JPH0740599Y2 - Boom device for concrete pump equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a boom device for a concrete pump device, and more particularly to a device that facilitates storage of a delivery hose guided by a hose guide.

[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, the tip side of the front boom of the boom device is configured to be telescopic, and the hose guide for guiding the delivery hose is configured to be movable, and its position is set to that during use and storage. It is possible to change over time.

[Problems to be solved by the device]

In this way, when using the boom device with the tip side of the front boom configured to be telescopic, in order to position the hose guide to the front, the amount of telescopic movement of the front boom (the amount of movement of the hose guide)
However, when the delivery hose is set long and the hose guide is moved forward and positioned, the hanging end of the delivery hose guided by the hose guide is set to a position suitable for pouring 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However, when the boom device was retracted, the delivery hose remained behind the hose guide by the amount that the hose guide moved to the rear, and the tip of the delivery hose drooped downward from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.

On the other hand, if the length of the delivery hose is set so that the tip of the delivery hose is at an appropriate height when the boom device is retracted, the delivery hose will become too short when the hose guide is moved forward and positioned. , Its tip is located too high and is not suitable for pouring ready-mixed concrete.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to deliver 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 front boom. (EN) A boom device of a concrete pump device capable of appropriately setting the amount of hanging of the hose and preventing the delivery hose from hanging even when the hose guide is in the retracted position.

The front boom, the delivery hose that projects from the front boom and discharges the fresh concrete, the arc-shaped guide part that guides the delivery hose and hangs vertically, and the guide hose is provided integrally with the guide part. Hose guide that has a sliding part that is reciprocally provided along the longitudinal direction on the tip side of the boom part, and the sliding part is selected to the storage position or the use position, and the hose guide from the tip of the delivery hose. And a connecting member having a constant length connected to the sliding portion of the above.

[Action]

According to the present invention, when the boom device is used, the hose guide is moved and positioned in the direction of the tip of the front boom.
The delivery hose is piped along the front boom by the amount of movement of the hose guide, and the tip of the delivery hose hangs a required amount from the hose guide.

On the other hand, when the boom device is retracted, the hose guide is moved and positioned in the direction opposite to the tip side of the front boom. At this time, the amount of the delivery hose hanging down from the hose guide tries to increase by the amount of movement of the hose guide, but since the connecting member has a fixed length, the tip of the delivery hose is pulled by the connecting member. The hose guide is bent in a direction substantially along the arc of the hose guide, and the tip of the delivery hose is prevented from drooping largely below the hose guide.

〔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 plurality of booms (first boom 1a, second boom 1a
The boom 1b and the front boom 4) are flexibly connected to each other, and only the front boom 4 is shown in FIG.

As shown in FIG. 3 and FIG. 4, a support portion 5 having a rectangular cross section and a predetermined length is integrally formed on the tip end side of the front boom 4. The first stopper 5A is provided in the middle of the support portion 5.
Is provided, and a second stopper 5B is provided at the tip thereof.

The tip position of the support portion 5 is set at the time of storing the boom device 3 (second
The length is set so as to be substantially the same as the outer end positions of the bent portions of the first boom 1a and the second boom 1b in the state shown by the solid line in the figure).

The supporting portion 5 is provided with a sliding portion that is reciprocally surrounded by the supporting portion 5 and that is composed of a short tubular member 6 having a rectangular cross section. The length of the short tubular member 6 is 1 / N (N = 2 or more) or less of the sliding distance.

The short tube member 6 is connected to the tip of a rod 4b of a hydraulic cylinder 4a attached to the front boom 4 via a bracket 6a, and the rod 4b of the hydraulic cylinder 4a extends and contracts to support the support portion 5. It is designed to move along the longitudinal direction.

A hose guide supporting tubular member 8 is fixedly attached to the short tubular member 6 via supporting plates 7A and 7B, and the hose guide supporting tubular member 8 is spaced from the supporting portion 5 by a predetermined distance. It is in a parallel position. A ring-shaped hose guide mounting flange 9 is fixedly provided at the end of the hose guide supporting tubular member 8. The hose guide mounting flange 9 is mounted at predetermined intervals along the circumferential direction. A plurality of holes 9A are formed.

In FIGS. 5 and 6, 10 is a conventionally known hose guide, which includes an annular flange portion 11, an inner cylindrical member 12 integral with the annular flange portion 11, and an inner cylindrical member.
An outer cylinder member that is concentrically fitted in 12 so as to be relatively rotatable.
13 and a guide portion provided integrally with the outer tubular member 13.
It is composed of 14 and.

The annular flange portion 11 faces the hose guide mounting flange 9 and has mounting screw holes 11 corresponding to the respective mounting holes 9A.
A is formed respectively.

The guide portion 14 is made of a large number of thin pipes 14A, has an arc shape when viewed from the side, and has a semicircular arc shape whose cross section has an inner diameter slightly larger than the outer diameter of the delivery hose 15 (shown in FIG. 1). The delivery hose 15 is housed and guided.

Then, as shown in FIG. 1, FIG. 4 and FIG. 6, bolts (not shown) are respectively inserted into the respective mounting holes 9A of the hose guide mounting flange 9, and the respective bolts are inserted into the hose guide.
The hose guide 10 is attached to the hose guide attachment flange 9 by being screwed into the respective attachment screw holes 11A of the annular flange portion 11 of 10.

Further, a delivery hose 15 is connected to the tip of the transport pipe 2 via a pipe joint 2a. The delivery hose 15 discharges the fresh concrete that is pressure-fed from a concrete pump (not shown) and is for supporting a hose guide. The tubular member 8 and the inner tubular member 12 of the hose guide 10 are inserted, guided along the guide portion 14 and bent into an arc shape, and the tip end 15A thereof hangs down.

Then, as shown in FIG. 1, the tip of the delivery hose 15
15A and a base portion 1 of a support pipe extended from a triangular plate member 10A that is provided below the outer tubular member 13 of the hose guide 10.
It is connected to 0B by a connecting member having a constant length, which is a rope 16 having shackles 16a and 16b at both ends.

Therefore, when the boom device 3 is used, the hydraulic cylinder 4a
When the rod 4b is extended by operating the
Hose guide with the short support member 5 attached to the support 5
10 is moved to the tip 5C (shown in FIG. 3) of the support portion 5 and positioned, and the hose guide 10 is in the state shown by the solid line in FIG. 1 (shown by the chain double-dashed line in FIG. 2). At this time, the working range of the boom device 3 is expanded by the amount based on the moving amount L of the hose guide 10. And the delivery hose 15 is a hose guide
It is piped along the support portion 5 of the front boom 4 by a movement amount of 10, and the tip 15A thereof hangs down from the hose guide 10.

On the other hand, when the boom device 3 is retracted, the hydraulic cylinder 4a is
When the rod 4b of the front boom 4 is contracted, the hose guide 10 attached to the short tubular member 6 is moved and positioned on the support portion 5 of the front boom 4 to the root portion 5D in the direction opposite to the tip 5C of the support portion 5. The hose guide 10 is in the state shown by the chain double-dashed line in FIG. At this time, the amount of the delivery hose 15 hanging down from the hose guide 10 tries to increase by the amount of movement of the hose guide 10, but the tip 15A of the delivery hose 15 is pulled by the rope 16 and the lower arc of the hose guide 10 is pulled. It will be bent along.

According to the above configuration, the tip end 15A of the delivery hose 15
And the root portion 10A attached via the inner tubular member 12 and the outer tubular member 13 of the hose guide 10 via a rope 16, and reciprocating the hose guide 10 along the longitudinal direction of the tip boom 4. , When the boom device 3 is used, the delivery hose 15 is set to a position where the amount of hanging from the hose guide 10 is suitable for the placing work of the fresh concrete, and the operability of the work of discharging the fresh concrete from the delivery hose 10 is improved. be able to.

On the other hand, when the boom device 3 is retracted, since the rope 16 has a constant length, the distal end 15A of the delivery hose 15 is pulled by the rope 16 to be bent so that the distal end position does not droop greatly. Can be higher. As a result, for example, in the case of a concrete pump car, when the vehicle is running, it prevents the delivery hose 15 from vibrating and hitting other parts and damaging them, and the tip 15A of the delivery hose 15 is grounded. The damage can be prevented without reaching.

In this embodiment, the rope 16 is given as an example of the connecting member, but the connecting member is not limited to this, and may be a wire or a chain, for example.
Alternatively, it may be a rod-shaped member.

Further, in the present embodiment, on the support portion 5 formed on the tip side of the front boom 4, the front boom 4 is provided via the short tubular member 6.
By using a structure in which the hose guide 10 that is separate from the hose can be reciprocated, the same effect as when the front boom 4 is extended can be obtained when the boom device 3 is used, and when the boom device 3 is retracted, Although it is possible to obtain the same effect as contracting the front boom 4, it is not limited to such a structure, and for example, the tip end portion of the front boom 4 is configured as a telescopic support device including a hydraulic cylinder, By integrally providing the hose guide at the tip of the rod of the hydraulic cylinder, the hose guide can be reciprocated.

[Effect of device]

As described above, according to the present invention, the tip of the delivery hose and the root of the hose guide are connected via the connecting member having a fixed length, and the hose guide is reciprocated along the longitudinal direction of the front boom. Thus, when the boom device is used, the delivery hose can be positioned so that the amount of hanging it from the hose guide is appropriate, and the operability of the work of discharging the fresh concrete from the delivery hose can be improved.

On the other hand, when the boom device is retracted, the connecting member has a fixed length, so the distal end of the delivery hose is pulled by the connecting member so that it is bent, and the position of the distal end does not hang down greatly, As a result, for example, in the case of a concrete pump car, it prevents the delivery hose from vibrating and hitting other parts when it is running, and it also prevents the delivery hose from being damaged. The tip does not reach the ground,
This has an effect of preventing the damage.

[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 sectional view taken along line II-II of FIG. 3, FIG. 5 is a side view of the hose guide of FIG. 1, and FIG.
The figure is a view from the direction of arrow A in FIG. [Explanation of symbols for main parts] 1 …… Concrete pump device 3 …… Boom device 4 …… Front boom 6 …… Short cylinder member (sliding part) 10 …… Hose guide 10A …… Root part 14 …… Guide part 15 …… Delivery hose 15A …… Tip 16 …… Rope (connecting member).

Claims (1)

[Scope of utility model registration request] 1. A front boom, a delivery hose that projects from the front boom and discharges fresh concrete, an arc-shaped guide part that guides the delivery hose and hangs down vertically, and an integral part of the guide part. A hose guide that is provided on the front end side of the front boom and is reciprocally provided along the longitudinal direction of the front boom, and the slide part is selected to the storage position or the use position, and the delivery hose. A boom device for a concrete pump device, comprising a connecting member having a constant length connected from the tip of the to the sliding part of the hose guide.