JPS635242B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chute turning device for a mixer truck or the like.

Conventionally, as a swing device for the chute of a mixer truck, there is a system in which the lower part of the chute is supported by a universal joint and rotates in the left and right direction in a horizontal plane. Because of this, it is extremely unstable, and because the structure of the swinging device is complicated, it is expensive, and because the swinging device cannot be easily attached and removed, it is not easy to scrape off adhering ready-mixed concrete. Ta.

In view of the above, the present invention provides an annular guide rail having a U-shaped cross section that is fixed to the vehicle body, and a swing band whose length can be adjusted freely engaged with a circumferential groove of the annular guide rail. To provide a rotating device with a simple structure that improves stability by attaching it to a rotating device and making it easy to attach and detach.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, reference numeral 1 denotes a swing device attached to a vehicle body 2 of a mixer truck, and is composed of a guide rail 3 and a swing band 4. A chute 5 is held on the swing band 4. ing.

The guide rail 3 is an annular body having a U-shaped cross section with a circumferential groove 6 formed on its outer circumferential surface, and has a pair of arms 7.
The arm 7 is pivotally supported by a pin 9 to a bracket 8 protruding from the vehicle body 2, and the guide rail 3 is supported by the vehicle body 2 so as to be rotatable in the vertical direction. 10 is a chain connected between the vehicle body 2 and the guide rail 3, and holds the guide rail 3 in a horizontal state.

The rotating band 4 has a plurality of stoppers 12 fixed to the inner surface of an annular main body 11 cut at one place, and both ends of the main body 11 are bent outward to form flanges 13, 13 facing each other. The flanges 13, 13 are connected by bolts 14 and nuts 15, and a spacer or the like is interposed between the flanges 13, 13 so that the circumferential length of the band 4 can be adjusted. The stopper 12 is engaged with the circumferential groove 6, so that the band 4 is rotatably supported with respect to the guide rail 3, and a pair of chute engaging bosses 16, 16 are protruded from both sides of the outer peripheral surface of the main body 11. There is.

A pair of locking arms 18, 18 having an engagement groove 17 are fixed to one end of the chute 5.
The chute 5 is held by the band 4 by inserting the boss 16 into the band 4.

Reference numeral 19 designates an external retaining member of the locking arm 18 that is fitted into the boss 16, and 20 represents a retaining pin of the external retaining member 19 that is inserted into the boss 16.

Next, the operation will be explained. When the guide rail 3 is stored, it is rotated upward around the pin 9, and when working, it is held horizontally extended as shown in FIG.
Guided by. To change the guiding direction, the band 4 is rotated along the guide rail 3.
Further, the chute 5 is attached or detached by removing the outer retaining member 19 and the retaining pin 20.

Although this embodiment has been described with respect to the chute 5 of a mixer truck, the present invention is not limited to the chute 5 of a mixer truck.

As described above, the swing device of the present invention has a simple structure in which an annular guide rail having a U-shaped cross section is fixed to the vehicle body, and a swing band whose length can be freely adjusted is engaged with the circumferential groove of the annular guide rail. Therefore, the chute held by the rotation band can be rotated with good stability. Moreover, disassembly and replacement of the swing band are extremely easy, attachment and detachment of the chute is also easy, cleaning can be performed easily, and furthermore, manufacturing is easy and costs can be reduced.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention, and FIG. 1 is a side view of the rotating device partially in section, FIG. 2 is a plan view of the rotating band, and FIG. 3 is a plan view of the rotating device. be. DESCRIPTION OF SYMBOLS 1... Swivel device, 3... Guide rail, 4... Swivel band, 5... Chute, 6... Surrounding groove, 11
...Main body, 12...Stopper, 13...Flange, 16...Boss.

Claims (1)

[Claims] 1. An annular guide rail having a U-shaped cross section and having a circumferential groove formed on its outer circumferential surface is fixed to the vehicle body, a swing band is engaged with the circumferential groove so as to be able to rotate freely and adjust its length, and a chute is attached to the swing band. A swivel device characterized in that it is detachably engaged.