on the various tape magazines are selectively taken from the tapes and placed on, for example, a printed circuit board. During this operation, the component supply section is rapidly driven between different positions so that the magazine containing the required components is driven to the position at which the tool of the placement machine can pick up a component
At the same time, an operator can enter the service area 8 associated with the parking area 6 and carry out necessary resupply, replacement or other maintenance of the magazines in the component supply section parked in that area.The power supply to this parking area 6 is disabled when the operator passes through the light curtain extending between the posts 24, 26 but the machine 2 continues to operate. When the operator is working in the service area 8, particularly in the region of that service area close to the side wall 30 he is protected from injury due to the movement of the non-parked component supply section of the machine, by the screen 38 closing the aperture 34. He is also prevented from leaning through the aperture 34 to attempt to carry out any servicing in the operating area 4, when the operator leaves the service area 8 he passes through the light curtain again and then resets the machine by means of a reset switch operable from outside the service area. This reset switch is suitably operable by a removable key which the operator retains on his person when he is inside the service area 8.
In contrast to this, if an operator attempts to enter the operating area 4 or service area 12 while the component supply section associated with that area is not parked, then the power supply to the whole machine is disable and the machine ceases to operate.
Claims (7)
1. A guard system for an electric component placement machine which comprises an operating area, component supply means divided into at least two independently movable component supply sections, a parking area for each of the component supply sections, and means for driving each of the component supply sections between its parking area and the operating area, characterised in that the guard system comprises
(a) a safety system, associated with the parking area of each of the component supply sections, which controls access to a servicing area for servicing the component supply section when it is parked;
(b) a guard system which controls access to the operating area of the machine;
(c) means, associated with each component supply section to determine whether the component supply section is in the parked position;;
(d) control means to disable-the parked slide when the safety system associated with that slide has detected entry into the servicing area which it controls, and to disable the operation of the machine when the guard system controlling access to the operating area or the safety system associated with an unparked slide is penetrated, and
(e) guard means between each of the parking areas and the operating area for the machine, which guard means allows the component supply section to be moved from the parking area to the operating area but which shields the parking area from the operating area when the associated component supply section is in the parked position.
2. A guard system according to claim 1, characterised in that the safety system (a) comprises a door system.
3. A guard system according to claim 1, characterised in that the safety system (a) comprises a photo-electric curtain system.
4. Guard means for an electronic component placement machine which comprises an operating area, component supply means divided into at least two independently movable component supply sections, a parking area for each of the component supply sections, and means for driving each of the component supply sections between its parking area and the operating area, characterised in that the guard means is located between a parking area and the operating area for the machine, and comprises
(a) a plate for attachment directly or indirectly to the machine, adapted to separate the operating area from the parking area and provided with an aperture through which a component supply section, loaded with component supply magazines can pass, and
(b) a screen mounted on and movable with the component supply section, which is adapted to close the aperture in the plate when the component supply section is in the parked position.
5. A guard system according to claim 1, characterised in that the guard means (e) of that system is a guard means according to claim 2.
6. A guard system substantially as herein described with reference to the accompanying drawings.
7. A guard means substantially as herein described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9123285A GB2261045A (en) | 1991-11-02 | 1991-11-02 | Guard system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9123285A GB2261045A (en) | 1991-11-02 | 1991-11-02 | Guard system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9123285D0 GB9123285D0 (en) | 1991-12-18 |
| GB2261045A true GB2261045A (en) | 1993-05-05 |
Family
ID=10703966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9123285A Withdrawn GB2261045A (en) | 1991-11-02 | 1991-11-02 | Guard system |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2261045A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009046910A1 (en) | 2007-10-05 | 2009-04-16 | Krones Ag | Bottle treatment system having safety unit |
| WO2022028025A1 (en) * | 2020-08-03 | 2022-02-10 | 山东华滋自动化技术股份有限公司 | Portable safe material collection apparatus for circular knife die cutting equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1577138A (en) * | 1977-07-26 | 1980-10-22 | Ihw Eng Ltd | Machine guards |
-
1991
- 1991-11-02 GB GB9123285A patent/GB2261045A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1577138A (en) * | 1977-07-26 | 1980-10-22 | Ihw Eng Ltd | Machine guards |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009046910A1 (en) | 2007-10-05 | 2009-04-16 | Krones Ag | Bottle treatment system having safety unit |
| CN101815892A (en) * | 2007-10-05 | 2010-08-25 | 克朗斯股份公司 | Bottle treatment system having safety unit |
| US8272495B2 (en) | 2007-10-05 | 2012-09-25 | Krones Ag | Bottle treatment system having safety unit |
| CN101815892B (en) * | 2007-10-05 | 2013-05-22 | 克朗斯股份公司 | Bottle treatment device having safety unit |
| WO2022028025A1 (en) * | 2020-08-03 | 2022-02-10 | 山东华滋自动化技术股份有限公司 | Portable safe material collection apparatus for circular knife die cutting equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9123285D0 (en) | 1991-12-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |