JPS58130885A - Method of projecting and receiving 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 additional jib that is added to the telescopic boom in a wheeled crane is a truss-type cantilever type jib with a truss structure, and a large number of connecting rods between the side rods made of a pair of square pipes, etc. 2. Suspension rod supported compression column type jib (hereinafter simply referred to as truss type jib or compression column type jib) formed in a flat shape.
There are several types, and among these, the latter compression column type jib is said to be advantageous in terms of manufacturing cost and weight. On the other hand, as methods for storing the additional jib, there are generally two types: 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 onto the side surface of the boom. In both of these storage methods, in the case of the undercarriage type, the thickness of the boom and jib in the vertical direction becomes large, so the visibility during traveling, especially the side visibility, becomes narrow. In addition, if you try to improve visibility, the overall height of the crane vehicle will increase, which will also cause problems 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, the horizontal storage method is adopted in consideration of side visibility, and the reality is that there are still problems with either of these methods, so this is not a fundamental solution.

In addition, regarding the work of extending and retracting the jib, in the above-mentioned side-holding method, the jib cannot be moved from the side to the front on a horizontal plane.
A large space must be secured on the sides to allow for rotation. In addition, with the lower holding method, it was extremely troublesome to rotate the jib from the bottom to the top by N1800 and pass the main hook between the jib feet when extending the jib.

The present invention has been made in view of the above circumstances, and it is possible to reduce the vertical and horizontal thickness to a minimum in the retracted state, thereby ensuring both side visibility and maneuverability in narrow spaces while driving. To provide a method for extending and storing a supplementary jib in a wheel-type crane by which the jib can be easily extended and stored 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 folding the jib on the lateral side of the boom in a vertical position facing either in its thickness direction or to the left and right when it is stored. Sometimes, the jib is twisted and rotated in both the horizontal and vertical positions about an axis along the axis of the jib, thereby converting the jib into an extended position with the thickness direction facing upward or downward.

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

FIGS. 1 and 2 show the jib in an extended state, and FIGS. 6 and 4 show the jib in a retracted state. 1 is Shin! boom, 2
6. 3 is a suspension rod. In order to make the explanation easier to understand, here,
An example is shown in which the telescoping boom 1 is configured as a 1' stage telescoping type consisting of one proximal boom and a distal boom 1B.
The invention is of course applicable to two-stage or six-stage telescoping booms. Furthermore, the left and right direction hereinafter refers to the direction seen from the driver's seat. As is well known, the jib 2 has a number of connecting rods 2C, also made of square pipes, fixed between a pair of side rods 2a, 2b made of flat square pipes, etc., so that the jib 2 as a whole has a narrow tip. It is formed into a flat frame shape.

The tip of boom 1, that is, the tip of tip boom 1B (
Boom point pins 4 and 5 are attached to the left and right sides of the boom point (boom point) so as to be rotatable around the pin axis 5. Note that the boom points 4 and 5 may be formed by using a single through pin, or by attaching pins on both sides to the tip of the boom. Jib foot 6 on both left and right sides
゜7 are both formed into a bifurcated shape. However, the left side jib foot 6 is formed into a fork shape in which the lengths of the three pieces forming the bifurcation are equal, and the right side jib foot 7 is formed into an uneven fork shape in which the length of the - piece is shorter than the other pieces. There is. Both of these jib feet 6.7 are formed separately from the jib body, that is, the side rods 2a, 2b, and 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 pocket 6 has a male threaded portion 6 as shown in FIG.
a, and this male threaded portion 6a is connected to the jib left side rod 2a.
It is screwed into a socket 6b fixed to the inside of the proximal end. In this way, the left side jib foot B is attached to the base end of the jib left side rod 2a so that it can be screwed around the side rod axis y). Hereinafter, this axis y will be referred to as the rotation axis of the jib foot 6. The right jib foot 7 is provided with a bottle hole 9 at one location, and the left jib foot 6 is provided with two bottle holes 8a and 8b at the tip and the middle, of which the bottle hole 8b in the middle is formed into a long hole shape. ing. There are also bottle holes 4a in the boom point pins 4 and 5 on both the left and right sides.

5a penetrates in the radial direction.

When the jib 2 is stored, the left rod 2 is attached as shown in Figures 6 and 4.
The base end boom is folded along the left side of one person in a vertical position with the right side rod 2b at the bottom and the right side rod 2b at the top. It is fixed to the proximal end boom 1A at two locations: the lower end and the base end. That is, first, to explain the tip end side of the jib, as shown in FIGS. 1 to 4, as well as FIGS. On the other hand, a box-shaped bracket 12 with an opening on the left side is provided protrudingly on the left side surface of the base end of the base end boom 1A, so that the engagement pin 11 can be engaged with this bracket 12 from the left side. It consists of The bracket 12 and the engagement pin 11 are provided with pin holes 128.11a that match in the vertical direction when the jib is stored.
The engagement pin 11 can be fixed to the bracket 12 by inserting a tip identification pin 13 into the bracket 12. On the other hand, to fix the base end of the jib, as shown in FIG. This is done by combining.

Reference numeral 17 denotes a guide drum for an overhanging wire, which is attached to the upper surface of the intermediate portion of one of the proximal booms. Note that since this guide drum 17 is used only when extending and retracting the jib 2, it may be detachably attached so that it can be removed from the boom 1A when unnecessary. Also, this drum 17
A sieve may be used instead.

Reference numeral 18.18 denotes a suspension rod mounting seat, which is provided to protrude upward from the left and right rods 2a, 2b at the tip of the jib 2, and one end of the suspension rod 6.6 is attached to this mounting seat 18.18 when the jib is used or stored. Pin 19.1 to 18
I try to stop it at 9. Also, in order to store the suspension rod 6.3 in the jib 2 when storing the jib,
L-shaped rod receivers 20.2 on both left and right sides of the base end of jib 2
0 on both the left and right sides of the middle part of the jib 2.
21 are provided for each. This rod holder 21.
2.1 includes a U-shaped holder main body 22, an opening/closing link 26 that opens and closes the upper opening of the main body 22, and a link 23 that is always directed in the main body closing direction, as shown in FIGS. 9 and 10, respectively. When the rod is stored, the opening/closing link 23 closes the main body 22 and holds the rod 3, and when the rod is in use, the link 2
6 can be opened to remove the rod 6 from the main body 22. 22a is a pin that holds the opening/closing link 24 in an open state.

Moreover, 25.25 is a handle for jib 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.

In the retracted state, the jib 2 is placed along the left side of the base end boom 1A in a vertical position with the right side rod 2b in the extended state being up and the left side rod 2a being down, as shown in Fig. 6.4. Engage the engagement pin 11 at the tip of the jib described above with the bracket 12 at the base end of the base boom 1A and fix it with the tip fixing pin 16, and fix the brackets 14 and 15 at the base end. By fixing with the pin 16, the jib 2 is fixed in the stored position. Therefore, the jib 2 is extended by the following procedure.

(a) With the crane outrigger (not shown) stretched out to stabilize the crane body, fully retract the boom 1 and point it toward the outside or rear of the crane body in a horizontal position.

(b) As shown in Fig. 11, the overhanging wire 26 is pulled out along the base end boom 1A from a manual or electric winch (not shown) mounted on the crane body, passed through the guide drum 17, and the tip is attached to the jib. Tightly attach it to the middle part of 2.

(c) Also, as shown in the figure, remove the tip fixing pin 16 from the engagement pin 11 and the bracket 12, and
6 to left side jib foot 6 and left side boom point pin 4
into the pin holes 8b and 4a.

This connects the left jib foot 6 and boom point pin 4.

) Attach the jib base end fixing pin 16 to the bracket 14°15
Remove it from the jib 2 and release the fixation of the base end of the jib 2.

This pin 16 will later be used as the 7-pin of the right jib foot 7.

(e) As shown in the edict in Figure 11 and the imaginary line in Figure 12,
Without loosening the overhanging wire 26, the jib 2 is rotated by 180 degrees around the rotational axis y of the jib foot 6 by its own weight. In this way, the jib 2 is placed in a vertical position with the vertical relationship reversed from the stored position.

(f) Raise the boom 1 to about 80 degrees, and extend the boom 1 while loosening the overhanging wire 26 until it comes off the engagement pin 11 or bracket 12 at the tip of the jib, as shown by the imaginary line in FIG.

(g) When the jib 2 is released from the boom 1 in this way, the overhanging wire 26 is loosened to allow the jib 2 to hang down in a vertical position, as shown in FIG.

(a) Next, after removing the overhanging wire 26 from the jib 2, fold down the boom 1 and grab the handle 25.2 at the tip (lower end) of the jib.
5 will be lowered to a height where it can be operated from the ground.

(25) Holding the handle 25.25, rotate the jib 2 by 90° about the axis of rotation y, as shown in FIG. 14, to engage the right jib foot 7 with the right boom point pin 5.

In this way, in order to twist the jib 2 and set it at the tip of the boom, the main hook (not shown) suspended directly below the boom tip sheave block 29 can be easily passed through the base end of the jib 2. be able to. Alternatively, if you lower the main hook underground in advance,
Since only the hanging wire of the hook needs to be changed, when the jib is extended, the main hook and
There is no need to worry about passing the jib through the base end of the jib.

(b) Fix the tip of the auxiliary winding wire 27 passed through the auxiliary sheave 28 of the tip boom 1B to the tip of the jib 2, and wind the auxiliary winding wire 27 so that the jib tip is approximately 1 m above the ground. While taking it, push down boom 1 further.

QLl After the boom 1 is laid down horizontally or slightly below, insert the jib base end fixing pin 16 that was previously removed into the pin insertion hole 10 of the right jib foot 7 as shown in FIG.
By inserting the jib foot 7 into the boom point pin 5, the jib foot 7 is prevented from coming off the boom point pin 5. In addition, in (c) above, the left jib foot 6 and the left boom point pin 4's bottle hole 8
b. Once the jib tip fixing pin 13 inserted into the jib foot 6 is removed, the pin 16 is inserted into the tip pin hole 8a of the jib foot 6 as shown in FIG. When replacing the pin 16, the intermediate pin hole 8b of the left jib foot 6 is made into a long hole, so the pin 16 can be easily removed. In this way, the left jib foot 6 and the left boom point pin 4 are brought into close contact with each other in the jib extended state.

(wo) Suspension rod 3. The proximal end and middle part of B are attached to the rod receiver 20.20 and the rod holder 21.
．． 21, and attach the base end of the rod to the sheave block 29 of the tip boom 1B as shown in FIG. Thereby, the suspension rod 3.3 is suspended between the jib 2 and the tip boom 1B to support the jib 2.

(b) The auxiliary winding wire 27 is passed through the sheave block 60 of the jib 2, and the auxiliary hook 61 is attached to the tip thereof.As described above, the extension of the jib 2 is completed.

Furthermore, the jib 2 is stored in the reverse order to the above-mentioned extension procedure. To summarize the main points, the boom 1 is tilted horizontally or slightly lower, and the length is slightly extended (for example, 60 to 700 m) rather than fully retracted.

Next, remove the auxiliary winding wire 27 from the auxiliary hook 61 and attach its tip to the tip of the jib.
With the suspension rod 6.6 supported, the suspension rod 6.6 is removed and stored in the jib 2. Then, the jib tip identification pin 13 used as the left side jib foot pin is re-inserted in the opposite direction to 00 at the time of tensioning/extension, and the jib base end fixing pin 1
6 from the right side jib foot 7. After that, by raising the boom 1 and loosening the auxiliary winding wire 27,
After rotating the jib 2 downward to hang it in a vertical position and removing the auxiliary winding wire 27, the jib 2 is rotated 900 degrees around the rotation axis y. Next, the overhanging wire 27 is connected to the 16th
After the jib 2 is set in the state shown in the figure and pulled toward the boom 1 side, the boom 1 is fully retracted to engage the engagement pin 11 at the tip of the jib with the bracket 12. Thereafter, the boom 1 is laid down horizontally, the overhanging wire 27 is wound up, and the jib 2 is rotated from the posture shown by the imaginary line in FIG. 11.12 to the posture shown by the solid line. In this state, the jib 2 is fixed in the stored state by setting the fixing pins 13 and 16 at both the tip and base ends.

In the above embodiment, the left foot 6 of the jib 2 is configured to be rotated around the axis y by screw rotation, but a bearing type rotation structure may be adopted instead of the screw rotation structure.

As described above, according to the present invention, the jib 2 is stored along the boom in a vertical position with its thickness direction facing left and right, so even though it is a horizontal storage method, the total thickness in the left and right direction due to the boom and jib is Dimensions can be kept to a minimum. Also, of course, the thickness in the vertical direction can be kept to a minimum of only the Zoboom thickness. Therefore, it is possible to simultaneously ensure side visibility while driving and maneuverability in narrow spaces.

Furthermore, when extending and retracting the jib, the jib can be rotated around the axis in the jib axis direction in both the horizontal and vertical positions, thereby changing the position from the vertical position (position when stowed) to the horizontal position (position when extended) or vice versa. Because of this, even though it is a side-hugging storage system, there is no need to secure a large lateral turning space like in the past, and the jib can be easily extended and stored even in a narrow space. In addition, unlike the conventional lower-hugging retractable type, when extending the jib, there is no need for the troublesome operation of passing the main hook through the base end of the jib, which simplifies the jib extending operation. Regarding the right side jibufukuto 7, in the above embodiment one of the three pieces was formed into a bifurcated shape with short steps, but as shown in FIG. It may be formed into a bifurcated shape. 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 jib center of gravity, the corresponding By hooking the jibuf/y door to the right boom point pin 5, both parts 7.5 can be temporarily connected. In addition, according to the basic embodiment in which the right jib foot 7 is formed into a bifurcated shape with different steps, the engagement operation of the foot 7 with the boom point pin 5 is easy, but the right jib foot 7 and the left jib foot 6 have three equal parts. Even when it is formed into a long bifurcated shape, the intended purpose of the present invention can be fully achieved.

[Brief explanation of the drawing]

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. 6 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 perspective view of the jib foot part, Fig. 6 is an enlarged view of part A of Fig. 4, and Fig. 7 is an enlarged perspective view of the jib foot part.
Figure 8 is an enlarged sectional view taken along the line ■-■ in Figure 4, Figure 9 is an enlarged view of the construction section in Figure 4, and Figure 10 is taken along the line X-X in Figure 9. 11 is a schematic side view showing the jib extension preparation state, and FIG. 12 is a sectional view taken along the
An enlarged sectional view along the store line, Figure 16 shows the jib at 180°.
A schematic side view of the jib in a state where it is rotated and suspended in a vertical position, Fig. 14 is a schematic side view of the jib in a state where it is further rotated, and Figs. 15 and 16 are a schematic side view of the jib in a state where the jib is rotated and hung in a vertical position. FIG. 17 is a schematic side view showing the fully extended state, and FIG. 18 is a side view showing a modified example of the right jib foot. 1... Telescopic boom, 2... Jib, 6... Suspension rod, 4, 5... Boom point pin, 6,
7...Jib foot, X...Boom point axis, y
...Jib axial direction axis. Patent Applicant: Kobe Steel, Ltd. Procedural Amendment (Voluntary) June 2, 1980 Director General of the Japan Patent Office Shima 1) Haruki Tono1, Indication of the Case 1982 Patent Application No. 113512 Name of the Invention Oiya Equation 7k>4. :Oke 611
ff feet. Jib extension and storage method 3, relationship with the case of the person making the amendment Patent applicant name (119) Kobe Steel, Ltd. 4, agent Showa year, month, day (Spontaneous supplementary iE,) 6,
The "Detailed Description of the Invention" column and drawings of the specification to be amended. (1) Specification, page 8, line 5, Vcl' - left side cal 7F
``lr]'' was corrected to ``Both sides in the axial direction of the boom opened.'' (2) In the 6th and 7th lines of page 8 of the specification, the phrase "from the left side" is corrected to "from the front." (3) In the 14th line of page 8 of the specification, "Jig left rod 2a" is corrected to ``Jib connecting rod 2cj.'' (4) In the 2nd line of page 12 of the specification, "Opening/closing link 24"
" has been corrected to read "Opening/closing link 23." (5) On page 12 of the specification, lines 9 to 11, the statement "Then, lower the tip of the jib." should be corrected as follows. ``Next, fold down the boom L and use the handle 2 on the tip (lower end) of the jig.
5.25 will be lowered to a height where it can be operated from the ground. Note that the overhanging wire 26 may be removed from the jib 2 at this stage if possible, but it is usually removed after the jig is stretched out. ” (6) In the 18th line of page 12 of the Meiji Tenjo, the words “immediately below” are corrected to “below”. (7) On page 12, line 19 of the specification, the word "cross" is corrected to "dodge." (8) In the first line of page 13 of the specification, "underground" is corrected to "above ground." (9) In the 9th line of page 13 of the specification, the phrase "Further tilt." is corrected to "Further tilt. Or, while extending the tip boom IB, further tilt the boom 1." 1.10) On page 13, line 13 of the specification, "pin insertion hole 10j" is corrected to "pin insertion hole 9." (11) In the 8th line of page 15 of the specification, the phrase ``by loosening'' was replaced with ``by loosening (or by extending the tip boom IB by 2 mm in advance and shrinking the tip boom IB). )” is corrected. 02) In the 12th line of page 15 of the specification, the phrase ``Set in the state shown in FIG. 13'' is corrected to ``Wrap the overhanging wire 27.'' 03) In the drawings, correct the passages of Fig. 4 and Fig. 1θ on separate sheets. 55F

Claims (1)

[Claims] 1. Equipped with a telescoping boom and a suspension rod-supported compression column-type replenishment jib that is attached to the tip of the boom, and when the jib is extended, the jib foot on both left and right sides is in a flat position, and the jib foot is placed horizontally along the left and right sides of the boom tip. In a wheeled crane that is supported rotatably around the pin axis by a boom point pin provided in a vertical position, the jib feet on both the left and right sides of the supplementary jib are bifurcated so that they can be engaged and detached from the boom point pins on both sides. The jib foot is configured to be rotatable around an axis along the jib axis direction, and when the jib is stored, the jib is attached to the side surface of the boom in a vertical position with its thickness direction facing left and right. and when extending the jib, one jib foot, which is configured to be rotatable around an axis along the jig axis direction, is engaged and connected to the boom point pin while the jib is in a flat state on the boom.
After connecting the overhanging wire pulled out along the boom from the crane body to the jib, the jib is rotated 181:P around the rotational axis of the rotatable jib put without loosening the overhanging wire, and the above-mentioned storage is performed. The jib is placed in a vertical position with the vertical relationship reversed, and then the jib is rotated around the axis of the boom point pin to take a vertical position. Rotate 90 degrees and engage the other jib foot with the other boom point pin. From this point, extend the jib to the top of the boom in a flat position, and reverse the way it was extended.
A method for extending and storing a jib in a wheeled crane, characterized in that the jib is stored in a vertical position on the lateral side of the boom in accordance with steps .