CA1146993A - Device for handling steel bars and sections arranged in planar bundles - Google Patents
Device for handling steel bars and sections arranged in planar bundlesInfo
- Publication number
- CA1146993A CA1146993A CA000366331A CA366331A CA1146993A CA 1146993 A CA1146993 A CA 1146993A CA 000366331 A CA000366331 A CA 000366331A CA 366331 A CA366331 A CA 366331A CA 1146993 A CA1146993 A CA 1146993A
- Authority
- CA
- Canada
- Prior art keywords
- electromagnets
- arms
- respect
- support frame
- tubes
- 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
Abstract
ABSTRACT OF THE DISCLOSURE
A device for handling steel bars and sections, in particular tubes, arranged in planar bundles, comprises a support frame to be hooked to a hoisting apparatus and having pivotedly mounted thereto at least two pairs of bearing and fastening arms around a first portion thereof.
At least one pair of planar electromagnets, substantially parallel to the frame and movable along the first portion of the arms in a direction perpendicular to the planar bundle of articles to be handled, is provided with slits for moving through metallic blocks in order to attract or release the articles to be handled. There are also provided cables for lifting and lowering the electromagnets with respect to the support frame.
A device for handling steel bars and sections, in particular tubes, arranged in planar bundles, comprises a support frame to be hooked to a hoisting apparatus and having pivotedly mounted thereto at least two pairs of bearing and fastening arms around a first portion thereof.
At least one pair of planar electromagnets, substantially parallel to the frame and movable along the first portion of the arms in a direction perpendicular to the planar bundle of articles to be handled, is provided with slits for moving through metallic blocks in order to attract or release the articles to be handled. There are also provided cables for lifting and lowering the electromagnets with respect to the support frame.
Description
BACKGROUND OF T~IE INVENTION
The present invention relates to a device for handling steel bars and sections, in particular tubes, arranged in planar bundles.
It is known that the handling of steel bars and sections, such as tubes, shows a considerable number of inconveniences, in particular with respect to the safety of the handling operators and due to the noise caused in the environment.
- At present elongated metallic articles as above-mentioned are moved from a store to another or during the loading operation or discharging from a transportation means sub-stantially according to two dlfferent methods.
A first manner of moving elongated steel sections is based on the utilization of an electromagnet carried by a usual hoisting apparatus which attracts and keeps at-tracted one or more pieces being preferably bundled, during the steps of taking and moving, and lets them drop at the place of arrival.
Pivotable safety arms have been then coupled to the electromagnet, which are vertically movable with respect to the electromagnet in order to prevent the pieces from drop-ping and to keep them hold even in case of power failure and incidental deenergization of the electromagnet. It is known that, according to this type of procedure, further personnel on the ground is required to properly arranye the metallic elements, in addltion to the operator of the hoisting apparatus.
Another method of handling elongated metallic axticles includes bundling a certain number of pieces together by means of blndlng ropes, thus creatlng a bundle of art~lcles
The present invention relates to a device for handling steel bars and sections, in particular tubes, arranged in planar bundles.
It is known that the handling of steel bars and sections, such as tubes, shows a considerable number of inconveniences, in particular with respect to the safety of the handling operators and due to the noise caused in the environment.
- At present elongated metallic articles as above-mentioned are moved from a store to another or during the loading operation or discharging from a transportation means sub-stantially according to two dlfferent methods.
A first manner of moving elongated steel sections is based on the utilization of an electromagnet carried by a usual hoisting apparatus which attracts and keeps at-tracted one or more pieces being preferably bundled, during the steps of taking and moving, and lets them drop at the place of arrival.
Pivotable safety arms have been then coupled to the electromagnet, which are vertically movable with respect to the electromagnet in order to prevent the pieces from drop-ping and to keep them hold even in case of power failure and incidental deenergization of the electromagnet. It is known that, according to this type of procedure, further personnel on the ground is required to properly arranye the metallic elements, in addltion to the operator of the hoisting apparatus.
Another method of handling elongated metallic axticles includes bundling a certain number of pieces together by means of blndlng ropes, thus creatlng a bundle of art~lcles
-2~
g~
which is subsequently moved as a single block on bearing arms or by hanging hooks of a hoisting apparatus, such as a crane or a conventional self-propelled means.
Both the above-mentioned transportation systems have the drawback of being excessively noisy in the discharge operation owing to the mutual collisions and the rolling of the pieces, which may also cause damages to the surface of the pieces being dischar~ed. These systems are par-ticu-larly disadvantageous when piling up elongated metallic ele-ments~ This operation must be effected in layers, eachlayer of articles being separated by those disposed there-under by means of wooden spacers or girders to the purpose of a proper arrangement of the articles and to obtain a suffi~
cient gap for the insertion of the binding ropes or bearing arms of the hoisting apparatus. The piling up of these elongated metallic elements requires further personnel for inserting and removing the spacers from the pile of elements and, in case of breakage of the spacers, falls or displace-ments of the articles may occur, which are harmful to the material and disadvantageous for further possible transpor-tations.
Summar~ Of The Invention It is the object of the present invention to provide a device for handling steel bars or tubes and structural steel which allows to overcome the above-mentioned inconveniences at the same time reducing as much as possible the sources of noise, while eliminating the need of further personnel in addition to the crane operator and allowing the safe transportation of tubes without the danger of incidental falls thereof.
The device of the invention comprises: a support frame to be hooked to a hoisting apparatus; at least two pairs ~' ~.
.
of bearing and fastening arms, which are pivotally mounted to said frame; at least one pair of planar electromagnets, movable wlth respect to said arms and provided with slits through which metallic blocks may project and caused to be retracted in order to attract a plurality of pieces to be transported in the form of a layer; and means for lifting and lowering said electromagnets with respect to the support frame.
In the following description of an illustrative embodiment of the device, particular reference will be made to the hand-ling of circular cross-section steel tubes, which show the highest number of the mentioned inconveniences. However it should be obvious that the invention may also be applied to articles of ferromagnetic metal, in particular of steel, having a different configuration, such as bars, rods, sheets or plates of reduced width and in general having an elongated shape.
Brief Description of _ e Drawinys The device according to the present invention will be more fully understood by the following detailed description of an embodiment, given by way of a non-limiting example, with reference to the annexed drawings, in which:
FIGURE 1 is a perspective view showing the device with open arms during an operation of taking up or laying down a layer of tubes;
FIGURE 2 is a perspective view of the same device with closed arms during a transportation step; and FIGURE 3 is a cross-section view of an electromagnet at the moment of coming into contact with a layer of tubes to be handled.
Deta_led Description of the Preferred Embodiment With particular referenceto Figs. 1 and 2, the device of the in~ention comprises a supporting f~ame, generally indlcated . ~
.~,"
1, being connected to a hoisting apparatus which may be a common crane, such as of the known bridge type, thus not being illustrated in detail.
Again with reference to Figs. 1 and 2, and also to Fig.
g~
which is subsequently moved as a single block on bearing arms or by hanging hooks of a hoisting apparatus, such as a crane or a conventional self-propelled means.
Both the above-mentioned transportation systems have the drawback of being excessively noisy in the discharge operation owing to the mutual collisions and the rolling of the pieces, which may also cause damages to the surface of the pieces being dischar~ed. These systems are par-ticu-larly disadvantageous when piling up elongated metallic ele-ments~ This operation must be effected in layers, eachlayer of articles being separated by those disposed there-under by means of wooden spacers or girders to the purpose of a proper arrangement of the articles and to obtain a suffi~
cient gap for the insertion of the binding ropes or bearing arms of the hoisting apparatus. The piling up of these elongated metallic elements requires further personnel for inserting and removing the spacers from the pile of elements and, in case of breakage of the spacers, falls or displace-ments of the articles may occur, which are harmful to the material and disadvantageous for further possible transpor-tations.
Summar~ Of The Invention It is the object of the present invention to provide a device for handling steel bars or tubes and structural steel which allows to overcome the above-mentioned inconveniences at the same time reducing as much as possible the sources of noise, while eliminating the need of further personnel in addition to the crane operator and allowing the safe transportation of tubes without the danger of incidental falls thereof.
The device of the invention comprises: a support frame to be hooked to a hoisting apparatus; at least two pairs ~' ~.
.
of bearing and fastening arms, which are pivotally mounted to said frame; at least one pair of planar electromagnets, movable wlth respect to said arms and provided with slits through which metallic blocks may project and caused to be retracted in order to attract a plurality of pieces to be transported in the form of a layer; and means for lifting and lowering said electromagnets with respect to the support frame.
In the following description of an illustrative embodiment of the device, particular reference will be made to the hand-ling of circular cross-section steel tubes, which show the highest number of the mentioned inconveniences. However it should be obvious that the invention may also be applied to articles of ferromagnetic metal, in particular of steel, having a different configuration, such as bars, rods, sheets or plates of reduced width and in general having an elongated shape.
Brief Description of _ e Drawinys The device according to the present invention will be more fully understood by the following detailed description of an embodiment, given by way of a non-limiting example, with reference to the annexed drawings, in which:
FIGURE 1 is a perspective view showing the device with open arms during an operation of taking up or laying down a layer of tubes;
FIGURE 2 is a perspective view of the same device with closed arms during a transportation step; and FIGURE 3 is a cross-section view of an electromagnet at the moment of coming into contact with a layer of tubes to be handled.
Deta_led Description of the Preferred Embodiment With particular referenceto Figs. 1 and 2, the device of the in~ention comprises a supporting f~ame, generally indlcated . ~
.~,"
1, being connected to a hoisting apparatus which may be a common crane, such as of the known bridge type, thus not being illustrated in detail.
Again with reference to Figs. 1 and 2, and also to Fig.
3, the device comprises a pair of electromagnets 8 positioned under the supporting frame. Each electromagnet 8 has a sub-stantially parallelepiped shape, of convenient size and is formed with inner slits for housing metallic blocks 4 which may project or be retracted, thus completely matching with the surface of articles or tubes 18 to be handled.
Each electromagnet 8 is conventionally (not illustrated) connected to an electric power source in the hoisting ap-paratus. The controls for energization and deener~ization of the elec-tromagnets 8 may be advantageously installed in the driver's cab, where the handlin~ operator thus can di-rectly control also this operation.
According to one of the main fehtures of the invention~
the electromagnets 8 are not fixed on the support frame 1, but are vertically movable with respect thereto.
The device of the present invention comprises arms 17 provided for co-operating with the electromagnets 8 to secure the metallic pieces to be handled~ i.e. the steel tubes 18 in the illustrated case. In the illustrated embodiment the securing arms 17 are in number of four, ~ut a different number could be provided, in particular a higher one, de-pending on the lenyth of the tubes 18.
~s shown in Figs. 1, 2 each arm 17 is formed with a L-shaped metallic bar with a vertical side 19 and a horizontal side 20. An end of the side 19 of the securing arms 17 is pivotally inserted in a hole formed in the support frame.
Such an end is held within this hole to allow the side 19 to rotate therein and at the same time to preven-t the same from escaping from the hole.
.
The rotation of the arms 17 is obtained by known means adapted to move the arms 17 from a rest position ~shown in Fig. 1) to the work position (Fig. 2). In the first position of the arms, the electromagnets 8 are allowed to move either downward or upward, whereas in the second position the arms together with the electromagnets 8 are capable of securing the tubes 18.
In operation the side 20 of each arm 17 posi-tions itself under the electromagnets 8 so that these sides 20, with the corresponding lower faces of the electromagnets heavily lying on the tubes 18, from a number of "pincers" for securely gripping the tubes. The ends of the side 20 of each pair of arms 17, during the operation, are almost in contact wi-th o~e another, thus preventing even tubes of very small diameter from escaping and falling down.
The operation of the device according to the invention is the following, when supposing to star-t from the rest posi-tion of Fig. 1, where the electromagne-ts 8 are deenergized and placed at a lower level than the sides 20 of arms 17, with respect to the support frame. In this position the electromagnets 8 are thereby projecting from the device.
The crane driver then operates the hoist means supporting the device to move down until the electromagnets 8 come into contact with the tubes 18. When the electromagnets 8 rest onto the tubes 18l the downward movement of th~ l~olsting ap-paratus is automatically stopped. The operator, upon checking the correct positioning of the electromagnets 8 with respect to the tubes 1~, actuates the energization oE the electro-magnets 8 and then again the liEting of the hoist means.
The lifting is carried out in two stages. In a first time the stroke of the hoist is rather short, such as to cause the layer of tubes 18 to lift by few centimeters being attracted by the electromagnets. This initial stroke is to ascertain that -the layer of tubes 18 is kept attracted by the electromagne-ts 8. At the end of this first path a motor (not shown) is operated, which drives the electromagnets to lift.
As the electromagnets 18 are completely retracted in the device, arms 17 are caused to rotate in order to posltion their portions 20 under the tubes 20 in the work position shown in Fig. 2.
The hoisting apparatus is at this moment operated again, thus beginning the second lifting step during which a down-ward stroke of the electromagnets 8 is caused to be ~fEected.
This downward stroke continues until the tube 18 comes into contact with the sides 20 of arms 17.
In this position, with the supporting cables slightl~
slack, the still energized electromagnets 8 rest by their weight on ~he tubes 18 thus securing these against the arms 17. In this way, since the electromaynet weight is high, any possible movement of the tubes 18 parallel to their longi-tudinal axes is avoided and any one or more of the tubes 18 are prevented from escaping the device.
At the end of the lifting stroke r the operator actuates the motor for the horizontal movement in order to position the device of the invention over the discharge zoneO Upon reaching this zone, he carries out the operations required to discharge the tubes 18.
The downward stroke is stopped as soon as the device according to the invention has approached the layer of tubes already laid down in the preceding operation or the plane on which the tubes 18 must be discharged.
Subsequently the electromagnets 8 are caused to move up-ward again until the tubes 18 are clear of -the arm portions 20 and the arms 17 can return again to the rest position (Fig. 1). The electromagnets 8 are then caused to move down-ward to reach the position illustrated in Fig. 1 t under the sides 20 of the arms 17.
At this stage a further lowering of the whole device is operated until the layer of -tubes 18 comes into contact with the surface below and then, subsequently, the supporting cables or ropes are released, the electromagnets are deener-gized and the handled tubes lie down with the minimum noise on the discharge place.
Thereafter a new charging operation may begin, which takes place as above-described. All the operations for loading tubes, subsequent to the energization of electromagnets 8, may be carried out only if the energization has been actu-ally e~fected ~mder the prescribed conditions and with the predetermined current values. Thus the device of the inven-tion may be lifted only if the tubes 18 are actually a-ttrac-ted by the electromagnets.
Furthermore the charge and discharge of -the tubes is carried out in such conditions that any source of noise is eliminated. This because the handled tubes are not positioned randomly, but are arranged side by side to form a layer which may be laid down easily, without rolling on or impacting against the previously discharged layer.
It should finally be appreciated that all the handling operations are carried out by the crane driver or in general the operator oE the hoisting apparatus. Therefore the pre-SenGe of only one person is required, with a strong reduc-tion of the labour costs and without any further personnel on the ground, who was before the most subject to accidents with the handling devices of the prior art.
All above described can of course be extended to the case of elongated ferromagnetic articles, in particular of steel, .. .
having whichever cross-section~ such as bars, rods and the like, without exceeding the inventive concept of the present device.
Other additions and/or modifications may be made to the de-vice according to the invention withou-t departing from the protective scope of the invention itself, as de-fined in the appended claims.
. ;
_g_
Each electromagnet 8 is conventionally (not illustrated) connected to an electric power source in the hoisting ap-paratus. The controls for energization and deener~ization of the elec-tromagnets 8 may be advantageously installed in the driver's cab, where the handlin~ operator thus can di-rectly control also this operation.
According to one of the main fehtures of the invention~
the electromagnets 8 are not fixed on the support frame 1, but are vertically movable with respect thereto.
The device of the present invention comprises arms 17 provided for co-operating with the electromagnets 8 to secure the metallic pieces to be handled~ i.e. the steel tubes 18 in the illustrated case. In the illustrated embodiment the securing arms 17 are in number of four, ~ut a different number could be provided, in particular a higher one, de-pending on the lenyth of the tubes 18.
~s shown in Figs. 1, 2 each arm 17 is formed with a L-shaped metallic bar with a vertical side 19 and a horizontal side 20. An end of the side 19 of the securing arms 17 is pivotally inserted in a hole formed in the support frame.
Such an end is held within this hole to allow the side 19 to rotate therein and at the same time to preven-t the same from escaping from the hole.
.
The rotation of the arms 17 is obtained by known means adapted to move the arms 17 from a rest position ~shown in Fig. 1) to the work position (Fig. 2). In the first position of the arms, the electromagnets 8 are allowed to move either downward or upward, whereas in the second position the arms together with the electromagnets 8 are capable of securing the tubes 18.
In operation the side 20 of each arm 17 posi-tions itself under the electromagnets 8 so that these sides 20, with the corresponding lower faces of the electromagnets heavily lying on the tubes 18, from a number of "pincers" for securely gripping the tubes. The ends of the side 20 of each pair of arms 17, during the operation, are almost in contact wi-th o~e another, thus preventing even tubes of very small diameter from escaping and falling down.
The operation of the device according to the invention is the following, when supposing to star-t from the rest posi-tion of Fig. 1, where the electromagne-ts 8 are deenergized and placed at a lower level than the sides 20 of arms 17, with respect to the support frame. In this position the electromagnets 8 are thereby projecting from the device.
The crane driver then operates the hoist means supporting the device to move down until the electromagnets 8 come into contact with the tubes 18. When the electromagnets 8 rest onto the tubes 18l the downward movement of th~ l~olsting ap-paratus is automatically stopped. The operator, upon checking the correct positioning of the electromagnets 8 with respect to the tubes 1~, actuates the energization oE the electro-magnets 8 and then again the liEting of the hoist means.
The lifting is carried out in two stages. In a first time the stroke of the hoist is rather short, such as to cause the layer of tubes 18 to lift by few centimeters being attracted by the electromagnets. This initial stroke is to ascertain that -the layer of tubes 18 is kept attracted by the electromagne-ts 8. At the end of this first path a motor (not shown) is operated, which drives the electromagnets to lift.
As the electromagnets 18 are completely retracted in the device, arms 17 are caused to rotate in order to posltion their portions 20 under the tubes 20 in the work position shown in Fig. 2.
The hoisting apparatus is at this moment operated again, thus beginning the second lifting step during which a down-ward stroke of the electromagnets 8 is caused to be ~fEected.
This downward stroke continues until the tube 18 comes into contact with the sides 20 of arms 17.
In this position, with the supporting cables slightl~
slack, the still energized electromagnets 8 rest by their weight on ~he tubes 18 thus securing these against the arms 17. In this way, since the electromaynet weight is high, any possible movement of the tubes 18 parallel to their longi-tudinal axes is avoided and any one or more of the tubes 18 are prevented from escaping the device.
At the end of the lifting stroke r the operator actuates the motor for the horizontal movement in order to position the device of the invention over the discharge zoneO Upon reaching this zone, he carries out the operations required to discharge the tubes 18.
The downward stroke is stopped as soon as the device according to the invention has approached the layer of tubes already laid down in the preceding operation or the plane on which the tubes 18 must be discharged.
Subsequently the electromagnets 8 are caused to move up-ward again until the tubes 18 are clear of -the arm portions 20 and the arms 17 can return again to the rest position (Fig. 1). The electromagnets 8 are then caused to move down-ward to reach the position illustrated in Fig. 1 t under the sides 20 of the arms 17.
At this stage a further lowering of the whole device is operated until the layer of -tubes 18 comes into contact with the surface below and then, subsequently, the supporting cables or ropes are released, the electromagnets are deener-gized and the handled tubes lie down with the minimum noise on the discharge place.
Thereafter a new charging operation may begin, which takes place as above-described. All the operations for loading tubes, subsequent to the energization of electromagnets 8, may be carried out only if the energization has been actu-ally e~fected ~mder the prescribed conditions and with the predetermined current values. Thus the device of the inven-tion may be lifted only if the tubes 18 are actually a-ttrac-ted by the electromagnets.
Furthermore the charge and discharge of -the tubes is carried out in such conditions that any source of noise is eliminated. This because the handled tubes are not positioned randomly, but are arranged side by side to form a layer which may be laid down easily, without rolling on or impacting against the previously discharged layer.
It should finally be appreciated that all the handling operations are carried out by the crane driver or in general the operator oE the hoisting apparatus. Therefore the pre-SenGe of only one person is required, with a strong reduc-tion of the labour costs and without any further personnel on the ground, who was before the most subject to accidents with the handling devices of the prior art.
All above described can of course be extended to the case of elongated ferromagnetic articles, in particular of steel, .. .
having whichever cross-section~ such as bars, rods and the like, without exceeding the inventive concept of the present device.
Other additions and/or modifications may be made to the de-vice according to the invention withou-t departing from the protective scope of the invention itself, as de-fined in the appended claims.
. ;
_g_
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A device for handling steel bars and sections, in particular tubes, arranged in planar bundles, which comprises:
a support frame to be hooked to a hoisting apparatus;
at least two pairs of bearing and fastening substantially L-shaped arms having a first and a second portion at right angles, which are pivotedly mounted about a vertical axis to said frame, at least one pair of electromagnets, movable with respect to said arms and associated thereto, capable of supporting the metallic articles thereon; means for lifting and lowering said electromagnets with respect to the support frame and means for rotating said arms around a first portion thereof, perpendicular to the bundle of articles to be handled.
a support frame to be hooked to a hoisting apparatus;
at least two pairs of bearing and fastening substantially L-shaped arms having a first and a second portion at right angles, which are pivotedly mounted about a vertical axis to said frame, at least one pair of electromagnets, movable with respect to said arms and associated thereto, capable of supporting the metallic articles thereon; means for lifting and lowering said electromagnets with respect to the support frame and means for rotating said arms around a first portion thereof, perpendicular to the bundle of articles to be handled.
2. A device according to claim 1, in which said arms have each a second portion being positioned at a lower level with respect to the electromagnets.
3. A device for handling steel bars and sections, in particular tubes, arranged in planar bundles, which comprises:
a support frame to be hooked to a hoisting apparatus;
at least two pairs of bearing and fastening arms which are pivotedly mounted to said frame; at least one pair of electromagnets movable with respect to said arms and associated thereto capable of supporting the metallic articles thereon; said arms each having a second portion positioned at a lower level with respect to the electromagnets transversely to the length of the tubes; means for lifting and lowering said electromagnets with respect to said support frame; and means for rotating said arms around a first portion thereof perpendicular to the bundle of articles to be handled.
a support frame to be hooked to a hoisting apparatus;
at least two pairs of bearing and fastening arms which are pivotedly mounted to said frame; at least one pair of electromagnets movable with respect to said arms and associated thereto capable of supporting the metallic articles thereon; said arms each having a second portion positioned at a lower level with respect to the electromagnets transversely to the length of the tubes; means for lifting and lowering said electromagnets with respect to said support frame; and means for rotating said arms around a first portion thereof perpendicular to the bundle of articles to be handled.
4. A device according to claim 3, in which said electromagnets are vertically movable until completely resting with their weight on said arms together with the steel articles to be handled.
5. A device for handling metallic articles comprising:
a support frame for attachment to a hoisting apparatus; at least one pair of electromagnets capable of supporting the metallic articles; means for lifting and lowering said electromagnets with respect to said support frame; at least two pairs of bearing and fastening arms pivotally mounted on said frame, each said arm being pivotedly mounted about a vertical axis to move into a working position under said electromagnets; and means for rotating said arms about each respective vertical axis.
a support frame for attachment to a hoisting apparatus; at least one pair of electromagnets capable of supporting the metallic articles; means for lifting and lowering said electromagnets with respect to said support frame; at least two pairs of bearing and fastening arms pivotally mounted on said frame, each said arm being pivotedly mounted about a vertical axis to move into a working position under said electromagnets; and means for rotating said arms about each respective vertical axis.
6. A device as set forth in claim 5, wherein each arm is L-shaped and has a rotatable vertical portion and a horizontal portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000366331A CA1146993A (en) | 1980-12-08 | 1980-12-08 | Device for handling steel bars and sections arranged in planar bundles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000366331A CA1146993A (en) | 1980-12-08 | 1980-12-08 | Device for handling steel bars and sections arranged in planar bundles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1146993A true CA1146993A (en) | 1983-05-24 |
Family
ID=4118654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000366331A Expired CA1146993A (en) | 1980-12-08 | 1980-12-08 | Device for handling steel bars and sections arranged in planar bundles |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1146993A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4893858A (en) * | 1987-06-26 | 1990-01-16 | Toyota Jidosha Kabushiki Kaisha | Movable yoke-type lifting magnet device |
| US5310304A (en) * | 1991-02-08 | 1994-05-10 | Heppenstall Holding Ag | Load-lifting device |
-
1980
- 1980-12-08 CA CA000366331A patent/CA1146993A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4893858A (en) * | 1987-06-26 | 1990-01-16 | Toyota Jidosha Kabushiki Kaisha | Movable yoke-type lifting magnet device |
| US5310304A (en) * | 1991-02-08 | 1994-05-10 | Heppenstall Holding Ag | Load-lifting device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110902250B (en) | Intelligent workshop conveying system and conveying method thereof | |
| EP0879785A2 (en) | Container crane | |
| US7290815B1 (en) | Hoist sling | |
| CA1146993A (en) | Device for handling steel bars and sections arranged in planar bundles | |
| JPH0569944A (en) | Automatic steel carrier device | |
| CN113859337B (en) | Civil engineering construction fragment of brick handling equipment | |
| CN210855050U (en) | Curb installation dolly | |
| JPH0791072A (en) | Hanging in method of external curtain wall and device thereof | |
| JPH0796214A (en) | Renewing technique of electrode plate for electrostatic precipitator, and device thereof | |
| CN217708629U (en) | Be used for large-scale fire-resistant adobe hoist and mount conveyer | |
| JPH10180140A (en) | Method for installing ep inner part and structure for installing ep inner part | |
| KR102281415B1 (en) | Heavy goods transport jig | |
| JPH0610283U (en) | Electric tongs with lifting magnet | |
| JP2816109B2 (en) | Billet removal device of semi-continuous casting machine | |
| JPH07165384A (en) | Angle steel grasping device | |
| CN211437963U (en) | Feeding basket and feeding system | |
| RU202746U1 (en) | Magnetic traverse for moving metal loads | |
| CN110040620B (en) | Bracket and using method thereof | |
| KR101220780B1 (en) | Apparatus for Supplying Cover to Wire-rod Coil | |
| CN108910515B (en) | Adjustable loading and unloading mechanical arm | |
| CN110642173A (en) | Curb mounting trolley and construction method | |
| JP3845877B2 (en) | Barrier deck equipment for repair of metal smelting furnace | |
| US3587889A (en) | Method and apparatus for handling a load | |
| RU2243142C1 (en) | Round load-lifting electromagnet | |
| JP2001199638A (en) | Uncoiling device for coil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |