CN102320527B - Counterweight balancing mechanism and double-cantilever crane - Google Patents

Counterweight balancing mechanism and double-cantilever crane Download PDF

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Publication number
CN102320527B
CN102320527B CN 201110296211 CN201110296211A CN102320527B CN 102320527 B CN102320527 B CN 102320527B CN 201110296211 CN201110296211 CN 201110296211 CN 201110296211 A CN201110296211 A CN 201110296211A CN 102320527 B CN102320527 B CN 102320527B
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China
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equalizing bar
counterweight balancing
hinged
counterweight
counter weight
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CN 201110296211
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Chinese (zh)
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CN102320527A (en
Inventor
詹纯新
刘权
林新
高一平
张玉柱
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中联重科股份有限公司
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Priority to CN 201110296211 priority Critical patent/CN102320527B/en
Publication of CN102320527A publication Critical patent/CN102320527A/en
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Publication of CN102320527B publication Critical patent/CN102320527B/en

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Abstract

The invention discloses a counterweight balancing mechanism used for double cantilevers of a crane. The mechanism comprises a counterweight base (1) and a primary balance beam (2), wherein the middle connection point of the primary balance beam (2) is hinged with the counterweight base (1); and two lateral connection points symmetrically distributed relative to the middle connection point are respectively hinged with the double cantilevers of the crane. The counterweight balancing mechanism has the following beneficial effects: the counterweight balancing mechanism can transmit the counterweight forces to the cantilevers, and the connecting pieces between the counterweight base and the double cantilevers of the crane are connected via a hinge point only with a rotational degree of freedom and can rotate relatively around the hinge point until the two cantilevers bear balanced forces when the two cantilevers bear uneven forces, thus playing a role of automatically adjusting the forces to be balanced.

Description

Counterweight balancing mechanism and double-boom crane

Technical field

The present invention relates to a kind of counterweight balancing mechanism, particularly, relate to a kind of counterweight balancing mechanism for hoisting crane both arms frame, and the double-boom crane that comprises this counterweight balancing mechanism.

Background technology

In order to realize large lifting weight, need design to produce superhuge hoisting crane, this ultra-large type hoisting crane is generally crawler crane.Crawler crane is a kind of runabout crane that carries out the operations such as material lifting, transportation, loading and unloading and installation, is one of most important main force hoisting crane in the handling equipment.It is large that this hoisting crane has hoisting capacity, and grounding pressure is little, and jib has the multiple combination mode and can be with advantages such as carrying walking, therefore is widely used in the Large Scale Construction Engineerings such as water conservancy, electric power, petrochemical complex, harbour and bridge.

In order to give full play to the jib performance of goliath, can increase counterweight balancing device at original crane foundation.Normally between mast (Shears) and jib, boom type is installed and has surpassed mast, to improve the geometric relationship of jib and drag-line, surpassed simultaneously mast and linked to each other with counterweight balancing device, with the stability of increase complete machine, thus the performance of raising hoisting crane.

The ultra-large type crawler crane, 3000 tonnes of crawler cranes particularly, for guaranteeing structural strength and transportation request, its boom system substantially all adopts both arms shelf structure form, therefore, it has surpassed mast and also has been designed to accordingly both arms shelf structure form, how to connect counterweight balancing device and has surpassed mast and the stressed equiblibrium mass distribution that obtains is had a significant impact the performance tool of hoisting crane.

Usually, counterweight balancing device has two kinds of common type: a kind of is the trailer-type counterweight balancing device, and all counterweights are placed on the counterweight trolley, and the stability of complete machine is in optimum regime all the time, the realization of working conditions change is simple, and counterweight trolley can be on the ground and main frame synchronous walking or revolution; Another kind is floated counterweight balancing device, and super-starting balance weight is liftoff in operation process, otherwise main frame can not be walked and be turned round operation.

Generally speaking, the trailer-type counterweight balancing device is had relatively high expectations to ground, ground needs to satisfy the walking of counterweight trolley at least, this trailer-type counterweight balancing device is applicable to preferably operation place of this surface state in shipbuilding yard, and the trailer-type counterweight balancing device also can be regarded Floating use certainly.Floated counterweight balancing device only requires that ground flat degree and the intensity of parking counterweight can satisfy.But when using floated counterweight balancing device, hoisting capacity and work range will with balance weight and counterweight amplitude coupling, can guarantee that like this counterweight is liftoff to walk or the operation such as revolution.

Figure 1 shows that a kind of trailer-type and the floated counterweight balancing device that combines.As shown in Figure 1, counterweight is linked to each other with mast with arm-tie by horizontal suspension, the stress point of horizontal suspension is 3, two ends are suspension counterweight stress point, the centre is the counterweight trolley stress point, be 2 points by 4 arm-ties with 3 stressed converging of stress point again, but its connecting portion all can not play the effect of force balance, therefore not have the function of automatically regulating.

Summary of the invention

The purpose of this invention is to provide a kind of counterweight balancing device, this counterweight balancing device can automatically regulate so that the both arms frame stress balance of hoisting crane.

To achieve these goals, the invention provides a kind of counterweight balancing mechanism for hoisting crane both arms frame, wherein, described counterweight balancing mechanism comprises counter weight base and one-level equalizing bar, the intermediate connection point of wherein said one-level equalizing bar and described counter weight base are hinged, and be hinged with the both arms frame of described hoisting crane respectively with respect to the both sides point of connection that this intermediate connection point is symmetrical.

Preferably, described counter weight base is the body structure with opening, and described one-level equalizing bar is arranged among the described counter weight base.

Preferably, the both sides point of connection of described one-level equalizing bar is connected with the both arms frame of described hoisting crane by bindiny mechanism, and described bindiny mechanism is hinged with the both arms frame of described one-level equalizing bar and described hoisting crane respectively.

Preferably, described bindiny mechanism comprises arm-tie, and an end of this arm-tie and the both sides point of connection of described one-level equalizing bar are hinged, and the both arms frame of the other end and described hoisting crane is hinged

Preferably, described bindiny mechanism comprises the secondary equalizing bar, and the two ends of arm-tie are connected to the both sides point of connection of one-level equalizing bar and the both arms frame of described hoisting crane by the secondary equalizing bar respectively.

Preferably, described arm-tie is two, and the intermediate connection point of described secondary equalizing bar and described one-level equalizing bar are hinged, and is hinged respectively at two described arm-ties with respect to the both sides point of connection that this intermediate connection point is symmetrical.

Preferably, be arranged between the clump weight on the described counter weight base and have assemblage gap, described assemblage gap setting is passed by described bindiny mechanism.

Preferably, described one-level equalizing bar is isosceles triangular structure.

Preferably, described secondary equalizing bar is isosceles triangular structure.

Preferably, described counter weight base is arranged on the caterpillar chassis by turn table.

The present invention also provides a kind of double-boom crane in addition, comprise with the front truck of both arms frame with the rear car of counterweight balancing mechanism, connect by link span between front truck and the rear car, wherein, the counterweight balancing mechanism of described rear car is the counterweight balancing mechanism above-mentioned according to the present invention.

Pass through technique scheme, counterweight balancing mechanism of the present invention can be passed to jib with counterweight forces, and all connect by the hinge-point that only has a rotational freedom between each attaching parts between counter weight base and the hoisting crane both arms frame, when two jib unbalance stress each attaching parts can around hinge-point relatively rotation until two jib stress balances, thereby play the effect of automatic adjusting stress balance.

Other features and advantages of the present invention will partly be described in detail in the specific embodiment subsequently.

Description of drawings

Accompanying drawing is to be used to provide a further understanding of the present invention, and consists of the part of specification sheets, is used from explanation the present invention with the following specific embodiment one, but is not construed as limiting the invention.In the accompanying drawings:

Fig. 1 is the counterweight balancing mechanism scheme drawing of existing double-boom crane;

Fig. 2 is the scheme drawing of counterweight balancing mechanism of the present invention.

Description of reference numerals

1 counter weight base, 2 one-level equalizing bars

3 arm-ties, 4 secondary equalizing bars

5 turn tables, 6 caterpillar chassiss

The specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.Should be understood that the specific embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.

In the present invention, do not doing in the situation of opposite explanation, the noun of locality of use typically refers to the direction as shown in the Figure of description such as " upper and lower, left and right ".

The invention provides a kind of counterweight balancing mechanism for hoisting crane both arms frame, wherein, described counterweight balancing mechanism comprises counter weight base 1 and one-level equalizing bar 2, the intermediate connection point of wherein said one-level equalizing bar 2 and described counter weight base 1 are hinged, and be hinged with the both arms frame of described hoisting crane respectively with respect to the both sides point of connection that this intermediate connection point is symmetrical.

Technique scheme of the present invention realizes that force balance is mainly by one-level equalizing bar 2 hinged connection mode respectively and between counter weight base 1 and the both arms frame, so that only have a rotational freedom between two parts that are hinged.Because the both sides point of connection distributes symmetrically about intermediate connection point, and this intermediate connection point and both sides point of connection are connected with the both arms frame with counter weight base 1 by hinged mode respectively, therefore one-level equalizing bar 2 will rotate around hinge-point respectively in one direction with counter weight base 1 or both arms frame before stress balance, until the stress balance on two jibs.

Connecting by the one-level equalizing bar between the both arms frame of above-mentioned counter weight base and hoisting crane is a kind of embodiment, can utilize in actual applications a plurality of attaching partss to connect.Pass through technique scheme, make between each attaching parts between counter weight base and the hoisting crane both arms frame and all connect by the hinge-point that only has a rotational freedom, when two jib unbalance stress each attaching parts can around hinge-point relatively rotation until two jib stress balances, thereby play the effect of automatic adjusting stress balance.

Preferably, described counter weight base 1 is for having the body structure of opening, and described one-level equalizing bar 2 is arranged among the described counter weight base 2.

Clump weight is arranged on the counter weight base 1 usually, therefore counter weight base 1 can be set to have the body structure of opening usually, upper surface at counter weight base 1 has opening, so just one-level equalizing bar 2 can be embedded in the casing of this counter weight base 1 and arrange, and the opening that the both sides point of connection of one-level equalizing bar 2 can pass this counter weight base 1 is connected with the both arms frame.By the preferred implementation of above-mentioned counter weight base 1, can save the space, and concealed one-level equalizing bar in transportation, do not need the dismounting, very convenient.

Preferably, the both sides point of connection of described one-level equalizing bar 2 is connected with the both arms frame of described hoisting crane by bindiny mechanism, and described bindiny mechanism is hinged with the both arms frame of described one-level equalizing bar 2 and described hoisting crane respectively.

Because therefore counter weight base 1 and the common apart from each other of both arms frame only utilize one-level equalizing bar 2 to connect counter weight base 1 and both arms frame, the size of one-level equalizing bar 2 is just larger, so also can cause the strength decreased of this one-level equalizing bar 2.Therefore, usually between the both arms frame of one-level equalizing bar 2 and hoisting crane, utilize bindiny mechanism to connect.And hingedly be connected respectively between this bindiny mechanism and one-level equalizing bar 2 and the both arms frame, therefore this bindiny mechanism also can only rotate in one direction, thereby also can play the effect of minute balancing of exerting all one's strength, so that equate with the pulling force of the hinged bindiny mechanism of the both sides point of connection of two one-level equalizing bars 2 respectively.

Preferably, described bindiny mechanism comprises arm-tie 3, and an end of this arm-tie 3 and the both sides point of connection of described one-level equalizing bar 2 are hinged, and the both arms frame of the other end and described hoisting crane is hinged

This bindiny mechanism preferably adopts the form of arm-tie 3, and the two ends of arm-tie 3 are hinged with one-level equalizing bar 2 and both arms frame respectively, and such two arm-ties, 3 suffered pulling force equate, thereby two suffered pulling force of jib are equated.

Preferably, described bindiny mechanism comprises secondary equalizing bar 4, and the two ends of arm-tie 3 are connected to the both sides point of connection of one-level equalizing bar 2 and the both arms frame of described hoisting crane by secondary equalizing bar 4 respectively.

In this preferred implementation, bindiny mechanism also comprises secondary equalizing bar 4, this secondary equalizing bar 4 is hinged on respectively between arm-tie 3 and one-level equalizing bar 2 and arm-tie 3 and the both arms frame, therefore this secondary equalizing bar also can only rotate in one direction, thereby make further the suffered tension balanced of two arm-ties 3, and then make the stress balance of two jibs.Usually, the size of this secondary equalizing bar 4 is less, and its Main Function is to make between counter weight base 1 and the both arms frame to have more attaching parts, is subjected to equilibrium of forces thereby can more accurately adjust.

Preferably, described arm-tie 3 is two, and the intermediate connection point of described secondary equalizing bar 4 and described one-level equalizing bar 2 are hinged, and is hinged with two described arm-ties 3 respectively with respect to the symmetrical both sides point of connection of this intermediate connection point.

That is to say, in this preferred implementation, each hinged secondary equalizing bar 4 of two both sides point of connection of one-level equalizing bar 2, each secondary equalizing bar 4 is each hinged two arm-tie 3 again, two arm-ties 3 are again by on the secondary equalizing bar 4 hinged same jibs, and two other arm-tie 3 is hinged on another jib by another secondary equalizing bar 4.Like this, between one-level equalizing bar and both arms frame, be connected with altogether 4 arm-ties 3, so just reduced the stressed of each arm-tie 3, thereby improve the life-span of arm-tie 3 and the danger of Reduction of failure.

Preferably, described secondary equalizing bar 4 passes described opening and is connected with described one-level equalizing bar 2.

By the agency of above, the size of this secondary equalizing bar 4 is usually less, mainly plays to connect one-level equalizing bar 2 and arm-tie 3, and makes between counter weight base 1 and the both arms frame and have how hinged attaching parts.When counter weight base 1 adopted the embodiment of the casing with opening, one-level equalizing bar 2 can be arranged in the casing of counter weight base 1 fully, so the opening that this secondary equalizing bar 4 just can pass on the casing of counter weight base 1 is connected with the one-level equalizing bar.

Preferably, be arranged between the clump weight on the described counter weight base 1 and have assemblage gap, described assemblage gap setting is passed by described bindiny mechanism.

As mentioned above, because one-level equalizing bar 2 is arranged in the casing of counter weight base 1, and the needs between one-level equalizing bar 2 and the both arms frame arrange bindiny mechanism, therefore are arranged between the clump weight on the counter weight base 1 to have assemblage gap, in order to this bindiny mechanism is installed.

Preferably, described one-level equalizing bar 2 is isosceles triangular structure.

Because one-level equalizing bar 2 has an intermediate connection point and two both sides point of connection about the intermediate connection point symmetry, and the stressed of both sides point of connection should balance, and therefore a kind of preferably embodiment is exactly the one-level equalizing bar 2. that adopts isosceles triangular structure

In addition, preferably, described secondary equalizing bar 4 is isosceles triangular structure.Because secondary equalizing bar 2 also has an intermediate connection point and two both sides point of connection about the intermediate connection point symmetry, and the stress balance of two arm-ties 3 connecting of both sides point of connection, so a kind of preferred implementation of this secondary equalizing bar 4 adopts isosceles triangular structure exactly.

Preferably, be connected by bearing pin between described one-level equalizing bar 2 and the described counter weight base 1.In addition, preferably, be connected by bearing pin between described one-level equalizing bar 2 and the described bindiny mechanism and/or between the both arms frame of described connection structure and described hoisting crane.Also preferably, be connected by bearing pin between described one-level equalizing bar 2 and the described arm-tie 3 and/or between the both arms frame of described arm-tie 3 and described hoisting crane.In addition, preferably, be connected by bearing pin between described one-level equalizing bar 2 and the described secondary equalizing bar 4 and/or between described secondary equalizing bar 4 and the described arm-tie 3 and/or between the both arms frame of described secondary equalizing bar 4 and described hoisting crane.

In above-mentioned each preferred implementation, at all hinged point of connection places of the present invention, for example between one-level equalizing bar 3 and the counter weight base 1, between one-level equalizing bar 2 and the bindiny mechanism and/or between the both arms frame of connection structure and hoisting crane, for the connection structure that is preferably arm-tie 3, then be between one-level equalizing bar 2 and the described arm-tie 3 and/or between the both arms frame of described arm-tie 3 and described hoisting crane, also have between one-level equalizing bar 2 and the described secondary equalizing bar 4 and/or between described secondary equalizing bar 4 and the described arm-tie 3 and/or between the both arms frame of described secondary equalizing bar 4 and described hoisting crane, above-mentioned hinge-point all is preferably by bearing pin and connects.

Preferably, described counter weight base 1 is arranged on the caterpillar chassis 6 by turn table 5.

For counterweight balancing mechanism of the present invention, preferably adopt trailer-type, counter weight base is arranged on the counterweight trolley, and this counterweight trolley is preferably crawler type, so counter weight base 1 preferably is arranged on the caterpillar chassis 6.

In addition, the present invention also provides a kind of both arms frame crawler crane, comprise with the front truck of both arms frame with the rear car of counterweight balancing mechanism, connect by link span between front truck and the rear car, wherein, the counterweight balancing mechanism of described rear car be according to claim 1-15 in the described counterweight balancing mechanism of any one.

By above-mentioned counterweight balancing mechanism of the present invention, so that acting on two pulling force on the jib, the counterweight of this both arms frame crawler crane can balancedly distribute.

Below describe by reference to the accompanying drawings preferred implementation of the present invention in detail; but; the present invention is not limited to the detail in the above-mentioned embodiment; in technical conceive scope of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.

Need to prove in addition, each concrete technical characterictic described in the above-mentioned specific embodiment in reconcilable situation, can make up by any suitable mode, for fear of unnecessary repetition, the present invention is to the no longer separately explanation of various possible array modes.

In addition, also can carry out combination in any between the various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.

Claims (11)

1. counterweight balancing mechanism that is used for hoisting crane both arms frame, it is characterized in that, described counterweight balancing mechanism comprises counter weight base (1) and one-level equalizing bar (2), the intermediate connection point of wherein said one-level equalizing bar (2) and described counter weight base (1) are hinged, and be hinged with the both arms frame of described hoisting crane respectively with respect to the both sides point of connection that this intermediate connection point is symmetrical.
2. counterweight balancing mechanism according to claim 1 is characterized in that, described counter weight base (1) is for having the body structure of opening, and described one-level equalizing bar (2) is arranged among the described counter weight base (1).
3. counterweight balancing mechanism according to claim 1 and 2, it is characterized in that, the both sides point of connection of described one-level equalizing bar (2) is connected with the both arms frame of described hoisting crane by bindiny mechanism, and described bindiny mechanism is hinged with the both arms frame of described one-level equalizing bar (2) and described hoisting crane respectively.
4. counterweight balancing mechanism according to claim 3 is characterized in that, described bindiny mechanism comprises arm-tie (3), and the both sides point of connection of an end of this arm-tie (3) and described one-level equalizing bar (2) is hinged, and the both arms frame of the other end and described hoisting crane is hinged.
5. counterweight balancing mechanism according to claim 4, it is characterized in that, described bindiny mechanism comprises secondary equalizing bar (4), and the two ends of arm-tie (3) are connected to the both sides point of connection of one-level equalizing bar (2) and the both arms frame of described hoisting crane by secondary equalizing bar (4) respectively.
6. counterweight balancing mechanism according to claim 5, it is characterized in that, described arm-tie (3) is two, the intermediate connection point of described secondary equalizing bar (4) and described one-level equalizing bar (2) are hinged, and be hinged with two described arm-ties (3) respectively with respect to the both sides point of connection that this intermediate connection point is symmetrical.
7. the described counterweight balancing mechanism of any one is characterized in that according to claim 4-6, is arranged between the clump weight on the described counter weight base (1) to have assemblage gap, and described assemblage gap setting is passed by described bindiny mechanism.
8. counterweight balancing mechanism according to claim 1 is characterized in that, described one-level equalizing bar (2) is isosceles triangular structure.
9. counterweight balancing mechanism according to claim 5 is characterized in that, described secondary equalizing bar (4) is isosceles triangular structure.
10. counterweight balancing mechanism according to claim 1 is characterized in that, described counter weight base (1) is arranged on the caterpillar chassis (6) by turn table (5).
11. double-boom crane, comprise with the front truck of both arms frame with the rear car of counterweight balancing mechanism, connect by link span between front truck and the rear car, it is characterized in that, the counterweight balancing mechanism of described rear car be according to claim 1-10 in the described counterweight balancing mechanism of any one.
CN 201110296211 2011-09-29 2011-09-29 Counterweight balancing mechanism and double-cantilever crane CN102320527B (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013044485A1 (en) * 2011-09-29 2013-04-04 长沙中联重工科技发展股份有限公司 Counterweight balancing mechanism and dual arm crane
CN103170963B (en) * 2013-03-20 2015-08-05 辽宁威跃集团机械制造有限公司 Dual-arm robot

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4204603A (en) * 1977-04-29 1980-05-27 Creusot-Loire High-capacity crane with counter-weight device
US4508232A (en) * 1981-12-10 1985-04-02 Riggers Manufacturing Co. Counterbalanced crane structure
CN101309850A (en) * 2005-11-17 2008-11-19 特雷克斯-德马格有限及两合公司 Modular counterweight carriage for cranes, in particular for large cranes
CN101844730A (en) * 2009-03-27 2010-09-29 徐工集团工程机械股份有限公司建设机械分公司 Construction crane and superlift counterweight tray thereof
CN102020210A (en) * 2009-08-06 2011-04-20 马尼托瓦克起重机有限责任公司 Lift crane with moveable counter weight
CN201914870U (en) * 2010-12-31 2011-08-03 徐州重型机械有限公司 Crane and balancing weight device thereof
CN102167262A (en) * 2010-02-09 2011-08-31 神钢起重机株式会社 Mobile crane having counterweight
CN202245848U (en) * 2011-09-29 2012-05-30 中联重科股份有限公司 Counterweight balancing mechanism and double-boom crane

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0428639B2 (en) * 1987-05-08 1992-05-14 Sumitomo Kenki Kk

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4204603A (en) * 1977-04-29 1980-05-27 Creusot-Loire High-capacity crane with counter-weight device
US4508232A (en) * 1981-12-10 1985-04-02 Riggers Manufacturing Co. Counterbalanced crane structure
CN101309850A (en) * 2005-11-17 2008-11-19 特雷克斯-德马格有限及两合公司 Modular counterweight carriage for cranes, in particular for large cranes
CN101844730A (en) * 2009-03-27 2010-09-29 徐工集团工程机械股份有限公司建设机械分公司 Construction crane and superlift counterweight tray thereof
CN102020210A (en) * 2009-08-06 2011-04-20 马尼托瓦克起重机有限责任公司 Lift crane with moveable counter weight
CN102167262A (en) * 2010-02-09 2011-08-31 神钢起重机株式会社 Mobile crane having counterweight
CN201914870U (en) * 2010-12-31 2011-08-03 徐州重型机械有限公司 Crane and balancing weight device thereof
CN202245848U (en) * 2011-09-29 2012-05-30 中联重科股份有限公司 Counterweight balancing mechanism and double-boom crane

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JP昭54-97956A 1979.08.02
JP昭63-277194A 1988.11.15

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