JPH0712544Y2 - Boom device for concrete pump equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a boom device of a concrete pump device, and more particularly to a device in which a delivery hose guided by a hose guide can be stored.

[Conventional technology]

Generally, in concrete pumping equipment, a transport pipe that pumps fresh concrete to a concrete pouring place on a construction site is supported by a bendable boom device, and a delivery hose that discharges raw concrete is connected to the tip of the transport pipe. The delivery hose is guided and supported by a hose guide provided on the tip side of the front boom of the boom device.

In particular, in the case of a concrete pump vehicle that is configured by mounting the concrete pump device on the chassis of the vehicle, there is a legal restriction on the total length, so when storing the boom device, it must be stored within the total length of the concrete pump vehicle. On the other hand, there is a demand at the work site to make each boom constituting the boom device longer so as to secure a large working range of the boom device.

Therefore, in order to meet the above-mentioned conflicting requirements, for example, a telescopic boom is fitted to the tip side of the front boom, and a hose guide is integrally provided on the telescopic boom.
Japanese Patent Laid-Open No. 55-161727 proposes that the hose guide for guiding the delivery hose is configured to be movable and the position thereof is changed between use and storage.

[Problems to be solved by the device]

When using such a boom device, in order to position the hose guide in the forward direction, the delivery hose is set to be long by the moving amount of the hose guide, and when the hose guide is moved and positioned in the forward direction, The hanging tip of the guided delivery hose is set at a position suitable for placing ready-mixed concrete.

However, when the boom device was retracted, the delivery hose remained behind the hose guide by the amount that the hose guide moved to the rear, and the tip of the delivery hose drooped downward from the position of the tip of the hose guide when the boom device was used. I will end up. Therefore, the delivery hose may vibrate and collide with other parts when the concrete pump truck is running, for example, and may damage them, or in extreme cases, the tip of the delivery hose may reach the ground and be damaged.

Here, the delivery hose uses a rubber hose to ensure flexibility, and since it is used at the tip of the boom, measures against crushing due to the weight of green concrete and the action of the hose's own weight, and pressure feeding pressure measures are taken. Need to give,
A reinforcing layer such as a steel cord is formed. In addition, a super wear material is used to take measures against internal wear. Therefore, the delivery hose is heavy and difficult to bend. Further, it is more expensive than metal pipes such as steel pipes.

Therefore, the delivery hose where the telescopic boom reciprocates is composed of, for example, a steel pipe formed by extending a transportation pipe, and a delivery hose made of a flexible hose is detachably connected to the connection end of this steel pipe. However, every time the boom device is retracted, if you remove the delivery hose from the connection end of the steel pipe, it will be self-supporting due to its reaction force and will fit in the prescribed storage space, and the above-mentioned problem of sagging can be solved, but the delivery hose is It is heavy and difficult to bend, which makes it difficult to connect the delivery hose that was removed to the steel pipe.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to remove a hose guide when the hose guide is in a use position when the hose guide is configured to be reciprocable along the longitudinal direction of the tip boom. A boom device for a concrete pump device capable of easily connecting the delivery hose to a steel pipe.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides a flexible structure for discharging ready-mixed concrete, which is detachably connected to a connecting end portion of a rigid straight pipe extending from a transportation pipe provided along a front boom. A delivery hose having a hose, a sliding member reciprocally provided along the longitudinal direction on the tip side of the front boom, and a sliding hose that is supported by the sliding member and guides the delivery hose to bend. The hose guide, a part of which is fixed so as to hold the delivery hose so that it can be self-supporting when detached, the sheave attached to the hose guide, and the sliding member or one end connected to the front boom via the sheave. The other end of the flexible hose is connected to the proximal end of the delivery hose.

[Action]

In the present invention, when the boom device is retracted, the hose guide is moved and positioned in a direction opposite to the tip side of the front boom. At this time, the delivery hose is separated from the straight pipe,
It is self-supporting from the part fixed to the hose guide due to its straightening nature.

On the other hand, when attempting to use the boom device, first, when the hose guide is moved and positioned together with the sliding member in the direction toward the tip side of the tip boom, the flexible hose is attached to the base end side of the delivery hose in an independent state. The other end of the strip is pulled.
As a result, the distance of the sheave in the flexible linear member to the base end side of the delivery hose becomes shorter. That is, the base end of the delivery hose is pulled through the sheave of the hose guide so as to approach the front boom, and the delivery hose bends.

Then, the proximal end side of the delivery hose in the bent state and the connecting end portion of the straight pipe are close to each other, and they are coupled.

〔Example〕

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

In FIGS. 1 and 2, a concrete pump device 1 mounted on a chassis of a vehicle (not shown) has a transport pipe 2 for pumping ready-mixed concrete, and the transport pipe 2 extends along a boom device 3 mounted on the chassis. It is piped and supported. The boom device 3 includes a first boom 4a, a second boom 4b,
The front boom 4c is flexibly connected to the front boom 4c, and only the front boom 4c is shown in FIG.

As shown in FIGS. 3 and 4, a support portion 5 having a rectangular cross section and a predetermined length is integrally formed on the tip side of the front boom 4c. The position of the free end of the support part 5 is almost the same as the position of the bent parts of the first boom 4a and the second boom 4b when the booms 4a, 4b, 4c are bent and stored on the chassis of the vehicle. Matched and set to a length that falls within the legally regulated length of the vehicle. Further, a first stopper 5A is provided in the middle of the support portion 5, and a second stopper 5A is provided at the tip thereof.
A stopper 5B is provided.

A short tube member 6 having a square cross section is provided on the support portion 5 so as to surround the support portion 5 from the outside and reciprocate freely. The length of the short tubular member 6 is 1 / N of the sliding distance in the length direction of the supporting portion 5.
(N = 2 or more) or less.

The tip of the rod 4e of the hydraulic cylinder 4d attached to the front boom 4c is connected to the short cylinder member 6 via the bracket 6a. By expanding and contracting the rod 4e of the hydraulic cylinder 4d, the short cylinder member 6 reciprocates along the axial direction of the support portion 5.

Furthermore, the hose guide supporting tubular member 8 is fixedly attached to the short tubular member 6 via the support plates 7A and 7B. It is in parallel position with a distance of. A ring-shaped hose guide mounting flange 9 is fixedly provided at the end of the hose guide supporting tubular member 8, and a hose guide 10 (shown in FIG. 1) is attached to the hose guide mounting flange 9. The hose guide supporting tubular member 8 is mounted so that it can be rotated around the axis and fixed.

A member in which the hose guide supporting tubular member 8 is integrated with the short tubular member 6 constitutes a sliding member 11.

As shown in FIG. 1, the guide portion 10 is formed into a circular arc shape when viewed from the side by a large number of thin pipes 10A as is well known in the related art, and its cross section is such that the delivery hose 12 is accommodated and guided. .

The delivery hose 12 is composed of a flexible hose and discharges the fresh concrete that is pumped from a concrete pump (not shown). The delivery hose 12 has a pipe joint 2a at a connection end 14 at one end of a steel pipe (straight pipe) 13. The other end of the steel pipe is connected to the tip of the transport pipe 2 through the pipe joint 2b.
It is detachably connected via. Steel pipe 13
The hose guide supporting tubular member 8 is inserted, and the delivery hose 12 is guided along the hose guide 10 and bent into an arc shape, and the tip thereof hangs down. The middle of the delivery hose 12 is fixed to the hose guide 10 via a metal fitting 15.

Further, a rotatable first sheave 16 is fixedly attached to the lower surface of the tip boom 4c, and a fixable second sheave 17 is fixedly attached to the column member 10c of the hose guide 10. ing.

The wire (flexible linear member) 18 has one end 18A.
Is connected to the lower surface of the short tubular member 6, is wound around the first sheave 16 and folded back, is further wound around the second sheave 17 and is bent, and the other end 18B is connected to the proximal end side 12A of the delivery hose 12. There is.

When the boom device 3 is retracted, the hydraulic cylinder 4d
By reducing the rod 4e of the front boom 4c, the short tubular member 6 is moved to the root portion 5D in the direction opposite to the tip 5C of the support portion 5 and is positioned on the support portion 5 of the front boom 4c (first (Indicated by the chain double-dashed line in the figure). Therefore, the hose guide 10 is located at the root portion 5D of the support portion 5 of the front boom 4c, and the total length of the boom device 3 is shortened.

At this time, since the delivery hose 12 and the steel pipe 13 are separated by removing the pipe joint 2a in advance, the delivery hose 12 has a property of trying to be straightened by itself, so that the short tube member 6 moves. The base end side gradually rises, stands up from the fixed portion 10B of the hose guide 10, and its base end side 12A faces upward.

On the other hand, when the boom device 3 is to be used, the rod 4e of the hydraulic cylinder 4d is extended so that the short cylinder member 6 moves the tip 5C (the (Shown in FIG. 3). Therefore,
The hose guide 10 integrated with the short tubular member 6 of the sliding member 11 is located at the tip 5C of the support portion 5 (shown by the solid line in FIG. 1), and the working range of the boom device 3 is expanded by the distance moved. .

Then, when the hose guide 10 is moved and positioned together with the sliding member 11 in the direction toward the tip end side of the front boom 4c, the base end side 12A of the delivery hose 12 in the self-supporting state is moved to the other end 1 of the wire 18.
Pulled at 8. This allows the second wire 18
The distance from the sheave 17 to the base end side 12A of the delivery hose 12 becomes shorter. That is, the base end side 12A of the delivery hose 12 passes through the second sheave 17 of the hose guide 10 and the front boom 4c.
The delivery hose 12 bends as it is pulled toward.

Then, the proximal end side of the delivery hose 12 in this bent state
Since the connecting end 14 of 12A and the steel pipe 13 are close to each other,
These are connected by the pipe joint 2a.

According to the above configuration, when the boom device 3 is stored,
The steel pipe 13 and the delivery hose 12 are separated so that the delivery hose 12 is in a self-supporting state, and it is possible to prevent the delivery hose 12 from hanging down.

On the other hand, when the boom device 3 is used, by moving the sliding member 11 together with the hose guide 10, the one end 18A of the wire 18 is pulled toward the sliding member 11 toward the tip side of the front boom 4c, and the delivery hose 12 is in an independent state. The proximal side 12A of the wire 18 is pulled by the other end 18B of the wire 18. As a result, the distance from the second sheave 17 in the wire 18 to the base end side 12A of the delivery hose 12 is shortened, and the base end side 12A of the delivery hose 12 in an independent state is automatically bent in the direction of the front boom 4c. Delivery hose 12 facilitates connecting end of steel pipe 13
Can be connected with 14. That is, the bending work of the delivery hose 12 can be automatically performed without manual labor. In this case, the delivery hose 12 and the connecting end portion 14 of the steel pipe 13 can be located on the coaxial line depending on the length of the wire, and even if the delivery hose 12 is not located on the coaxial line, it was in a close position. Easy delivery hose
The 12 can be easily fitted to the connecting end 14 of the steel pipe 13.

In the present embodiment, the wire 18 is given as an example of the flexible linear member, but the flexible linear member is not limited to this and may be a rope, for example.

Further, in the present embodiment, on the support portion 5 formed on the tip side of the front boom 4c, the front boom 4c is inserted via the sliding member 11.
The structure is such that the hose guide 10 separate from the hose guide 10 can be reciprocated, but the structure is not limited to such a structure. It is also possible to attach a hose guide to the constituting inner cylinder so that the hose guide can reciprocate.

Further, although the one end 18A of the wire 18 is connected to the sliding member 11 in the present embodiment, the one end 18A of the wire 18 may be connected to the front boom 4c. In this case, when the boom device 3 is to be used, the hose guide 10 and the sliding member 11 move toward the tip side of the tip boom 4c, so that the delivery is in an independent state through the movement of the second sheave 17. The proximal end side 12A of the hose 12 is pulled by the other end 18B of the wire 18.

Further, in the present embodiment, the wire 18 has one end 18
A is connected to the lower surface of the short tubular member 6, is folded back at the first sheave 16, is further bent at the second sheave 17, and the other end 18B
Is fixed to the proximal end side 12A of the delivery hose 12,
The first sheave 16 is omitted, and one end 18A of the wire 18 is attached to the tip boom 4
Alternatively, the other end 18B can be directly connected to c, bent at the second sheave 17, and connected to the base end side 12 of the delivery hose 12.

Further, the steel pipe 13 is provided separately from the transportation pipe 2, but the steel pipe 13 can be omitted by extending the transportation pipe 2 and the transportation pipe 2 itself can be a straight pipe.

[Effect of device]

As described above, according to the present invention, when the boom device is retracted, the delivery pipe is separated from the delivery hose so that the delivery hose is in an independent state, and when the boom device is used, it slides together with the hose guide. By the movement of the member in the front end direction of the front boom, the base end side of the delivery hose in a self-supporting state is pulled by the other end of the flexible linear member. This shortens the distance from the sheave in the flexible linear member to the base end side of the delivery hose, and automatically bends the base end side of the delivery hose in an independent state toward the front boom. Since it can be easily brought to the connecting end of the straight pipe, the connection between the straight pipe and the delivery hose can be facilitated. That is, there is an effect that the bending work of the delivery hose can be automatically performed without manual labor.

[Brief description of drawings]

FIG. 1 is a side view showing an essential part of a boom device of a concrete pump device according to an embodiment of the present invention, FIG. 2 is a side view showing the entire boom device, and FIG. 3 is a front boom part of FIG. 4 is a side view and FIG. 4 is a sectional view taken along the line II-II in FIG. [Explanation of symbols of main parts] 1 …… Concrete pump device 3 …… Boom device 4c …… Front boom 10 …… Hose guide 11 …… Sliding member 12 …… Delivery hose 12A …… Base end side 13… … Steel pipe (straight pipe) 14 …… Connection end 17 …… Second sheave 18 …… Wire 18A …… One end 18B …… The other end.

Claims (1)

[Scope of utility model registration request] 1. A flexible delivery hose for discharging fresh concrete, which is detachably connected to a connecting end portion of a rigid straight pipe extending from a transportation pipe provided along a front boom, and a tip. A sliding member provided on the tip side of the boom part so as to reciprocate along its longitudinal direction, and supported by this sliding member,
A hose guide that guides and supports the delivery hose so that it bends, and a part of it is fixed to hold the delivery hose so that it can be self-supporting when detached, a sheave attached to the hose guide, a sliding member or a tip. A boom device for a concrete pump device, comprising: a flexible linear member connected to the base end of a delivery hose, the other end of which is extended from one end connected to the boom via a sheave. .