JPH10101294A - Jib storing device for wheel crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure agreeable traveling view from an operation room by forming a tip supporting means with a jib extension storing winch for suspending a jib by a jib extension storing wire coupled with the jib and a pushing down means contacted with the jib and pushing the jib downward. SOLUTION: A jib head 73 is mounted at a tip side of a jib 72 and a jib extension storing wire 10 wound around a jib extension storing winch 7 mounted at side surface of a center part of a boom 59 is coupled adjacent the jib head 73 for detaching. A jib extension storing wire 10 reaches a tip side of the jib 72 through a jib extension storing wire guide part 17 and coupled adjacent the tip of the jib 72 by a jib extension storing hook and the tip side of the jib 72 is supported. Further, a pushing down means 20 is formed with a lever 24, a stopper 26 and a coil spring 27 and allows the tip part of the stopper 26 to abut the jib 72.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jib housing used for a wheel crane such as a rough terrain crane and a truck crane.
It belongs to the technical field of a jib storage device of a wheel crane that stores a jib on a side surface of a boom.

[0002]

2. Description of the Related Art Hereinafter, an example of a conventional wheel crane will be described with reference to FIG. 9 of a side view thereof. Reference numeral 51 shown in FIG. A pair of front tires 52 and rear tires 53 are provided. An engine room 56 is provided on the rear side of the lower traveling body 51. The front tire 52 and the rear tire 53 or the rear tire 53 are driven by an engine installed in the engine room 56, so that the lower traveling body 51 is driven. 51 is configured to run. Further, a pair of front outriggers 55 and rear outriggers 5 are provided before and after the lower traveling body 51 to prevent the wheel crane from overturning during crane operation.
4 are provided. On the upper part of the lower traveling body 51, an upper revolving body 57 is mounted so as to be freely rotatable. On the upper side of one side of the upper revolving body 57, an operator cab 76 having a window 77 is installed. Crane operator
The traveling operation and the crane operation of the wheel crane are performed in the cab 77. The symbol P shown in FIG. 9 is the eye point of the crane operator.

[0003] The upper swing body 57 is provided with a boom 59 which is raised and lowered with a boom foot pin 58 provided at a rear portion of the upper swing body 57 as a fulcrum. The boom 59 includes a basic boom 61 and a second stage boom 62.
, A third-stage boom 63, a fourth-stage boom 64, and a fifth-stage boom having a boom head 65, and are a multistage telescopic type. The main winding hook 70 and the auxiliary winding hook 71 are stored in the boom head 65. The main winding hook 70 is suspended and suspended by the main winding winch 66, and the auxiliary winding hook 71 is suspended and suspended by the auxiliary winding winch 67. The main winding winch 66 and the auxiliary winding winch 67 are suspended.
Is provided at the rear of the upper surface of the boom 59. A wire rope 69 (only one is shown, but actually two) drawn out from the main winding winch 66 and the auxiliary winding winch 67 is connected to the main winding hook 70 and the auxiliary winding via a sheave 68. The hook 71 is reached.

On the left side of the boom 59, a jib 72 is stored. The jib 72 has a jib foot 7
4 and a jib head 73 on the distal end side. When the jib 72 is in the extended state, the jib foot 74 is connected to the boom head 65, the jib head 73 is extended forward, and the auxiliary hook 71 is hung from the jib head 73. On the other hand, when the jib 72 is in the retracted state, the base end is directed toward the boom distal end, and the distal end is directed toward the boom proximal end. The jib 72 includes tip support means 2 for supporting the jib 72 at the tip end of the jib 72, intermediate support means 3 for rotatably supporting the jib 72 at an intermediate portion of the jib 72, and The jib 72 is supported by the boom 59 at three positions on the base end side and at the base end support means 4 for supporting the jib 72.

The intermediate support means 3 is provided with a boom 59
Of the jib 72 from the center of gravity of the jib 72.
Is provided at a position close to the front end. This is cab 7
This is to prevent the intermediate support means 3 from obstructing when the left side is viewed from the eye point P in 6. That is, when the intermediate support means 3 is moved to the tip end side of the boom, the intermediate support means 3 obstructs the crane operator's view.

[0006] In the jib storage device of the wheel crane shown in FIG.
The jib 72 is drawn to the side surface of the boom 59 by being pulled by the jib overhanging storage wire 10 wound around the jib overhanging storage winch 7 provided on the intermediate side surface of the boom 59. Such a jib storing operation is disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 5-139691. The jib overhanging storage winch 7 is also used to finely adjust the storage position of the jib 72.

[0007]

As described above, in the conventional jib storage device for a wheel crane, three points, namely, a front end, an intermediate position, and a base end, are provided so that the jib does not move when traveling with the jib stored. Support the jib. Generally speaking, in order to position three points, it is necessary to finely adjust the positions of the other two points with reference to some point. In the jib storage device of the conventional wheel crane, the jib 72 is rotatably supported by the intermediate support means 3 and is used as a reference, and the jib tip side is wound around the jib overhanging storage winch 7 due to the problem of weight balance. The position of the other two points (the distal end and the proximal end) has been finely adjusted by being pulled by the jib overhanging storage wire 10.

However, as described above, in the conventional wheel crane, in order to secure a traveling view from the cab,
The intermediate support means 3 is provided at a position closer to the base end of the jib 72 than the center of gravity of the jib 72. For this reason, the base end side of the jib tends to lower by its own weight with the jib intermediate support means as a fulcrum. Once the base end of the jib 72 has been lowered from the proper fixed position in the base support means 4, the jib 72 can be pulled by the jib overhanging storage winch 7, but cannot be pushed down. However, the jib 72 cannot be fixed by the base end support means 2.

Therefore, in order to avoid such a situation, the jib 72 is moved to the boom 59 so that the base end of the jib 72 is located above the regular fixed position in the base support means 2.
Of the jib 72 by pulling the tip end of the jib 72 little by little by the jib overhanging and storing winch 7 from that state. However, moving the jib to such a positional relationship requires some skill. In addition, when the positioning fails and the base end of the jib is lowered too much, it is necessary to perform the positioning again or to move the jib manually. Naturally, re-positioning is complicated. Also, since the weight of the jib itself is considerable, it was not easy to move the jib manually.

By the way, when the jib is extended, the pin of the base support means 4 is removed, but when the pin of the base support means 4 is removed, the jib swings in the direction away from the boom based on the position of the center of gravity of the jib. Not only is there a danger of hitting a worker (crane operator) who is performing work, etc., and there is also a problem that it is impossible to insert and remove the boom point pin due to misalignment of the jib. . Further, there is also a problem that the stored jib swings in the lateral direction of the boom during running and rattles.

In view of such circumstances, the present invention can secure a good traveling view from the driver's cab, can easily, safely and quickly store the jib, and can reduce the jib during traveling of the crane. It is an object of the present invention to provide a jib storage device for a wheel crane which can reduce rattling.

[0012]

According to the first aspect of the present invention, there is provided a jib storing apparatus for a wheel crane which solves the above-mentioned problem, and comprises a lower traveling body and a swingably mounted on the lower traveling body. An upper slewing body, a driver's cab provided in the upper slewing body, and a boom provided so as to cross a position below an eye point of the cab, which is provided on the upper revolving body so as to be able to move up and down. In a jib storage device for a wheel crane, the boom includes a boom and a jib whose tip end is directed toward a base end of the boom and is stored with the base end directed toward the tip end of the boom. A base support means for supporting the jib at the base end side of the jib, and an intermediate support means for rotatably supporting the jib at an intermediate portion of the jib closer to the tip of the jib from the center of gravity of the jib. A jib overhanging storage winch for lifting the jib by a jib overhanging storage wire connected to the jib. And a pressing means for contacting the jib and pressing the jib downward.

According to the first aspect of the present invention, the jib is supported by the intermediate support means at the middle portion of the jib closer to the tip of the jib from the center of gravity of the jib, so that the intermediate support means has a driver's view. Without obstructing the vehicle, a good traveling view from the driver's cab can be secured. Also, the tip support means is composed of a combination of a jib overhanging storage winch for lifting the jib by a jib overhanging storage wire connected to the jib, and pressing means for abutting on the jib and pushing down the jib, so that the jib tip Can be freely moved upward or downward, and the jib can be stored easily and quickly.

According to the second aspect of the present invention, the first aspect is provided.
In the jib storage device of a wheel crane described in the above, the pressing means, a lever provided so as to be able to swing vertically, a stopper provided at the tip of this lever, and a biasing body for pulling down the lever downward, It is characterized by consisting of.

In this case, not only a simple mechanism can be used, but also a special drive source is not required, so that a highly reliable and inexpensive jib storage device can be formed.

According to the third aspect of the present invention, there is provided the second aspect.
In the jib storing device for a wheel crane described in the above, the stopper is provided with a pressing groove that abuts on an upper end surface of the abutting member so as to sandwich the abutting member in the longitudinal direction of the jib provided above the jib. Characterized in that the pressing roller has a pressing roller.

[0017] Thus, it is possible to suppress rattling in the side direction of the boom on the tip side of the jib.

According to the fourth aspect of the present invention, in the first aspect,
3. The jib storage device for a wheel crane according to claim 1, wherein said base end support means is provided with an engaging portion which is detachably engaged with a locking portion provided on a side surface of said boom from below. It is.

Thus, the movement of the base end side of the jib to move away from the boom can be restricted.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a jib storage device for a wheel crane according to a first embodiment of the present invention will be described with reference to FIG. FIG. 2 of the drawing and FIG. 3 of the front view showing the pressing means.
4, a side view of the pressing means of FIG. 3, and a cross-sectional view taken along the line CC of FIG. 1 (this drawing shows the base end supporting means, and the lowermost horizontal member of the jib in FIG. 1 is omitted. This will be described with reference to FIG. In addition, these FIGS.
In the following description, components having the same functions and the same functions as those of the jib storage device of the wheel crane according to the conventional example shown in FIG.

Reference numeral 59 shown in FIG. 1 denotes a boom, and a jib 72 is stored on a side surface of the boom 59. Jib 7
A jib head 73 is provided on the distal end side of the jib. Near the jib head 73, a jib overhanging storage wire 10 wound around a jib overhanging and storing winch 7 provided on a side surface of an intermediate portion of the boom 59 is provided. Are detachably connected. Further, the jib overhanging storage wire 10 reaches the distal end side of the jib 72 via the jib overhanging storage wire guide portion 17,
It is connected to the vicinity of the tip of the jib 72 by a jib overhanging storage hook described later, and supports the tip side of the jib 72. The jib overhanging storage winch 7 and the jib overhanging storage wire 10 constitute one component of the tip support means 2.

At the distal end side of the boom 59, there is provided a base end supporting means 4 which fixes the base end side of the lower rod of the jib 72 with a front fixing pin 8. To support. An intermediate support means 3 is provided at an intermediate portion of the boom 59, and the intermediate support means 3 uses an intermediate fixing pin 9 to connect the intermediate portion of the upper rod of the jib 72 to the intermediate support means 3.
Is used as a fulcrum to support the jib 72 in a rotatable state. By supporting the upper and lower rods of the jib 72 in this manner,
The jib 72 can be supported without the jib 72 rotating about the length direction of the boom.

The center of gravity W of the jib 72 is located closer to the base end of the jib 72 from its tripod shape. As described above, the intermediate support means 3 must be provided at a position closer to the distal end side of the jib 72 than the position of the center of gravity W in order to secure a view from the cab. Therefore, this jib 72
Due to the weight of the jib 72, the jib 72 tends to rotate in the direction in which the base end of the jib 72 is lowered (the direction indicated by the arrow A in FIG. 1) with the intermediate support means 3 as the center of rotation.

Next, the first embodiment will be described with reference to FIG.
Will be described in detail. That is, the jib overhanging storage wire 10 drawn out from the jib overhanging and storing winch 7 reaches the first sheave 12 along the upper surface of the boom 59, and the first sheave 12 causes approximately 9 yards.
It is deflected by 0 ° to reach the second sheave 14 and is deflected downward by the second sheave 14. A jib overhanging storage hook 16 is attached to the end of the jib overhanging storage wire 10.
The jib overhanging storage hook 16 is detachably hooked near the tip of the jib 72. The first
The sheave 12 is rotatably attached to a jib overhanging storage bracket 11 protruding from a boom 59 via a first sheave pin 13, and the second sheave 14 is rotatably attached via a second sheave pin 15.

Further, the pressing means 20 according to this embodiment will be described in detail with reference to FIGS. That is, the stopper bracket 21 is fixed to the side surface of the jib overhanging storage bracket 11 by a pair of left and right bolts 23a and 23b and the long holes 22a and 22b so that the position of the stopper bracket 21 can be adjusted vertically. A jib guide member 28 is provided below the stopper bracket 21 so as to widen downward. On the other hand, a guide member 72a having an L-shaped cross section is provided on the upper surface of the jib 72. The guide member 72a is received while being guided by the jib guide member 28, and the position of the jib 72 in the left-right direction is determined.

An overhanging portion is formed on the right side of the stopper bracket 21, and a pair of lever brackets 22 project from the overhanging portion. A lever 24 is provided on the pair of lever brackets 22 so as to be vertically swingable about a pin 23 as an axis. The distal end of the lever 24 is bent and formed as a bent portion 25. A stopper 26 having a convex curved surface formed at the distal end is fixed to the bent portion 25 with the convex curved surface facing downward, and the jib 72 comes into contact with the distal end of the stopper 26. I have. The stopper 26 is preferably made of an elastic material.

A coil spring 27 (urging member) is stretched between the bent portion 25 of the lever 24 and the stopper bracket 21, and the lever 24 is expanded and contracted by the coil spring 27. It is configured to be pushed down (in a state shown by a two-dot chain line in FIG. 4). In the first embodiment, the lever 24, the stopper 26, and the coil spring 27 constitute the pressing unit 20. The pressing means 20 is also one of the components of the tip support means 2.

In the first embodiment, the pressing means 2
Although the coil spring 27 is used as 0, it is not limited to this. That is, an urging body such as a spring is mounted on the upper part of the guide member 72a, and the jib 7 is
2 may be configured to be pushed down. In this case, the jib 72 is prevented from being damaged. Further, a bias may be applied by using a cylinder or the like instead of the coil spring 27. Further, in the first embodiment, the stopper 26 having a chamfered tip is used, but a roller may be provided instead of the stopper. In this case, even if the positional relationship between the roller and the jib 72 shifts, the roller rotates, so that the jib 72 is not damaged.

Referring to FIG. 5, the base end supporting means 4 according to the first embodiment will be described in detail. That is, in the base support means 4 according to the first embodiment, a base support bracket 42 having a pin hole into which the front fixing pin 8 is inserted and removed is protruded from a guide plate 41 provided on a side surface of a boom 59. In addition, a base end mounting bracket 43 having a pin hole through which the front fixing pin 8 is inserted / removed is provided on the jib 72. That is, the base end side of the jib 72 is aligned with the pin hole of the base end support bracket 42 and the pin hole of the base end mounting bracket 43, and then the boom 59 is shared by the common front fixing pin 8.
It is configured to be fixed and supported on the side surface of the.

Next, the operation of the jib storage device of the wheel crane according to the first embodiment shown in FIGS. 1 to 5 will be described.
First, the jib 72 is pulled toward the side of the boom 59. The jib overhanging storage winch 7 is used for this pulling movement. That is, as shown in FIG. 1, the jib 72 is supported by the intermediate fixing means 3 by inserting the intermediate fixing pin 9 in a state where the jib 72 is pulled. In this state, the jib 72 is rotatable around the intermediate fixing means 3 in the directions of arrows A and B shown in FIG. On this occasion,
The jib 72 tends to rotate in the direction of arrow A due to its own weight. However, since the distal end portion of the jib 72 is pushed down by the pressing means 20, the base end side of the jib 72 is fixed at the regular fixed position in the base support means 4. Above.

In this state, by operating the jib overhanging storage winch 7, the front end side of the jib 72 is pulled in the upward arrow A direction, and the front fixing pin 8 of the base support means 4 is easily inserted. In this state, the front fixing pin 8 is inserted into the pin hole of the base support bracket 42 and the pin hole of the base mounting bracket 43 in this state. Thus, the jib 72 is attached to the side of the boom 59 by three.
The positioning operation for supporting the point can be easily performed only by operating the jib overhanging and storing winch 7 without relying on human power.

By the way, in the case of the first embodiment,
The pressing means 20 of the jib storage device is constituted by a lever 24 provided to be able to swing up and down, a stopper 26 provided at the tip of the lever 24, and a coil spring 27 for pulling the lever 24 downward. However, the present invention is not limited to this configuration. For example, the stopper 26 may be supported so as to be able to move up and down in the vertical direction, and may be biased downward by a spring.

Next, the jib storage device of the wheel crane according to Embodiment 2 of the present invention will be described with reference to FIG. 6 (a) of a front view of the pressing means and FIG. 6 (b) of a side view of the pressing means. The same components as those in the above embodiment and those having the same functions will be described with the same reference numerals with reference to them.
As is well understood from FIGS. 5 and 6, the stopper 26 of the pressing means 20 in the first embodiment is replaced with a pressing roller 36 described later.

More specifically, a flat contact member 72b is provided on the upper surface of the jib 72 along the longitudinal direction of the jib 72.
Is protruding. Then, on the upper end surface of the contact member 72b, the pressing member 36 is supported around the tip of the lever 24 via a horizontal roller support pin 33 so as to sandwich the contact member 72b. The pressing groove 36a having a triangular cross section is configured to abut.

Therefore, according to the jib storage device of the wheel crane according to the second embodiment, the jib 72 tends to rotate in the direction in which the base end side is lowered by its own weight, as in the first embodiment. The distal end portion of the jib 72 is pushed down via the pushing roller 36 of the pushing means 20 and the contact member 72b provided on the jib 72, so that the base end of the jib 72 is higher than the regular fixed position in the base support means 4. The jib storage device according to the second embodiment is the same as the jib storage device according to the first embodiment because it is held upward. However, in this case, the contact member 72b is fixed by the pressing groove 36a of the pressing roller 36, and the rattling of the boom 59 on the tip side of the jib 72 in the side direction is suppressed. The jib 72 is more excellent than the first embodiment in terms of suppressing the rattling.

Next, FIG. 7 of a side view showing the entire structure of the jib storing device of the wheel crane according to the third embodiment of the present invention and FIG. 8 of a sectional view taken along line DD of FIG. The same components and components having the same functions as those of the above embodiment will be described with the same reference numerals. The jib storage device of the wheel crane according to the third embodiment includes:
As is clearly understood from FIGS. 8 to 10, the third embodiment differs from the first embodiment in that the configuration of the base end support means 4 is different.

That is, in the base support means 4 of the jib storage device of the wheel crane according to the first embodiment, as described above, the base support bracket 42 protruding from the guide plate 41 provided on the side surface of the boom 59 is used. Jib 72 in the pin hole
After aligning the pin holes of the base mounting bracket 43 provided in the above, the front fixing pin 8 is shared by both pin holes to support the base end side of the jib 72.

On the other hand, in the base support means 4 of the jib storage device of the wheel crane according to the third embodiment,
On the upper side of the guide plate 41, a locking plate 41a having a long hole 41b, which is a locking portion penetrating vertically, is provided so as to protrude therefrom. A projection 43a, which is an engaging portion that is removably engaged with the elongated hole 41b, is provided to support the base end side of the jib 72 with the front fixing pin 8, and the jib is engaged with the projection 43a engaged with the elongated hole 41b. The jib 72 generated based on the position of the center of gravity W of the 72 is configured to receive a force in a direction away from the side surface of the boom 59.

Therefore, according to the jib storage device of the wheel crane according to the third embodiment, even when the front fixing pin 8 of the base support means 4 is pulled out when the jib 72 is extended, the projection is formed in the elongated hole 41b. 43a is engaged, so that the jib 72 is moved to the boom 5 based on the position of the center of gravity of the jib 72.
The jib 72 can be safely extended since it does not swing in a direction away from the jig 9 and does not hit an operator or the like performing the overhang operation. Further, as described above, since the jib 72 does not shift even if the front fixing pin 8 is pulled out, the work of inserting and removing the boom point pin 18 can be easily performed, which also contributes to shortening the time for the jib projecting operation. be able to.

[0040]

As described above, the first aspect of the present invention provides a lower traveling body, an upper revolving body rotatably mounted on the lower traveling body, and the upper revolving body. A driver's cab, a boom provided so as to cross a position below an eye point of the driver's cab, the boom being provided on the upper revolving unit so as to be able to move up and down, and a tip end side of the boom is provided on a side surface of the boom. In a jib storing device for a wheel crane, the jib is stored in a state where the jib is directed toward the base end and the base end is directed toward the front end of the boom, the jib is supported at the base end of the jib. Base support means, intermediate support means for rotatably supporting the jib at an intermediate portion of the jib closer to the tip of the jib from the center of gravity of the jib, and supporting the jib on the distal end side of the jib Tip support means and Wherein the tip support means comprises a jib overhanging storage winch for lifting the jib by a jib overhanging storage wire connected to the jib, and pressing means for abutting against the jib and pushing down the jib. It is. Therefore, according to this configuration, it is possible to secure an excellent traveling view from the driver's cab, and it is possible to achieve an extremely excellent effect that the jib can be stored easily and quickly.

According to the second aspect of the present invention, the pressing means has a lever provided so as to be capable of swinging up and down, a stopper provided at the tip of the lever, and the lever being pulled down. It consists of a biasing body.
Therefore, according to this configuration, not only can the configuration be simplified, but also a highly reliable and inexpensive jib storage device can be configured. Further, according to this configuration, since a special power source is not required, it is not necessary to provide piping and wiring to the movable part, which is a boom, and from this point, reliability can be improved and cost can be reduced. .

According to a third aspect of the present invention, in the jib storing device for a wheel crane according to the second aspect, the stopper is provided so as to sandwich a contact member provided above the jib. It is a pressing roller having a pressing groove that comes into contact with the upper end surface of the contact member. As a result, rattling in the side direction of the boom on the tip side of the jib can be suppressed, so that there is an effect that the degree of rattling of the jib during traveling of the crane is reduced.

Further, according to a fourth aspect of the present invention, in the jib storage device for a wheel crane according to the first aspect, the base support means is provided with a locking portion provided on a side surface of the boom from below. It is characterized in that an engaging portion that engages in a detachable manner is provided. Thus, the movement of the base end side of the jib to move away from the boom can be restricted. Therefore, there is no danger of hitting a worker performing the overhanging work, and the jib can be safely extended and the boom point pin can be easily inserted and removed. This can contribute to a reduction in work time.

[Brief description of the drawings]

FIG. 1 is a side view showing an entire configuration of a jib storing device of a wheel crane according to Embodiment 1 of the present invention.

FIG. 2 is an enlarged view of a jib overhanging storage wire guide section of FIG. 1;

FIG. 3 is a front view showing a pressing unit of the jib storing device of the wheel crane according to the first embodiment of the present invention.

FIG. 4 is a side view of the pressing means of FIG. 3;

FIG. 5 is a sectional view taken along line CC of FIG. 1;

6 (a) is a front view of a pressing means of a jib storing device of a wheel crane, and FIG. 6 (b) is a side view of the pressing means according to the second embodiment of the present invention.

FIG. 7 is a side view showing an entire configuration of a jib storage device of a wheel crane according to Embodiment 3 of the present invention.

FIG. 8 is a sectional view taken along line DD of FIG. 8;

FIG. 9 is a side view showing an example of a conventional wheel crane.

[Explanation of symbols]

2 ... tip support means, 3 ... intermediate support means, 4 ... base end support means, 7 ... jib overhanging storage winch, 8 ... front fixing pin, 9
... Intermediate fixing pin 10 ... Jib overhanging storage wire, 11 ... Jib overhanging storage bracket, 17 ... Jib overhanging storage wire guide section 20 ... Pressing means, 21 ... Stopper bracket, 22 ...
Lever bracket, 24 ... lever, 25 ... bent part, 2
6 stopper, 27 coil spring, 28 jib guide member 33 roller support pin, 36 pressing roller, 36a pressing groove 41 guide plate, 41a locking plate, 4
1b: long hole, 42: base end support bracket, 43: base end mounting bracket, 43a: projection 51: lower traveling body, 57: upper revolving body, 59: boom 72: jib, 72a: guide member, 72b: abutment Member, 7
6 ... cab, 77 ... window P ... eye point W ... center of gravity of Shiv

Claims (4)

[Claims] An undercarriage, an upper revolving body pivotally mounted on the lower traveling body, a cab provided on the upper revolving body, and a position below an eye point of the cab. A boom provided so as to traverse the boom, the boom being provided on the upper swing body so as to be able to move up and down; A jib storage device for a wheel crane comprising a jib stored in a state of being directed to the side, a base end supporting means for supporting the jib at a base end side of the jib, and a tip end of the jib from a center of gravity of the jib. Intermediate support means for rotatably supporting the jib at an intermediate portion of the jib closer thereto, and tip support means for supporting the jib at the tip side of the jib, wherein the tip support means is Connected to the jib A jib storage device for a wheel crane, comprising: a jib overhanging storage winch for lifting the jib by a jib overhanging storage wire, and pressing means for contacting the jib and pressing down the jib. 2. The apparatus according to claim 1, wherein the pressing means comprises a lever provided to be swingable in a vertical direction, a stopper provided at a tip of the lever, and a biasing body for pulling the lever downward. The jib storage device for a wheel crane according to claim 1. 3. The pressing roller according to claim 1, wherein the stopper is a pressing roller having a pressing groove abutting on an upper end surface of the jib so as to sandwich the abutting member provided above the jib in a longitudinal direction of the jib. The jib storage device for a wheel crane according to claim 2, wherein: 4. The wheel according to claim 1, wherein said base end supporting means is provided with an engaging portion which is detachably engaged with a locking portion provided on a side surface of said boom from below. Crane jib containment.