JPH0647686Y2 - Concrete mixer car - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a concrete mixer truck, and more particularly, to an improvement of a concrete mixer truck in which a hopper is formed so as to be rotatable with respect to a drum body.

[Conventional technology]

In a concrete mixer truck, it is necessary to regularly clean the inside of the drum body that contains the mix concrete. Therefore, in recent years, concrete mixer trucks have been equipped with a hopper 1 as shown by an arrow in FIG.
Is formed so as to be rotatable with respect to the drum body 2.

The hopper 1 is formed so as to be rotatable with respect to the drum body 2 because the bracket 3 fixed to the hopper 1 is pivotally attached to the stay 4 arranged on the fixed side which is the vehicle body side. Has been done.

Therefore, as shown by the arrow in FIG. 4, when the hopper 1 is turned over, the opening end 2a of the drum body 2 is largely opened, and the drum body 2 of the drum body 2 is opened through the opening end 2a. It is said that it will be possible to easily perform cleaning work to remove concrete slag accumulated inside.

[Problems to be solved by the invention]

However, in the above-mentioned conventional concrete mixer truck, even if the hopper 1 is turned over so as to cover the drum main body 2 above, it is easily returned and rotated due to strong wind or other external force action. There is an inconvenience,
When the return rotation is in the process of cleaning the open end 2a of the drum body 2, there is a danger of causing a personal injury.

Therefore, an object of the present invention is to newly provide a concrete mixer truck which has a simple structure and can prevent return rotation when the hopper is reversed.

[Means for solving problems]

In order to achieve the above object, the structure of the present invention is such that a stay fixed to the vehicle body side is arranged close to the opening end side portion of the drum body, and a side portion of the hopper arranged facing the opening end portion of the drum body. In the concrete mixer truck in which a bracket is fixed to the rear part of the stay, the rear part of the bracket is rotatably pivoted to the rear part of the stay, and the hopper can be inverted above the drum main body around the pivotal part. It is characterized in that a hole is formed in front of the pivotally connected portion with the bracket, and a locking member is inserted into the hole when the hopper is turned over to engage the rear end of the bracket.

[Operation] When the hopper is rotated in one direction, for example, in the clockwise direction around the pivotally connecting portion of the stay and the bracket, the hopper is turned over to the upper part of the drum main body, and when the hopper is turned in the counterclockwise direction from this position, the hopper is turned and is rotated. It faces the open end of the drum body.

When a locking member such as a bolt is inserted through the hole of the stay at the time of reversing, the rear end of the bracket engages with the locking member and the movement of the bracket and the hopper in the reverse direction is blocked.

〔Example〕

 Hereinafter, the present invention will be described based on the illustrated embodiments.

As shown in FIG. 1, in the concrete mixer truck according to the present invention, as in FIG. 4, a substantially horizontal stay 4 fixed to the vehicle body side is arranged close to the side of the open end 2a of the drum body 2. , A substantially horizontal bracket 3 is fixed to a side portion of the hopper 1 arranged so as to face the opening end 2a of the drum body 2, and the bracket 3 is attached to the rear portion of the stay 4 via a bolt nut 5 or the like.
The rear part is rotatably pivotally mounted so that the hopper 1 can be inverted above the drum main body 2 around the bolt as the pivotal part.

A hole 4b is formed in the stay 4 on the front side (left side in FIG. 1) of the pivotal connection with the bracket 3, and when the hopper 1 is turned over, a locking member 7 made of a bolt is inserted into the hole 4b to insert the bracket. The rear end which is the tapered pivoting end of 3 is engaged (FIG. 2). That is, the bracket 3 is fixed to the hopper 1, and the stay 4 provided at the upper end of the pillar P erected on the stage S or the like on the vehicle body side on which the bracket 3 is fixed serves to use the bolt nut 5 or the like. Therefore, the hopper 1 is turned upside down with respect to the drum body 2 as shown by the arrow in the figure, and is also rotated back.

The bracket 3 fixedly attached to the hopper 1 and pivotally attached to the stay 4 is formed so as to be adjacent to the stay 4 when the hopper 1 is returned (in use shown by the solid line in FIG. 1). With respect to the stay 4, its rotation is prevented by a stopper member 6 made of a bolt nut or the like inserted in the holes 3a and 4a formed in the bracket 3 and the stay 4, respectively. Is formed.

That is, in the hopper 1, the lower end of the leg portion 1a attached to the outer wall of the intermediate trunk portion is locked to the upper surface of the stage S to set a predetermined rotational position at the time of return. However, since the hopper 1 can rotate in the reversal direction only by supporting the leg portion 1a, the rotation in the reversal direction is prevented and the hopper 1 is stabilized.
A stopper member 6 which is inserted into the bracket 3 and the stay 4 is provided.

Therefore, in the above-described embodiment, when the hopper 1 is going to be turned over, the stopper member 6 is removed from the bracket 3 and the stay 4, and the hopper 1 is lifted from this state, The hopper can be inverted by setting the pivot end of the bracket 3 as the center of rotation.

The stay 4 has a bracket 3 when the hopper 1 is turned over.
A hole 4b is formed so as to be positioned near the pivot end of the. Then, as shown in FIG. 2, the locking member 7 is inserted into the hole 4b. and again,
In this embodiment, the locking member 7 is made of a bolt, and when the bolt is inserted into the hole 4b, the outer circumference of the head portion of the locking member 7 is brought into contact with the outer circumference of the pivot end of the bracket 3. In other words, it is formed so as to prevent the rotation of the bracket 3.

In the present embodiment, as described above, the bolt nut as the stopper member 6 that enables fixing at the time of returning the hopper 1 is not used when the hopper 1 is reversed, so only the bolt of the bolt nut is used. Can be diverted to a bolt as the locking member 7.

Therefore, in the above-described embodiment, when the hopper 1 is turned over as shown in FIG. 2, the stay 4 for pivotally mounting the bracket 3 is located near the pivot end of the bracket 3. The locking member 7 is inserted into the bored hole 4b, and the locking member 7 is brought into contact with the pivot end of the bracket 3 to rotate the bracket 3, that is, the hopper 1. The return rotation of is blocked.

FIG. 3 shows another embodiment according to the present invention, in which a protrusion 3b is formed at the pivot end of the bracket 3, and the protrusion 3b is the stay. 4 is formed so as to be located above the hole 4b. Then, assuming that the locking member 8 made of a simple rod-shaped body is inserted into the hole 4b of the stay 4, the locking portion 8 is brought into contact with the lower end edge of the protruding portion 2b and the bracket 3 is returned. It is supposed that rotation in the direction is blocked.

In any of the above-described embodiments, the pivoting end of the bracket 3 is brought into contact with the locking members 7 and 8 inserted in the hole 4b of the stay 4, whereby the bracket 3 rotates, that is, In order to prevent the return rotation of the hopper 1, for the purpose of the present invention, the hopper 1 is turned upside down and the bracket 3 and the stay 4 are provided so as to face each other. Of course, the rotation of the bracket 3 may be prevented by inserting an appropriate locking member into the hole.

[Effect of device]

As described above, according to the present invention, since it is possible to easily maintain the hopper in the inverted state so as to cover and cover the upper part of the drum body, the cleaning work inside the drum body may be a risk of returning rotation of the hopper. There is an advantage that it can be performed without any problem.

Further, according to the present invention, since the structure for preventing the return rotation of the hopper only needs to be provided with the hole in the stay and the preparation of the locking member, a large design change is required to cover a complex multi-branch. However, there is also an advantage that it is extremely economically advantageous.

Further, according to the present invention, since the operation for preventing the return rotation of the hopper is only required to insert the locking member into the hole of the stay, the operation itself is simple, and the operation is reversed as before. There is also an advantage that the trouble such as fixing the hopper with a rope or the like or stopping the vehicle in a so-called rising state so that the hopper is not easily returned and rotated is not brought.

Further, according to the present invention, as the locking member used when the hopper is turned over, it is possible to use a fixing stopper member for maintaining the state when the hopper is returned, which is convenient. There are also advantages that can be obtained.

[Brief description of drawings]

FIG. 1 is a side view showing a concrete mixer truck according to an embodiment of the present invention in a partially enlarged manner by breaking it, FIG. 2 is an enlarged side view thereof, and FIG. 3 is another embodiment of FIG. 4 is a perspective view showing a concrete mixer truck as a conventional example. 1 ... Hopper, 2 ... Drum body, 3 ... Bracket, 4 ... Stay, 4b ... Hole, 6 ... Stopper member, 7,
8: Locking member.

Claims (1)

[Scope of utility model registration request] 1. A stay fixed to the vehicle body is arranged close to an opening end side portion of a drum body, and a bracket is fixed to a side portion of a hopper arranged so as to face the opening end of the drum body. In a concrete mixer truck in which the rear part of the bracket is rotatably pivoted to the rear part and the hopper can be turned over above the drum main body around the pivotal part, in the stay, the front side from the pivotal part with the bracket. In the concrete mixer truck, a hole is formed, and when the hopper is turned over, a locking member is inserted into the hole to engage the rear end of the bracket.