JPH0714558Y2 - Concrete pump boom equipment - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boom device for a concrete pump which is operated according to the situation at the driving site.

[0002]

2. Description of the Related Art Generally, in a concrete pump car, a plurality of booms are flexibly connected in multiple stages to a mast that is rotatably provided on the car, and each boom device corresponds to a working space at a driving site. The boom is stretched and bent, and its posture is appropriately changed to pump fresh concrete to the driving site.

[0003]

[Problems to be solved by the invention] However, when the working space around the driving site is narrow or complicated,
If the boom device has a low degree of freedom in the boom (usually three), it is difficult to change the boom to an optimum posture in accordance with the working space around the driving site, and the boom device does not turn smoothly, so the boom device is not effective. It may be difficult to operate the.

When the work space around the driving site is large, the boom of the boom device is easy to operate, but even if the boom of the boom device is extended, the boom length is limited due to the limitation of the total length of the concrete pump truck. Shortage,
The hose guide at the tip of the transportation pipe did not reach the driving site,
There will be restrictions on the height of the driving site where the ready-mixed concrete is pumped.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to make it possible to facilitate the operation and expand the working range according to the situation at the site where the concrete is poured. A boom device for a concrete pump car is provided.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a boom device for a concrete pump in which a connecting boom is flexibly connected to a base boom, and a connecting portion is provided at a tip end side formed by cutting the connecting boom in the middle thereof. Is provided, and the connected portion of one exchanged boom selected from two or more exchanged booms having a unique structure and shape is exchangeably connected to this connection portion.

[0007]

In the present invention, for example, when the work space around the driving site is large, a boom to be replaced which is a long boom body is selected as the boom to be replaced, and the connected portion of the boom to be replaced is It is connected to a tip-side connecting portion formed by cutting the connecting boom partway.

Further, for example, when the work space around the driving site is narrow, a bendable replaceable boom is selected as the replaceable boom, and the connected part of the replaceable boom is located in the middle of the connecting boom. It is connected to the connection portion on the tip side formed by cutting.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 is a chassis of a vehicle, and a concrete pump device 2 is mounted on the chassis 1. The concrete pump device 2 has a concrete pump 10 and a boom device 3, and the boom device 3 is provided on a rotary base 1A provided on the chassis 1 so as to be rotatable in the horizontal direction, and on the rotary base 1A. Of the pillar 4, the first boom 5 flexibly connected to the tip of the pillar 4, the second boom (base boom) 6 flexibly connected to the tip of the first boom 5, and the second boom 6. A third boom 9 in which a connecting portion including a connecting flange 8 is provided on the distal end side 7 that is flexibly connected to the distal end and is formed by cutting the middle.
And have.

Further, the concrete pump device 2 is
The concrete pump 10 has a transport pipe 10A for pumping fresh concrete, and the transport pipe 10A has a first boom 5,
A flange 10 formed along the second boom 6 and the third boom 9 so as to be bent and supported in a freely bendable manner and formed at the tip thereof.
B reaches almost the same position as the connecting flange 8. The connection flange 8 is configured to be replaceably connected to a connected portion of one exchanged boom selected from two or more exchanged booms having a unique structure and shape.

As the exchanged boom, for example, as shown in FIGS.
Will be described. First, the first exchanged boom 11 shown in FIG. 2 is composed of a long boom body, and the connected transportation pipe 12 is supported by the first exchanged boom 11 along the longitudinal direction thereof. First exchanged boom 11
A hose guide 13 is provided at the tip of the delivery hose, and a delivery hose 14 guided by the hose guide 13 is connected to the tip of the connected transport pipe 12.

The first exchanged boom 11 having the above-mentioned shape is selected, and the connection portion composed of the flange portion 11A formed at the base end thereof is attached to the connection flange 8 of the third boom 9 by bolts, nuts or the like. The connected portion, which is composed of the flange portion 12A of the connected transportation pipe 12, is connected to the flange 10B at the tip of the transportation pipe 10A via a joint.

When the first exchanged boom 11 composed of such a long boom body is selected, the third boom 9 and the first exchanged boom 11 are connected to form an integrated connection boom, Boom device 3 of concrete pump car 1
Is applied when the working space around the driving site is large or the height of the driving site is high. Therefore, for example, when there are a plurality of driving sites and their distances are large, the boom device 3 can be easily operated.

Further, even if the height of the driving site for pumping the fresh concrete is high and the boom full length is insufficient due to the limitation of the total length of the concrete pump car 1, etc.
If you use the exchanged boom 11 of
Can be driven to reach the spot. On the other hand, FIG. 3 shows a bendable second exchangeable boom 15.
The second exchanged boom 15 includes an extension boom 16 and a fourth boom 18 that is flexibly connected to the extension boom 16 via a link mechanism 17.

In the middle of the extension boom 16, the hydraulic cylinder 1
The base end 19A of 9 is provided by pin-linking, and when the hydraulic cylinder 19 is expanded and contracted, the extension boom 1 is connected via the link mechanism 17 pin-connected to the piston rod.
The base end of the fourth boom 18 is rotated relative to the tip of the sixth boom 18, and the fourth boom 18 is bent with respect to the extension boom 16.

The hose guide 1 is attached to the tip of the fourth boom 18.
8A is provided, and the connected transport pipe 20 is supported along the extension boom 16 and the fourth boom 18. A delivery hose 18B guided by the hose guide 18A is connected to the tip of the connected transport pipe 20. The connected portion composed of the flange portion 16A formed at the base end of the extension boom 16 is adapted to be connected to the connecting flange 8 of the third boom 9 by bolts, nuts, etc. The connected portion including the flange portion 20A of the connection transport pipe 20 is adapted to be coupled to the flange 10B at the tip of the transport pipe 10A via a joint.

The hydraulic cylinder 19 is connected to one end of each of a pair of pipes 21 and 21.
Connected-side couplers 22 and 22 are connected to the other ends of 21 respectively. The connected-side couplers 22 and 22 can be connected / disconnected to / from the body-side couplers 23 and 23 (shown by the chain double-dashed line in FIG. 3) provided on the third boom 9 in FIG. 1, respectively.

Therefore, the second exchanged boom 15 is replaced.
When selecting, the third boom 9 and the second exchanged boom 15 are connected to form an integrated connection boom, and the boom device 3 of the concrete pump car 1 is installed in a narrow work space around the driving site. Applies to cases and complex cases. Therefore, when the working space around the driving site is narrow or complicated, the degree of freedom of the boom of the boom device 3 increases, and the boom changes to an optimum posture in accordance with the working space around the driving site. The boom device 3 can be operated freely, and the boom device 3 can be freely operated.

According to the above construction, the exchanged booms 11 and 15 having, for example, an optimum structure and shape are selected as the exchanged booms in accordance with the situation of the raw concrete pouring site, and the boom device 3 is operated. It is possible to achieve the simplification and expansion of the work range. In this embodiment, the exchanged boom shown in FIG. 3 has one degree of freedom (one joint).
However, the degree of freedom can be set to 2 or more (a plurality of joint portions).

When the work space around the driving site is bent, the work space can be bent in accordance with the work space. Furthermore, in this embodiment,
Although the second boom 6 is used as the base boom, the first boom 5 can be used as the base boom. Further, in the present embodiment, an example in which the concrete pump device 2 is mounted on the chassis 1 has been described, but the present invention is not limited to this, and a stationary concrete pump device can also be applied.

[0021]

As described above, according to the present invention, the exchanged boom having the optimum structure and shape is selected as the exchanged boom according to the situation of the ready-mixed concrete driving site,
The boom device can be easily operated and the work range can be expanded.

[Brief description of drawings]

FIG. 1 is a side view of a boom device of a concrete pump truck according to an embodiment of the present invention.

FIG. 2 is a side view of a first exchanged boom of the boom device.

FIG. 3 is a side view of a second exchanged boom of the boom device.

[Explanation of symbols]

 2 Concrete Pump Device 3 Boom Device 6 Second Boom (Base Boom) 7 Tip Side 8 Connection Flange (Connecting Part) 9 Third Boom 11 First Replaced Boom 11A Flange Part (Connected Part) 15 Second Replaceable Boom 16A Flange (connected part)

Claims (1)

[Scope of utility model registration request] 1. A boom device for a concrete pump, comprising a base boom and a connecting boom flexibly connected to the base boom, wherein a connecting portion is provided on a tip side formed by cutting the connecting boom midway. A boom device for a concrete pump, wherein a connected portion of one exchanged boom selected from two or more exchanged booms having a unique structure and shape is exchangeably connected.