JP2006206233A5 - - Google Patents

Description

Device for suppressing lateral deflection of telescopic boom of mobile crane

  The present invention relates to a lateral deflection suppressing device for a telescopic boom of a mobile crane.

  The lateral deflection suppressing device for a telescopic boom according to the present invention is applied to the telescopic boom of a mobile crane as shown in FIG.

  As shown in FIG. 5, the mobile crane includes a swivel base 2 that is pivotably mounted on the vehicle 1, a telescopic boom 3 that is pivotably mounted on the swivel base 2, and a distal end portion 3 a of the telescopic boom 3. The extension jib 4 is removably attached to the telescopic boom 3 and can be changed in the undulation angle with respect to the telescopic boom 3. The telescopic boom 3 is removed when the extension jib 4 is removed from the distal end portion 3a of the telescopic boom 3. A crane is engaged with a load (not shown) suspended so as to be able to wind up and down at the distal end so as to be driven freely (hereinafter, referred to as “crane work by the telescopic boom 3”). In the state where the extension jib 4 is attached (the state indicated by the alternate long and short dash line in FIG. 5), a lifting tool (not shown) is suspended from the tip end portion 4a of the extension jib 4 so as to be able to wind up and down. ) Engaged luggage constitute crane work (hereinafter referred to as the "crane work by replenishing jib 4" hereinafter) to perform.

  In FIG. 5, reference numeral 5 denotes a boom hoisting cylinder attached between the telescopic boom 3 and the swivel base 2.

  The “crane work by the telescopic boom 3” uses both the swivel drive of the swivel base 2, the telescopic drive and hoisting drive of the telescopic boom 3, and the hoisting and unwinding drive of the suspension suspended from the tip 3 a of the telescopic boom 3. Move the luggage to the required space position.

  The “crane work by the extension jib 4” includes the swiveling drive of the swivel base 2, the expansion and contraction drive and the undulation drive of the telescopic boom 3, the undulation angle change of the extension jib 4, and the suspension jib 4 suspended from the tip 4 a. The load is moved to a required spatial position by using the hoisting and lowering driving of the hanging tool together.

  In this type of mobile crane, a “longitudinal deflection” and a “lateral deflection” occur in the telescopic boom 3 during crane operation. “Vertical flexure” is a flexure such that the middle portion in the longitudinal direction of the telescopic boom 3 is convex upward in a side view of the telescopic boom 3, and “lateral flexure” is a flexure of the telescopic boom 3 in the rear view of the telescopic boom 3. The bending is such that the middle portion in the longitudinal direction is convex to the left or right.

  Such “longitudinal deflection” and “lateral deflection” reduce the buckling strength of the telescopic boom 3 and reduce the lifting ability during the operation of the mobile crane.

  For this reason, this type of mobile crane is equipped with a deflection suppressing device for suppressing the above-mentioned “vertical deflection” and “lateral deflection” of the telescopic boom 3 generated during crane operation.

As shown in FIG. 5 and FIG.
Left and right arm means 6a, 6b attached to the distal end portion 3a of the telescopic boom 3 so as to extend from the distal end portion 3a of the telescopic boom 3 to the left and right sides, respectively;
Left and right guy ropes 7a, 7b each having its tip connected to the left and right arm means 6a, 6b,
Guy rope base end portion arranged at the middle portion in the longitudinal direction of the telescopic boom 3 or the swivel base 2 (the middle portion in the longitudinal direction of the telescopic boom 3 in FIGS. 5 and 6) connecting the base end portions of the left and right guy ropes 7a, 7b. The connecting means 8 includes left and right guy ropes 7a, 7b stretched between the left and right arm means 6a, 6b on the back side of the telescopic boom 3 and the hoisting locus surface of the telescopic boom 3 (the telescopic boom 3 is Guy rope base end connecting means 8 extending so as to pass through opposite sides of the trajectory plane drawn during undulation driving),
and,
Left and right guy rope length adjusting means 9a, 9b for adjusting the extension length of the left and right guy ropes 7a, 7b, respectively;
It consists of.

  The telescopic boom bending suppression device configured as described above is configured so that the left and right guy ropes 7a and 7b stretched between the left and right arm means 6a and 6b and the guy rope base end connecting means 8 are connected to the left and right guy ropes during crane operation. The length adjusting means 9a and 9b are used in a tensioned state, and the bending ("vertical bending" and "lateral bending") that tends to occur in the telescopic boom 3 during crane work is suppressed by the left and right guy ropes 7a and 7b. can do.

  That is, of the deflections that are to occur in the telescopic boom 3, for the “vertical deflection”, the left and right guy ropes 7 a and 7 b that are stretched between the left and right arm means 6 a and 6 b and the guy rope base end connecting means 8 are used. Since it passes through the back side of the telescopic boom 3, the downward movement of the distal end portion 3a of the telescopic boom 3 is restricted, and as a result, "vertical deflection" is suppressed.

In addition, regarding the “lateral deflection” that is to occur in the telescopic boom 3, the left and right guy ropes 7 a and 7 b stretched between the left and right arm means 6 a and 6 b and the guy rope base end connecting means 8 are connected to the telescopic boom 3. Since the undulation trajectory surfaces of the telescopic boom 3 pass through opposite sides, the movement of the distal end portion 3a of the telescopic boom 3 in the left-right direction is restrained, and as a result, "lateral deflection" is suppressed.
It should be noted that the effect of suppressing this “lateral deflection” is as follows.
When the distal end 3a of the telescopic boom 3 tries to shift in the left-right direction due to the "lateral deflection" of the telescopic boom 3, the tension of the guy rope 7a (or 7b) located on the opposite side to this transition direction increases. The tip of the guy rope 7a (or 7b) is connected to the arm means 6a (or 6b) at a distance L from the undulation trajectory plane of the telescopic boom 3, so that the increased tension of the guy rope 7a (or 7b). Applies a moment to the telescopic boom tip 3a. This moment acting on the telescopic boom tip 3a is a "moment that resists fluctuations in the direction of the direction of the telescopic boom tip 3a when the telescopic boom 3 is laterally deflected in the rear view". Deflection is suppressed.

  This “moment that resists the change in the direction of directivity in the rear view of the telescopic boom tip 3a that occurs when the telescopic boom 3 is deflected laterally” is the distance from the undulation trajectory surface of the telescopic boom 3 at the tip of each of the left and right guy ropes 7a, 7b. The larger L is, the larger it is.

  Further, the “moment against the change in the direction of the direction of the telescopic boom tip 3a when the telescopic boom 3 is laterally deflected in the rear view” refers to the left and right arm means 6a, 6b attached to the telescopic boom tip 3a and the guy rope base. Generated if the left and right guy ropes 7a, 7b stretched between the end connecting means 8 are stretched so as to be positioned on the left and right of the undulation locus surface of the telescopic boom 3 in the rear view of the telescopic boom 3. The guy rope base end connecting means 8 is configured to connect the base ends of the left and right guy ropes 7a and 7b at positions separated from the undulation trajectory plane of the telescopic boom 3 in the left-right direction, or the telescopic boom 3 It does not matter whether it is configured to be connected at a position close to the undulation trajectory plane.

However, the one in which the guy rope base end connecting means 8 is configured to connect the base ends of the left and right guy ropes 7a, 7b at positions separated from the undulation locus surface of the telescopic boom 3 in the left-right direction is more laterally deflected. Great suppression effect.
5 and 6, the base end portion of the telescopic boom 3 is extended in the longitudinal direction of the telescopic boom 3 so that the guy rope base end connecting means 8 extends to the back side of the telescopic boom 3. It is composed of the geimast means 8 attached to the portion, and the base end portions of the pair of left and right guillopes 7a, 7b are connected to the distal end portion of the geimast means 8. The guy mast means (guy rope base end connecting means) 8 is composed of a pair of left and right guy masts 8a and 8b whose upper sides are expanded to the left and right. The base ends of the pair of left and right guy ropes 7a and 7b correspond to each other. It has the structure connected with the front-end | tip part of guy mast 8a, 8b.

  Reference numerals 8a-1 and 8b-1 denote stay ropes for preventing the left and right guy masts 8a and 8b from tilting forward.

  For this reason, the base ends of the left and right guy ropes 7 a and 7 b (the tip portions of the left and right guy masts 8 a and 8 b in the left and right guy mast means 8 constituting the guy rope base end connecting means 8) are separated from the back side of the telescopic boom 3. The left and right guy ropes 7a, 7b stretched between the left and right arm means 6a, 6b and the guy rope base end coupling means 8 are located on the back side of the telescopic boom 3 and on the undulating locus surface of the telescopic boom 3. It goes through the other side.

However, the guy rope base end connecting means 8 is such that the left and right guy ropes 7a, 7b stretched between the left and right arm means 6a, 6b are located on the back side of the telescopic boom 3 and on the undulating locus surface of the telescopic boom 3. Any device can be used as long as it is stretched so as to pass through the opposite side.
5 and 6, the left and right guy rope length adjusting means 9a, 9b are constituted by left and right winches arranged on the guy rope base end connecting means 8, The right and left guy rope length adjusting means 9a, 9b may be any means as long as the length of the corresponding left and right guy ropes 7a, 7b is adjusted and tensioned, and the right and left arm means 6a, 6b are used. The one arranged in is also known.
US Patent Publication US2002 / 0070187A1

  By the way, in the conventional telescopic boom deflection suppressing device, the above-described pair of left and right arm means 6a, 6b cannot change the separation distance L from the undulation trajectory surface of the telescopic boom 3 at the distal ends of the left and right guy ropes 7a, 7b. Even if it is “crane work at the tip of the telescopic boom 3” or “crane work at the tip of the extension jib 4”, “the telescopic boom tip 3a generated when the telescopic boom 3 is laterally deflected” The moment against the variation in the pointing direction in the rear view is the same.

  However, as regards the direction change in the rear view of the telescopic boom tip 3 a that occurs when the telescopic boom 3 “laterally bends”, in the “crane work at the tip of the extension jib 4”, a moment that promotes the moment from the extension jib 4. Although the telescopic boom tip 3a acts, in the “crane work at the telescopic boom 3 tip”, a moment that promotes it does not act on the telescopic boom tip 3a.

  Therefore, in the conventional telescopic boom bending restraint device in which the distance L from the telescopic boom hoisting locus surface of each of the left and right guy ropes 7a, 7b cannot be changed, the “extension / contraction” suitable for “crane work at the telescopic boom front end 3a”. The telescopic boom 3 undulation trajectory of the respective distal ends of the left and right guy ropes 7a, 7b so that the "moment against the fluctuation in the direction of the direction of the telescopic boom distal end 3a in the rear view generated when the boom 3 is laterally deflected" acts on the telescopic boom distal end 3a. When the separation distance L from the surface is set (the left and right arm means 6a and 6b are thus configured), in the “crane work at the tip of the extension jib 4”, “the tip of the telescopic boom 3a generated when the telescopic boom 3 is laterally deflected” The moment that resists fluctuations in the direction of the head in the rear view is insufficient, and the “lateral deflection” of the telescopic boom 3 cannot be effectively suppressed. There was.

  In the present invention, “a moment that resists fluctuation in the direction of the telescopic boom tip 3a when the telescopic boom 3 is laterally deflected in the rear view” is referred to as “crane work at the tip of the telescopic boom 3” and “tip of the extension jib 4”. The main object of the present invention is to provide a lateral deflection suppressing device for a telescopic boom that can be changed to an effective value according to “crane work”.

  In order to achieve the above-mentioned main object, the lateral deflection suppressing device for a telescopic boom of a mobile crane according to claim 1 of the present invention comprises a pair of left and right arm means 6a and 6b in the conventional telescopic boom deflection suppressing device described above. The distance L between the distal ends of the left and right guy ropes 7a, 7b connected to the left and right arm means 6a, 6b can be changed from the undulation locus surface of the telescopic boom 3.

  The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 1 configured as described above, by changing the separation distance L between the distal ends of the left and right guy ropes 7a, 7b from the undulation trajectory surface of the telescopic boom 3. “Moment against the change in the direction of the head in the rear view of the distal end 3a of the telescopic boom 3 generated when the telescopic boom 3 is laterally deformed” is referred to as “crane work at the distal end of the telescopic boom 3” and “the end of the extension jib 4”. It can be changed to an effective value according to "crane work". Therefore, there is an effect that the crane performance of the mobile crane can be utilized more effectively.

  The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 2 of the present invention is subordinate to the lateral deflection suppressing device for the telescopic boom according to claim 1 described above, and includes the right and left guy ropes 7a and 7b. Each distal end portion is connected to the extended end portions 6a-1 and 6b-1 of the left and right arm means 6a and 6b, and the left and right arm means 6a and 6b are connected to the extended end portions 6a-1 and 6b-. The amount of extension L to the side from the front end 3a of one telescopic boom 3 can be changed.

The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 2 configured as described above, in addition to the above-described effect of the lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 1, There is an effect that the amount of extension from the front end portion 3a of the telescopic boom 3 of 6b to the side can be suppressed to the necessary minimum.
The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 3 of the present invention is subordinate to the lateral deflection suppressing device for the telescopic boom according to claim 2, and the left and right arm means 6a, 6b. Are respectively attached to the distal end portion 3a of the telescopic boom 3 via the pivot shafts 10 and 10 so as to be rotatable, and the guy ropes 7a and 7b corresponding to the extended end portions 6a-1 and 6b-1 are respectively mounted. It is characterized by comprising pivot arms 11 and 11 with their tip portions connected, and arm pivot fixing means 12 and 12 for fixing the pivot arms 11 and 11 to a required pivot position. Is.

The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 3 configured as described above has the above-mentioned effects of the lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 2, in addition to the arm means 6a, By fixing the 6b at the required rotational position, the amount of extension of the arm means 6a, 6b from the distal end 3a of the telescopic boom 3 to the side can be changed, so that the distal ends of the left and right guy ropes 7a, 7b can be changed. There is an effect that the separation distance L from the undulation locus surface of the telescopic boom 3 can be easily changed.
The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 4 of the present invention is subordinate to the lateral deflection suppressing device for the telescopic boom according to claim 3, and the distal end portion 3 a of the telescopic boom 3. Between the appropriate positions of the rotating arms 11 and 11, arm rotating hydraulic cylinders 12 and 12 for rotating the rotating arms 11 and 11 around the pivot axes 10 and 10 are interposed. The arm rotation hydraulic cylinders 12 and 12 are configured to form the arm rotation fixing means 12 and 12 by hydraulically locking the cylinders 12 and 12.

The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 4 configured as described above, in addition to the above-described effect of the lateral deflection suppressing device for the telescopic boom of the mobile crane, is provided. By locking the cylinders 12 and 12 in a telescopic manner and hydraulically, the distance L from the telescopic boom 3 distal end portion 3a at each distal end portion of the left and right guy ropes 7a and 7b can be more easily changed. is there.
The lateral restraint device for the telescopic boom deflection of the mobile crane according to claim 5 of the present invention is subordinate to the lateral restraint device for the telescopic boom according to claim 2 described above, and the left and right arm means 6a, Each of 6b has telescopic arms 13 and 13 whose base ends are attached to the distal end 3a of the telescopic boom 3 so as not to swing, and arm telescopic fixing for fixing the telescopic arms 13 and 13 at a required extension position. The telescopic booms of the extended end portions 6a-1 and 6b-1 are configured by fixing the telescopic arms 13 and 13 at a required extension position by the arm telescopic fixing units 14 and 14. 3. It is configured to be able to change the separation distance L from the undulating locus surface.
The mobile crane telescopic boom lateral deflection suppressing device according to claim 5 configured as described above has the above-described effects of the mobile crane telescopic boom lateral deflection suppressing device according to claim 2, in addition to the arm means 6a, By fixing 6b to a required extension position, the amount of arm means 6a, 6b extending from the distal end 3a of the telescopic boom 3 to the side can be changed, so that the telescopic booms at the distal ends of the left and right guy ropes 7a, 7b can be changed. There is an effect that the separation distance L from the undulation locus surface 3 can be easily changed.
The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 6 of the present invention is subordinate to the lateral deflection suppressing device for the telescopic boom according to claim 5 described above. The arm extendable hydraulic cylinders 14 and 14 for extending and retracting the extendable arms 13 and 13 are arranged, and the arm extendable hydraulic cylinders 14 and 14 are hydraulically locked to lock the arm extendable hydraulic cylinders 14 and 14. 14 is configured to form the arm expansion / contraction fixing means 14, 14.
According to the sixth aspect of the present invention, the lateral bending restraining device for the telescopic boom of the mobile crane according to claim 6 has the above-described effects of the lateral deflection restraining device for the telescopic boom of the mobile crane. By locking the cylinders 14 and 14 in a telescopic manner and hydraulically, the distance L from the distal end 3a of the telescopic boom 3 at the distal ends of the left and right guy ropes 7a and 7b can be changed more easily. is there.

  The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 7 of the present invention is subordinate to the lateral deflection suppressing device for the telescopic boom according to claims 1 to 6, and includes a pair of left and right arm means. 6a and 6b are characterized in that they are attached to the distal end portion 3a of the telescopic boom 3 via an attachment frame A that is detachably attached to the distal end portion 3a of the telescopic boom 3.

  The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 7 configured as described above has the lateral deflection suppressing device for the telescopic boom of the mobile crane according to claims 1 to 6 which is dependent thereon. In addition to the effect, the attachment / detachment of the pair of left and right arm means 6a, 6b to / from the distal end 3a of the telescopic boom 3 can be performed through the attachment / detachment of the attachment frame A to / from the distal end 3a of the telescopic boom 3. The pair of arm means 6a and 6b) can be easily attached and detached.

  The lateral deflection suppressing device for a telescopic boom of a mobile crane according to an eighth aspect of the present invention is dependent on the lateral deflection suppressing device for an telescopic boom according to the first to seventh aspects, and is a guy rope base end. The part connecting means 8 is composed of a gaimast means 8 having a lower end portion attached to the middle part in the longitudinal direction of the telescopic boom 3 or the swivel base 2 so as to extend to the back side of the telescopic boom 3. Each base end part of a pair of left and right guy ropes 7a and 7b is connected to the tip part.

  The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 8 configured as described above has the lateral deflection suppressing device for the telescopic boom of the mobile crane according to claims 1 to 7, which is dependent thereon. In addition to the effect, it is possible to increase the amount of separation of the base ends of the pair of left and right guy ropes 7a, 7b to the back side of the telescopic boom 3 by the guy mast means 8, thereby ensuring the effect of suppressing "lateral deflection". There is an effect that it is easy.

The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 9 of the present invention is subordinate to the lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 8 described above. Is composed of a pair of left and right guy masts 8a and 8b whose upper sides are expanded from each other, and the base ends of the pair of left and right guy ropes 7a and 7b are the distal ends (extension ends) of the corresponding guy masts 8a and 8b. It is characterized by being connected to.

The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 9 configured as described above, in addition to the above-described effect of the lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 8, It is possible to increase the distance in the left-right direction from the undulation locus surface of the telescopic boom 3 at the base end portions of the left and right guy ropes 7a, 7b, and it is easy to ensure the effect of suppressing the “lateral deflection”.

  The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 10 of the present invention is dependent on the lateral deflection suppressing device for the telescopic boom according to any one of claims 1 to 7, and includes a guy rope base end connection. The means 8 is characterized in that it is arranged on the swivel base 2 so as to connect the base ends of the left and right guy ropes 7a, 7b at a position separated from the back side of the telescopic boom 3.

  The lateral deflection suppressing device for a telescopic boom of a mobile crane according to claim 10 configured as described above has the above effect of the lateral deflection suppressing device for an extendable boom of a mobile crane according to claims 1 to 7. In addition, since the guy rope base end connecting means 8 can be directly arranged on the swivel base 2, there is an effect that the guy rope base end connecting means 8 can be realized with a simple configuration.

  The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 11 of the present invention is subordinate to the lateral deflection suppressing device for the telescopic boom according to claim 10 and is arranged on the swivel base 2. The guy rope base end connecting means 8 is composed of a pair of left and right connecting tools arranged left and right away from the undulation trajectory plane of the telescopic boom 3, and the base ends of the pair of left and right guy ropes 7a and 7b correspond to each other. It is connected to a connector.

  The lateral deflection suppressing device for a telescopic boom of a mobile crane according to claim 11 configured as described above, in addition to the above-described effect of the lateral deflection suppressing device for an extendable boom of a mobile crane according to claim 10, Since the base end portions of the left and right guy ropes 7a and 7b are located in the left and right direction away from the telescopic boom 3 undulation locus surface, there is an effect that it is easy to ensure the effect of suppressing the “lateral deflection”.

  The lateral deflection suppressing device for a telescopic boom of a mobile crane according to a twelfth aspect of the present invention is dependent on the lateral deflection suppressing device for an telescopic boom according to the above-described first to eleventh embodiments. A lateral deflection suppressing device for a telescopic boom of a mobile crane, characterized in that the adjusting means comprises a pair of left and right winches arranged on the guy rope base end connecting means 8.

  The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 12 configured as described above has the lateral deflection suppressing device for the telescopic boom of the mobile crane according to claims 1 to 11 which is dependent thereon. In addition to the effect, there is an effect that the length adjustment of the left and right guy ropes 7a, 7b can be easily performed with a pair of left and right winches arranged in the guy rope base end connecting means 8.

  The effects of the lateral deflection restraining device for the telescopic boom of the mobile crane according to the present invention have already been described for each claim (Claim 1 to Claim 11) in the section “Means for Solving the Problems”. Therefore, it will be used and explanation here is omitted.

(Example)
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  The greatest structural feature of the lateral deflection suppressing device for the telescopic boom according to the present invention is that the left and right guy ropes 7a and 7b connected to the left and right arm means 6a and 6b are connected to the left and right arm means 6a and 6b. The telescopic boom 3 is configured such that the separation distance L from the undulation locus surface can be changed.

  Accordingly, a preferred embodiment of the left and right arm means 6a, 6b, in which the distance L between the distal ends of the left and right guy ropes 7a, 7b from the telescopic boom 3 undulation locus surface can be changed, will be described with reference to FIGS. To do.

  Since the configuration other than the arm means 6a and 6b has the same configuration as that of the conventional telescopic boom deflection suppressing device, in the following description, the configuration described in the above-mentioned “Background Art” column is used as it is. Incorporate.

  FIG. 1 is a view showing an embodiment of the arm means 6a and 6b of the telescopic boom lateral deflection suppressing device according to the present invention, in which the left and right arm means are shown in a rear view of the telescopic boom.

  In FIG. 1, the left and right arm means 6a, 6b attached to the distal end portion 3a of the telescopic boom 3 so as to extend from the distal end portion 3a of the telescopic boom 3 to the left and right sides respectively correspond to the distal ends of the corresponding guy ropes 7a, 7b. Are connected at the positions where the distance L from the telescopic boom 3 undulation locus surface is different.

  For this reason, by selectively connecting the distal ends of the guy ropes 7a and 7b corresponding to the connecting portions P1 to P3 of the left and right arm means 6a and 6b, the telescopic boom 3 undulation locus surface of the distal ends of the guy ropes 7a and 7b can be seen. The separation distance L can be changed stepwise between L1 and L3.

  In this embodiment, a lateral deflection suppressing device for a telescopic boom according to claim 1 of the present invention is embodied.

  In FIG. 1, the pair of left and right arm means 6 a and 6 b are attached to the distal end portion 3 a of the telescopic boom 3 via an attachment frame A that is detachably attached to the distal end portion 3 a of the telescopic boom 3. This is a lateral deflection suppressing device for a telescopic boom according to claim 7 of the present invention, and the dependent part of claim 1 is embodied.

  However, it goes without saying that the pair of left and right arm means 6a and 6b may be directly attached to the distal end portion 3a of the telescopic boom 3.

  2 and 3 show another embodiment of the arm means of the lateral deflection suppressing device for the telescopic boom according to the present invention. 2 shows the left and right arm means 6a and 6b attached to the distal end portion 3a of the telescopic boom 3 so as to extend from the distal end portion 3a of the telescopic boom 3 to the left side and the right side, respectively, in a rear view of the telescopic boom 3. FIG. 3 is a view taken in the direction of arrows XX in FIG.

2 and 3, the left and right arms attached to the distal end portion 3a of the telescopic boom 3 so that the distal end portions of the left and right guy ropes 7a, 7b extend from the distal end portion 3a of the telescopic boom 3 to the left side and the right side, respectively. The left and right arm means 6a and 6b are connected to the extension ends 6a-1 and 6b-1 of the means 6a and 6b, respectively, and the distal ends 3a of the telescopic boom 3 of the extension ends 6a-1 and 6b-1 are connected. The amount of extension L from the side to the side can be changed.
Each of the left and right arm means 6a, 6b is pivotally attached to the distal end portion 3a of the telescopic boom 3 via the pivot shafts 10, 10, and is attached to the extended end portions 6a-1, 6b-1. Rotating arms 11 and 11 connected to the tip ends of the corresponding guy ropes 7a and 7b, and arm rotating fixing means 12 and 12 for fixing the rotating arms 11 and 11 to a required rotating position. ing.

  The pivots 10 and 10 are arranged so that the rotation trajectory surfaces of the corresponding rotation arms 11 and 11 intersect the telescopic boom 3 undulation trajectory surface. Thereby, the rotation arms 11 and 11 are separated from the telescopic boom 3 undulation locus surface of the extended ends 6a-1 and 6b-1 of the rotation arms 11 and 11 by the rotation about the pivots 10 and 10. The distance L changes.

  For this reason, the extension arms 11 and 11 of the left and right arm means 6a and 6b are rotated to the required positions and fixed by the arm rotation fixing means 12 and 12, so that the telescopic booms at the distal ends of the guy ropes 7a and 7b can be obtained. 3 The separation distance L from the undulating locus surface can be arbitrarily changed. In this embodiment, a lateral deflection suppressing device for a telescopic boom according to claims 1 to 3 of the present invention is embodied.

  2 and 3, the arm rotation fixing means 12 and 12 are constituted by arm rotation hydraulic cylinders. These arm turning hydraulic cylinders (arm turning fixing means) 12 and 12 are interposed between the distal end 3a side of the telescopic boom 3 and the rotating arms 11 and 11 at appropriate positions. The pivot arms 11 and 11 are pivoted around the pivots 10 and 10 and are hydraulically locked, whereby the arm pivot hydraulic cylinders (arm pivot fixing means) 12 and 12 are connected to the pivot arms 11 and 11. The rotation can be locked. Here, a lateral deflection suppressing device for a telescopic boom according to claim 4 of the present invention is embodied.

  2 and 3, the pair of left and right arm means 6 a and 6 b is connected to the distal end portion 3 a of the telescopic boom 3 via an attachment frame A that is detachably attached to the distal end portion 3 a of the telescopic boom 3. Is attached. This is a lateral deflection suppressing device for a telescopic boom according to claim 7 of the present invention, and parts dependent on claims 1 to 4 are embodied.

  However, it goes without saying that the pair of left and right arm means 6a and 6b may be directly attached to the distal end portion 3a of the telescopic boom 3.

  FIG. 4 shows still another embodiment of the arm means of the lateral deflection suppressing device for the telescopic boom according to the present invention. FIG. 4 shows the left and right arm means 6a, 6b attached to the distal end portion 3a of the telescopic boom 3 so as to extend from the distal end portion 3a of the telescopic boom 3 to the left and right sides, respectively, in a rear view of the telescopic boom 3. Is.

  In FIG. 4, left and right arm means 6a attached to the distal end portion 3a of the telescopic boom 3 so that the distal ends of the left and right guy ropes 7a, 7b extend from the distal end portion 3a of the telescopic boom 3 to the left and right sides, respectively. The left and right arm means 6a and 6b are connected to the extended end portions 6a-1 and 6b-1 of the 6b, and the extended end portions 6a-1 and 6b-1 are on the side from the distal end portion 3a of the telescopic boom 3. The extension amount L to the direction can be changed.

  Each of the left and right arm means 6a and 6b has telescopic arms 13 and 13 whose base end portions are attached to the distal end portion 3a of the telescopic boom 3 so as not to swing, and the telescopic arms 13 and 13 are in a required extended position. The arm extension / contraction fixing means 14 and 14 are fixed to each other. The arm extension / contraction fixing means 14 and 14 are used to fix the extension / contraction arms 13 and 13 to a required extension position, thereby extending the extension end portions 6a-1 and 6a-1. A lateral extension amount L from the distal end 3a of the telescopic boom 3 of 6b-1 can be changed.

  For this reason, by extending the telescopic arms 13 and 13 in the left and right arm means 6a and 6b to a required position and fixing them by the arm telescopic fixing means 14 and 14, the telescopic boom 3 undulation locus of the end portions of the guy ropes 7a and 7b is obtained. The separation distance L from the surface can be arbitrarily changed. In this embodiment, the lateral deflection suppressing device for the telescopic boom according to claims 1, 2 and 5 of the present invention is embodied.

  In the example shown in FIG. 4, the arm expansion / contraction fixing means 14, 14 is constituted by an arm expansion / contraction hydraulic cylinder. The arm expansion / contraction hydraulic cylinders (arm expansion / contraction fixing means) 14, 14 are disposed on the expansion / contraction arms 13, 13. The expansion / contraction arms 13, 13 are expanded / contracted by operating the expansion / contraction arms 13, 13 and are hydraulically locked. As a result, the arm expansion / contraction hydraulic cylinders (arm expansion / contraction fixing means) 14, 14 can lock the expansion / contraction of the expansion / contraction arms 13, 13. Here, the telescopic boom bending suppression device according to claim 6 of the present invention is embodied.

  4, the pair of left and right arm means 6a and 6b is attached to the distal end portion 3a of the telescopic boom 3 via an attachment frame A that is detachably attached to the distal end portion 3a of the telescopic boom 3. ing. Here, the telescopic boom deflection suppressing device according to claim 7 of the present invention, which is subordinate to claims 1, 2, 5 and 6, respectively, is embodied.

  However, it goes without saying that the pair of left and right arm means 6a and 6b may be directly attached to the distal end portion 3a of the telescopic boom 3.

  The embodiment of the lateral deflection suppressing device for the telescopic boom according to claims 1 to 7 of the present invention has been described with reference to FIGS. 1 to 4. Here, as shown in claim 7, a pair of left and right arm means is provided. 6a and 6b can be freely attached to the telescopic boom 3 tip 3a when the telescopic boom 3 is attached to the telescopic boom 3 tip 3a via a mounting frame A detachably attached to the telescopic boom 3 tip 3a. I will explain how to install.

  As shown in FIG. 5, the extension jib 4 includes a jib attachment frame 4c that is detachably attached to the distal end portion 3a of the telescopic boom 3, and a jib main body 4b that has a base end portion attached to the jib attachment frame 4c in a undulating manner. However, when the left and right arm means 6b, 6b are attached to the tip 3a of the telescopic boom 3 via the attachment frame A, the jib attachment frame 4c in the jib 4 is removed by adding to the attachment frame A. It can be attached freely (the jib 4 is detachably attached to the distal end 3a of the telescopic boom 3 via the mounting frame A), or the jib mounting frame 4c of the jib 4 can be directly attached to and detached from the distal end 3a of the telescopic boom 3. The left and right arm means 6a, 6a are attached to the jib attachment frame 4c (the jib attachment frame 4c in the jib 4 is used as the attachment frame A). Use to) as may be.

  The greatest structural feature of the lateral deflection suppressing device for the telescopic boom according to the present invention resides in the left and right arm means 6a and 6b. This has already been described with reference to FIGS. Next, the configuration of the guy rope base end connection means 8 of the telescopic boom lateral deflection suppressing device according to the present invention will be described.

  The guy rope base end connecting means 8 is arranged at the longitudinal middle part of the telescopic boom 3 or the swivel base 2 to connect the base ends of the left and right guy ropes 7a, 7b, and is connected to the left and right arm means 6a, 6b. The left and right guy ropes 7a, 7b stretched between them pass on the back side of the telescopic boom 3 and on opposite sides of the hoisting trajectory surface of the telescopic boom 3 (the trajectory surface drawn by the telescopic boom 3 during its hoisting drive). It is to be stretched.

  Such a guy rope base end connecting means 8 comprises a lower end of the telescopic boom 3 that is extended to the rear side of the telescopic boom 3 and a middle mast 8 attached to the swivel base 2 or the gamma mast means 8 attached thereto. You may make it connect each base end part of a pair of right and left guy ropes 7a and 7b to the front-end | tip part (extension end part) of this moth mast means 8. FIG. In this case, the guy mast means 8 constituting the guy rope base end connecting means may be configured to extend to the back side of the telescopic boom 3 along the undulation locus surface of the telescopic boom 3.

  This is a lateral deflection suppressing device for a telescopic boom according to claim 8 of the present invention, and parts dependent on claims 1 to 7 are embodied.

Further, when the guy rope base end connecting means 8 is constituted by the above-described guy mast means 8, the guy mast means 8 is arranged upward as shown in FIGS. 5 and 6 and described in the section of “Background Art”. May be configured by a pair of left and right guy masts 8a and 8b that expand to each other, and the base end portions of the pair of left and right guy ropes 7a and 7b may be connected to the tip ends of the corresponding guy masts.

5 and 6, the guy mast means 8 constituted by a pair of left and right guy masts 8 a and 8 b is arranged in the middle portion in the longitudinal direction of the telescopic boom 3, but this may be arranged on the swivel base 2. Of course.

Here, a lateral deflection suppressing device for a telescopic boom according to a ninth aspect dependent on the eighth aspect of the present invention is embodied.

Further, the gyrus base end connecting means 8 is connected to the base end parts of the left and right guy ropes 7a and 7b at a position separated from the back side of the telescopic boom 3 without using the above-described gamast means 8. 2 may also be configured.
In this case, the guy rope base end connecting means 8 may be disposed on the undulation locus surface of the telescopic boom 3.

  In this case, the telescopic boom lateral deflection suppressing device according to the tenth aspect of the present invention is embodied by the subordinate parts of the first to seventh aspects.

  Further, the guy rope base end connecting means 8 is arranged on the swivel base 2 so as to connect the base ends of the left and right guy ropes 7a and 7b at a position separated from the back side of the telescopic boom 3 without using the guy mast means 8. In the configuration, the guy rope base end connecting means 8 is constituted by a pair of left and right connecting tools (not shown) arranged left and right away from the undulation locus surface of the telescopic boom 3, and a pair of left and right guy ropes. You may make it connect the base end part of 7a, 7b to a corresponding connector.

Here, a lateral deflection suppressing device for a telescopic boom according to claim 11 that is dependent on claim 10 of the present invention is embodied.
Next, the left and right guy rope length adjusting means 9a, 9b will be described. These left and right guy rope length adjusting means 9a, 9b may be constituted by a pair of left and right winches arranged on the guy rope base end connecting means 8, or a pair of left and right arm means 6a, 6b. You may comprise a winch.
In the former configuration, a lateral deflection suppressing device for a telescopic boom according to a twelfth aspect of the present invention, which is a portion dependent on the first to eleventh aspects, is embodied.

It is drawing which shows one Example of the arm means of the lateral bending suppression apparatus of the telescopic boom which concerns on this invention, Comprising: Left and right arm means are displayed by the back view of the telescopic boom. It is drawing which shows the other Example of the arm means of the lateral bending suppression apparatus of the telescopic boom which concerns on this invention, Comprising: Left and right arm means are displayed by the back view of the telescopic boom. FIG. 3 is an XX arrow view of FIG. 2. It is drawing which shows the further another Example of the arm means of the horizontal deflection | deviation control apparatus of the telescopic boom which concerns on this invention, Comprising: Left and right arm means are displayed by the back view of the telescopic boom. It is explanatory drawing which displayed the mobile crane equipped with the expansion-contraction boom bending suppression apparatus which concerns on the past and this invention from the side view side of the expansion-contraction boom. It is explanatory drawing which displayed the telescopic boom bending suppression apparatus shown in FIG. 5 from the back view side of the telescopic boom.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Turntable 3 Telescopic boom 3a Tip part 4 of extension boom 3 Extension jib 4a Tip part 4b of extension jib 4 Jib main body 4c Jib attachment frame 5 Boom hoisting cylinders 6a and 6b Arm means 6a-1 and 6b -1 Extension end portions 7a, 7b of arm means 6a, 6b Guy rope 8 Guy rope base end connecting means, Guy mast means 8a, 8b Guy mast,
8a-1, 8b-1 Retaining ropes 9a, 9b Guy rope length adjusting means 10, 10 Axis 11, 11 Rotating arm 12, 12 Arm rotating fixing means, Arm rotating hydraulic cylinder 13, 13 Telescopic arm 14, 14 Arm Telescopic fixing means, arm telescopic hydraulic cylinder A Mounting frame L Separation distances P1 to P3 (from the telescopic boom 3 undulation trajectory surface at the ends of the guy ropes 7a and 7b)

Claims (12)

A swivel base 2 attached to the vehicle 1 so as to be capable of being swiveled, a telescopic boom 3 attached to the swivel base 2 so that it can be driven up and down, and an extension jib 4 that is removably attached to the tip 3a of the telescopic boom 3. A suspension tool that includes an extension jib 4 capable of changing the undulation angle with respect to the boom 3 and that is hung so as to be freely wound up and down at the distal end of the telescopic boom 3 in a state where the additional jib 4 is detached from the distal end 3a of the telescopic boom 3. Thus, in a state in which the extension jib 4 is attached to the distal end portion 3a of the telescopic boom 3, a mobile crane configured to perform crane work with a lifting tool that is hoisted and wound down freely at the distal end portion of the extension jib 4 A lateral deflection suppressing device for an extendable boom used in
Left and right arm means 6a, 6b attached to the distal end portion 3a of the telescopic boom 3 so as to extend from the distal end portion 3a of the telescopic boom 3 to the left and right sides, respectively;
Left and right guy ropes 7a, 7b each having its tip connected to the left and right arm means 6a, 6b,
Guy rope base end connecting means 8 which is arranged on the middle part in the longitudinal direction of the telescopic boom 3 or the swivel 2 and connects the base end parts of the left and right guy ropes 7a, 7b, with the left and right arm means 6a, 6b Guy rope base end connecting means 8 for stretching the right and left guy ropes 7a, 7b stretched between them on the back side of the telescopic boom 3 and on the opposite sides of the undulation locus surface of the telescopic boom 3, and
-Left and right guy rope length adjusting means 9a and 9b for adjusting the extension length of the left and right guy ropes 7a and 7b, respectively.
And a pair of left and right arm ropes 6a, 6b, which are configured to suppress lateral deflection that is likely to occur in the telescopic boom during crane work by tensioning the pair of left and right guy ropes 7a, 7b during crane work. Is configured so that the distance L between the distal ends of the left and right guy ropes 7a and 7b connected to the left and right arm means 6a and 6b can be changed from the undulation locus surface of the telescopic boom 3. Lateral deflection suppression device for telescopic booms . 2. The lateral deflection suppressing device for a telescopic boom of a mobile crane according to claim 1, wherein the distal ends of the left and right guy ropes 7a, 7b are respectively extended to the extended ends 6a-1, 6b-1 of the left and right arm means 6a, 6b. The left and right arm means 6a, 6b are connected so that the amount of extension from the distal end 3a of the telescopic boom 3 to the sides of the extended ends 6a-1, 6b-1 can be changed. A lateral deflection suppressing device for a telescopic boom of a mobile crane. In the horizontal deflection suppressing device of the telescopic boom of a mobile crane according to claim 2, wherein the left and right arm means 6a, each of 6b, times the base end portion to the telescopic boom 3 tip 3a via the pivot 10, 10 Rotating arms 11, 11 connected to the distal ends of guy ropes 7 a, 7 b corresponding to the extended ends 6 a-1, 6 b-1, and the rotating arms 11, 11 being rotated as required. A lateral deflection suppressing device for a telescopic boom of a mobile crane, characterized by comprising arm rotation fixing means 12 , 12 for fixing to a position. 4. The apparatus for suppressing lateral deflection of a telescopic boom of a mobile crane according to claim 3, wherein the pivot arms 11 and 11 are pivoted around pivots 10 and 10 between appropriate positions of the telescopic boom 3 tip 3a side and the pivot arms 11 and 11, respectively. Arm rotating hydraulic cylinders 12 and 12 for rotating are interposed, and the arm rotating hydraulic cylinders 12 and 12 are hydraulically locked to cause the arm rotating hydraulic cylinders 12 and 12 to rotate the arm. An apparatus for preventing lateral deflection of a telescopic boom of a mobile crane, characterized in that the movement fixing means 12 , 12 are formed. 3. The lateral deflection suppressing device for a telescopic boom of a mobile crane according to claim 1 or 2 , wherein each of the left and right arm means 6a, 6b has a base end portion attached to the distal end portion 3a of the telescopic boom 3 so as not to swing. The telescopic arms 13 and 13 and the telescopic arms 13 and 13 for fixing the telescopic arms 13 and 13 at a required extension position are configured by the arm telescopic fixing units 14 and 14. The movable type is characterized in that the separation distance L between the extended end portions 6a-1 and 6b-1 can be changed from the undulating locus surface of the telescopic boom 3 by fixing 13 at a required extension position. Lateral deflection control device for crane's telescopic boom . In the mobile crane telescopic boom lateral deflection suppressing device according to claim 5, the telescopic arms 13 and 13 are provided with arm telescopic hydraulic cylinders 14 and 14 for extending and retracting the telescopic arms 13 and 13, respectively. A movable type characterized in that the arm expansion / contraction hydraulic cylinders 14 and 14 form the arm expansion / contraction fixing means 14 and 14 by hydraulically locking the arm expansion and contraction hydraulic cylinders 14 and 14. Lateral deflection control device for crane's telescopic boom . 7. The apparatus for suppressing lateral deflection of a telescopic boom of a mobile crane according to claim 1, wherein the pair of left and right arm means 6a, 6b is telescopic through an attachment frame A that is detachably attached to the distal end portion 3a of the telescopic boom 3. A lateral deflection suppressing device for a telescopic boom of a mobile crane, which is attached to a distal end portion 3a of the boom 3. 8. The lateral deflection suppressing device for a telescopic boom of a mobile crane according to claim 1, wherein the lower end of the telescopic boom 3 is extended so that the guy rope base end connecting means 8 extends to the back side of the telescopic boom 3. It is composed of a geimast means 8 attached to the middle part in the longitudinal direction or the swivel base 2. An apparatus for preventing lateral deflection of a telescopic boom of a mobile crane. 9. The apparatus for suppressing lateral deflection of a telescopic boom of a mobile crane according to claim 8, wherein the moth mast means 8 is composed of a pair of left and right ge masts 8a, 8b whose upper sides are expanded from each other. A lateral deflection suppressing device for a telescopic boom of a mobile crane, characterized in that each base end portion is connected to a distal end portion (extending end portion) of the corresponding gamast 8a, 8b. 8. The lateral deflection suppressing device for a telescopic boom of a mobile crane according to claim 1, wherein the base of the left and right guy ropes 7a and 7b is located at a position where the guy rope base end connecting means 8 is separated from the rear side of the telescopic boom 3. A lateral deflection suppressing device for a telescopic boom of a mobile crane, wherein the device is disposed on a swivel base 2 so as to connect end portions. The lateral deflection suppressing device for the telescopic boom of the mobile crane according to claim 10, wherein the guy rope base end connecting means 8 disposed on the swivel base 2 is disposed to be separated from the undulation trajectory plane of the telescopic boom 3 to the left and right. A lateral deflection suppressing device for a telescopic boom of a mobile crane, comprising a pair of coupling tools, wherein the base end portions of a pair of left and right guy ropes 7a, 7b are coupled to corresponding coupling tools. 12. The lateral deflection suppressing device for a telescopic boom of a mobile crane according to claim 1 to claim 11, wherein the left and right guy rope length adjusting means 9a, 9b are configured as a pair of left and right winches arranged on the guy rope base end connecting means 8. A device for suppressing lateral deflection of a telescopic boom of a mobile crane.