GB1589696A - Handling devices - Google Patents
Handling devices Download PDFInfo
- Publication number
- GB1589696A GB1589696A GB4378777A GB4378777A GB1589696A GB 1589696 A GB1589696 A GB 1589696A GB 4378777 A GB4378777 A GB 4378777A GB 4378777 A GB4378777 A GB 4378777A GB 1589696 A GB1589696 A GB 1589696A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bellows
- ring
- gripper
- secured
- gas
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
- B25J19/0075—Means for protecting the manipulator from its environment or vice versa
- B25J19/0083—Means for protecting the manipulator from its environment or vice versa using gaiters
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F7/00—Shielded cells or rooms
- G21F7/06—Structural combination with remotely-controlled apparatus, e.g. with manipulators
- G21F7/061—Integrated manipulators
Landscapes
- Engineering & Computer Science (AREA)
- Robotics (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Manipulator (AREA)
- Pivots And Pivotal Connections (AREA)
- Diaphragms And Bellows (AREA)
- Joints Allowing Movement (AREA)
Description
(54) HANDLING DEVICES
(71) We, EUROPEAN ATOMIC ENERGY
COMMUNITY (EURATOM), of European Center
Kirchberg, Luxembourg, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:
This invention relates to handling devices.
Remotely-controlled telescopic arms provided with grippers, such as are used in hermetically sealed radioactive hot cells, must be sealed against the cell wall, especially to prevent radioactive particles or gases from leaving the cell.
This can be done, for example, by sealing the moving parts and the housing of the telescopic arm at the place where it extends through the cell wall. The disadvantage of this method is that the gripper arms have to be replaced periodically as a result of inevitable contamination, and this increases the amount of time required for dismantling or assembly and the length of the inoperative periods of the system.
Another method of sealing a telescopic arm is to enclose it in a flexible bellows, for example of rubber or plastics, which screens the arm against radioactive radiation and contamination.
This method in itself is relatively simple and cheap, but has considerable disadvantages in operation owing to the sensitivity of the bellows and the impairment of visibility resulting from the large overall bellows diameter. In the case of multiple telescopic arms there may also be an undesirable reduction in the sensitivity of the arm since its moving parts move with substantial friction against the asymmetrically contracted bellows. This may also damage the bellows.
Additional damage may be caused since the bellows, in the case of both a single and a multiple telescopic arm, contracts non-uniformly and remains suspended from the telescopic units, and may thus tear when the unit is extended.
The aforementioned disadvantages are largely obviated by a handling device comprising the bellows seal system for telescopic arms according to the invention, as hereinafter exemplified.
According to the present invention there is
provided a handling device having a gripper attached to an arm, the arm comprising a plurality of members which are adapted to telescope with one another, wherein each of the members is covered and protected from gaseous or particulate contamination by an individual flexible bellows unit.
Preferably each bellows unit is secured circumferentially in gas-tight manner to a ring, which is itself secured to that end of a member at the point at which the member which the bellows unit protects telescopes into its neighbouring member. It is also preferred that each bellows unit and corresponding ring are releasable integrally from the corresponding member. For this purpose the ring is conveniently secured to the member by a rotatable joint comprising a plurality of balls engaging a ball race.
In order to improve the visibility of the gripper to the operator one or more of the bellows units can be of smaller diameter at its outer end than at its inner end.
In a handling device according to the present invention only the bellows portion corresponding to the telescopic member in operation is retracted or extended, instead of the entire bellows as in known systems. This reduces the total mass of bellows units which are moving, increases the sensitivity and accuracy of the telescopic arm and reduces the friction of the bellows on the telescopic unit. In short, the device according to the invention, as exemplified hereafter, substantially eliminates damage to the bellows. Another advantage is that the diameter of each bellows portion can be varied in accordance with the diameter of its associated telescopic member so as to provide a close fit thereover, thus improving visibility for the operator.
According to another preferred feature of the invention, the end of the bellows unit which is adjacent the gripper is secured in a gas-tight manner to that end of the corresponding member adjacent the gripper, for example by clamping the end of the bellows unit to a bell-shaped protective cap attached to the gripper. Furthermore, the opposite end of the gastight column of bellows unit may be rotatably secured to a protective cap attached to the stationary part of the associated telescopic member and is in turn connected by a ring and
clamp to a stationary gas-tight protective hood.
The bell-shaped protective cap ensures that when the outermost telescopic member is retracted, the corresponding bellows portion cannot move so far over the gripper as to hinder its operation and risk the bellows being damaged. The ends of the bellows column can be sealed in a simple manner by the gas-tight clamping of the bellows over the gripper at one end thereof, and by securing in a gas-tight manner to the stationary hood at the other end thereof.
An embodiment of the invention will now be described in detail by way of example with reference to the accompanying drawings in which:
Figure 1 is a diagram of a handling device in accordance with the invention having two bellows portions on a double telescopic arm, and
Figure 2 is an enlarged view, partly in crosssection, of part of the device shown in Figure
1 and showing in particular, the junction between the bellows portions.
Figure 1 shows two telescopic members 1, 2 surrounded by bellows portions 3, 4 shown in cross-section. Bellows portions 3, 4 are secured together in gas-tight manner by a ring 5, the two bellows portions thus forming a column.
Portion 3 of the bellows column, at its end adjacent the gripper 6, is clipped in gas-tight manner to a bell-shaped protective cap 7. At the end remote from gripper 6, the bellows column is secured in gas-tight manner by ring 8 to a stationary hood 9. Bellows portion 3 is held against gravitational force by ring 5, which is rotatably secured to a protective cap 11 by a joint 10 comprising a plurality of ball lOa engag ing a ball race, which can be released by remote control. Cap 11 also contains mechanical and electrical operating components (not shown) for the telescope and guides them so that they do not touch the bellows portions. The protective cap 7 (shown in Figure 2) serve the same same supporting purpose.
The end of the bellows portions 3 which are adjacent the gripper 6 has a diameter smaller than the end which is adjacent ring 5. This reduces the mass of bellows which is in motion when the telescope is operated and also improves visibility near the gripper.
Figure 2 includes a cross-section showing a ring disposed at the junction between the two bellows portions. Rings 5 and 8 have identical grooves 8a on their outer periphery, along which the ends of bellows portions 3, 4 or stationary hood are pushed and secured by hose clips (not shown) of suitable diameter. The rotatable joint 10 is secured as follows. The balls, which bear resiliently on the periphery of the protective cap 11, engage a ball race 8b on the inner surface of ring 8. Ring 8 can for example be removed from cap 11 by a remotelycontrolled tool (not shown), whereupon balls
1 Oa are forced radially back so as to release
the ring.
The bell-shaped protective cap 7 is designed
to ensure that when the telescopic unit is re
tracted bellows portion 3 cannot move over
housing 6a or the gripper 6 shown in Figure 1.
In the embodiment illustrated the protec
tive cap 7 is made of a suitable plastics mater
ial and is secured by a hose clip (not shown) to
the gripper housing 6a and also to the end of
bellows portion 3.
The groove 12 in the housing 6a increases
the sealing-tightness of the junction by giving
a better purchase to the end of the bellows.
WHAT WE CLAIM IS:
1. A handling device having a gripper
attached to an arm, the arm comprising a plura
lity of members which are adapted to telescope
with one another, wherein each of the mem
bers is covered and protected from gaseous or
particulate contamination by an individual
flexible bellows unit.
2. A device as claimed in Claim 1 wherein
each bellows unit is secured circumferentially
in gas-tight manner to a ring.
3. A device as claimed in Claim 2 wherein
the ring is secured to that end of a member at
the point at which the member which the bel
lows unit protects telescopes into its neigh
bouring member.
4. A device as claimed in Claim 3 wherein
each bellows unit and corresponding ring are
releasable integrally from their corresponding
member.
5. A device as claimed in Claim 4 wherein
the ring is secured to the member by a rotat
able joint comprising a plurality of balls engag
ing a ball race.
6. A device as claimed in any one of the
preceding claims wherein the end of the bel
lows unit adjacent the gripper is secured in a
gas-tight manner to that end of the correspon
ding member adjacent the gripper.
7. A device as claimed in any one of the
preceding claims wherein the diameter of each
bellows unit is varied in accordance with the
diameter of its corresponding member so as to
provide a close fit thereover.
8. A handling device as claimed in Claim 1
substantially as hereinbefore described with
reference to and as illustrated in the accom
panying drawings.
BOULT, WADE & TENNANT
27 Furnival Street,
London EC4A 1PQ.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (8)
1 Oa are forced radially back so as to release
the ring.
The bell-shaped protective cap 7 is designed
to ensure that when the telescopic unit is re
tracted bellows portion 3 cannot move over
housing 6a or the gripper 6 shown in Figure 1.
In the embodiment illustrated the protec
tive cap 7 is made of a suitable plastics mater
ial and is secured by a hose clip (not shown) to
the gripper housing 6a and also to the end of
bellows portion 3.
The groove 12 in the housing 6a increases
the sealing-tightness of the junction by giving
a better purchase to the end of the bellows.
WHAT WE CLAIM IS:
1. A handling device having a gripper
attached to an arm, the arm comprising a plura
lity of members which are adapted to telescope
with one another, wherein each of the mem
bers is covered and protected from gaseous or
particulate contamination by an individual
flexible bellows unit.
2. A device as claimed in Claim 1 wherein
each bellows unit is secured circumferentially
in gas-tight manner to a ring.
3. A device as claimed in Claim 2 wherein
the ring is secured to that end of a member at
the point at which the member which the bel
lows unit protects telescopes into its neigh
bouring member.
4. A device as claimed in Claim 3 wherein
each bellows unit and corresponding ring are
releasable integrally from their corresponding
member.
5. A device as claimed in Claim 4 wherein
the ring is secured to the member by a rotat
able joint comprising a plurality of balls engag
ing a ball race.
6. A device as claimed in any one of the
preceding claims wherein the end of the bel
lows unit adjacent the gripper is secured in a
gas-tight manner to that end of the correspon
ding member adjacent the gripper.
7. A device as claimed in any one of the
preceding claims wherein the diameter of each
bellows unit is varied in accordance with the
diameter of its corresponding member so as to
provide a close fit thereover.
8. A handling device as claimed in Claim 1
substantially as hereinbefore described with
reference to and as illustrated in the accom
panying drawings.
BOULT, WADE & TENNANT
27 Furnival Street,
London EC4A 1PQ.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU76066A LU76066A1 (en) | 1976-10-25 | 1976-10-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1589696A true GB1589696A (en) | 1981-05-20 |
Family
ID=19728395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4378777A Expired GB1589696A (en) | 1976-10-25 | 1977-10-20 | Handling devices |
Country Status (9)
Country | Link |
---|---|
BE (1) | BE859108A (en) |
DE (1) | DE2745753A1 (en) |
DK (1) | DK445677A (en) |
FR (1) | FR2368342A1 (en) |
GB (1) | GB1589696A (en) |
IE (1) | IE45710B1 (en) |
IT (1) | IT1090169B (en) |
LU (1) | LU76066A1 (en) |
NL (1) | NL7710905A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1985001496A1 (en) * | 1983-10-03 | 1985-04-11 | American Telephone & Telegraph Company | Protective robot covering |
US4904514A (en) * | 1988-09-13 | 1990-02-27 | Kimberly-Clark Corporation | Protective covering for a mechanical linkage |
US11007638B2 (en) | 2018-12-20 | 2021-05-18 | Honda Motor Co., Ltd. | Telescoping support robot and methods of use thereof |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021104378A1 (en) | 2021-02-24 | 2022-08-25 | Dürr Systems Ag | Protective cover for a robot wrist axis |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1344356A (en) * | 1962-10-04 | 1963-11-29 | Commissariat Energie Atomique | Removable clamp |
FR1427907A (en) * | 1964-12-29 | 1966-02-11 | Commissariat Energie Atomique | Improvements to sealing bellows and their manufacturing process |
US3507163A (en) * | 1968-11-08 | 1970-04-21 | Central Research Lab Inc | Sealed manipulator |
US3712481A (en) * | 1971-12-23 | 1973-01-23 | Mc Donnell Douglas Corp | Actuator |
-
1976
- 1976-10-25 LU LU76066A patent/LU76066A1/xx unknown
-
1977
- 1977-09-28 BE BE1008401A patent/BE859108A/en unknown
- 1977-10-05 NL NL7710905A patent/NL7710905A/en not_active Application Discontinuation
- 1977-10-07 IE IE205377A patent/IE45710B1/en unknown
- 1977-10-07 DK DK445677A patent/DK445677A/en not_active Application Discontinuation
- 1977-10-07 DE DE19772745753 patent/DE2745753A1/en not_active Withdrawn
- 1977-10-19 IT IT5148277A patent/IT1090169B/en active
- 1977-10-20 FR FR7731633A patent/FR2368342A1/en active Granted
- 1977-10-20 GB GB4378777A patent/GB1589696A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1985001496A1 (en) * | 1983-10-03 | 1985-04-11 | American Telephone & Telegraph Company | Protective robot covering |
EP0138461A2 (en) * | 1983-10-03 | 1985-04-24 | AT&T Corp. | Protective robot covering |
EP0138461A3 (en) * | 1983-10-03 | 1985-05-29 | AT&T Corp. | Protective robot covering |
US4904514A (en) * | 1988-09-13 | 1990-02-27 | Kimberly-Clark Corporation | Protective covering for a mechanical linkage |
US11007638B2 (en) | 2018-12-20 | 2021-05-18 | Honda Motor Co., Ltd. | Telescoping support robot and methods of use thereof |
Also Published As
Publication number | Publication date |
---|---|
NL7710905A (en) | 1978-04-27 |
FR2368342B1 (en) | 1980-06-20 |
IT1090169B (en) | 1985-06-18 |
FR2368342A1 (en) | 1978-05-19 |
DK445677A (en) | 1978-04-26 |
DE2745753A1 (en) | 1978-04-27 |
IE45710L (en) | 1978-04-25 |
LU76066A1 (en) | 1977-05-18 |
BE859108A (en) | 1978-01-16 |
IE45710B1 (en) | 1982-11-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |