JPS58177891A - Overhanging and encasing method for extension jib in wheel type crane - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for extending and retracting a supplementary jib in a wheel crane such as a truck crane or a rough terrain crane.

The replenishment jib that is added to the telescopic zoom in a wheeled crane has a truss-type cantilever jib with a truss structure and a number of connecting rods between the side rods made of a pair of square pipes, etc. There are two types of suspension rod supported compression column type jibs (hereinafter simply referred to as truss type jigs and compression column type jibs), which are formed into a flat shape.Of these, the latter is preferred in terms of manufacturing cost and weight. Compression column jibs are considered advantageous. On the other hand, there are generally two methods for storing the supplementary jib: a bottom-holding type in which the jib is folded onto the lower surface of the boom, and a side-holding type in which the jib is folded on the side surface of the boom. In both of these storage methods, the vertical thickness due to the boom and jib becomes larger in the case of the lower holding type, so
Visibility when driving is reduced, especially side visibility. In addition, if visibility is to be improved, the overall height of the crane vehicle will increase, which also poses a problem when traveling. On the other hand, in the case of the side-carrying type, although the side visibility is widened, the thickness in the left-right direction is also large, which poses a problem in that it makes it difficult to turn on narrow roads.

Conventionally, in order to ensure both side visibility and the ability to run in narrow spaces, when using a compression column type jib, we have taken into consideration the ability to run in narrow spaces and have adopted a lower-hugging retraction system, while using a truss type jib. In some cases, a horizontal storage system has been adopted in consideration of side visibility, but the reality is that this is not a fundamental solution as problems with either side remain.

In addition, regarding the work of extending and storing the jig, in the above-mentioned side-holding method, the jib can be held from the side to the front on a horizontal plane by \゛18
0°1806 rotation, large space must be secured on the sides. In addition, with the lower holding method, it was extremely troublesome to rotate the jib 180 degrees from below and then pass the main hook between the jib feet when extending the jib.

The present invention has been made in view of the above-mentioned circumstances, and it is possible to reduce the thickness in both the vertical and horizontal directions to a minimum in the retracted state, thereby ensuring both side visibility and maneuverability in narrow spaces when driving. Moreover, it is an object of the present invention to provide a method for extending and storing a supplementary jig in a wheeled crane, which allows the work of extending and storing the jig to be easily carried out even in a narrow space.

The present invention basically adopts a side-hugging storage method for a compression column type jib, and is characterized by the fact that when stored, the jib is held in a vertical position with its thickness direction facing left and right.
When folding and extending the Vc, the jib is suspended in a vertical position and rotated around an axis along the axis of the jig, thereby converting the jib to an extended position in which the thickness direction surface faces upward and downward. In addition to this, it is also characterized in that the rotation axis of the zoom point main sheep can be used as a boom point pin for supporting the jib foot, and the pin can be rotated around the axis.

Embodiments of the present invention will be described below with reference to the drawings.

Figures 1 and 2 show the jig extended state, and Figures 3 to 5
The figure shows the jib in its retracted state. 1 is a telescopic boom, 2 is a suspension rod support compression column type addition jig (hereinafter simply abbreviated as jig), and 3 is a suspension rod. In addition, here, in order to make the explanation easier to understand,
Although the telescopic game 1 is configured as a one-stage telescoping type that fits into the base end game IA, which is a fixed boom, and the distal end boom IB, which is a movable boom, the present invention is applicable to a two-stage telescoping type or a three-stage retractable type. Of course, it can also be applied to a telescoping boom. Furthermore, the left and right direction hereinafter refers to the direction seen from the driver's seat. As is well known, the jib 2 is formed into a flat frame shape with a tapered end by fixing a large number of connecting rods 2C between a pair of side rods 2a, 2b made of flat square pipes or the like. ing.

There are boom point pins 4 on both left and right sides of the tip of the boom 1, that is, the tip of the tip boom IB (boom point).
．． 5 is attached to the boom point pin 45 so as to be rotatable around the pin axis X, and when the jib is extended, the left side feet 6.7 of the jib 2 are engaged with the boom point pin 45. An explanation will be added regarding both poom point pins 4.5. FIG. 5 shows the boom point, that is, the tip of the tip boom IB. Reference numeral 8 designates a boom point sheep block, in which several zoom point main sheeps 9 and several idler sheeps 10 are each housed, and both groups are rotatably supported by rotating shafts 11 and 12. Both sheep jIY49..., 10
Among the two rotating shafts 11 and 12 supporting the main sheep group 9..., the rotating shaft 11 for supporting the main sheep group 9 is formed to be longer by a predetermined length than the length necessary for originally supporting the main sheep group, By inserting the block 81C rotatably in a state in which both left and right end portions protrude outside the sheath block 8,
Connect both ends of this rotating shaft 110 to boom point pins 4 and 5.
The VC is configured so that it can be shared as a server. With such a configuration, the material cost and assembly cost are much lower than the case where the boom points 4 and 5 are welded through the sheep block 8Vc or as a single piece of wood, completely unrelated to the sheep rotation axis. Not only is it easy to use, but it also has excellent pin strength. 13 is a circumferential groove to prevent the rotating shaft 11 from being removed;
14 is the same pin. Also, both sides boom point pin 4
, 5VC is the bottle hole 4a for connection with the jib foot 6.7
, 5a are provided.

In addition, it is a 15-keel boom extension sheep, and is stowed at the boom tip (the boom tip one step below the tip boom in the case of a multi-stage boom) in a vertical position inclined at a predetermined angle, and the jib 2 is In order to avoid interference with the sheep 15 in the stored state, it is configured to be stored in a vertical position inclined at an angle equal to or larger than the inclination angle of the sheep 15 (11 (for example, 15 degrees). However, the illustration of the boom extension sheep 15 and the display of the inclination of the jib 2 in the retracted state are omitted except in FIGS. 5 and 10.

The jib foot 6.7 of the left side jib foot 6 is also formed into a fork shape. The right side jib foot 7 is formed into a stepped fork shape with one side shorter than the other. Both of these jib feet 6.7 are separate from the jib body, that is, the side rods 2a- and 2b. The right side jib foot 7 is fixed to the base end of the right side rod 2b.On the other hand, the left side jib foot 6 integrally has a male threaded portion 6a as shown in FIG. is screwed into the socket 6bVC fixed to the inside of the proximal end of the left side rod 2a of the jig.In this way,
The left side jib foot 6 is attached to the base end of the jig left side rod 2a so as to be screwed around the side rod axis y. Note that the right jib foot 7 has a pin hole 1 corresponding to the pin hole 5a of the right boom point pin 5 at one location.
7. There are two parts on the left side jib foot 6: the tip and the middle.
Bottle holes 16a and 16b corresponding to the pin hole 4aVC of the left boom point pin 4 are provided, among which the middle bottle hole 16b is provided.
is formed in the shape of a long hole.

As shown in FIGS. 3 to 5, when the jib 2 is stored, it is folded in a vertical position with its thickness direction facing left and right along the left side of the base end boom IA. 2, the proximal end game I at two places, the distal end and the proximal end.
I'm trying to fix it at A. That is, first, to explain the jib tip side, Figs. 1 to 4, and Fig. 7
．． As shown in Fig. 8, an engagement pin 18 is provided in the shape of a protrusion along the jig axis direction at the tip of the jib 2, and on the left side of the base end of the base end boom IA, both sides in the boom axis direction are provided. An open box-shaped bracket 19 is provided in a protruding manner, and the engaging pin 18 is configured to be engaged with this bracket 19 from the front. This bracket 19 and engagement pin 111/m are
Pin holes 19a and L8 that match in the vertical direction when the jib is stored
a, and insert the tip fixing pin 2 into the pin holes 19a and 18a.
The engaging pin 18 can be fixed to the bracket 19 by inserting the screw. On the other hand, the fixation of the base end of the jib is
As shown in the diagram, the base end zoom LA and the jig left scolding rod 2
This is done by connecting brackets 21 and 22 with bottle holes protruding from the side surface of a to each other with a base end fixing pin 23.

A jig guide 24 is formed by fixing a pair of guide frames 24a, 24a in parallel to the left side surface near the tip of the base end boom LA, as shown in FIGS. 9 and 10. The jig guide 24 has a horizontal groove portion 24b extending along the boom axis direction and an inclined groove portion 24c with a downwardly downward slope. Reference numeral 25 designates a guide pin as a jig-side engaging body that engages with the jig guide 24, and is protruded from the right side rod 2bVc.

Reference numeral 26.26 denotes a suspension rod mounting seat, which is thrust toward the left and right rods 2a, 2blC4 at the tip of the jib 2, and one end of the suspension rods 3, 3 is mounted on this mounting seat 26.26 when the jib is used or stored. 261C bin 27
．． I try to stop it at 27. In addition, in order to store the suspension rod 3.3 in the jib 2 when storing the jib, L-shaped rod receivers 28 are provided on both the left and right sides of the base end of the jib 20.
, 28 and rod holders 29 and 29 are provided on both left and right sides of the intermediate portion of the jib 2, respectively. The rod holders 29 and 2'9 each include a U-shaped holder body 30 and a U-shaped holder body 30, as shown in FIGS. 11 and 12, respectively.
an opening/closing link 31 that opens and closes an upper opening of the link 3;
A torsion coil spring 32 that always biases the device 1 in the direction of closing the main body.
In contrast, when the rod is stored, the opening/closing link 31IC closes the main body 30 to hold the rod 3, and when the rod is used, the link 31 is opened so that the rod 3 can be removed from the main body 30. 30a is a pin that holds the opening/closing link 31 in an open state.

Moreover, 33.33 is a handle for jig twist provided on both left and right sides of the tip of the jib 2.

Next, a method for extending and storing the jib 2 according to the present invention will be explained.

The jig 2 is in the stored state as shown in FIGS. 3 to 5.
In the extended state, the right side rod 2b is up and the left side rod 2a is down. The tip is engaged with the bracket 19 at the end and fixed with the fixing pin 20, and the bracket 21 is attached at the base end.
．． 22 with the base end fixing pin 23, the jib 2 is fixed in the stored position. Further, in this jib storage state, the guide pin 25 of the jib 2 is engaged with the horizontal groove portion 24b of the jig guide 24.

Therefore, the jig 2 is extended by the following procedure.

(b) With the crane's outriggers (not shown) extended and the aircraft stabilized, set Game 1 to all i, then go to y.
Point to the side or rear of the aircraft in a horizontal position.

(b) As shown in Fig. 13, the jig tip fixing bin 20
, and insert the pin 20 across the pin hole 4a of the left zoom point pin 4 and the intermediate pin hole 16ba of the left jib foot 6. This connects the left jib foot 6 and boom point pin 4, and the jib tip fixing pin 2
0 can be used as a jib foot pin.

e Remove the lamp base end fixing bin 23. This bottle 23 is
It will later be used as a foot bin for the right jib foot 7.

(in) As shown in Figure 14.15, turn the boom l to 80mm.
Raise the boom 1 to about 60° until the guide pin 25 comes off the jib guide 24 (about 60 cm)
Stretch it. This causes the jib 2 to rise together with the tip boom IB, and the guide pin 25 of the jib 2 to be attached to the base boom IB.
In the jib guide 24Vc of A, it enters the inclined groove part 24c from the horizontal groove part 24b and moves in the inclined groove part 24c. As a result, the jib 2 rises and rotates 11 forward around the axis X of the boom point bin 4, detaches from the base end poom IA, and assumes a vertical position.

(For mowing, lower the boom 1 to a height where the handle 33 at the tip (lower end) of the jig can be operated from the ground.

(to) Holding the handles 33 and 33, twist the jib 2 along the jig axis (vertical axis) by 255 degrees (from the state shown in Fig. 15 to the state shown in Fig. 17), and turn the jib 2 on the right side jib foot 7.
is engaged with the 71 side boom point pin 5.

In this way, since the jib 2 is twisted and set at the tip of the boom, the main hook (not disclosed) suspended from the lower part of the sheep block 8 at the tip of the boom can be easily passed over the base end of the jib 2. . Alternatively, if you lower the main hook to the ground in advance at this time, you only need to change the hanging wire of the hook, so you can pass the main hook through the base end of the jig when extending the jig, as in the case of the conventional lower holding type. You will no longer have to struggle with your work.

(g) Fix the tip of the auxiliary winding wire 35 passed through the auxiliary sheep 34 of the tip zoom IB to the tip of the jib 2, and wind the auxiliary winding wire 35 so that the jig tip is approximately 1 m above the ground. Defeat Game 1 further while holding it or extending the tip boom IB.

(After using force to lower the boom 1 to the horizontal or slightly lower position, attach the jib base end fixing pin 23 that was previously removed to the 18th
As shown in the figure, the jig foot 7 is prevented from coming off from the boom point pin 5 by being inserted between the via hole 17 of the right jig foot 7 and the via hole 5a of the right boom point pin 5. Also, in (b) above, left jib foot 6
and pin holes 16b and 4aVc of left boom point pin 4
The inserted jig tip l1lli1 part fixing pin 20 is removed once, and the same bit 20 is inserted into the tip pin hole 16aK of the jib foot 6 as shown in FIG. 19, and then replaced. In addition, when replacing the pin 2°, the pin 20 can be easily removed because the intermediate pin hole 16b of the left jib foot 6 is a long hole π. In this way, in the jig extended standby state, the left jib foot 6 and the base end and intermediate portion of the left suspension rod 3.3 are connected to the rod receiver 28.
28 and rod holder 29. Remove it from the 20th rod holder.
As shown in the figure, the base end of the rond is attached to the sheep block 8 of the tip boom IB. From this FLK, suspension rods 3, 3 are suspended between the jig 2 and the tip boom IB to support the jib 2.

Figure: Load the auxiliary winding wire 35 onto the sheep block 36 of the jib 2, and attach the auxiliary hook 37 to its tip.

In the manner described above, the extension of the jig 2 is completed.

Furthermore, the jib 2 is stored in the reverse order to the above-mentioned extension procedure. In order to describe the concave point, the boom L should be tilted horizontally or slightly downward, and the fully retracted lever should also be slightly extended (for example, 60 to 70 cm).

Next, remove the auxiliary winding wire 35 from the auxiliary hook 37 and attach its tip to the jig tip.
While supporting the suspension rod 3.3, remove it and store it in the jib 2. 2 is in a vertical position with its thickness direction facing left and right so that the rotation axis 11 of the zoom domain sheep 9... is shared as the boom point pins 4 and 5 for the zip foot 6.7, so the boom point pin 4.5 is advantageous in terms of cost and pin strength compared to the case where the pin is provided separately.

In addition, in the above embodiment, the left foot 6 of the jib 2 was configured to be rotated around the axis y by screw rotation.
A bearing structure may be adopted instead of the screw rotation structure.

Regarding the right side jib foot 7, in the above embodiment one of the three pieces was formed in a short stepped bifurcated shape, but the second
As shown in FIG. 1, it may be formed into a bifurcated shape in which one piece is extended by an inverted letter d and the whole is C-shaped. With this shape, when the jib 2 is hung in a vertical position and rotated with a twist, if the jib 2 is tilted so that the right jib foot 7 is located below the right boom point pin 5 due to the jig center of gravity, the corresponding By hooking the jib foot 7 to the right boom point pin 5, both 7 and 5 can be temporarily connected. In addition, according to the basic embodiment in which the right side jib foot 7 is formed into a bifurcated shape with different steps, the operation of engaging the foot 7 with the boom point pin 5 becomes easy;
Even if the right side jib foot 7 is formed into a bifurcated shape with the same three pieces of equal length as the left side jib foot 6, the intended purpose of the present invention can be fully achieved.

As described above, according to the present invention, even though the jig is side-held, it is possible to minimize the horizontal thickness dimension of the boom and jib in the retracted state. While ensuring side visibility, it is also easy to enter into narrow spaces, and the jib can be easily extended and stowed even in narrow spaces. In addition, since the rotation axis of the boom point main sheep is commonly used as the zoom point pin for both jib feet, costs are reduced and the strength of the pin is advantageous.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which FIG. 1 is a side view of the jib in its extended state, FIG. 2 is a plan view of the same, FIG. 3 is a side view of the jib in its retracted state, FIG. 4 is a plan view of the same, and FIG. The figure is an enlarged sectional view of the tip of the boom, Figure 6 is an enlarged perspective view of the jib foot part, Figure 7 is an enlarged view of the section shown in Figure 4, Figure 8 is a sectional view taken along the line ■-■ in Figure 7, Fig. 19 is an enlarged view of the construction part in Fig. 3, Fig. 10 is a sectional view taken along the line X-X in Fig. 9, Fig. 11 is an enlarged view of the part in Fig. - sectional view along the line;
FIG. 13(a) is a schematic side view showing a state of preparation for overhanging;
Fig. 13(b) is an enlarged view of the left side jib foot in the same state, Fig. 14 is an enlarged side view of the guide mechanism in the middle of moving the jib to the vertical position, and Fig. 15 is an enlarged view of the jib in the vertical position. A schematic side view of the hanging ridge; FIG. 16 is a schematic side view of the jib rotated approximately 165 degrees; FIG. 17 is a schematic side view of the jib rotated approximately 90 degrees; FIGS. FIG. 20 is a side view showing a state where the jib is set in the fully extended state, FIG. 21 is a side view showing a modified example of the good side jib foot. 1... Middle 16 boom, IA... Base end (fixed) boom, IB... Tip (movable) boom, 2... Jig, 3
...Suspension rod, 4.5...Boom point pin, 4a, 5a...Bin hole, 6...Jib foot rotatable around the jib axis, 16a, 16b...
Bottle hole of the same jib foot, 7... Other jib foot, 17... Bottle hole of the same jib foot, 8... Boom tip sheep block, 9... Boom point main sheep, 11... Of the same sheep Co-rotating shaft, 20.23... Pin that connects the jib foot and boom point pin, X...
・Boom point pin axis, y...Jib axis direction axis. Patent Applicant Kobe Steel Co., Ltd. Figure 7 Figure 0 Figure 9 Figure 10 Procedural Amendment (Voluntary) June 1981 Commissioner of the Patent Office Shima 1) Tono Haruki 1, Indication of the Case 1982 Patent Application No. 61987 2. Name of the invention Oil lb Type I L/-20, extension and storage method of the supplementary jib 3, Relationship with the case of the person making the amendment Patent applicant name (119) Kobe Steel, Ltd. 4. Agent Showa Year, Month, Day (Voluntary amendment) 66 Target of amendment Z Contents of amendment (1) In page 14, line 13 of the specification, the word "lower" is corrected to "lower". (2) On page 17, line 10 of the specification, it says “Turn boom 1 to 8
"near 0°" should be replaced with "nearly 80° with boom 1 extended to a certain length, for example 60cIR to 70cM".
I am corrected. (3) Figure 2 of the drawing is corrected as shown in the attached sheet. (In Figure 6 of the 41 drawing, the symbol "y" and its leader line are added so that it can be marked in red on the attached attached copy of the drawing.

Claims (1)

[Scope of Claims] 1. A telescopic boom and a suspension rond support compression column joint added to the tip of the telescopic zoom. A boom point provided on the sheep block at the tip of the telescopic game in a wheeled crane that is rotatably supported around the axis of the zoom point pin provided on both the left and right sides of the tip in a horizontal position along the left and right directions. Both left and right sides of the main sheave circumferential rotation axis extend outward from the sheep block to form the above-mentioned both-side boom point pins, and the jib feet on both the left and right sides of the supplementary jib are bifurcated so that they can be engaged with and detached from the boom point pins. At the same time, the two jibs and the boom point pin are provided with corresponding connecting pin holes, and one of the jig feet is configured so that it can be rotated around the axis in the jig axis direction, and when the jib is stored, , align the jib with the side surface of the boom in a vertical position with its thickness direction facing left and right,
When extending the jig, the jib foot, which can be rotated around the jib axis line, is engaged with the corresponding boom point pin, and the jig is rotated around the axis of the boom point pin to take a vertical position. □ In this state, twist the jib around the jib axial direction to engage the jib foot of the capacity with the game point pin on the corresponding side, and connect the point pin on both sides and the jib foot on both sides as above. By connecting pins through the connecting pin holes, the jig can be extended to the tip of the boom in a flat position.
Reverse the procedure for extending this jig and attach it to the side surface of the boom I.
C. A method for extending and storing a supplementary jib in a wheeled crane, which is characterized by being stored in a vertical position.