JPH04112888U - wheel crane - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent a boom rest from getting in the way when traveling with a load or a suspended load, and to enable the traveling body frame to be used as a loading platform or a temporary storage platform for a suspended load. [Configuration] The upper rotating body U is mounted on the lower traveling body L,
In the wheel crane in which the boom 2 is provided on the upper rotating body U so as to be able to raise and lower freely, the front part of the traveling body frame 1 has a
A boom rest 8 is provided so as to be movable between an operating position in which it protrudes above the traveling body frame 1 and fixes the boom 2 in a laid down position in the boom width direction, and a storage position in which it is retracted below the upper surface of the traveling body frame. It becomes.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a boomless system that fixes the boom that is laid down while traveling in the width direction of the boom. This paper relates to a wheel crane with an improved top structure.

0002

[Conventional technology]

In FIGS. 5 and 6, L is the lower traveling body, and 1 is the traveling body frame of this lower traveling body L. The upper rotating body U is rotatably mounted on this traveling body frame 1. A telescopic boom 2 consisting of a basic boom 2a and a multi-stage movable boom 2b rises and falls on a rotating body U. It is set freely. 3 is a boom hoisting cylinder, and 4 is a cabin.

0003 In such a wheel crane, the boom 2 prevents the movement of the vehicle body and At the front end of the traveling body frame 1, to prevent turning due to the slope of the road, etc. , a boom rest 5 is provided to fix the boom 2 in position in the width direction in a laid down state.

0004 The boom rests 5 are installed on both sides of the center line of the boom 2 when it is laid down. the boom 2 (basic boom 2a) between them and fix it in the width direction. The structure is as follows. 6 is a bumper attached to the front end of the vehicle frame 1 .

[0005]

[Problem that the idea aims to solve]

In conventional wheel cranes, these boom rests 5, 5 are attached to the traveling body frame. Because they are fixed to the frame 1 and are always protruding from the same frame 1, , there were the following problems.

[0006] At the work site, with the boom raised, use the front part of the traveling body frame 1 as a loading platform. There are times when you want to load materials, etc., and drive.

[0007] In addition, if the position where the load is hung and the position where it is lowered are far apart, the load may be left hanging. We carry out so-called suspended load traveling within the site. In this case, the suspended load is shaken. Travel with the suspended load placed on the traveling body frame 1 to prevent it from falling or falling. is desirable.

[0008] However, with conventional cranes, the boom rests 5, 5 often get in the way. Therefore, the traveling body frame 1 could not be used as a loading platform or a temporary storage platform for suspended loads. . For this reason, the above-mentioned loaded travel cannot be carried out, and suspended load travel is unstable due to the load being suspended in the air. I could only do it in such a situation.

[0009] In addition, when traveling with a load or a suspended load, do not use the boom rest 5.5 or more. It is possible to stack rootstocks at a height and place a load on top of them, but the preparation, installation, and Each removal operation is very troublesome, and it is not practical because it actually reduces work efficiency.

0010 Therefore, this invention was designed to prevent the boom rest from getting in the way when traveling with a load or a suspended load as described above. Don't be fooled and use the traveling body frame as a loading platform or a temporary storage platform for suspended loads. This provides a wheel crane that can.

[0011]

[Means to solve the problem]

According to the invention of claim 1, the upper rotating body is mounted on the traveling body frame of the lower traveling body, This wheel crane has a boom that can be raised and lowered on the upper revolving structure. At the front of the vehicle frame, the boom rest is located above the top surface of the vehicle frame. There is an active position where the boom protrudes from the top and is fixed in position in the width direction of the boom in a collapsed state, and a running position where the boom is It is movable between a storage position that is retracted below the top surface of the body frame. It is what it is.

0012 The invention of claim 2 is characterized in that in the structure of claim 1, the boom rest is formed in a pin shape. On the other hand, the boom is provided with a fixing hole into which the boom rest fits in when it is in a collapsed state. That's what happens.

[0013] The invention of claim 3 is the configuration of claim 1 or 2, in which the boom rest is in the operating position. The boom rest is rotatable around a horizontal axis between the installed and retracted positions. It is provided with a fixing means for fixing it in the working position.

[0014] The invention of claim 4 provides that in the configuration of claim 1 or 2, the boom rest is in the operating position. The boom rest is movable up and down between the installed and retracted positions. It is equipped with a fixing means for fixing.

[0015]

[Effect]

According to the above configuration, when traveling with a load or a suspended load, the boom rest is not in the active position. Remove the boom rest from the top of the vehicle frame by moving it to the retracted position. The frame can be used as a loading platform or a temporary storage platform for hanging loads.

[0016] Further, according to the structure of claim 2, the pin-shaped boom rest is fitted into the fixing hole of the boom. When using a conventional trestle-type boom rest that sandwiches the boom from both the left and right sides, The paint on the side of the boom peels off due to contact with the boom rest, causing rust. This eliminates the problem of inviting.

[0017] In addition, the structure is simple and compact, and the boom rest is lightweight. It also makes it easier to change the position.

[0018]

【Example】

An embodiment of the present invention will be described with reference to FIGS. 1 to 4.

[0019] In each figure, parts that are the same as those in Figures 5 and 6 are designated with the same reference numerals, and their duplications are The explanation will be omitted.

[0020] First embodiment (see Figures 1 to 3) A pin-shaped boom rest is attached to the front end surface of the traveling body frame 1 via brackets 7, 7. 8 is provided.

[0021] This boom rest 8 has a horizontal axis 9 whose lower end extends in the left and right direction with respect to the brackets 7, 7. It is pivoted at The operating position protrudes above the upper surface of the traveling body frame 1 in the upright state, and the virtual position shown in FIG. As shown in the line and Figure 3, it lies down on the bumper 6 and is lower than the top surface of the frame. It can be rotated up and down between the retracted and stored position.

[0022] Also, the boom rest 8 and bracket 7 have pins that match at the above operating position. A hole (not particularly marked) is provided, and the fixing pin 1 is inserted across both pin holes. 0 is inserted, the boom rest 8 is fixed in the working position.

[0023] On the other hand, the boom 2 includes a bracket provided with a fixing hole 11 at the tip of the basic boom 2a. The upper end of the boom rest 8 is fixed when the rest 12 is fixed and the boom is in the collapsed state when the crane is traveling. The portion 8a fits into the fixing hole 11 of this bracket 12 from below. This results in The boom 2 is fixed in position in the width direction to prevent unexpected turning while traveling.

[0024] Note that the boom rest 8 and bracket 12 are each viewed from the cabin 4 side. The traveling body frame 1 and the basic It is attached to the boom 2a (outer surface of the right slope). By doing this, the above fixing hole 11 The fit status of the boom rest 8 can be visually checked from inside the cabin 4, so the The position of the boom 2 can be easily adjusted, and the boom fixing action can be performed reliably.

[0025] On the other hand, since the boom 2 is held in a laid down state by the boom hoisting cylinder 3, The boom rest 8 does not need to support the boom load, and only needs to be fitted into the fixing hole 11. There are enough things.

[0026] According to the above configuration, the boom rest 8 can be attached to the upper surface of the traveling body frame 1 as needed. Since it can be stored in a retracted position downwards, it can be stored on the traveling body frame 1 on site. When traveling with a load loaded with materials, etc., or when traveling on the same platform with a load W suspended as shown in Figure 3. This boom rest 8 may get in the way when traveling with a suspended load temporarily placed on the frame 1. Instead, the entire front part of the traveling body frame 1 is used as a loading platform or a temporary storage platform for suspended loads. can do.

[0027] Also, attach the pin-shaped boom rest 8 to the fixing hole 11 of the bracket 12 on the boom 2 side. Since the configuration is such that the boom 2 is fixed by being fitted, the boom 2 can be moved to the left as shown in Figures 5 and 6. The boom rest 5, 5, which is a conventional frame type that is inserted from both sides of the right side, is used. The paint on the side of the boom may peel off due to contact with the boom rests 5, 5, causing rust. This eliminates the problem of

[0028] In addition, because it uses a simple pin system, the structure is simple and compact, and the boom lever Since the striker 8 is lightweight, its position change operation becomes easy.

[0029] Second embodiment (see Figure 4) Only the differences from the first embodiment will be explained.

[0030] In the first embodiment, the boom rest 8 moves up and down between the operating position and the retracted position. On the other hand, in the second embodiment, the pin-shaped boom rest 8 remains in the vertical position at the operating position. and a retracted position below the top surface of the traveling body frame 1. It is configured to

[0031] That is, the boom rest 8 is a cylindrical part fixed to the front end surface of the traveling body frame 1. The fixing pin 14 moves up and down along the sleeve 13 and is detachable at the operating position. held in the same position.

[0032] In addition, below the boom rest 8, an escape hole 15 is provided in the bumper 6, and a traveling body Each arm 1 is provided with a receiving plate 16, and when storing the arm, the fixing pin 14 is removed and the arm is removed. The arm rest 8 is lowered from the operating position, and the receiving plate 16 is inserted into the receiving plate 16 while passing through the escape hole 15. It is constructed so that it can be supported by

[0033] The configuration of this second embodiment also provides basically the same effects as the first embodiment. be able to.

[0034] Other examples (a) In the above embodiment, the boom rest 8 and bracket 12 are These are placed on the right side of boom 2, but if cabin 4 is installed on the left side, these should be placed on the right side of boom 2. It can be placed on the left side of the boom.

[0035] Alternatively, if there is no need to check the insertion status from inside cabin 4, (For example, if the boom lodging position when the crane is traveling is accurately determined by some kind of landmark.) (in cases where the The boom rest 8 may be fitted into the fixing hole.

[0036] (b) In the above embodiment, the pin-shaped boom rest 8 is fitted into the fixing hole on the boom side. configuration, but it can be used with two pin-shaped boom rests or a U-shaped boom rest. It is also possible to adopt a configuration in which the arm 2 is sandwiched between the left and right sides. Even in this case, boomless The basic concept of this invention is achieved by configuring the Able to achieve purpose.

[0037]

[Effect of the idea]

As mentioned above, when using the present invention, there is no boom when traveling with a load or a suspended load. By moving the boom rest from the operating position to the retracted position, the boom rest can be The frame can be removed from the top of the frame and used as a loading platform or a temporary stand for suspended loads. I can do that. In other words, it is possible to carry out loading and lifting operations, which were previously impossible in many cases. It is possible to carry out safe suspended load traveling by temporarily placing the load on the traveling body frame. Become.

[0038] Further, according to the invention of claim 2, a pin-shaped boom rest is fitted into a fixing hole of the boom. When using a conventional trestle-type boom rest that sandwiches the boom from both the left and right sides, The paint on the side of the boom peels off due to contact with the boom rest, causing rust. This eliminates the problem of inviting.

[0039] In addition, the structure is simple and compact, and the boom rest is lightweight. It also makes it easier to change the position.

[Brief explanation of drawings]

FIG. 1 is an end view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG. 1;

FIG. 3 is an overall side view of the wheel crane according to the same embodiment.

FIG. 4 is a diagram corresponding to FIG. 2 showing a second embodiment of the present invention.

FIG. 5 is an overall side view of a conventional wheel crane.

6 is an end view taken along the line VI-VI in FIG. 5. FIG.

[Explanation of symbols]

L Lower traveling body U Upper revolving body 1 Traveling body frame 2 Boom 8 Boom rest 9 Horizontal shafts 10, 14 that serve as the center of rotation of the boom rest Pin (fixing means) for fixing the boom rest in the operating position 12 Bracket 11 on the boom side Fixing hole of the same bracket

Claims (4)

[Scope of utility model registration request] Claim 1: A wheel crane in which an upper rotating body is mounted on a traveling body frame of a lower traveling body, and a boom is provided on the upper rotating body so that it can be raised and lowered, wherein a boom rest is provided at the front part of the traveling body frame. , provided movably between an operating position in which the boom is protruded above the upper surface of the traveling body frame and fixed in position in the boom width direction in a laid down state, and a storage position in which it is retracted below the upper surface of the traveling body frame. A wheel crane characterized by: 2. The wheel crane according to claim 1, wherein the boom rest is formed into a pin shape, and the boom is provided with a fixing hole into which the boom rest is fitted in a lying state. crane. 3. The wheel crane according to claim 1 or 2, wherein the boom rest is rotatably provided around a horizontal axis between an operating position and a storage position, and a fixing means for fixing the boom rest at the operating position. A wheel crane characterized by comprising: 4. The wheel crane according to claim 1 or 2, wherein the boom rest is movable up and down between an operating position and a storage position, and is provided with a fixing means for fixing the boom rest at the operating position. A wheel crane characterized by: