JP2005225666A - Connector, and main rope device and guy rope using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector of simple structure capable of surely preventing easy fall of a link chain from a receiver part without having a movable member, and to provide a main rope device and a guy rope using the same. <P>SOLUTION: The connector 1 is structured by providing the receiver part 6 for receiving the link chain 4 with an insert part 16, which is provided with a slit 15 for insert of a vertical link 4 of the link chain 4, and providing a receiver part 18, with which a lateral link 17 connected to a vertical link 14 is locked to be brought in contact, and providing the receiver part 18 with magnets 24 and 25 to be held by a contact with the lateral link 17. The connector 1 is appropriately used for the main rope device 26 and the guy rope 40. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a connection fitting, and more particularly to a connection fitting for connecting a link chain, a master rope device using the connection fitting, and an intermediate rope.

  In order to connect a link chain having a shape in which a number of vertical links and horizontal links are alternately connected to another link chain or to connect one link chain in a ring shape, any link chain can be used. A connecting fitting that engages with the link is used.

  For example, as shown in FIGS. 9 to 11 of Patent Document 1, the connection fitting described in Patent Document 1 includes an insertion portion provided with a slit 5 for inserting the vertical link 23 of the link chain, and a vertical link 23. In the state inserted in the slit 5, it has the receiving part of the link chain provided with the receiving part 8, 9, 20, 21 to which the horizontal link 22 connected with the said vertical link 23 is latched.

  Further, as seen in each of the above figures, the entrance of the slit 5 that accommodates the vertical link 23 is inclined upward in the drawing with respect to the pulling direction of the link chain (downward on the drawing along the line II in FIG. 9). This prevents the vertical link 23 from easily coming out of the slit 5 when a force in the direction opposite to the pulling direction is applied to the link chain.

  As shown in FIGS. 1 to 3 of Patent Document 2, the connecting metal fitting described in Patent Document 2 includes an insertion portion provided with a slit 12 through which the vertical link 24 of the link chain is inserted, and the vertical link 24 is a slit. 12, a link chain receiving portion including receiving portions 4 and 5 to which the horizontal link 13 connected to the vertical link 24 is locked.

  In addition, as shown in each of the above drawings, the receiving portion has a shaft 20 whose axis is oriented in a lateral direction perpendicular to the pulling direction of the link chain (downward in the drawing in each drawing), and the shaft 20 is the center. The safety member 17 is rotatably supported with respect to the connecting metal fitting, and the spring 21 biases the safety member 17 in the counterclockwise direction in FIG.

  Of these, the safety member 17 includes a pair of arm portions 18 and 19 projecting in another direction at an angle of about 90 ° about the shaft 20, and an engaging tongue portion 16 provided at the tip of the arm portion 18. . The safety member 17 is urged counterclockwise by the urging force of the spring 21, so that the arm portion 19 abuts on the shoulder portion 22 of the coupling metal, and the engaging tongue portion 16 protrudes into the receiving portion. The state shown in FIG. 2 is maintained.

  In this state, even if a force in the direction opposite to the pulling direction (upward in the drawing in each figure) is applied to the link chain, the engaging tongue 16 projecting into the receiving portion comes into contact with the vertical link 24, and from the slit 12 The vertical link 24 is prevented from coming out, thereby preventing the link chain from coming off.

  To release the retaining member, the rear end surface 23 of the arm portion 19 is pushed upward with a finger as shown in FIG. 2, and the safety member 17 is resisted against the biasing force of the spring 21 in FIG. By rotating in the clockwise direction, the arm portion 18 is brought into contact with the back portion 3 of the connection fitting. If it does so, since contact | abutting with the engagement tongue part 16 and the vertical link 24 will be cancelled | released, a link chain can be taken out from a receiving part.

  The connecting bracket described in Patent Document 3 is different from the two described above in that one link of the link chain is connected to both sides in the length direction of the link chain (upper and lower sides of the page in FIG. 1 of Patent Document 3). It is for pinching and engaging. That is, as shown in FIG. 1 and FIG. 2 of Patent Document 3, the connecting metal fitting includes a pair of claw members 11 and 12 each having a receiving portion to which the end portions 17 and 17 of the link 14 are locked at the tip thereof. The pair of claw members 11 and 12 includes a shaft 13 that is connected to each other so as to be opened and closed.

  Further, the claw member 11 includes a shaft 23 arranged in parallel in the vicinity of the shaft 13, a lock 20 that is rotatably supported with respect to the claw member 11 around the shaft 23, and the lock 20. 1 is provided with a spring 21 that biases counterclockwise.

  A step portion facing the shaft 23 is formed on the side edge of the lock 20 on the shaft 13 side. Further, a small wheel 22 is provided at the tip of the lock 20 as a knob when the lock 20 is rotated in the clockwise direction against the urging force of the spring 21.

  On the other hand, as shown in FIG. 1, the claw member 12 is engaged with the step portion of the lock 20 on the periphery of the claw member 12 around the shaft 13, and the claw member 12 is further rotated counterclockwise from the position shown in the figure. A cam is formed having a shoulder 19 that prevents rotation in the direction.

  In the locked state shown in the figure, the upper and lower ends 17 and 17 of the link 14 are locked by the receiving portions at the tips of the pair of claws 11 and 12.

In order to release this locking, first, the lock 20 is rotated in the clockwise direction against the biasing force of the spring 21, so that the stepped portion of the lock 20 and the shoulder portion 19 of the claw member 12 are moved. Release the engagement. Then, when the claw member 12 is further rotated counterclockwise from the position shown in the drawing, the upper and lower end portions 17 and 17 of the link 14 are unlocked by the receiving portions at the tips of the pair of claw members 11 and 12. be able to.
Japanese Examined Patent Publication No. 61-25635 (column 5, line 38 to column 6, line 20, FIGS. 9 to 11) British Patent Publication No. 1567433 (page 2, left column, line 40 to page right column, line 98, FIGS. 1 to 3) US Pat. No. 5,193,872 (column 2, line 10 to column 3, line 2, FIGS. 1 and 2)

  The connection fitting described in Patent Document 1 is added to the link chain because the entrance portion of the slit 5 is inclined as described above, and no other means for positively preventing the connection is provided. Depending on the direction of the force and the like, the link chain may easily come out of the receiving part.

  Moreover, since the connection metal fitting of patent document 2 has the safety member 17 and the spring 21 which rotate centering on the movable member, ie, the axis | shaft 20, the number of parts is large and a structure is complicated. For this reason, failure or the like is likely to occur. In particular, when the spring 21 that functions as a locking mechanism for retaining is broken, the retaining by the safety member 17 is inadvertently released, and the link chain may come out from the receiving portion. There is.

  The connecting metal fitting described in Patent Document 3 is also the same, and has a pair of claw members 11 and 12 that rotate around a movable member, that is, a shaft 13, a lock 20 that rotates around a shaft 23, and a spring 21. The number of points is large and the structure is complicated. In particular, when the spring 21 that causes the lock 20 to function is damaged, the locking of the link 14 by the claw members 11 and 12 may be inadvertently released.

  The present invention has been made in view of such circumstances, and the object of the present invention is to allow the link chain to be easily removed from the receiving portion even though the movable member is not provided and the structure is simple. It is an object of the present invention to provide a connection fitting that can surely prevent the occurrence of a failure, a parent rope device using the connection fitting, and an intermediate rope.

  In order to achieve the above object, according to the first aspect of the present invention, there is provided a connection fitting for connecting a link chain in which vertical links and horizontal links are alternately connected, and a receiving part for receiving the link chain; A fixing portion for fixing the link chain, and the receiving portion is provided with an insertion portion provided with a slit through which the vertical link of the link chain is inserted, and the vertical link is inserted into the slit of the insertion portion. A receiving portion connected to the inserted vertical link and locked to contact the horizontal link of the link chain, and the fixing portion is in contact with the horizontal link at the receiving portion. The magnet is characterized in that it is a magnet that holds the lateral link by magnetic force.

  According to such a configuration, the vertical link of the link chain is inserted into the slit, and the horizontal link connected to the vertical link is locked by the receiving portion, and the horizontal link is received by the magnetic force of the magnet as the fixed portion. Retained. Therefore, it is possible to reliably prevent the link chain from coming out of the receiving part. In addition, since there is no movable member, the structure can be simplified and no failure or the like occurs. Therefore, there is no possibility of the link chain being unintentionally released due to an unexpected failure and the link chain coming out from the receiving portion.

  The invention according to claim 2 is a master rope device comprising a master rope to which a safety belt is attached and a tensioner for tensioning the master rope between a pair of fixing parts, wherein the tensioner is attached to one fixing part. An attachment member and a connection member connected to the master rope, the connection member comprises a link chain wound around a tensioner, the master rope is a link chain, and the connection member and the master rope are It is connected by the connecting metal fitting according to claim 1.

  According to such a configuration, the link chain of the connecting member and the link chain as the master rope can be easily and reliably connected by the connecting fitting of the present invention. Therefore, in the past, for example, a master rope formed with a rope or wire rope made of natural or synthetic fibers can be formed with a link chain as described above, so there is a risk of falling, such as a high place or an opening. It becomes possible to further improve the safety of the master rope device used for the purpose of ensuring the safety of the worker at the place than before.

  In other words, as a parent rope, the amount of elongation when tension is applied in the length direction is significantly smaller than conventional ropes and wire ropes, so that the initial tension can be maintained stably and the link with extremely high tensile fracture resistance. If the chain is used, the parent rope can be tensioned between the pair of fixed portions with a stronger tension than before. For this reason, it is possible to reduce the amount of drooping when a fall accident occurs to the utmost limit, and to prevent the occurrence of a secondary disaster in the unlikely event of a fall. In addition, the master rope that has been tensioned with a strong tension as described above can function as a handrail when the operator moves on the beam, for example. Moreover, since the master rope composed of link chains has irregularities due to the links, when the worker moves, the safety belt (lifeline) attached to the master rope vibrates or emits sound, , It can make the presence of the master rope and the safety belt firmly and can improve the worker's safety awareness. Therefore, safety can be improved by the above effect.

  The invention according to claim 3 is the invention according to claim 2, wherein the attachment member is attached to a fixing belt whose one side end is connected to a tensioner and to the other end of the fixing belt. The hook member is formed in a hook shape and includes a hook that engages with the fixing belt, and the hook has an inner peripheral surface in a direction perpendicular to the circumferential direction of the hook. It is characterized by being wider than the outer peripheral surface.

  According to such a configuration, the width of the inner peripheral surface of the hook that is in direct contact with the fixing belt when engaged with the hook is larger than the width of the outer peripheral surface, so that the hook member on the fixing belt is The movement can be made smooth. For this reason, the workability | operativity at the time of attaching to a pillar can be improved by, for example, winding a fixing belt around the pillar as a fixing | fixed part, and hooking a hook member on a fixing belt and forming a ring. In addition, since the hook has the above-described shape, the strength of the hook can be improved, and the strength of the entire hook and the strength when the tension of the master rope is loaded at the tip of the hook can also be improved.

  The invention according to claim 4 is the invention according to claim 2 or 3, wherein the master rope is provided with a hook member attached to the other fixing portion at one side end portion, and the connection to the other end portion. It is characterized by having metal fittings.

  According to such a structure, the said main rope and the link chain of the connection member of a tensioner can be connected easily and reliably by the connection metal fitting provided in the main rope. In addition, for example, by forming a ring using a connection fitting at the other end of one master rope, and engaging a hook member of another master rope therewith, a plurality of master ropes can be strengthened. It can also be connected to one without causing a drop. For this reason, by preparing a plurality of master ropes of one type or several types of length, and connecting them in an appropriate number according to the length between the pair of fixed portions, It is possible to flexibly cope with the difference in length.

  The invention according to claim 5 is the invention according to claim 4, wherein the hook member is formed in a hook shape and includes a hook that engages with the master rope, and the hook is orthogonal to a circumferential direction of the hook. It is characterized in that the inner peripheral surface of the ridge is wider than the outer peripheral surface in the direction to be performed.

  According to such a configuration, the hook member can be moved on the master rope by making the width of the inner peripheral surface of the hook directly contacting the master rope when engaged with the hook larger than the width of the outer peripheral surface. Can be smooth. For this reason, the workability | operativity at the time of attaching to a pillar can be improved by, for example, winding a parent rope around the pillar as a fixing | fixed part, and hooking a hook member on a parent rope to form a ring. In addition, since the hook has the above-described shape, the strength of the hook can be improved, and the strength of the entire hook and the strength when the tension of the master rope is loaded at the tip of the hook can also be improved.

  The invention according to claim 6 is the invention according to any one of claims 2 to 5, characterized in that a link chain of the connection member includes the coupling fitting.

  According to such a configuration, the link chain and the master rope can be easily and reliably connected by the connecting metal fitting provided on the link chain of the connecting member. In addition, if the connecting bracket is provided on both the link chain and the master rope of the connecting member, and the link chain of the connecting member and the master rope are connected using the two connecting brackets at the same time, the reliability of the connection can be further improved. Can do.

  The invention according to claim 7 is the invention according to any one of claims 2 to 6, wherein each link constituting the link chain has a wire diameter of 3 to 5 mm and the link chain has a tensile break of 15000 to 40000N. It is characterized by having proof stress.

  According to such a configuration, the link chain as the master rope and the link chain of the connecting member of the tension device can be more reliably prevented from being loosened or broken due to an impact at the time of a fall accident or the like. This can be further improved.

  The invention according to claim 8 is an intermediate rope for operating a load lifted by a lifting machine, wherein the intermediate rope is a link chain, and the link chain is provided with a hook member at one end, and the other A side end portion is provided with the connecting metal fitting according to claim 1.

  According to such a configuration, for example, a ring is formed by using a coupling fitting at the other end portion of one intermediary rope, and a hook member of another intermediary rope is engaged therewith, so that a plurality of intervening ropes are engaged. The ropes can be connected to one without causing a decrease in strength. For this reason, multiple types of interleaving ropes of one type or several types of length are prepared and combined in an appropriate number according to the lifting height to flexibly handle differences in the lifting height. It becomes possible to do.

  In addition, the interleaving line can be formed with a link chain as described above, so that the interleaving line is made especially when handling heavy objects, as compared to the conventional interleaving line made of natural or synthetic fibers, which is easily damaged or broken. Can be prevented from breaking.

  The invention according to claim 9 is the invention according to claim 8, wherein the hook member is formed in a hook shape and includes a hook that engages with the link chain, and the hook is orthogonal to a circumferential direction of the hook. It is characterized in that the inner peripheral surface of the ridge is wider than the outer peripheral surface in the direction to be performed.

  According to such a configuration, it is possible to alleviate acute contact with the counterpart member that hooks the hook member. Moreover, when connecting a plurality of interleaving lines, the movement of the hook member on the interleaving lines can be made smooth. For this reason, the workability | operativity at the time of hooking and engaging the hook member of another intermediate rope with the ring formed using the connection metal fitting in the other side edge part of one intermediate rope, for example can be improved. In addition, since the hook has the above-described shape, the strength of the hook can be improved, and the strength of the entire hook and the strength when the tension of the intermediate rope is loaded at the tip of the hook can also be improved.

  The invention according to claim 10 is the invention according to claim 8 or 9, wherein each link constituting the link chain has a wire diameter of 3 to 5 mmφ, and the link chain has a tensile breaking strength of 15000 to 40000N. It is characterized by that.

  According to such a configuration, it is possible to more reliably prevent the occurrence of an accident such as breakage of the intermediate rope during operation of a heavy object.

  As described above, according to the first aspect of the present invention, it is possible to reliably prevent the link chain from easily coming out of the receiving portion even though the movable member is not provided and the structure is simple. be able to.

  According to the second aspect of the present invention, by adopting the above-described connecting metal fitting, the master rope can be formed by the link chain, and the safety of the master rope device can be further improved than before. .

  According to the invention described in claim 3, after the hook member is smoothly moved on the fixing belt, the fixing belt is wound around the pillar as the fixing portion, and then the hook member is used as the fixing belt. By forming the ring by hooking, workability when attaching to the pillar can be improved. Further, the yield strength of the hook can be improved, and the strength of the entire hook and the strength when the tension of the fixing belt is loaded at the tip of the hook can be improved.

  According to the fourth aspect of the present invention, the master rope and the link chain of the connecting member of the tensioner can be connected easily and reliably. In addition, a plurality of master ropes can be connected to one without causing a decrease in strength to flexibly cope with the difference in length between the fixed portions.

  According to the fifth aspect of the present invention, the hook member is smoothly moved on the master rope, the master rope is wound around the pillar as the fixing portion, and then the hook member is hooked on the master rope to make a ring. The workability at the time of attaching to a pillar can be improved by forming. Moreover, the proof strength of the hook can be improved, and the strength of the entire hook and the strength when the tension of the master rope is loaded at the tip of the hook can also be improved.

  According to the sixth aspect of the present invention, the master rope and the link chain of the connecting member of the tensioner can be connected easily and reliably. Moreover, the connection reliability can be further improved by using both of the connecting brackets of the link chain and the master rope of the connecting member to connect them together.

  According to the seventh aspect of the present invention, the link chain as the master rope and the link chain of the connecting member of the tensioner can be more reliably prevented from being loosened or broken due to an impact at the time of a fall accident or the like. , Safety can be further improved.

  According to the eighth aspect of the present invention, it is possible to flexibly cope with the difference in the lifting height by connecting a plurality of interleaving ropes to one with the above-mentioned connecting metal fitting without causing a decrease in strength. . In addition, the intermediate rope can be formed by a link chain to make it difficult to break.

  According to the ninth aspect of the invention, it is possible to alleviate acute contact with the counterpart member that hooks the hook member. In addition, the hook member can be moved smoothly on the intermediate rope, and the hook member of another intermediate rope can be hooked and engaged with the ring formed using the connecting bracket on the other end of the intermediate rope. It is possible to improve the workability at the time of performing. In addition, the strength of the hook can be improved, and the strength of the entire hook and the strength when the tension of the intermediate rope is loaded at the tip of the hook can also be improved.

  According to the tenth aspect of the present invention, it is possible to more reliably prevent the occurrence of an accident that the interleaving rope breaks during operation of a heavy object.

  FIG. 1 is a perspective view showing an embodiment of a connection fitting of the present invention. 2 is a plan view thereof, and FIG. 3 is a cross-sectional view taken along line AA of FIG.

  In FIG. 1, the connecting metal 1 is attached to a link 3 at the end of a link chain 2 and used to connect to the same or another link chain 4 (see, for example, FIGS. 4 and 5).

  The connection fitting 1 is integrally provided with an attachment portion 5 for attachment to the link 3 at the end of the link chain 2 and a receiving portion 6 for receiving the link chain 4 to be connected.

  Of these, the attachment portion 5 is for inserting a pair of attachment members 7 and 8 disposed opposite to each other at a predetermined interval, and the link 3 at the end of the link chain 2 provided between the attachment members 7 and 8. The slit 9 is provided. Further, through holes 10 and 11 are formed in both mounting members 7 and 8 so as to pass through bolts 12 for mounting the links 3.

  Then, in a state in which the link 3 is inserted through the slit 9, the bolt 12 is inserted through the through hole 10, the link 3, and the through hole 11 from the attachment member 7 side, for example, and then protruded toward the attachment member 8 side. The connection fitting 1 is configured to be attached to the link 3 at the end of the link chain 2 by tightening a nut 13 at the tip of 12 (see FIGS. 1, 4, and 5).

  In addition, the axial part of the volt | bolt 12 is formed in the cross-sectional flat shape so that it can penetrate in the link 3. As shown in FIG.

  The receiving unit 6 includes an insertion unit 16 provided with a slit 15 for inserting the vertical link 14 of the link chain 4 and a horizontal link connected to the vertical link 14 in a state where the vertical link 14 is inserted into the slit 15. And a receiving portion 18 that is engaged with the link 17.

  Further, the receiving portion 18 has a flat receiving surface 19 with which the horizontal link 17 following the vertical link 14 abuts in the state where the vertical link 14 is inserted into the slit 15, and the horizontal direction ( From a pair of side walls 20, 21 for restricting the lateral movement of the lateral link 17 raised from both sides and one side end of the side walls 20, 21. And a pair of end walls 22 and 23 formed continuously inward in the left-right direction so as to go around in the pulling direction of the link chain 4 (the direction indicated by the solid line arrows in FIGS. 4 and 5). .

  Further, the receiving surface 19 of the receiving portion 18 is provided with a pair of magnets 24 and 25 as fixed portions for contacting the lateral link 17 and holding it by magnetic force. Both the magnets 24 and 25 are arranged opposite to each other with the slit 9 interposed therebetween, and are embedded in the receiving surface 19 so that the contact surface with the lateral link 17 is flush with the receiving surface 19.

  Both end walls 22 and 23 are formed in a curved shape in accordance with the planar shape of the end portion of the lateral link 17, and as shown in FIG. Inclined in the direction opposite to the pulling direction (to the right of the paper surface), it is formed so as to cover the receiving surface 19. And the connection part with the receiving surface 19 is formed in the curved surface match | combined with the wire diameter of the horizontal link 17, and when the force of the said tension | pulling direction is added to the link chain 4, the horizontal link 17 is received and this is received. Lock.

  For this reason, for example, even when a force exceeding the magnetic force of both the magnets 24 and 25 to peel off the lateral link 17 is applied to the link chain 4 in the upper right direction of the page, the lateral links 17 are locked by the both end walls 22 and 23. Is not released, and the link chain 4 can be prevented from coming out of the receiving portion 6.

  Further, the slit 15 described above is provided in a region extending from between the both end walls 22 and 23 to the subsequent receiving surface 19, and this is the insertion portion 16 for inserting the vertical link 14.

  In order to connect the link chain 4 using the connecting fitting 1, as shown in FIGS. 4 and 5, an arbitrary vertical link 14 of the link chain 4 is inserted into the slit 15, and the vertical link 14 is connected to the vertical link 14. The connected lateral link 17 is accommodated in a receiving portion 18 including a receiving surface 19 and both side walls 20 and 21 and both end walls 22 and 23 surrounding the receiving surface 19. Then, when a pulling force in the direction indicated by the solid arrow in both figures is applied to the link chain 4, the lateral link 17 is locked by the both end walls 22, 23 and received by the both magnets 24, 25. Held in the part 6. For this reason, according to this connection metal fitting 1, it is possible to reliably prevent the link chain 4 from being easily pulled out from the receiving portion 6, although the movable member is not provided and the structure is simple.

  FIG. 6 is an explanatory view showing an embodiment of the master rope device of the present invention using the connection fitting 1. FIG. 7 is a perspective view of a master rope used in the master rope device, and FIG. 8 is a perspective view of a tensioner.

  6, the master rope device 26 includes a master rope 31 for attaching a safety belt 30 attached to a belt of an operator 29 between a pair of pillars 27 and 28 as a pair of fixing portions, and the master rope 31. A tensioner 32 for tensioning between the columns 27 and 28 is provided.

  The master rope 31 includes a link chain 33, a hook member 34 for attaching the master rope 31 to the column 27, connected to one end of the link chain 33, and a connecting metal fitting 1 connected to the other end of the link chain 33. It has.

  The master rope 31 is attached to the pillar 27 by winding a part of the link chain 33 on the hook member 34 side around the pillar 27 and then hooking the hook member 34 on the link chain 33 to form a ring. Further, as indicated by a two-dot chain line in FIG. 6, a mounting bracket 35 may be mounted on the column 27, and a hook member 34 may be hooked on the mounting bracket 35 to mount the master rope 31 to the column 27.

  Further, a fixing belt 36 is connected to the tensioner 32, and a hook member 34 is connected to the tip of the fixing belt 36, and an attachment member 56 for attaching the tensioner 32 to the column 28 is configured.

  The tensioner 32 is attached to the pillar 28 by winding the fixing belt 36 around the pillar 28 and then hooking the hook member 34 onto the fixing belt 36 to form a ring. Further, as indicated by a two-dot chain line in FIG. 6, a mounting bracket 35 may be mounted on the column 28, and a hook member 34 may be hooked on the mounting bracket 35 to mount the tensioner 32 to the column 28.

  The tensioner 32 has a connection member 37 for connecting to the master rope 31. The connection member 37 includes a link chain 38 wound around the tensioner 32, the connecting fitting 1 connected to one side end (load side end) of the link chain 38, and the other side end (no load side end). And a small hook 39 connected to the portion).

  Although not shown in the drawings, the tensioner 32 is a load sheave around which the link chain 38 is wound, a drive member that drives the load sheave, an operation lever that is attached to and detached from the drive member, and a tension ( There is a conventionally known tensioner (lifter) having a mechanical brake that transmits only rotation in the direction of the hoisting) to the load sheave, drives the load sheave in the same direction, and prevents rapid rotation in the reverse direction of the load sheave. Used.

  When the tensioning device 32 operates the attached operating lever to rotate the drive member in the tension direction, the load sheave rotates in the same direction via the mechanical brake, and the link chain 38 is lifted in the tension direction to lift the parent chain. When the rope 31 is tensioned and the operation lever is operated to rotate the drive member in the direction opposite to the tension direction, the mechanical brake operates, so that the load sheave gradually rotates in the opposite direction, and the link chain 38 is slightly moved. The tension of the master rope 31 is released slowly by feeding it out one by one.

  The small hook 39 prevents the unloaded link chain 38 from being fed into the tensioner 32 even if the mechanical brake is loosened by force or intentionally, and the link chain that tensions the master rope 31. 38 is used as a stopper to prevent loosening. In addition, the small hook 39 hangs the tip of the link chain 38 on its way so that the tip of the unloaded link chain 38 lifted by the tensioner 32 hangs down and does not interfere with the movement of the operator 29. It is also used for hooking on.

  7 and 8, the hook member 34 is a belt formed in a ring shape at the base portion, at the link 57 33 at one end of the link chain 33 of the master rope 31 or at the end of the fixing belt 36. A hook-like hook 60 provided with a ring-shaped attachment portion 59 to which the link 58 is engaged, and the hook 60 in the vicinity of the attachment portion 59 via a pin 61, that is, the inside of the flange, that is, in FIG. A closing member 62 for closing the hook opening of the hook 60, which is rotatably mounted in the clockwise direction from the state and in the counterclockwise direction from the state in FIG. 8, and the closing member 62 locked in the closed state shown in both figures And a locking member 63 to be used.

  The hook 60 is formed in a cross-sectional shape in which the inner peripheral surface 64 of the hook is wider than the outer peripheral surface 65 in a direction orthogonal to the peripheral direction of the hook. Specifically, the hook 60 having a substantially constant thickness in the circumferential direction of the ridge is bulged in a direction orthogonal to the circumferential direction of the ridge on both side surfaces on the inner circumferential surface 64 side of the curved portion of the ridge. The bulging portion 66 is integrally provided, and its cross section is substantially T-shaped as shown in FIG.

  Thereby, the movement of the hook member 34 on the link chain 33 of the master rope 31 or the fixing belt 36 can be made smooth. For this reason, as shown in FIG. 6, the workability at the time of attaching to the pillar 27 can be improved by forming the ring by hooking the hook member 34 on the link chain 33 after winding the link chain 33 around the pillar 27. In addition, after the fixing belt 36 is wound around the pillar 28, the hook member 34 is hooked on the fixing belt 36 to form a ring, so that the workability when attaching to the pillar 28 can be improved.

  Further, by providing and reinforcing the bulging portion 66, the proof strength of the hook 60 is improved, and the overall strength and the strength when the tension of the master rope 31 and the fixing belt 36 are loaded at the tip of the hook are improved. You can also

  In this example, the bulging portion 66 has a closing member 62 described below on both the base side where the mounting portion 59 is formed and the distal end side of the heel in order to obtain the above-described effect to the maximum. However, it is extended to the very close position which does not contact the front-end | tip of the closure member 62 outside the rotation radius rotated centering on the pin 61. FIG.

  The closing member 62 is biased in a counterclockwise direction in FIG. 7 and a clockwise direction in FIG. 8 by a spring (not shown) around the pin 61, and the hook 60 is ring-shaped as shown in both figures. Locked in a closed state. Although not shown in detail, the tip of the hook of the hook 60 biased by the spring is locked to the outer surface of the tip of the closing member 62 to prevent further rotation. In this state, the end of the locking claw 67 protruding in the other direction from the closing member 62 at an angle of about 90 ° about the pin 61 engages with the pin 68 provided on the locking member 63, thereby The rotation of 62 in the direction opposite to the biasing direction by the spring is also prevented. Accordingly, the closing member 62 is locked in a closed state in which the hook 60 is closed in a ring shape.

  The lock member 63 is rotatably attached to the hook 60 at a position between the attachment portion 59 and the bulging portion 66 via a pin 69, and is centered on the pin 69 by a spring (not shown). 7 is biased in the clockwise direction and in FIG. 8 in the counterclockwise direction, and is held at the position shown in both figures. In this holding state, as described above, the tip of the locking claw 67 of the closing member 62 engages with the pin 68 to lock the closing member 62.

  In order to release the lock, the pin 69 is moved against the urging force of the spring by holding the part of the lock member 63 on the bulging portion 66 side and the closing member 62 by hand. As a center, it is rotated counterclockwise in FIG. 7 and clockwise in FIG. 8 to release the engagement between the tip of the lock claw 67 and the pin 68. Then, the closing member 62 can be rotated against the biasing force of the spring around the pin 61 in the inner side of the bag, that is, in the clockwise direction in FIG. 7 and in the counterclockwise direction in FIG. The closing state of the hook 60 by the closing member 62 is released.

  In FIG. 6, the link chain 33 of the master rope 31 and the link chain 38 wound around the tensioner 32 are connected to the respective link fittings 1, 1 connected to the respective end portions of the link chain 33, 38. Are connected to each other. Thereby, both link chains 33 and 38 can be connected reliably.

  However, since only one connecting fitting 1 can connect both link chains 33 and 38 with sufficient strength, for example, as shown in FIG. 10, only the connecting fitting 1 on the link chain 38 side of the tensioner 32 is used. The link chains 33 and 38 may be connected to each other. Further, although not shown, only the connection fitting 1 on the link chain 33 side of the master rope 31 may be used for connecting both the link chains 33 and 38.

  Further, for example, as shown in FIG. 11, the connection fitting 1 is provided only on the link chain 38 side of the tensioner 32, and the connection fitting 1 on the link chain 33 side of the master rope 31 is omitted, or conversely, FIG. As shown in FIG. 4, the connecting fitting 1 can be provided only on the link chain 33 side of the master rope 31 and the connecting fitting 1 on the link chain 38 side of the tensioner 32 can be omitted.

  10 to 12, parts other than those described above are configured in the same manner as in the example of FIG. 6. Therefore, the same members are denoted by the same reference numerals and description thereof is omitted.

  Although not shown in the figure, a hook member 34 is connected to one end of the link chain 33, the main rope 31 is connected to the connecting fitting 1 at the other end, and a hook member is connected to the one end (load side end). The connecting chain 1 of the master rope 31 attached to the column 27 using the hook member 34 is used as an arbitrary link of the link chain 33 of the master rope 31 using the link chain 38 to which the pipe 34 is connected. The link chains 33 and 38 may be connected by forming a ring by connecting them and hooking the hook member 34 on the link chain 38 side thereto.

  Alternatively, the link chain 33 has a hook member 34 connected to one end portion thereof, the master rope 31 connected to the connection fitting 1 to the other end portion, and the link chain having the connection fitting 1 connected to one end portion (load side end portion). The end of the link chain 33 on the side to which the connection fitting 1 is connected is wrapped around the column 27 or passed through the attachment fitting 35, and then the connection fitting 1 is connected to an arbitrary link of the link chain 33 to form a ring. To form the ring by connecting the connecting fitting 1 of the link chain 38 to an arbitrary link of the link chain 38, and hooking the hook member 34 on the link chain 33 side to the ring. Thus, both link chains 33 and 38 may be connected.

  Moreover, although not shown in figure, the master rope 31 which connected the connection metal fitting 1 to the other side edge part of the link chain 33 connects the said connection metal fitting 1 to the arbitrary links of the link chain 33, forms a ring, A plurality of master ropes 31 can be coupled by hooking a hook member 34 connected to one end of another master rope 31. For this reason, as described above, if a plurality of master ropes 31 of one type or several types of lengths are prepared and combined in an appropriate number, the length between the pillars 27 and 28 is increased. It is possible to flexibly cope with the difference.

  For example, if three kinds of master ropes 31 having lengths of 6 m, 8 m, and 10 m are prepared, 6 + 6 = 12 m, 6 + 8 = 14 m, only when connecting the two master ropes 31 in addition to the three kinds of lengths. Five lengths of 8 + 8 = 16 m, 8 + 10 = 18 m, and 10 + 10 = 20 m can also be accommodated.

  Each link chain 33 and 38 has a link diameter of 3 to 5 mm and is stipulated by Japanese Industrial Standards JIS B8812: 1999 “Chain Block Link Chain” and JIS B8816: 1998 “Winding Chain Sling”. Those having a tensile strength at breakage of 15,000 to 40,000 N based on the measured method are used. By using such link chains 33 and 38, it is possible to more reliably prevent the link chains 33 and 38 from being loosened or broken due to an impact at the time of a fall accident or the like, thereby further improving safety. be able to.

  Further, if the wire diameter of the link is less than 3 mmφ, the tensile breaking strength of each link chain 33, 38 may not be improved to the above range. Conversely, if it exceeds 5 mmφ, each link chain 33, 38 is large, In addition, since the connecting metal fitting 1 for connecting the link chains 33 and 38 and the tensioner 32 for lifting are enlarged, the handleability of the master rope device 26 may be reduced.

  In addition, when the tensile breaking strength of each link chain 33, 38 is less than 15000 N, the parent rope 31 is formed between the pair of columns 27, 28 with a tension force stronger than before by using each link chain 33, 38. There is a possibility that the effect of improving the safety by tensioning may be insufficient, and conversely, if it exceeds 40000N, each link chain 33, 38 becomes large and heavy, and the handling property of the master rope device 26 is also reduced. May decrease.

  In addition, since each link chain 33 and 38 is mainly used outdoors, the surface may be subjected to surface rust prevention treatment (thickness of about 5 to 8 μm) by zinc plating, electroless plating, or the like. Further, in order to improve the slipperiness and improve the workability of winding around the pillars 27 and 28 and the lifting by the tensioner 32, the surface thereof may be subjected to fluororesin processing (thickness of about 15 μm). Good.

  Although the specific specification of the master rope device 26 is not limited to this, for example, as each of the link chains 33 and 38, an ultra-strong chain having a wire diameter of 4.3 mmφ and a tensile breaking strength of 29000 N or more. , And the span between 6 and 10 m between the pair of pillars 27 and 28, the tension force of lifting the main rope 31 by the tensioner 32 is 490 to 2450N. Thereby, when a fall accident occurs, the amount of drooping of the master rope 31 can be made as small as possible to suppress the occurrence of a secondary disaster or the like.

  For example, the link chains 33 and 38 having the above specifications are regarded as an operator in a state where the tension force is set to 980 N between the pair of columns 27 and 28 having a span of 10 m by the tensioner 32. The maximum droop amount of the master rope 31 when an 85 kg fall object was dropped was measured to be within 500 mm. This value is about 1/4 of the normal droop amount of the master rope, and the normal installation height. Since it is smaller than (0.9 to 1.8 m), it was confirmed that the occurrence of a secondary disaster can be prevented even if a fall accident occurs.

  At this time, the maximum impact value applied to the master rope 31 is 4500 N or less, and this value is much smaller than the tensile breaking strength (= 29000 N or more) of each link chain 33, 38. It was also confirmed that the link chains 33 and 38 were not likely to break.

  Therefore, according to the master rope device 26, the safety can be further improved than before.

  FIG. 13 is an explanatory view showing an embodiment of the intermediate rope of the present invention using the connection fitting 1. FIG. 14 is an explanatory view showing a state in which two intermediate ropes are connected using the connecting fitting 1, and FIG. 15 is an enlarged partial cross-sectional view of the connection part of the two intermediate ropes.

  In FIG. 13, the interlining rope 40 is for interposing an H-shaped steel 43 as a load lifted via two lifting chains 42 by a lifting machine hook 41. Each lifting chain 42 has its upper end locked to the hook 41 via the master link 55 and its lower end via each lifting tool 47 arranged in a hook shape with respect to the longitudinal direction of the H-shaped steel 43. Locked to the H-shaped steel 43.

  The intermediate rope 40 includes a link chain 44, a hook member 46 connected to one end portion of the link chain 44 for hooking the intermediate rope 40 into the hole 45 of the H-shaped steel 43, and the other end portion of the link chain 44. And a connecting metal fitting 1 connected to the.

  When the lifting height of the H-shaped steel 43 is low, it can be intervened with one interleaving rope 40 as shown in FIG. However, when the lifting height is high and cannot be interspersed with one interlacing rope 40, as shown in FIGS. 14 and 15, the connecting fitting 1 at the other end of the link chain 44 of the first interlining rope 40 is attached. , By connecting to an arbitrary link of the link chain 44 to form a ring, and hooking a hook member 46 connected to one end of another intermediate rope 40 to connect the multiple intermediate ropes 40 Can do.

  For this reason, if a plurality of interleaving ropes 40 of one kind or several kinds of lengths are prepared and combined in an appropriate number, the difference in the lifting height can be flexibly dealt with.

  For example, if three kinds of interleaving ropes 40 having lengths of 3 m, 4 m, and 5 m are prepared, 3 + 3 = 6 m, 3 + 4 = 7 m only in the case of connecting two meso ropes 40 in addition to the three kinds of heights. Five heights can be accommodated: 4 + 4 = 8 m, 4 + 5 = 9 m, and 5 + 5 = 10 m.

  The link chain 44 has a wire diameter of 3 to 5 mmφ and a tensile breaking strength of 15000 to 40000 N based on the measurement method defined in the above-mentioned Japanese Industrial Standard. By using such a link chain 44, it is possible to more reliably prevent the occurrence of an accident in which the intermediate rope 40 is broken when a heavy object is operated.

  Also, if the link wire diameter is less than 3 mmφ, the tensile breaking strength of the link chain 44 may not be improved to the above range. Conversely, if the link chain diameter exceeds 5 mmφ, the link chain 44 is large and heavy, and the intervening is difficult. The handleability of the rope 40 may be reduced.

  Moreover, if the tensile breaking strength of the link chain 44 is less than 15000 N, there is a possibility that the effect of using the link chain 44 to make the intermediate rope 40 less likely to break than before may be insufficient. In the case of exceeding the range, the link chain 44 becomes large and heavy, and there is a possibility that the handling property of the interlacing rope 40 is lowered.

  Since the link chain 44 is mainly used outdoors, the surface thereof may be subjected to surface rust prevention treatment (thickness of about 5 to 8 μm) by zinc plating, electroless plating, or the like, as described above.

  And according to this intermediate rope 40, the multiple intermediate rope 40 can be connected with one by the connection metal fitting 1, and it can respond flexibly to the difference in lifting height. Further, the intermediate rope 40 can be formed by the link chain 44 so that it is difficult to break.

  In addition, as the hook member 46, the thing similar to the hook member 34 used with the previous master rope apparatus 26 can be used. That is, as shown in FIG. 15, the hook member 46 has a hook-like hook provided with a ring-shaped attachment portion 59 to which the link 70 at one end of the link chain 44 of the intermediate rope 40 is engaged. 60 and the hook 60 in the vicinity of the attachment portion 59 of the hook 60, which is attached via a pin 61 so as to be able to rotate inwardly, that is, counterclockwise from the state of FIG. A closing member 62 that closes the opening and a locking member 63 that locks the closing member 62 in the closed state shown in FIG.

  The hook 60 is formed in a cross-sectional shape in which the inner peripheral surface 64 of the hook is wider than the outer peripheral surface 65 in a direction orthogonal to the peripheral direction of the hook. Specifically, the hook 60 having a substantially constant thickness in the circumferential direction of the ridge is bulged in a direction orthogonal to the circumferential direction of the ridge on both side surfaces on the inner circumferential surface 64 side of the curved portion of the ridge. The bulging portion 66 is integrally provided, and its cross section is substantially T-shaped as shown in FIG.

  Thereby, the acute contact with respect to the other party of the hook member 46, that is, in the present embodiment, to the hole of the H-shaped steel 43 can be alleviated. The counterpart is not limited to the H-shaped steel 43 but includes a chain, a rope, an eyebolt hole, a single pipe, and the like. Moreover, the movement of the hook member 46 on the link chain 44 of the intermediate rope 40 can be made smooth. For this reason, as shown in FIG. 15, when the hook member 46 of another intermediate rope 40 is hooked and engaged with the ring formed by using the connection fitting 1 at the other end of the intermediate rope 40. Workability can be improved.

  Further, by providing and reinforcing the bulging portion 66, it is possible to improve the yield strength of the hook 60 and to improve the overall strength and the strength when the tension of the intermediate rope 40 is loaded at the tip of the hook.

  In this example, the bulging portion 66 has a closing member 62 described below on both the base side where the mounting portion 59 is formed and the distal end side of the heel in order to obtain the above-described effect to the maximum. However, it is extended to the very close position which does not contact the front-end | tip of the closure member 62 outside the rotation radius rotated centering on the pin 61. FIG.

  The closing member 62 is urged in a clockwise direction in FIG. 15 by the spring (not shown) around the pin 61, and is locked in a closed state in which the hook 60 is closed in a ring shape as shown in FIG. . Specifically, the tip 71 of the hook of the hook 60 biased by the spring is locked to the outer surface of the tip of the closing member 62 to prevent further rotation, and in this locked state, the closing member The tip of the lock claw 67 protruding in another direction at an angle of about 90 ° from the pin 61 is engaged with the pin 68 provided on the lock member 63, so that the closing member 62 is spring-loaded. The rotation in the direction opposite to the biasing direction is also prevented. Accordingly, the closing member 62 is locked in a closed state in which the hook 60 is closed in a ring shape.

  The lock member 63 is rotatably attached to the hook 60 at a position between the attachment portion 59 and the bulging portion 66 via a pin 69, and is centered on the pin 69 by a spring (not shown). 15 is biased counterclockwise and held at the position shown in both figures. In this holding state, as described above, the tip of the locking claw 67 of the closing member 62 engages with the pin 68 to lock the closing member 62.

  In order to release the lock, the pin 69 is moved against the urging force of the spring by holding the part of the lock member 63 on the bulging portion 66 side and the closing member 62 by hand. As a center, it is rotated in the clockwise direction in FIG. 15 to release the engagement between the tip of the lock claw 67 and the pin 68. Then, the closing member 62 can be rotated about the pin 61 against the biasing force of the spring inwardly of the bag, that is, in the counterclockwise direction in FIG. The 60 closed state is released.

  The hanging tool 47 has a hole 49 in which a hook 48 provided at the tip of the hooking tool 42 is hooked, and an insertion part 51 that has an engaging projection at the tip and is inserted into the hole 50 of the H-shaped steel 43. A main body 52, a wedge-shaped slide member 53 that is slidable in the insertion direction with respect to the insertion portion 51, and a stopper bolt 54 that is provided so as to be extended in the insertion direction with respect to the suspension body 52. I have.

  Then, the slide member 53 is slid in the insertion direction with respect to the insertion portion 51 inserted into the hole 50, and the total thickness of both is substantially the same as the inner diameter of the hole 49. The slide member 53 is fixed in a state where it is applied from below, and then the stopper bolt 54 is fed out, and the edge of the hole 49 is sandwiched between the engaging projection and the H-shaped steel 43 is fixed.

It is a perspective view which shows one Embodiment of the coupling metal fitting of this invention. It is a top view of the connection metal fitting shown in FIG. It is the sectional view on the AA line of FIG. It is a perspective view which shows the state which connected the link chain using the connection metal fitting shown in FIG. It is a fragmentary sectional view in alignment with the length direction of a link chain of FIG. It is explanatory drawing which shows one Embodiment of the master rope apparatus of this invention using the connection metal fitting of this invention. It is a perspective view of the master rope used for the master rope apparatus of FIG. It is a perspective view of the tension device used for the master rope apparatus of FIG. It is sectional drawing of the hook of a hook member. It is explanatory drawing which shows the modification of a master rope apparatus. It is explanatory drawing which shows the modification of a master rope apparatus. It is explanatory drawing which shows the modification of a master rope apparatus. It is explanatory drawing which shows one Embodiment of the intervention rope of this invention using the connection metal fitting of this invention. It is explanatory drawing which shows the state which connected the two interleaving ropes of FIG. It is the fragmentary sectional view which expanded the connection part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Connection metal fitting 2, 4, 33, 38, 44 Link chain 6 Receiving part 14 Vertical link 15 Slit 16 Insertion part 17 Lateral link 18 Receiving part 24, 25 Magnet 26 Parent rope apparatus 31 Parent rope 32 Tensioner 34 Hook member 36 Fixing Belt 37 connection member 40 intermediate rope 46 hook member 56 mounting member 60 hook 64 inner peripheral surface 65 outer peripheral surface

Claims (10)

In connecting brackets that connect link chains that connect vertical links and horizontal links alternately,
A receiving portion that receives the link chain; and a fixing portion that is provided in the receiving portion and fixes the link chain;
The receiving portion is connected to the inserted vertical link in a state where the insertion portion provided with a slit through which the vertical link of the link chain is inserted, and the vertical link is inserted into the slit of the insertion portion, A receiving portion that is in contact with the lateral link of the link chain,
The fixing bracket is a connecting metal fitting that is in contact with the horizontal link in the receiving portion and holds the horizontal link by magnetic force. In a master rope device comprising a master rope for attaching a safety belt and a tensioner for tensioning the master rope between a pair of fixing parts,
The tensioner includes an attachment member attached to one fixed portion, and a connection member connected to the master rope,
The connecting member comprises a link chain wound around a tensioner;
The master rope is a link chain;
The master rope device, wherein the connecting member and the master rope are connected by the connecting metal fitting according to claim 1. The attachment member includes a fixing belt whose one end is connected to a tensioner, and a hook member attached to the other end of the fixing belt,
The hook member is formed in a hook shape and includes a hook that engages with the fixing belt,
The master rope device according to claim 2, wherein the hook has an inner peripheral surface wider than an outer peripheral surface in a direction orthogonal to a circumferential direction of the heel. 4. The master rope device according to claim 2, wherein the master rope includes a hook member that is attached to the other fixing portion at one end portion, and the connection fitting at the other end portion. . The hook member is formed in a hook shape and includes a hook that engages with the master rope,
5. The master rope device according to claim 4, wherein the hook has an inner peripheral surface wider than an outer peripheral surface in a direction orthogonal to a circumferential direction of the heel. The master rope device according to any one of claims 2 to 5, wherein the link chain of the connecting member includes the connecting metal fitting. The master rope device according to any one of claims 2 to 6, wherein a wire diameter of each link constituting the link chain is 3 to 5 mmφ, and the link chain has a tensile breaking strength of 15000 to 40000N. . An interleaving rope for operating luggage lifted by a lifting machine,
The interlacing rope is a link chain,
The link chain is provided with a hook member at one end, and the connecting fitting according to claim 1 at the other end. The hook member is formed in a bowl shape and includes a hook that engages with the link chain;
The interleaving rope according to claim 8, wherein the hook has an inner peripheral surface wider than an outer peripheral surface in a direction orthogonal to a circumferential direction of the flange. 10. The interleaving rope according to claim 8, wherein a wire diameter of each link constituting the link chain is 3 to 5 mmφ, and the link chain has a tensile breaking strength of 15000 to 40000N.

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