JP5592642B2 - Tension rope connecting method and jib connecting method in boom working vehicle with jib provided with boom lateral deflection suppressing device - Google Patents

Description

  The present invention relates to a tension rope connecting method and a jib coupling method in a boom working vehicle with a jib equipped with a boom lateral deflection suppressing device. In addition, although the mobile crane is mainly employ | adopted for the boom working vehicle with a jib which is made into object by this application, the aerial working vehicle with a jib can also be made into object.

  The present applicant has already proposed Japanese Patent Application No. 2009-57228 (Patent Document 1) as a jib-equipped boom working vehicle equipped with a boom lateral deflection suppressing device. In addition, the boom working vehicle with a jib of this patent document 1 employs a mobile crane.

  As shown in FIGS. 14 to 16, the boom working vehicle with jib (mobile crane) of the already-applied application has a telescopic boom 3 mounted on a swivel 2 on a vehicle 1 so as to be able to be raised and lowered. The jib 4 can be added to the section (boom head) 34 and used. In the boom working vehicle with jib shown in FIG. 14, a telescopic boom 3 in which five single booms including a base end boom 31, three intermediate booms 32, and a tip boom 33 are connected in a telescopic manner is employed. As the jib 4, a base end jib 41, two intermediate jibs 42, and four single jibs composed of a distal end jib 43 are connected in a telescopic manner.

  A jib support 40 is attached to the base end of the telescopic jib 4, and the telescopic jib 4 is removably connected to a boom tip (boom head) 34 via the jib support 40. A tilt cylinder 46 for tilting the telescopic jib 4 is interposed between the jib support 40 and the base end jib 41.

  Moreover, the boom working vehicle with a jib of the already-filed application (FIGS. 14 to 16) is provided with a device (boom lateral deflection suppressing device) for suppressing lateral deflection of the telescopic boom 3 during crane work. It should be noted that the lateral bending of the telescopic boom 3 is likely to occur when the telescopic boom 3 is greatly raised, and when the telescopic boom 3 is laterally deflected, the telescopic boom 3 is reduced in strength and the lifting performance is low. There is a problem of becoming.

  The boom lateral deflection suppressing device employed in this already-filed boom working vehicle with a jib is a rope support support 5 that protrudes by a predetermined length on each of the left and right sides of the base end (jib support 40) of the telescopic jib 4. 5, the right and left tension ropes 6 and 6 connected to the outer ends 5a and 5a (FIG. 16) of the rope support supports 5 and 5, respectively, and the feeding length of the tension ropes 6 and 6 are adjusted. Left and right rope length adjusting devices 7 and 7 are provided.

  Each of the rope support supports 5 and 5 has such a length that its outer end portions 5a and 5a protrude outward by about 3 m from the center of the jib.

  Further, in the boom lateral deflection suppressing device employed in the boom working vehicle with the jib of the already-filed application (FIGS. 14 to 16), the left and right rope support supports 5 and 5 are provided at the jib base end portion (jib support 40). The outer ends 5a, 5a of the rope support supports 5, 5 and the positions separated from the jib tip side by a predetermined length on the left and right side surfaces of the base end jib 41 are connected by connecting members 8, 8, respectively. ing. In this way, when the rope support support outer ends 5a and 5a and the side surfaces of the base end jib 41 are connected by the connecting members 8 and 8, respectively, lateral bending of the telescopic boom 3 can be suppressed and the base end of the telescopic jib 4 can be suppressed. The function which can also suppress lateral deflection on the part side occurs. If the lateral deflection of the telescopic boom is to be suppressed, the rope support supports 5 and 5 can be attached to the left and right sides of the boom tip (boom head 34). In the case where the supports 5 and 5 are attached to the jib base end portion (the jib support 40), there is an advantage that the lateral deflection on the jib base end side can be suppressed by using the connecting members 8 and 8.

  Left and right masts 9 and 9 having a considerable length (about 9 to 10 m) are attached to the distal end portion of the proximal end boom 31 so as to be raised and lowered. The masts 9 and 9 are used in a state where the masts 9 and 9 are raised to an angle of approximately 90 ° with respect to the proximal end boom 31.

  The distance between the upper ends of the masts 9, 9 (each sheave 9a, 9a for winding the tension rope) is about 1.7 to 1.8 m. The tension ropes 6 and 6 are suspended from the upper ends (the sheaves 9a and 9a) of the masts 9 and 9, respectively. Accordingly, the outer end portions 5a and 5a of the rope support supports 5 and 5 protrude slightly more than 2 m outward from right below the upper end portions (the sheaves 9a and 9a) of the masts 9 and 9, respectively.

  A winch is used for each of the rope length adjusting devices 7, 7. The winches 7 and 7 are attached to the left and right masts 9 and 9, respectively, so that the extension lengths of the tension ropes 6 and 6 can be adjusted by the winches 7 and 7 according to the degree of extension of the telescopic boom 3. I have to.

  The telescopic boom lateral deflection suppressing device employed in the already-filed boom-equipped boom working vehicle has the right and left tension ropes 6, 6 respectively connected to the rope length adjusting devices 7, 7 (each winch) during crane work. ), The telescopic boom tip 34 is restrained from being bent left and right (laterally bent) via the left and right rope support supports 5 and 5.

  The boom working vehicle with jib shown in FIGS. 14 to 16 adopted as the prior art of the present application is also used in the embodiment of the present application, and other configurations of the boom working vehicle with jib are described in the section of the present embodiment. There is a part that will be explained further.

  By the way, in the boom working vehicle with a jib provided with the boom lateral deflection suppressing device of the already-filed application, the jib 4 is connected to the boom tip 34 as shown in FIGS.

  First, as shown in FIG. 17, with the telescopic jib 4 horizontally placed on the ground, the boom working vehicle is stopped so that the boom tip end 34 is positioned near the upper end of the jib base end (jib support 40). . At this time, the vehicle 1 is stopped so that the axis of the telescopic boom 3 is positioned substantially linearly in plan view with respect to the axis of the jib 4 in a state where the telescopic boom 3 is reduced to the minimum and lying down to a substantially horizontal posture. Further, both the masts 9 are raised to a substantially vertical posture by the mast hoisting cylinder 10. At this time, in order to prevent the jib base end (jib support 40) from interfering with the boom tip (boom head 34) when the jib 4 is lifted from the horizontal position, the base end surface of the jib support 40 The front end surface of the boom head 34 is separated from the tip end surface by a slight distance. In this state, the mast 9 attached to the distal end portion of the proximal boom 31 is positioned rearward from the distal end surface of the boom distal end portion (boom head) 34, so that the mast 9 is placed horizontally with the upper end portions of the masts 9, 9. The imaginary lines connecting the outer ends of the rope support supports 5 and 5 of the telescopic jib 4 are inclined forward and outward by a considerable angle as shown in FIGS. 17 and 18.

  And in the thing provided with the boom lateral deflection suppression apparatus, as preparation before connecting a jib base end part (jib support 40) to a boom tip part (boom head 34), the right and left tension ropes 6 and 6 on the boom side are provided. Are connected to the outer ends (brackets 56 and 56 in FIG. 16) of the left and right rope support supports 5 and 5 on the jib side. As shown, the tip end portion (connector 60) of the tension rope 6 hung down from the upper part of the mast 9 in a natural state is considerably separated from the outer end portion (bracket 56) of the rope support support 5 in the front-rear and left-right directions in the horizontal direction. ing. Therefore, in order to connect the connection tool 60 at the tip end of the tension rope to the bracket 56 at the outer end portion of the rope support support, the tension rope 6 is moved forward and forward by a considerable angle as indicated by reference numeral 6 'in FIGS. It is necessary to pin-connect the connection tool 60 to the bracket 56 in a state in which it is inclined outward and the inclined posture is maintained.

  By the way, a wire rope having a considerable thickness (for example, a diameter of 30 to 40 mm) is used for the tension rope 6 so as to withstand a high tension, while the connection tool 60 of the tension rope tip 6a also has a considerable weight. Have. Therefore, in the state in which the tension rope 6 is inclined as indicated by reference numeral 6 'in FIGS. 17 and 18, the action of returning to the original (vertical direction) works by the weight of the tension rope 6' and the connection tool 60. .

  And, until the connection tool 60 at the tip of the tension rope is pin-coupled to the bracket 56 at the outer end of the rope support support, the connection tool 60 needs to be maintained in the vicinity of the bracket 56. When the position of the connecting device 60 is to be held by human power, a great deal of labor and personnel for holding the position are required, and the tension rope 6 is going to return to the vertical direction by its own weight. The work is very difficult and dangerous.

  Therefore, the present applicant uses another crane to make the tension rope 6 suspended from the upper part of the mast 9 in the inclined posture as shown by reference numeral 6 'in FIGS. 17 and 18 and to maintain the inclined posture. doing. That is, the connection tool 60 (or the rope near the connection tool) is hooked by the hook F of another crane, and the connection tool 60 'is held in the vicinity of the outer end portion (bracket 56) of the rope support support. .

  In this way, if the hook 60 of the crane is used to hold the position of the connection tool 60 'at the tip of the tension rope in the vicinity of the bracket 56 at the outer end of the rope support support, human power for holding the position is unnecessary. The operation of pin-connecting the connection tool 60 'to the bracket 56 can be performed relatively easily and the risk is reduced. The pin connection between the connection tool 60 ′ and the bracket 56 is sequentially performed on the left and right sides one by one.

  Further, in the boom working vehicle with jib shown in FIG. 17, the tip ends (connectors 60) of the left and right tension ropes 6 and 6 are connected to the outer ends (brackets 56) of the left and right rope support supports 5 and 5, respectively. After that, the jib base end portion (jib support 40) is connected to the boom tip portion (boom head 34). In this case, the applicant applies the entire jib 4 to another crane (tension rope) as shown in FIG. It can be lifted with a crane that can hold the connecting tool 60 'at the tip. That is, the entire jib 4 is lifted by another crane (hook F), and the pin holes of the upper and lower brackets 40a and 40b on the base end surface of the jib support 40 are respectively connected to the boom tip (boom head) 34. By aligning the pin holes of the upper and lower (a pair of left and right) brackets 34a and 34b on the front end surface and inserting the pins into the upper and lower pin holes, the jib 4 is attached to the boom front end (boom head 34). Can be linked to.

  Note that when the jib 4 connected to the boom tip 34 is detached, another crane is used in the reverse order as described above, and the tip ends (connectors 60) of the tension ropes 6 and 6 are further connected. When removing from the outer ends (brackets 56) of the rope support supports 5 and 5, another crane is used in the reverse order.

Japanese Patent Application No. 2009-57228

  By the way, in a boom working vehicle with a jib equipped with a boom lateral deflection suppressing device, as a preparation for connecting the jib base end portion to the boom tip portion, as shown in FIG. 17 and FIG. It is necessary to connect the lower ends of the tension ropes 6 and 6 (connectors 60 and 60) to the outer ends (brackets 56 and 56) of the rope support supports 5 and 5 of the jib 4 placed on the ground. is there.

  At that time, in order to maintain the tension rope 6 in the inclined state (symbol 6 '), a large amount of labor and personnel are required to hold the connection device 60 in the vicinity of the bracket 56 when it is performed manually. At the same time, there has been a problem that the position holding work is dangerous. Further, if the position of the connection tool 60 is to be held by another crane (hook F), it is necessary to transport another crane to the jib connection site, and there is a problem that the procurement cost of the crane is high.

  Further, after connecting the tip ends (connectors 60) of the tension ropes 6 and 6 to the outer ends (brackets 56) of the rope support supports 5 and 5, the jib base ends are coupled to the boom tips. In the case where the entire jib 4 is lifted by a crane (hook F) as shown in FIG. 17, another crane for lifting the jib is required (the cost of the crane is high). .

  Accordingly, the present invention provides, as a preparation for connecting the base end portion of the jib horizontally placed on the ground to the tip portion of the boom, the tip portions of the left and right tension ropes hung from the upper portions of the masts (connectors). ) Is connected to the outer ends of the left and right rope support supports on the jib side, and the operation of bringing the tip of the tension rope close to the outer end of the rope support support is easy and safe by the boom operation of the own boom work vehicle. The first object of the present invention is to provide a tension rope connecting method that can be performed at the same time. On the other hand, after connecting each tension rope tip to each rope support support outer end, the jib base end is connected to the boom tip. It is a second object of the present invention to provide a jib connection method that enables the jib lifting work at the time to be performed by itself without using another crane.

  The present invention has the following configuration as means for solving the above problems. The present invention is directed to a tension rope connection method in a boom working vehicle with a jib equipped with a boom lateral deflection suppressing device and a jib connection method performed after the tension rope connection.

[Invention of Claim 1 of the Present Application]
The invention of claim 1 of the present application uses a jib attached to the distal end portion of the telescopic boom, and has a pair of rope support supports projecting outwardly on the left and right sides of the jib base end portion, and is attached to the base end boom. It includes a boom lateral deflection control device that extends from the top of each mast to the left and right tension ropes and connects the tip of each tension rope to the outer end of each rope support support. In a boom working vehicle with a jib provided with a locking portion that locks the lowered tension rope near the tip of the tip boom, when connecting the base end of the jib horizontally placed on the tip boom to the tip of the tip boom As a preparation, for the method of connecting each tip of the left and right tension ropes hanging from the upper parts of the left and right masts to the outer ends of the rope support supports on the jib side Those were.

  As a boom working vehicle with a jib used in the present application, a mobile crane is mainly adopted, but an aerial working vehicle with a jib can also be targeted.

  This type of boom working vehicle has a telescopic boom mounted on a swivel mounted on a vehicle so that it can be raised and lowered, and the swivel can be swung by swiveling the swivel.

  In many cases, the jib is attached to the tip of the boom generally through a jib support. In this case, the jib support corresponds to the boom tip, and the base end of the jib is transverse to the jib support. It is attached to an axis (becomes a tilt axis). The jib is generally swung up and down (tilted) about the tilt axis by a tilt cylinder interposed between the jib support and the jib base end.

  The boom lateral deflection suppressing device extends from a jib base end (jib support) to a pair of rope support supports protruding left and right, left and right masts attached to the base end boom, and an upper portion of each mast. It has left and right tension ropes and a rope length adjusting device (winch) for adjusting the length of each tension rope.

  The left and right rope support supports provided at the base end of the jib protrude from the jib center line to the left and right outwards by a considerable length (for example, about 3 m).

  On the other hand, the left and right masts provided on the proximal boom are raised and lowered by the raising and lowering cylinders at the proximal end of the proximal boom. In use, each mast is raised and supported up to an angle of approximately 90 ° with respect to the proximal boom. It should be noted that the raising angle of the mast with respect to the base end boom can be used in a forward inclined posture that is appropriately larger than the above 90 ° by an appropriate angle.

  The distance between the upper parts of the left and right masts (positions where the tension ropes are hung down) is about 1.7 to 1.8 m. In a state where the boom center line is positioned on the extension line of the jib center line in plan view The horizontal distance in the left-right direction from each tip of each tension rope hanging down from the top of each mast in the natural state to the outer end of the rope support support is slightly over 2 m. Therefore, if it is going to align the front-end | tip part of each tension rope with each outer-end part of each rope support support in this state, it will be necessary to incline the tension rope of each side largely. In addition, each upper space | interval of both right and left masts is not limited to said 1.7-1.8 m, It can use at various space | intervals.

  The locking portion provided in the vicinity of the tip of the tip boom may be any one that can move the tension rope to the left and right as the boom tip rotates. For example, a locking member different from the constituent members of the boom tip may be used. It can be attached to the boom tip, or an existing part at the boom tip (for example, a sheave on the boom head) can be used.

  Therefore, the tension rope connecting method according to claim 1 of the present application is performed as follows. First, the boom working vehicle is stopped in a state where the upper part of the mast on the boom side can be positioned immediately above the base end of the jib placed horizontally on the ground. In this case, in the tension rope connecting method according to claim 1 of the present application, the boom working vehicle is stopped so that the turning center of the telescopic boom is located substantially on the extension line of the center line of the jib horizontally placed on the ground in a plan view. Is preferred.

  Next, the left and right tension ropes are hung vertically from the top of the mast. At this time, it is preferable that the tip portions of the left and right tension ropes be positioned above the upper end height of the jib rope support support placed horizontally on the ground, but the tip of the tension rope on the side to be connected first The part height may be lowered to a position lower than the upper end height of the rope support support as long as it does not collide with the rope support support. In this case, the tip of the tension rope on the side to be connected later is preferably positioned above the height of the upper end of the rope support.

  In this state, the distance between the outer ends of the left and right rope support supports (positions where the rope ends are connected) is significantly longer than the distance between the left and right ends of the left and right tension ropes. The position of the rope support support to be connected is shifted to the left and right.

  First, in a state where one tension rope is locked to the locking portion, the distal end portion of the one tension rope is moved left and right by turning the telescopic boom, and the outer end portion of the rope support support on the same side Are positioned at substantially the same position in the vertical direction. In this case, the height of the tip of the tension rope on one side (the side to be connected first) may be higher or lower than the height of the upper end of the rope support support. In the case where it is performed in a lower position, the portion near the tip of the tension rope is positioned so as to be joined or close to the outer end of the rope support.

  Subsequently, the feeding length of the tension rope is adjusted (the rope is fed or wound from the winch), and the height of the tension rope tip is adjusted to the height of the outer end of the rope support support. The tension rope tip is connected (pin-coupled) to the rope support support outer end.

  Next, in a state where the other tension rope is locked to the locking portion, the distal end portion of the other tension rope is moved left and right by the turning operation of the telescopic boom, and the outer end portion of the rope support support on the other side , And then adjust the length of the tension rope to be extended (take out or wind the rope from the winch), and adjust the height of the tension rope tip to the rope support support. In accordance with the height of the outer end, the tip end of the tension rope is connected (pin-coupled) to the outer end of the rope support support.

  In addition, after connecting the tip of one tension rope to the outer end of one rope support support, when turning the telescopic boom, sufficiently loosen the tension rope on the connected side (from the winch). The rope is fed out), and the tension rope on the connection side is not excessively tensioned by the turning movement of the distal end of the telescopic boom.

  As described above, when the tension rope connecting method according to claim 1 of the present application is performed, the alignment work when connecting the distal ends of the left and right tension ropes to the outer end portions of the left and right rope support supports, This can be done by turning the boom.

  In this way, when the boom is turned when the tip of the tension rope is aligned with the outer end of the rope support support, the tension rope suspended from the top of the mast is engaged with the locking portion provided near the tip of the tip boom. It can be performed in a stopped state.

  In addition, after connecting the left and right tension ropes to the outer ends of the left and right rope support supports, if the base end of the jib is connected to the tip of the telescopic boom, it can be used as a boom working vehicle with a jib.

[Invention of claim 2 of the present application]
In the invention of claim 2 of the present application, the height adjustment of the tip end portion of the tension rope performed in the tension rope connecting method of claim 1 is performed by undulation of the telescopic boom. That is, the tension rope connecting method of claim 2 is performed as follows using the boom working vehicle adopted in claim 1.

  First, the boom working vehicle is stopped in a state where the upper part of the mast on the boom side can be positioned immediately above the base end of the jib placed horizontally on the ground. At this time, the telescopic boom is raised by a predetermined small angle from the most lying posture (substantially horizontal posture), leaving room for the telescopic boom to fall.

  Next, the left and right tension ropes are hung vertically from the top of the mast. Also in this case, it is preferable that the tip portions of the left and right tension ropes are positioned above the upper end height of the rope support support of the jib placed horizontally on the ground. The tip of the tension rope may be lowered to a position lower than the upper end height of the rope support support as long as it does not collide with the rope support support.

  First, in a state where one tension rope (the side to be connected first) is locked to the locking portion, the tip end portion of the one tension rope is moved to the left and right by turning the telescopic boom. Position the outer end of the rope support support at approximately the same position in the vertical direction, and then adjust the height of the tension rope tip to the height of the outer end of the rope support support by raising and lowering the telescopic boom. Connect the end of the rope to the outer end of the rope support support (pin connection).

  Next, in a state where the other tension rope is locked to the locking portion, the distal end portion of the other tension rope is moved left and right by the turning operation of the telescopic boom, and the outer end portion of the rope support support on the other side The tension rope tip is adjusted to the height of the outer end of the rope support support by raising and lowering the telescopic boom, and the tension rope tip is then supported by the rope support. Connect (pin connection) to the outer end.

  As in claim 2, even when the height of the tension rope tip is adjusted by raising and lowering the telescopic boom, after one tension rope tip is connected to one rope support support outer end, When turning the telescopic boom, sufficiently loosen the tension rope on the connected side (feed the rope out of the winch), and the tension rope on the connection side will be overstrained by the pivot movement of the telescopic boom tip. Do not.

  In the tension rope connecting method according to claim 2, the alignment work for connecting the tip ends of the left and right tension ropes to the outer ends of the left and right rope support supports can be performed by the boom turning operation of the crane of its own. .

  In the tension rope connecting method according to claim 2, when the boom is turned when the tip of the tension rope is aligned with the outer end of the rope support support, the tension rope suspended from the upper part of the mast is placed near the tip of the tip boom. It can carry out in the state locked to the provided latching | locking part.

[Invention of claim 3 of the present application]
The invention of claim 3 of the present application is the tension rope connecting method of claim 1 or 2, wherein the tip of the tension rope hanging from the upper part of the mast is displaced forward and backward relative to the outer end of the rope support support on the jib side. When the tension rope is locked to the locking portion of the tip boom, the telescopic boom is extended and retracted, and the tension rope tip is positioned almost directly above the outer end of the rope support support. It is intended to make it.

  In the case of this third aspect, even when the boom working vehicle is stopped with the distal end portion of the telescopic boom slightly displaced from the base end portion of the jib placed horizontally on the ground, By using both the swivel operation and the telescopic operation of the telescopic boom, it is possible to accurately position the tip end portions of the tension ropes on each side in the vicinity immediately above the outer end portions of the left and right rope support supports.

  According to the third aspect of the present invention, the tension rope can be reliably moved back and forth by extending and retracting the telescopic boom while the tension rope is locked to the locking portion near the tip of the boom.

  In the case of claim 3 as well, if the left and right tension ropes are connected one by one and the base end of the jib is connected to the tip of the telescopic boom, it can be used as a boom working vehicle with a jib.

[Invention of claim 4 of the present application]
The invention of claim 4 of the present application is directed to the jib coupling method performed after the tip end portion of the tension rope is connected to the outer end portion of the rope support support as described above.

  The jib coupling method according to claim 4 is the tension rope connection method according to any one of claims 1 to 3, wherein the tip ends of the left and right tension ropes are respectively connected to the outer ends of the rope support supports. After connecting, use the jib base end lifting means equipped on the boom work vehicle side or the jib side to align the jib base end with the boom tip, and place the jib base end on the boom tip. To be connected.

  The jib base end lifting means used in claim 4 may be an existing lifting winch equipped on a boom working vehicle, or as disclosed in, for example, Japanese Patent Laid-Open No. 2000-153992. A telescopic cylinder provided on the side of the jib may be used. A specific jib base end lifting method performed by using these jib base end lifting means will be described in detail in the section of the embodiment described later.

  In the jib coupling method according to claim 4, after connecting the distal ends of the left and right tension ropes to the outer ends of the left and right rope support supports, the jib base end provided on the boom work vehicle side or the jib side is provided. Since the base end of the jib is aligned with the tip of the tip boom using the part lifting means, in a boom working vehicle with a jib equipped with this type of boom lateral deflection control device, All operations (tension rope connection operation and jib connection operation) up to the connection to the boom tip can be performed by themselves without using another crane.

[Effect of the invention of claim 1 of the present application]
In the tension rope connecting method according to the first aspect of the present invention, as a preparation for connecting the base end portion of the jib horizontally placed on the ground to the boom tip portion, the tip ends of the left and right tension ropes are connected to the left and right ropes. The position of the rope tip when connecting to each outer end of the support support is sequentially adjusted one by one by turning the telescopic boom and adjusting the extension length of the tension rope.

  Therefore, in the tension rope connecting method according to claim 1 of the present application, it is possible to align each tip of the left and right tension ropes with each outer end of the left and right rope support supports without using a separate crane ( This can be done by turning the telescopic boom and adjusting the length of the tension rope, which eliminates the need to procure a separate crane.

  In addition, the tension rope is in a vertical posture with the tip end portion of the tension rope being positioned in the vicinity immediately above the outer end portion of the rope support support (the action of moving in the horizontal direction does not work). For example, there is an effect that the pin coupling operation) can be performed easily and safely.

  In addition, when the boom is turned when the tip of the tension rope is positioned near the outer end of the rope support support, the tension rope suspended from the top of the mast is engaged with the locking part provided near the tip of the tip boom. Since it is performed in a stopped state, there is an effect that the tension rope can be moved left and right in a stable posture.

[Effect of the invention of claim 2 of the present application]
In the tension rope connecting method according to the second aspect of the present invention, as a preparation for connecting the base end portion of the jib horizontally placed on the ground to the boom tip portion, the tip ends of the left and right tension ropes are connected to the left and right ropes. When connecting to the outer end portions of the support support, the position of the rope tip portion is sequentially adjusted one by one by turning and raising / lowering the telescopic boom.

  Therefore, even in the tension rope connecting method according to claim 2 of the present application, it is possible to align the front ends of the left and right tension ropes with the outer end portions of the left and right rope support supports without using a separate crane ( Since it can be performed by its own telescopic boom swiveling and undulating operation), there is an effect that the procurement cost of a separate crane becomes unnecessary.

  Further, in the case of the second aspect, the tension rope is in a vertical posture (the action of moving in the horizontal direction does not work) in a state where the tip end portion of the tension rope is aligned in the vicinity immediately above the outer end portion of the rope support support. Therefore, there is also an effect that the subsequent connection work (for example, pin connection work) can be performed easily and safely.

  Further, in the tension rope connecting method according to the second aspect, the tension rope suspended from the upper part of the mast is used when the boom is turned when the tip end of the tension rope is positioned in the vicinity of the upper end of the rope support support. Since this is performed in a state of being locked to a locking portion provided in the vicinity of the tip, there is an effect that the tension rope can be moved left and right in a stable posture.

[Effect of the invention of claim 3 of the present application]
The invention of claim 3 of the present application is the tension rope connecting method of claim 1 or 2, wherein the tip of the tension rope hanging from the upper part of the mast is displaced forward and backward relative to the outer end of the rope support support on the jib side. When the tension rope is locked to the locking part provided near the tip of the tip boom, the telescopic boom is extended and retracted so that the tip end of the tension rope is approximately straight from the outer end of the rope support support. Even if the boom work vehicle is stopped with the distal end of the telescopic boom slightly displaced from the base end of the jib placed horizontally on the ground, the boom work is not performed. By using both the swivel operation and telescopic operation of the telescopic boom of the car, the tip of the tension rope on each side is placed in the immediate vicinity immediately above the outer end of each of the left and right rope support supports. It can be located on probability.

  Therefore, in the tension rope connecting method according to the third aspect, in addition to the effect of the first or second aspect, the boom working vehicle is stopped at an about position with respect to the base end portion of the jib placed horizontally on the ground. Even in this case, the tip ends of the left and right tension ropes can be aligned to the exact corresponding positions (positions immediately above) with respect to the outer ends of the left and right rope support supports, respectively. There is an effect that the insertion work) can be easily performed.

  In the tension rope connecting method according to the third aspect, the tension rope can be securely and stably held by extending and retracting the telescopic boom while the tension rope is locked to the locking portion provided near the tip of the boom. There is also an effect that it can be moved back and forth.

[Effect of the invention of claim 4 of the present application]
The jib connecting method of the invention of claim 4 is the tension rope connecting method according to any one of claims 1 to 3, and the tip ends of the left and right tension ropes are respectively connected to the outer end portions of the left and right rope support supports. After each connection, the jib base end is aligned with the tip boom tip using the jib base end lifting means provided on the boom work vehicle side or the jib side.

  Therefore, in the jib connection method according to claim 4, in the boom working vehicle with a jib provided with this kind of boom lateral deflection suppressing device, all the steps until the base end portion of the jib horizontally placed on the ground is connected to the boom front end portion. This work (tension rope connection work and jib connection work) can be carried out by itself without using another crane (the procurement cost of another crane becomes unnecessary).

It is a side view of the jib separation state in the boom working vehicle with a jib provided with the lateral deflection control device for performing the tension rope connecting method of the embodiment of the present application. It is an enlarged view of the II-II arrow part of FIG. It is an enlarged view of the III-III arrow part of FIG. It is a work process progress figure from Drawing 3 concerning the 1st example of the tension rope connection method of this application. It is a side view (VV arrow line view) of FIG. It is a work process progress figure from Drawing 4 concerning the 1st example of the tension rope connection method of this application. It is a work process progress figure from Drawing 6 concerning the 1st example of the tension rope connection method of this application. It is explanatory drawing of 2nd Example of the tension rope connection method of this application. It is a work process progress figure (partially enlarged view) concerning 2nd Example of the tension rope connection method of this application. It is a work process progress figure from Drawing 9 concerning the 2nd example of the tension rope connection method of this application. It is explanatory drawing of 1st Example of the jib connection method of this application. It is an operation process progress figure from Drawing 11 concerning the 1st example of the jib connection method of this application. It is explanatory drawing of 2nd Example of the jib connection method of this application. It is explanatory drawing of the boom working vehicle with a jib provided with the boom lateral deflection suppression apparatus employ | adopted as a prior art of this application. It is an enlarged view of the XV-XV arrow part of FIG. It is an enlarged view of the boom front-end | tip part of FIG. 15, and jib base end part vicinity. It is explanatory drawing of the conventional tension rope connection method and jib connection method performed using the boom working vehicle with a jib provided with the boom lateral deflection suppression apparatus. It is an enlarged view of the XVIII-XVIII arrow part of FIG.

[Example]
Hereinafter, a tension rope connection method and a jib connection method according to the present embodiment will be described with reference to FIGS.

  FIGS. 1 to 3 show a boom working vehicle with a jib equipped with a boom lateral deflection suppressing device for performing the tension rope connecting method and the jib connecting method of the embodiment of the present invention. A mobile crane with a large jib is adopted as a boom work vehicle, and in the following description, this boom work vehicle will be described using a mobile crane.

  The boom working vehicle with jib (mobile crane) shown in FIG. 1 has substantially the same configuration as that shown in FIGS. 14 to 16 described in the background art section, and the jib 4 is added to the boom tip 34. Thus, the crane can be operated, and the “lateral deflection” of the telescopic boom 3 can be suppressed by the boom lateral deflection suppressing device in the crane operation state. The configuration of the boom working vehicle with jib shown in FIG. 1 employed in the embodiment of the present application will be described with reference to FIGS.

  As shown in FIGS. 14 to 16, the boom working vehicle with jib shown in FIG. 1 is provided with a swivel base 2 on a vehicle 1, and an extendable boom 3 is attached to the swivel base 2 so as to be freely raised and lowered. The telescopic jib 4 can be added to the distal end of 3 and used.

  The telescopic boom 3 is a base boom 31 and a plurality (three in the illustrated example) of intermediate booms 32, 32, 32 and a distal boom 33 that are successively stretched in a telescopic manner. Some are over 60m long. The telescopic boom 3 is raised and lowered by a raising and lowering cylinder 30.

  In this embodiment, the jib 4 to be added to the tip of the boom is an expansion / contraction jib in which a base end jib 41, a plurality of (two in the illustrated example) intermediate jibs 42 and 42, and a front end jib 43 are successively extended. It has been adopted. As described above, in the case where the expansion / contraction jib 4 is used as the jib, each single jib is connected and transported to the jib connection site, so there is no need to assemble the jib at the jib connection site. In other embodiments, a jib that does not expand and contract can be used.

  A jib support 40 is attached to the base end portion of the telescopic jib 4, and the telescopic jib 4 is detachably connected to the distal end portion 34 (boom head) of the telescopic boom 3 via the jib support 40. In the case where the telescopic jib 4 is connected to the boom tip 34 via the jib support 40 in this way, the jib support 40 corresponds to the jib base end in the claims.

  3 and 16, the telescopic jib 4 pivotally supports the base end portion of the base end jib 41 on the front end portion of the jib support 40 with a horizontal and horizontal axis (hereinafter referred to as a tilt axis) 45. As shown in FIG. Thus, the telescopic jib 4 is connected so as to be able to swing (tilt) in the boom hoisting surface. The telescopic jib 4 can be tilted within a predetermined angle range by a tilt cylinder 46 interposed between the jib support 40 and the base end jib 41.

  When crane work is carried out with this jib-equipped boom working vehicle (mobile crane), the suspended rope 12 is unwound from the lifting winch 11 provided on the swivel base 2 as shown in FIG. The load hook 13 is suspended. When the crane work is performed only with the telescopic boom 3, the jib support 40 is removed from the boom tip 34 together with the telescopic jib 4, and the main hook is suspended from the boom tip 34.

  By the way, in this type of large-sized jib-equipped boom working vehicle, for example, as shown in FIG. Lateral deflection may occur in the boom 3.

  Accordingly, the boom working vehicle with jib used in this embodiment is equipped with a lateral deflection suppressing device for suppressing lateral deflection of the telescopic boom 3.

  As shown in FIGS. 1 to 3 and FIGS. 14 to 16, the boom lateral deflection suppressing device used in this embodiment has left and right outwards at the base end (jib support 40) of the telescopic jib 4. Left and right rope support supports 5 and 5 attached in a protruding state, and left and right masts provided at the outer end portions 5a and 5a of the respective rope support supports 5 and 5 and the distal end portion of the proximal boom 31 of the telescopic boom 3 9 and 9 are provided with left and right tension ropes 6 and 6 and left and right rope length adjusting devices 7 and 7 for adjusting the feeding lengths of the tension ropes 6 and 6, respectively. The left and right connecting members 8 are connected to the outer end portions 5a, 5a of the supports 5, 5 and the left and right side portions of the base end jib 41 spaced a predetermined length from the tilt center P (tilt shaft 45) of the telescopic jib 4 to the jib tip side. 8 is connected.

  Left and right masts 9 and 9 having a considerable length (about 9 to 10 m) are attached to the distal end portion of the proximal end boom 31 by a mast hoisting cylinder 10 so as to be raised and lowered. The masts 9 and 9 are generally used in a state where the masts 9 and 9 are raised up to an angle of approximately 90 ° with respect to the proximal boom 31. The raising angle of each of the masts 9 and 9 with respect to the base end boom 31 can be used in a forward inclined posture in which the masts 9 and 9 are inclined to the front side from about 90 °.

  Upper sheaves 9a and 9a for winding tension ropes are provided at upper ends of the left and right masts 9 and 9, respectively.

  The distance between the upper ends of the masts 9, 9 (the sheaves 9a, 9a of the left and right masts 9, 9) is about 1.7 to 1.8 m. The distance between the upper ends of the masts 9 and 9 can be appropriately changed in design. The tension ropes 6 and 6 are hung down through the sheaves 9a and 9a at the upper ends of the masts 9 and 9, respectively.

  As shown in FIGS. 2 and 5, the left and right rope support supports 5 and 5 are formed by connecting the upper arm 51 and the lower arm 52 in an acute angle state on the distal end side. Each of the rope support supports 5 and 5 has a length in which the outer end portions 5a and 5a protrude outward by about 3 m from the center of the jib.

  Therefore, when the distance between the upper ends of the masts 9 and 9 is about 1.7 to 1.8 m, the outer end portions 5a and 5a of the left and right rope support supports 5 and 5 are connected to the masts 9 and 9, respectively. It protrudes by a little over 2 m from right below the upper end (each sheave 9a, 9a).

  The rope support supports 5 and 5 are pivotally supported by pins 54 (FIGS. 3 and 16) on the left and right side surfaces of the upper and lower arms 51 and 52 near the base end of the jib support 40, respectively. It is installed. The left and right rope support supports 5 and 5 can swing back and forth respectively with the left and right rope support supports 5 and 5 using pins 54 (two upper and lower) as fulcrums.

  As shown in FIG. 16, the left and right connecting members 8 and 8 connect the rope support support outer end portions 5a and 5a and the left and right side surfaces of the base end jib 41 to support each rope as will be described later. The positions of the support outer end portions 5a and 5a are specified, and in this embodiment, a plurality of bar members connected so as to be able to bend and stretch is employed.

  The connecting members 8, 8 are connected to the rope support support outer ends 5 a, 5 a while the connecting members base ends 8 a, 8 a are connected to the telescopic jib 4. The base end jib 41 is connected to the left and right side surfaces of the base end jib 41 at a predetermined distance (about 3.5 m in the illustrated example) from the center P (tilt shaft 45) to the jib tip side. Further, as shown in FIG. 16, the base end portions 8a and 8a of the connecting members 8 and 8 are pivotally attached to the rope support support outer end portions 5a and 5a by a vertical axis 81 and a horizontal axis 82, respectively. The connecting member 8 is connected to the outer end 5a of the rope support support so that it can swing in the dibutylt direction.

  And the front-end | tip parts 8b and 8b of each connection material 8 and 8 are the jib side surface with the rocking | swiveling center (horizontal axis 82) of each connection material base end part 8a and 8a with respect to each right and left side part of the base end jib 41. In view, it is connected to a position where it overlaps with the dibutylt center P (on the left-right extension line of the tilt shaft 45). That is, the base ends of the left and right rope support supports 5 and 5 are pivotally supported by the upper and lower pins 54, and the rope support supports 5 and 5 can swing back and forth. By connecting the left and right side surfaces of the support outer ends 5a and 5a and the base end jib 41 with connecting members 8 and 8 having a fixed length, the rope support supports 5 and 5 can be positioned in a predetermined posture. At this time, the swinging center (horizontal axis 82) of the base end portions 8a and 8a of the connecting members is superposed on the dibutylt center P (on the left and right extension line of the tilt shaft 45) in the side view of the jib.

  Brackets 56 and 56 for connecting the tip end portion 6a of the tension rope 6 are fixed to the outer end portions 5a and 5a of the rope support supports 5 and 5 by means such as welding.

  As the rope length adjusting devices 7 and 7 of the tension ropes 6 and 6, winches provided in the respective masts 9 and 9 are adopted. In the following description, this rope length adjusting device is referred to as a winch 7.

  As shown in FIGS. 1 and 2, the left and right tension ropes 6 and 6 are respectively fed out from the left and right winches 7 and 7 attached to the left and right masts 9 and 9 erected on the distal end portion of the base end boom 31. Is done. The tension ropes 6 and 6 are hung forward through the upper ends of the left and right masts 9 and 9 (there is a sheave 9a), and the rope tip ends 6a and 6a are suspended from the left and right rope support supports 5 respectively. , 5 and connected to the outer end 5a (bracket 56).

  In the tension rope usage example shown in FIGS. 1 and 2, the tension ropes 6, 6 include a base rope 61 wound around the aerial sheave 62 from the winch 7 through the upper sheave 9 a of the mast 9, and the aerial sheave. A leading rope 63 connected to 62. In this case, the tip 6a of the tension rope 6 refers to the tip of the tip rope 63, and the tip of the tip rope 63 (reference numeral 6a) is a bracket provided on the rope support support outer tip 5a. A connector 60 connected to 56 is attached. In addition, this connection tool 60 is formed in a considerably large size in order to require high strength (thus, it has a considerable weight).

  In addition, the tension ropes 6 and 6 are connected to tension cylinders 64 and 64 attached to the masts 9 and 9 at the tip ends of the base ropes 61 and 61, respectively. The distance between the upper sheave 9a of the mast 9 and the air sheave 62 is made variable.

  Each tension cylinder 64, 64 is provided with a rope tension detector 65 for detecting the tension of the tension rope 6. The function of the rope tension detector 65 will be described later.

  The boom working vehicle used in this embodiment is provided with a locking portion 36 for locking the tip side rope 63 portion of the tension rope 6 suspended from the upper portion of the mast at the boom tip portion (boom head) 34. It has been. In this embodiment, as the locking portion 36, one having a suspension member attached to each of the left and right side surfaces of the boom head 34 is employed. Each of the sasmata-like members (locking portions) 36 and 36 locks the front rope 63 portion of the tension rope 6 as shown in FIG. 3 so that the front rope 63 is displaced from side to side. It has a function of preventing the rearward movement and preventing the rearward movement.

  The suspension-like member 36 serving as the locking portion can be detachably attached to the left and right side surfaces (mounting bases) of the boom head 34, and in this case, one suspension-like member 36 is attached to the left and right sides of the boom head 34. In addition to being able to replace each side, the sasmata-like member 36 can be removed from the boom head 34 when not in use. In another embodiment, an existing recess on the front surface of the boom head 34 (for example, a recess between the sheaves 35 and 35 in the boom head 34) is used as the locking portion 36 in place of the sasmata member. May be.

  In addition, the function of this latching | locking part 36 is demonstrated in the description part of the tension rope connection method mentioned later.

  The boom lateral deflection suppressing device used in the embodiment shown in FIGS. 1 to 3 (in combination with FIGS. 14 to 16) functions as follows.

  First, the distal ends of the left and right tension ropes 6 and 6 are attached to the outer end portions 5a and 5a (brackets 56 and 56) of the left and right rope support supports 5 and 5 attached to the base end portion (jib support 40) of the telescopic jib 4, respectively. 14 to 16 by connecting the portions 6a and 6a (connectors 60 and 60) and tensioning the tension ropes 6 and 6 with the right and left winches 7 and 7 (which become rope length adjusting devices), respectively. The lateral bending of the telescopic boom 3 can be suppressed in the crane working state shown in FIG. That is, since the boom tip 34 is supported in tension by the rope support supports 5 and 5 and the tension ropes 6 and 6 from the left and right sides, the boom tip 34 is less likely to swing left and right. Further, in this embodiment, since the proximal end side of each tension rope 6, 6 is located at the distal end (upper end) of the mast 9, the boom distal end portion 34 can be supported from above, and the telescopic boom 3 is moved downward. Can also be suppressed.

  The left and right connecting members 8 and 8 connect the outer end portions 5a and 5a of the rope support supports 5 and 5 and the left and right side surfaces of the base end jib 41 at a position spaced from the dibutylt center P to the tip end side of the jib by a predetermined length. The telescopic jib 4 (especially the proximal end jib 41) is supported in tension from the left and right sides, and the lateral deflection of the telescopic jib (particularly the proximal end jib 41) can also be suppressed.

  In this embodiment (in combination with FIGS. 14 to 16), the base end portions 8a and 8a of the connecting members 8 and 8 are located at the center of dibutylt with respect to the outer end portions 5a and 5a of the rope support support when viewed from the side of the jib. At a position where it overlaps with P (on the left and right extension line of the tilt shaft 45), the connecting members 8 and 8 are pivotally supported so as to be able to swing in the dibutylt direction with respect to the outer ends 5a and 5a of the rope support supports. Therefore, even if the telescopic jib 4 is tilted in the crane working posture, the swing fulcrum position of the base end portion 8a of the left and right connecting members 8 remains unchanged. Therefore, the tilting operation of the telescopic jib 4 is performed without any trouble.

  In the boom working vehicle with jib according to the first embodiment, when the telescopic boom 3 is expanded and contracted in a state where the boom lateral deflection suppressing device is equipped, the tension ropes 6 are respectively adjusted by the rope length adjusting devices (winches) 7 and 7. , 6 while adjusting the feeding length.

  By the way, in the boom working vehicle with a jib of this embodiment, when the telescopic jib 4 is connected to the boom tip (boom head) 34, there is a background as described in the above section of the background art. That is, in order to connect the telescopic jib 4 to the boom tip 34, as shown in FIGS. 1 to 3, the left and right tension ropes 6 and 6 are connected with the telescopic jib 4 horizontally placed on the ground. It is necessary to connect to the outer ends 5a and 5a of the rope support supports 5 and 5 on the jib side. In the conventional tension rope connection method, the tension rope tip 6a (connector 60) is aligned with the rope support support outer end 5a (bracket 56) (the tension rope 6 needs to be largely inclined). Since it requires a lot of labor to perform by manpower and it is dangerous work, it was performed using another crane (hook F) as shown in FIGS. 17 and 18 (in this case, the jib connection site) A separate crane must be transported to the crane, which incurs crane procurement costs).

  Therefore, the tension rope connecting method of the embodiment of the present invention uses the own boom working vehicle without using another crane, and connects the tip end portion 6a (connector 60) of the tension rope 6 to the rope support support outer end portion 5a. The position is held in the vicinity of (bracket 56), and the following operations are sequentially performed. As shown in FIG. 1, the telescopic jib 4 to be connected to the boom tip is horizontally placed on the ground in a fully contracted state, but the distal end of the base end jib 41 of the telescopic jib 4 is at the lower end. The support leg 47 with the roller 48 is provided, and the roller 48 of the support leg 47 rolls on the ground when the jib base end side is lifted as will be described later.

  As a tension rope connecting method of the present embodiment, there are a first embodiment shown in FIGS. 1 to 7 and a second embodiment shown in FIGS.

  First, in the tension rope connecting method of the first embodiment, as shown in FIGS. 1 to 3, the front surface of the boom head 34 lies horizontally on the ground with the telescopic boom 3 fully reduced and laid down to a substantially horizontal posture. The boom working vehicle is stopped in a state where it is positioned in the vicinity (a little in front) of the base end portion (jib support 40) of the telescopic jib 4 that has been placed. In this case, the boom work vehicle is stopped so that the turning center of the telescopic boom 3 (the turning center of the swivel base 2) is located on the substantially extended line of the center line of the telescopic jib 4 placed horizontally on the ground in plan view, Moreover, it is preferable that the telescopic boom 3 is oriented substantially on the extension line of the jib center line.

  Next, the left and right tension ropes 6 and 6 are suspended from the upper portions of the masts 9 and 9 in the vertical direction. At this time, the front end portions 6a and 6a (connectors 60 and 60) of the left and right tension ropes 6 and 6 are positioned higher than the upper end height of the rope support 5 and 5 of the telescopic jib 4 placed horizontally on the ground. Although it is preferable that the height of the tip 6a (connector 60) of the tension rope 6 on the side to be connected first is a position where it does not collide with the rope support 5, the upper end height of the rope support 5 is supported. It may be lowered to a lower position. In this case, it is preferable that the distal end portion 6a of the tension rope 6 to be connected later is positioned above the upper end height of the rope support support 5.

  2 and 3, the distal ends (connectors 60, 60) of the left and right tension ropes 6, 6 are front and rear from the outer ends 5a, 5a of the left and right rope support supports 5, 5 in a plan view. Although they are separated from each other by a considerable length, the left and right tension ropes 6 and 6 (front ropes 63 and 63) are relatively close to the locking portions 36 and 36 on the left and right sides of the boom head 34. It hangs down.

  Each of the tension ropes 6 and 6 is connected one by one. In the first embodiment, as shown in FIGS. 2 and 3, the right tension rope 6 as viewed from the front side of the boom head 34 is connected first. I have to. In the following description, the right side or the left side is a direction viewed from the front side of the boom head 34, the front is the extending direction of the telescopic jib 4, and the rear is the reducing direction of the telescopic jib 4.

  Next, one tension rope 6 (front side rope 63) hanging down on the right side is inclined forward by human power, and the front side rope 63 is engaged with the right side locking portion 36 from the front side (FIG. 2). And the state of reference numeral 63 'in FIG. At this time, the tilting angle of the tension rope (the front rope 63) is not so large, and only the work of merely depositing the front rope 63 to the engaging portion 36 is performed. Yes. As described above, when the leading rope 63 is locked to the locking portion 36, the connecting tool 60 at the tip of the leading rope is positioned directly below the locking portion 36. At this time, the front side rope 63 of the other (left side) tension rope 6 in FIG. 3 can also be engaged with the left side locking portion 36, but in the illustrated embodiment, the left side tension rope 6 ( The locking operation of the leading rope 63) to the left locking portion 36 is performed later.

  Next, as shown in FIG. 4, from the state in which the leading rope 63 'is locked to the locking portion 36 as shown in FIG. 3, the right locking portion 36 that locks the leading rope 63 is on the right side as shown in FIG. The telescopic boom 3 is horizontally turned by a predetermined angle in a direction directed to the bracket 56 at the outer end portion 5a of the rope support support 5 (the turntable 2 in FIG. 1 is turned). In this state (the fully-expanded telescopic boom shown in solid lines in FIGS. 4 and 5), the connection tool 60 directly below the locking portion 36 is connected to the outer end 5a of the rope support support 5 (the connection tool 60 should be connected). It is spaced considerably rearward from the bracket 56).

  Next, from the state shown by the solid line in FIGS. 4 and 5, the telescopic boom 3 is extended to advance the boom head 34 to the position shown by the chain line (position 34 '), and the locking portion 36' (connector 60 ' ) Is positioned directly above the bracket 56 of the rope support support outer end 5a. At this time (during the extension operation of the telescopic boom 3), the tip rope 63 'of the tension rope 6' moves while being locked to the locking portion 36 '. It can be tilted forward (without detaching from the stop 36 '). If the connection tool 60 ′ moves up excessively due to the inclination of the tension rope 6 during the extension operation of the telescopic boom 3, the tension rope 6 (base side rope) is moved from the winch 7 in accordance with the extension operation of the telescopic boom 3. 61) may be slightly extended.

  Next, from the state shown by the chain line in FIG. 4 and FIG. 5, the tension rope 6 (base rope 61) is extended by a predetermined length by operating the winch 7 (FIG. 2), and the connection device 60 'at the tip end of the tension rope is connected. Match the height of the bracket 56 at the outer end of the rope support support (the height at which the pin can be connected). In this state, the connection tool 60 ′ is stationary at a position suspended vertically from the locking portion 36 ′, and no human power is required to hold the connection tool 60 ′ in position. After that, the connection tool 60 'is finely adjusted in the front / rear direction or the left / right direction so that the pin hole of the connection tool 60' is matched with the pin hole of the bracket 56, and the pins are inserted into the both pin holes to attach the connection tool 60 'to the bracket. 56.

  Next, the telescopic boom 3 is swiveled to connect the other (left) tension rope 6. At this time, the right tension rope 6 connected first becomes excessive in the next telescopic boom swiveling operation. In order to avoid tension, the base rope 61 is appropriately extended from the winch 7 to be loosened. Before and after the connection work of the right tension rope 6, the left tension rope 6 (the front rope 63) is locked to the left locking portion 36.

  Next, in a state where the left tension rope 6 (the front rope 63) is locked to the left locking portion 36, the telescopic boom 3 is turned to the left by a predetermined angle as shown in FIG. The left locking portion 36 that locks the leading rope 63 is directed in a direction toward the bracket 56 at the outer end 5 a of the left rope support 5. Even during the pivoting boom swinging operation, the left front rope 63 moves while being locked by the left locking portion 36, so that the left front rope 63 can be moved in a stable posture. .

  Then, from the state shown by the solid line in FIG. 6, the telescopic boom 3 is extended to advance the boom head 34 to the position shown by the chain line (position 34 ') in the same manner as the right tension rope connecting method described above. The portion 36 '(connector 60') is positioned directly above the bracket 56 of the rope support support outer end portion 5a.

  Subsequently, from the state shown by the chain line in FIG. 6, the left tension rope 6 (base rope 61) is extended by a predetermined length by operating the winch 7 (FIG. 2), and the tension rope tip connection tool 60 'is left. In accordance with the height of the bracket 56 at the outer end of the rope support support (the height at which the pin can be connected), the connection tool 60 'is finely adjusted forward and backward or left and right so that the pin hole of the connection tool 60' The connector 60 ′ is coupled to the bracket 56 by matching the holes and inserting pins into the pin holes.

  Thereafter, the tension rope 6 on the left side is loosened from the state shown by the chain line in FIG. 6 (the base rope 61 is extended from the winch 7). When the head 34 is turned to the right toward the jib support 40, the connection work of the left and right tension ropes 6 and 6 is completed as shown in FIG.

  Thus, if the tension rope connection method of the first embodiment of the present application is performed, the following functions can be obtained.

  First, in order to align the front ends 6a, 6a (connectors 60) of the left and right tension ropes 6, 6 with the outer ends 5a, 5a (brackets 56) of the left and right rope support supports 5, 5, respectively. Since it can be performed by its own power (turning operation and expansion / contraction operation of its own telescopic boom 3 and operation for adjusting the feeding length of the tension rope 6) without using another crane, another crane becomes unnecessary.

  Further, even when the boom working vehicle is stopped at an about position with respect to the base end portion (jib support 40) of the telescopic jib placed horizontally on the ground, the distal end portions 6a, 6a of the left and right tension ropes 6, 6 are used. Can be aligned with each of the outer end portions 5a and 5a of the left and right rope support supports 5 and 5 at an exact corresponding position (a position immediately above).

  Further, when the locking portion 36 for locking the tension rope 6 (the front rope 63) is provided on the boom head 34, the tension rope 6 (the front rope 63) is locked to the locking portion 36. When the telescopic boom 3 is turned and expanded and contracted, the tension rope 6 can be moved right and left and back and forth in a reliable and stable posture.

  When the boom working vehicle is stopped with respect to the base end portion (jib support 40) of the horizontally extending telescopic jib 4, when the telescopic boom 4 is turned in the fully contracted state of the telescopic jib 4, the boom is When the boom working vehicle is stopped so that the left and right engaging portions 36, 36 of the distal end portion 34 are located immediately above the outer end portion 5a (bracket 56) of the rope support support 5, the above-described tension rope connection In the method, the telescopic operation of the telescopic boom 3 is not necessary (contents corresponding to claim 1 of the present application).

  Further, when the tip 6a (connector 60) of the tension rope 6 to be connected first is connected to the rope support support outer end (bracket 56), the tension rope tip (connector 60) is supported by the rope. The tension rope tip (connector 60) is adjusted to the height of the rope support support outer end (bracket 56) from a state where the support 5 is lowered below the upper end height of the rope support support 5 at a position where the support 5 does not collide. In this case, the tension rope tip (connector 60) is moved up by winding up the winch 7.

  By the way, when moving from FIG. 4 to FIG. 6, that is, in a state where the distal end portion (connector 60) of the right tension rope 6 is connected to the outer end portion (bracket 56) of the right rope support support 5. When turning the boom 3 to the left, if you forget to loosen the right tension rope 6 connected earlier, the right tension rope 6 will be excessive when the telescopic boom 3 is turned to the left. There is a case where the rope support 5 on the right side is lifted by tension (in this case, there is a risk that the telescopic jib 4 rolls over).

  Therefore, in this embodiment, when the tension rope 6 is abnormally tensioned when the tension rope is connected, this is detected by the rope tension detector 65 (see FIGS. 1 and 2) provided in the tension cylinder 64. Thus, the turning operation of the telescopic boom 3 is immediately stopped by a signal from the rope tension detector 65. The rope tension detector 65 functions only when the tension rope is connected. After the connection between the tension ropes 6 and 6, the rope tension detector 65 is turned off.

  8 to 10 show the tension rope connecting method of the second embodiment. The tension rope connecting method of the second embodiment is the tension rope tip portion in the tension rope connecting method of the first embodiment. The height adjustment of 6a (connector 60) is performed by raising and lowering the telescopic boom 3. In the tension rope connection method of the second embodiment, the tension rope connection of the first embodiment except for the portion where the tension rope tip 6a (connector 60) is adjusted by raising and lowering the telescopic boom 3. The method is almost the same as the method, and the same part as the tension rope connecting method of the first embodiment will be briefly described.

  Also in the tension rope connecting method of the second embodiment (FIGS. 8 to 10), the base end portion of the telescopic jib 4 in which the front surface of the boom head 34 is placed horizontally on the ground with the telescopic boom 3 fully contracted (jib The boom working vehicle is stopped in a state where it is positioned in the vicinity immediately above the support 40) (slightly in front). At this time, as shown in FIG. For example, 5 ° to 10 °) is raised, leaving room for the telescopic boom 3 to fall down.

  In this case as well, as shown in FIG. 3 (first embodiment), the center line of the telescopic jib 4 in which the pivot center of the telescopic boom 3 (the pivot center of the swivel base 2) is placed on the ground in a plan view. The boom working vehicle is stopped so as to be substantially on the extension line, and the left and right tension ropes 6 and 6 are suspended from the upper portions of the masts 9 and 9 in the vertical direction.

  Next, from the state of FIG. 8, the tension rope 6 on the side to be connected first (right side) is tilted forward by human power, and the leading rope 63 as shown by the chain line (reference numerals 6 ′ and 63 ′) in FIG. 8. 'Is engaged with one (right side) locking portion 36 from the front side (the state shown by the solid line in FIG. 9). In the second embodiment, the tension rope 6 (the front rope 63) on the side (left side) to be connected later is also preferably locked to the other (right side) locking portion 36 at the same time.

  Next, from the state shown by the solid line in FIG. 9, the right locking portion 36 that locks the leading rope 63 is located on the outer end 5 a of the right rope support 5 as shown in FIG. 4 (first embodiment). The telescopic boom 3 is horizontally turned by a predetermined angle in a direction directed to the bracket 56.

  Subsequently, the telescopic boom 3 is extended to advance the boom head 34 to the position shown by the chain line in FIG. 9 (position 34 '), and the locking portion 36' (connector 60 ') is moved to the outer end of the rope support support. It is located just above the bracket 56 of the part 5a. 9 is the same as the solid line shown in FIG. 10. In this state, the rope support support outer end (bracket 56) to which the tension rope tip (connector 60) should be connected is directly connected. Located in the upper vicinity.

  Next, from the state shown by the solid line in FIG. 10, the telescopic boom 3 is laid down (in the state of reference numeral 3 ′ shown in FIG. 10), and the connection tool 60 at the tip end of the tension rope is shown by the broken line (reference numeral 60 ′). To the height of the bracket 56 at the outer end of the rope support support.

  After that, the connection tool 60 'is finely adjusted in the front / rear direction or the left / right direction so that the pin hole of the connection tool 60' is matched with the pin hole of the bracket 56, and the pins are inserted into the both pin holes to attach the connection tool 60 'to the bracket. 56.

  Next, the telescopic boom 3 is swiveled to connect the other (left) tension rope 6. At this time, the right tension rope 6 connected first becomes excessive in the next telescopic boom swiveling operation. In order to avoid tension, the base rope 61 is appropriately extended from the winch 7 to be loosened.

  Then, after the connection of one (right) tension rope 6 is completed, the telescopic boom 3 ′ shown in FIG. 10 is lifted by a predetermined angle indicated by a solid line (reference numeral 3), and then the telescopic boom 3 is moved leftward. As shown in FIG. 6 (first embodiment), the left locking portion 36 ′ (connecting tool 60 ′) is placed directly above the outer end portion (bracket 56) of the left rope support 6. Position. At this time, when the connecting device 60 ′ is displaced forward and backward from the bracket 56, the position of the telescopic boom 3 may be extended and retracted (and used together with the turning operation if necessary) to adjust the position. .

  After that, as with the previous method of connecting the tension rope 6, the telescopic boom 3 is laid down so that the tip of the left tension rope (connector 60) matches the height of the bracket 56 at the outer end of the left rope support support. (The pin holes of the connection tool 60 are matched with the pin holes of the bracket 56), pins are inserted into both pin holes, and the connection tool 60 is coupled to the bracket 56 (the state shown in FIG. 6 is obtained).

  Thereafter, when the tension rope 6 on the left side is loosened and then the telescopic boom 3 is fully contracted, when the telescopic boom 3 is turned rightward to a position where the boom head 34 faces the jib support 40, the left and right tension ropes 6 and 6 are completed (the same state as in the first embodiment of FIG. 7).

  As described above, in the tension rope connecting method according to the second embodiment shown in FIGS. 8 to 10 as well, as with the tension rope connecting method according to the first embodiment, the distal ends 6a and 6a of the left and right tension ropes 6 and 6 are used. Since the (connector 60) can be aligned with the outer ends 5a and 5a (brackets 56) of the left and right rope support supports 5 and 5 by itself without using another crane, another crane can be used. Has the function of eliminating the need for

  In the description of the tension rope connecting method according to the second embodiment, the tension rope 6 can be expanded and contracted in order to adjust the position (height adjustment) of the tip of the tension rope 6 (connector 60) to the tip of the rope support support (bracket 56). Although only the raising / lowering operation of the boom 3 is performed, in another embodiment, the alignment (height adjustment) of the tip end portion of the tension rope is used together with the raising / lowering boom raising / lowering operation in the first embodiment. The length adjusting operation of the tension rope 6 described (the rope winding / unwinding operation of the winch 7) may be performed. In that case, by using both operations in combination, a fine alignment operation can be performed, and the operation for matching the pin holes of both connection members (connector 60 and bracket 56) becomes easier.

  By the way, after the tension rope connecting method of the first embodiment or the second embodiment is performed and the tension ropes 6 and 6 are connected (the state shown in FIG. 7), the base end of the telescopic jib 4 (jib The support 40) is connected to the boom tip (boom head) 34. In the present application, the jib connection method of the first embodiment shown in FIGS. 11 and 12 and the jib connection method of the second embodiment shown in FIG. The base end portion (jib support 40) of the telescopic jib 4 is connected to the distal end portion (boom head 34) of the telescopic boom 3.

  In the jib connection method of each embodiment, the jib base end lifting means is used to lift the base end of the expansion / contraction jib 4 in the horizontal position, but as the jib base end lifting means, The existing unloading winch 11 equipped in the boom working vehicle as in the first embodiment shown in FIG. 11 is used, or the telescopic jib 4 (base end jib 41) as in the second embodiment shown in FIG. A telescopic cylinder 15 installed separately on the side can be used.

  The jib base end (jib support 40) and the boom tip (boom head 34) are connected to the upper bracket 40a with a pin hole provided at the base end of the jib support 40 (a pair of left and right) and a pin hole. The lower bracket 40b (with a pair of left and right) is connected to the upper bracket 34a (with a pair of left and right) with a pin hole provided at the front end of the boom head 34 and the lower bracket 34b (with a pair of left and right) with a pin hole. Is done by doing.

  Further, in the jib connecting methods of the first and second embodiments, the jib base end side is lifted as shown in FIG. 11 and FIG. 13 (the entire expansion / contraction jib is inclined as indicated by reference numeral 4 '). Since the upper bracket 40a of the jib support 40 is first connected to the upper bracket 34a of the boom head 34, the lower side of the base end surface of the jib support 40 is placed with the telescopic jib 4 placed horizontally on the ground. It is placed in a posture that tilts forward. The inclined posture of the jib support 40 can be achieved by slightly reducing the tilt cylinder 46.

  In the jib coupling method of the first embodiment shown in FIG. 11, the lifting winch 11 provided on the swivel base 2 is used as the jib base end lifting means. In the jib coupling method of the first embodiment (FIG. 11), the leading end side of the rope 12 fed from the unloading winch 11 is guided to the front of the boom tip portion via the sheave 35 of the boom head 34, As shown in FIG. 11 (also shown in FIG. 7), the tip 12a of the rope 12 is latched at an appropriate position near the center of the base end surface of the jib support 40 (in the example shown, a latch receiving tool 40c is provided). Then, by winding up the winch 11 in this state, the base end side of the jib is lifted while the front end side (support leg 47 with the roller 48) of the telescopic jib 4 'is grounded as shown by the chain line in FIG. I have to.

  In the state where the base end side of the telescopic jib 4 ′ is lifted (the state shown by the chain line in FIG. 11), first, the pin holes of the left and right upper brackets 40 a of the jib support 40 are respectively pin holes of the left and right upper brackets 34 a of the boom head 34. The upper part of the jib support 40 is connected to the upper part of the boom head 34 by inserting pins into both pin holes (two places on the left and right sides). Thereafter, the tilt cylinder 46 'is slightly extended so that the pin holes of the left and right lower brackets 40b of the jib support 40 are aligned with the pin holes of the left and right lower brackets 34b of the boom head 34, so that both pin holes (two places on the left and right) When the pins are inserted and the lower part of the jib support 40 is connected to the lower part of the boom head 34, the connecting operation of the telescopic jib 4 is completed as shown in FIG. In addition, after the expansion / contraction jib 4 is connected, the distal end portion 12a of the rope 12 is removed from the latch receiving member 40c.

  In the jib coupling method of the first embodiment of FIG. 11, since the lifting winch 11 of the boom working vehicle is used as the jib base end lifting means, the boom operation with the jib provided with this kind of boom lateral deflection suppressing device is used. In a vehicle, all operations (tension rope connection operation and jib connection operation) until the telescopic jib 4 placed horizontally on the ground is connected to the boom tip 34 can be performed by itself without using another crane. . In the jib connecting method of the first embodiment, since the existing lifting winch 11 is used for the boom working vehicle to lift the jib base end, it is necessary to separately provide a dedicated jib base end lifting means. The existing one (unloading winch 11) can be used effectively.

  In the jib connecting method of the second embodiment shown in FIG. 13, the jib base end is lifted when the base end (jib support 40) of the telescopic jib 4 placed horizontally on the ground is connected to the boom tip (boom head 34). As a means, the telescopic cylinder 15 installed on the lower surface (or the upper surface) of the base end jib 41 is used, while a plurality of (four) sheaves 16, 17, 18, 19 provided on the jib side are connected to the rope 20 The one multiplied by is adopted.

  A sheave 16 is a movable sheave provided at the tip of the rod of the telescopic cylinder 15, and the other three sheaves 17, 18, and 19 are fixed sheaves, each having a pair on the left and right. Then, with the intermediate portion of one rope 20 wound around the movable sheave 16 provided at the tip of the rod, the left and right sides of the rope 20 were hung around a pair of left and right sheaves 17, 18, and 19, respectively. Thereafter, the left and right ends of the rope 20 are set on the upper part of the boom head 34, respectively. Note that the rope 20 is wound in a state where the telescopic cylinder 15 is contracted to the minimum.

  The jib base end lifting means (using the telescopic cylinder 15) employed in the jib coupling method of the second embodiment is used in the jib detaching apparatus disclosed in Japanese Patent Laid-Open No. 2000-153992. Thus, detailed description of other configurations is omitted.

  In the jib connecting method of the second embodiment (FIG. 13), the outer end portions of the left and right rope support supports 5 and 5 on the side of the telescopic jib 4 laid horizontally on the ground, as in the first embodiment of FIG. However, in the case of this second embodiment, the rope 20 is moved with the telescopic cylinder 15 as the jib base end lifting means being contracted to the minimum. It hangs around each sheave (16-19), and the left and right ends of the rope 20 are locked to the upper part of the boom head 34 (shown by the solid line in FIG. 13).

  Then, when the telescopic cylinder 15 is extended from the state shown by the solid line in FIG. 13 (reference numeral 15 '), the movable sheave 16 wound around the intermediate portion of the rope 20 moves forward, and the intermediate portion of the rope 20 moves forward. By being pushed, the base side of the jib is lifted while the front side of the telescopic jib 4 (the roller 48 of the support leg 47 provided at the distal end of the base end jib 41) is grounded (the telescopic jib is indicated by a reference numeral 4 'shown by a chain line). State).

  Next, in the state where the base end side of the telescopic jib 4 ′ is lifted (as shown by the chain line in FIG. 13), first, each pin of the left and right upper bracket 40 a of the jib support 40 is the same as in the first embodiment (FIG. 11). The holes are matched with the respective pin holes of the left and right upper brackets 34 a of the boom head 34, and pins are inserted into both pin holes (two places on the left and right) to connect the upper part of the jib support 40 to the upper part of the boom head 34. Thereafter, the tilt cylinder 46 'is slightly extended so that the pin holes of the left and right lower brackets 40b of the jib support 40 are aligned with the pin holes of the left and right lower brackets 34b of the boom head 34, so that both pin holes (two places on the left and right) If the pin is inserted and the lower part of the jib support 40 is connected to the lower part of the boom head 34, the connecting operation of the telescopic jib 4 is completed. Note that the rope 20 is removed after the telescopic jib 4 is connected.

  In the jib coupling method of the second embodiment (FIG. 13), a dedicated telescopic cylinder 15, each sheaves 16 to 19, a rope 20 and the like are required as a jib base end lifting means. Since it is installed on the jib side in advance, in this case as well, in a boom working vehicle with a jib equipped with this type of boom lateral deflection suppressing device, the telescopic jib 4 placed horizontally on the ground is connected to the boom tip 34. All work (tension rope connection work and jib connection work) can be performed by itself without using a separate crane.

  1 is a vehicle, 2 is a swivel base, 3 is a telescopic boom, 4 is a jib (extensible telescopic jib), 5 is a rope support support, 5a is a rope support support outer end, 6 is a tension rope, 6a is a tension rope tip, 7 Is a rope length adjusting device (winch), 8 is a connecting material, 9 is a mast, 11 is a lifting winch, 12 is a rope, 15 is a telescopic cylinder as a jib proximal end lifting means, 31 is a proximal boom, 34 is A boom tip portion (boom head), 36 is a locking portion, 40 is a jib base end portion (jib support), 41 is a base end jib, 56 is a bracket, and 60 is a connector.

Claims (4)

A jib is added to the distal end of the telescopic boom, and a pair of rope support supports projecting outward in the left and right directions at the base end of the jib and left and right respectively from the upper parts of the left and right masts attached to the base end boom. The tension rope is extended and the tip of each tension rope is connected to the outer end of each rope support support. In a boom working vehicle with a jib provided with a locking part that locks in the vicinity of the tip,
As a preparation for connecting the base end of a jib placed horizontally on the tip of the tip boom, the tip of each of the left and right tension ropes hanging from the top of the left and right masts It is a method of connecting to each outer end of the rope support,
With the top of the mast on the boom side positioned just above the base end of the jib placed horizontally on the ground, the left and right tension ropes are hung vertically from the top of the mast.
First, with one tension rope locked to the locking part, the tip of the one tension rope is moved to the left and right by turning the telescopic boom to move the top and bottom of the outer end of the rope support support on the same side. The tension rope end is adjusted to the height of the outer end of the rope support support by adjusting the feeding length of the tension rope and adjusting the height of the tension rope tip to the height of the outer end of the rope support support. After connecting to the outer end of the rope support,
While the other tension rope is locked to the locking portion, the tip of the other tension rope is moved to the left and right by turning the telescopic boom, so that the outer end of the rope support support on the other side is substantially straight. Next, adjust the feeding length of the tension rope, adjust the height of the tension rope tip to the height of the outer end of the rope support support, and place the tension rope tip on the rope support support. To connect to the outer edge,
The tension rope connection method in the boom working vehicle with a jib provided with the boom lateral deflection suppression apparatus characterized by the above-mentioned. A jib is added to the distal end of the telescopic boom, and a pair of rope support supports projecting outward in the left and right directions at the base end of the jib and left and right respectively from the upper parts of the left and right masts attached to the base end boom. The tension rope is extended and the tip of each tension rope is connected to the outer end of each rope support support. In a boom working vehicle with a jib provided with a locking part that locks in the vicinity of the tip,
As a preparation for connecting the base end of a jib placed horizontally on the tip of the tip boom, the tip of each of the left and right tension ropes hanging from the top of the left and right masts It is a method of connecting to each outer end of the rope support,
With the top of the mast on the boom side positioned just above the base end of the jib placed horizontally on the ground, the left and right tension ropes are hung vertically from the top of the mast.
First, with one tension rope locked to the locking part, the tip of the one tension rope is moved to the left and right by turning the telescopic boom to move the top and bottom of the outer end of the rope support support on the same side. The tension rope tip is adjusted to the height of the outer end of the rope support support by moving the telescopic boom up and down, and the tension rope tip is adjusted to the outer end of the rope support support. After connecting to the part
While the other tension rope is locked to the locking portion, the tip of the other tension rope is moved to the left and right by turning the telescopic boom, so that the outer end of the rope support support on the other side is substantially straight. Next, the height of the tension rope tip is adjusted to the height of the outer end of the rope support support by lifting and lowering the telescopic boom, and the tension rope tip is connected to the outer end of the rope support support. To
The tension rope connection method in the boom working vehicle with a jib provided with the boom lateral deflection suppression apparatus characterized by the above-mentioned. In claim 1 or 2,
When the tip of the tension rope hanging from the top of the mast is displaced forward and backward relative to the outer end of the jib-side rope support support, the tension rope is attached to the locking portion provided near the tip of the tip boom. The telescopic boom is expanded and contracted in a state of locking the tension rope so that the tip end portion of the tension rope is positioned almost directly above the outer end portion of the rope support support.
The tension rope connection method in the boom working vehicle with a jib provided with the boom lateral deflection suppression apparatus characterized by the above-mentioned. After the tension rope connecting method according to any one of claims 1 to 3 is connected to connect the respective distal ends of the left and right tension ropes to the outer ends of the respective rope support supports, they are installed on the boom work vehicle side or the jib side. Aligning the jib base end with the boom tip using the jib base end lifting means, and connecting the jib base end to the boom tip;
A jib coupling method in a boom working vehicle with a jib provided with a boom lateral deflection suppressing device.

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