JPH1058432A - Supporting structure of hopper of concrete pump truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the possibility of interference of a hopper sliding means such as a hydraulic cylinder with the surface of the ground at the time of running, even when the center of the base part of a hopper is made low and a discharge port for discharging ready-mixed concrete is provided in the center of the base part in order to lessen the residual ready-mixed concrete. SOLUTION: A hopper support base 4 is made to have a construction being equipped with a pair of supporting mechanism parts 43a and 43b each of which is composed of a fixed-side member engaged with a truck body and an extension-contraction-side member fitted extensibly and contractibly in the fixed-side member and supporting a hopper 5 slidably, and the paired supporting mechanism parts 43a and 43b are so disposed as to keep out of the central part on the lower surface side of the base part of the hopper 5 and to support the parts opposite to each other with the central part between, while a hopper sliding means 40 is disposed outside the supporting mechanism part 43a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete pump truck, and more particularly, to a hopper supporting structure for feeding ready-mixed concrete to a concrete pump.

[0002]

2. Description of the Related Art One of the typical concrete pump vehicles has a structure in which a squeezing type pump is mounted on a rear part of a vehicle body and a hopper is mounted on a hopper support (hopper frame) mounted on the vehicle body. There is. In such a concrete pump truck, for example, a hopper supporter provided with two supporter bodies arranged side by side in the front-rear direction of the vehicle body is used. A hopper is placed on the main body of the book.

In such a concrete pump truck, the ready-mixed concrete supplied to the hopper from the mixer truck is fed into a pumping tube made of an elastic material of a squeeze pump through a discharge pipe, and is then discharged from the pumping tube by a roller. It is squeezed out and pumped to a predetermined construction site via a concrete transfer pipe.

In the above-mentioned squeezing type pump, the inner surface of the pumping tube is worn due to its use.
To prevent damage, slide the hopper support base back and forth with the hydraulic cylinder to disconnect the hopper (discharge tube) from the pumping tube, or use the part that is not worn by shifting the pumping tube back and forth. It is configured to be able to.

The hydraulic cylinder is disposed below a discharge pipe extending forward from the hopper and between two rod-shaped support base bodies constituting the hopper support base. . Further, the above-described conventional concrete pump truck is further configured so that the hopper support base can be horizontally turned so that the pumping tube can be easily replaced.

[0006]

However, in the above-mentioned conventional concrete pump truck, the hydraulic cylinder is disposed between the two support base bodies constituting the hopper support below the center of the bottom of the hopper. Therefore, for example, in order to reduce the ready-mixed concrete remaining in the hopper, the bottom portion of the hopper is inclined downward from the peripheral portion toward the central portion, and an L-shaped discharge port is provided at a discharge port in the central portion. When a pipe is provided, the position of the hydraulic cylinder must be lowered to avoid interference with the discharge pipe, and the hydraulic cylinder may interfere with the ground during traveling.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and there is no need to dispose a hopper slide means or the like at a low position close to the ground, and there is no possibility of interference with the ground during running. It is intended to provide a support structure.

[0008]

In order to achieve the above object, a hopper supporting structure for a concrete pump truck according to the present invention comprises a vehicle body, a squeezed concrete pump mounted on the vehicle body, and fresh concrete supplied to the concrete pump. A hopper for feeding, the hopper is mounted on the hopper, and the concrete pump and the hopper are engaged with the hopper as necessary. A hopper support structure for a concrete pump truck comprising hopper slide means for sliding the hopper in the front-rear direction of the vehicle body, wherein the hopper support base is engaged with and fixed to the vehicle body; A telescoping side member that is telescopically fitted to the fixed side member so that the hopper mounted thereon can slide. And a pair of support mechanisms, each of which supports the opposing portion with the center interposed therebetween, avoiding the center on the bottom lower surface side of the hopper. And the hopper slide means is disposed outside the support mechanism.

In the hopper support structure of the present invention, the support mechanism is disposed so as to support both sides of the hopper, avoiding the central portion on the bottom lower surface side, and the hopper slide means is provided with support means. Since it is disposed outside the mechanism (the side opposite to the center of the bottom of the hopper), the lower part of the hopper can be used effectively. By inclining downward toward the side and providing a ready-mixed concrete discharge port at the bottom center, it is possible to reduce the amount of ready-mixed concrete remaining in the hopper.

The hopper support structure for a concrete pump truck according to the present invention is characterized in that the telescopic side member is a tubular member fitted to the fixed side member.

This makes it possible to reliably disperse the stress applied to the telescopic side member and the fixed side member during the telescopic operation of the telescopic side member, and it is easy to dispose the hopper slide means on one side thereof. And it becomes possible to make the said expansion-contraction side member expand and contract reliably.

Further, in the hopper supporting structure for a concrete pump truck according to the present invention, the hopper sliding means for sliding the hopper is a hydraulic cylinder, and the hydraulic cylinder is a hopper supporting member of the pair of supporting mechanisms. It is characterized in that it is disposed outside the support mechanism closer to the center of rotation of the table.

As described above, as the hopper sliding means,
If a hydraulic cylinder is used and the hydraulic cylinder is disposed outside the support mechanism closer to the center of rotation of the hopper support, it is possible to shorten the distance for disposing hoses and the like to the hydraulic cylinder, It is possible to reduce costs and prevent a hose or the like from hindering work.

Further, since the hopper slide means is not disposed too close to the ground, it is possible to prevent the hopper slide means from interfering with the ground during traveling.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be shown and features thereof will be described in more detail. FIG. 1 is a plan view showing a hopper support structure of a concrete pump truck according to one embodiment of the present invention, FIG.
FIG. 3 is a right side view, FIG. 4 is a left side view, and FIG. 5 is a view showing a main part of the concrete pump truck of the present invention.

As shown in FIG. 5, this concrete pump truck 1 has a car body 2, a squeezable concrete pump 3 mounted on the car body 2, and a hopper support (hopper frame) attached to the rear part of the car body 2. 4 placed on,
And a hopper 5 for feeding the ready-mixed concrete to the concrete pump 3. The ready-mixed concrete put into the hopper 5 is supplied from the discharge port 5a to the pumping tube 7 of the concrete pump 3 through the discharge pipe 6, and the rollers 10 And is pumped from the concrete transfer pipe 8 to a predetermined construction site.

In this concrete pump truck, as the hopper 5, in order to reduce the remaining fresh concrete, the bottom is inclined downward from the periphery toward the center, and the hopper 5 is discharged into the center (lowest part). An outlet 5a is provided, and a hopper having an L-shaped discharge pipe 6 attached to the discharge port 5a is used.

In this concrete pump truck, as shown in FIGS. 1 to 4, the hopper support 4 on which the hopper 5 is mounted has a shaft (shaft support means) 11 at one end thereof.
(FIG. 1), and is attached to the vehicle body 2 in such a manner that it can be turned horizontally.

As shown in FIGS. 1 to 7 (particularly FIGS. 6 and 7), the hopper support 4 is a tubular member (fixed side member) 41 having a quadrangular cross section engaged with the vehicle body 2. And a pair of support mechanisms 43a and 43b, each of which has a quadrangular cylindrical member (elongation-side member) 42, which is fitted to the fixed-side member 41 so as to be able to expand and contract.
Is mounted on the telescopic side member 42. The hopper support 4 is disposed so as to support both sides of the bottom of the hopper 5 while avoiding the center of the bottom surface of the hopper 5 where the discharge port 5a is formed. The hopper 5 placed on the telescopic member 42 in this manner is moved by the operation of the hydraulic cylinder (hopper sliding means) 40.
As the vehicle 2 expands and contracts, it slides in the front-back direction of the vehicle body 2.

A hydraulic cylinder (hopper slide means) 40 for sliding the hopper 5 by expanding and contracting the expandable side member 42 is closer to the center of rotation (ie, the shaft 11) of the pair of support mechanisms 43a and 43b. It is arranged outside (side part) of one of the support mechanisms 43a.

The concrete pump truck 1 of this embodiment has a positioning means 14 for positioning the vehicle body 2 and the hopper support 4 and a vehicle body 2 disposed near the positioning means 14. And securing means 15 for securing the hopper support 4.

Incidentally, the positioning means 14 is shown in FIGS.
As shown in FIG. 9 and the like, the shaft support means 1 of the hopper support 4
1 includes a wedge-shaped engaging portion 12 disposed on the other end side not supported by the shaft 1 and an engaging portion 13 having a V-shaped groove 13a disposed on the vehicle body 2 side. The hopper support 4 and the vehicle body 2 are connected in a predetermined positional relationship by engaging the pair of engaging portions 12 and 13.

The securing means 15 is provided with a main securing means 16 having a large securing strength by screwing and an auxiliary securing means 17 which can be easily secured by inserting a pin. As shown in FIG. 9, the main securing means 16 includes a vehicle body side bracket 20 in which a bolt 19 to which a nut 18 is attached at the tip is rotatably mounted by a shaft 28, and a groove in which the bolt 19 fits. Hopper support side bracket 2 provided
2 are formed. The auxiliary securing means 17 includes a projection 24 having a pin hole provided on the hopper support bracket 22, a pin hole 25 formed on the vehicle body bracket 20, and a pin 26. Have been.

In the hopper supporting structure of the concrete pump truck 1 configured as described above, the supporting mechanism 43
a, 43b, the center of the bottom of the hopper 5 is avoided and both sides of the hopper 5 are supported, and the hydraulic cylinder 40 is disposed outside the support mechanism 43a closer to the center of rotation. In order to reduce the amount of concrete, the bottom of the hopper 5 is formed so as to be inclined downward from the peripheral part toward the central part, and a discharge port 5a is provided at the central part (lowest part). Also in the case where the structure is attached, it is not necessary to dispose the hydraulic cylinder 40 at a position excessively close to the ground, and it is possible to avoid the hydraulic cylinder 40 from interfering with the ground during traveling.

The hopper support 4 is composed of a fixed member 41 supported by the vehicle body 2 and a pair of support mechanism portions 43a formed by combining a tubular expandable member 42 externally fitted to the fixed member 41. , 43b, and each member 41, 42 is formed in a cylindrical shape. Therefore, even if the hopper slide means (hydraulic cylinder) 40 is disposed outside the support mechanism 43a, the expansion / contraction operation of the expansion / contraction side member 42 is performed. In this case, the stress applied to the telescopic side member 42 and the fixed side member 41 is easily dispersed, and the telescopic side member 42 expands and contracts smoothly, so that the hopper 5 can be slid reliably.

Since the hydraulic cylinder for sliding the hopper 5 is disposed outside the support mechanism 43a closer to the center of rotation of the hopper support 4, the hydraulic cylinder 40 extending from the vehicle body side is provided. This makes it possible to shorten the distance for disposing hoses and the like, thereby making it possible to reduce costs and prevent the hoses and the like from hindering work.

In the above embodiment, the hopper support 4
Fixed member 41 constituting the supporting mechanism portions 43a, 43b
Although the description has been made of the case where the tubular elastic member 42 is fitted to the outside of the cylindrical member, the elastic member may be inserted into the tubular fixed member so as to be extendable.

Further, in the above embodiment, the case where only one hydraulic cylinder as the hopper sliding means is used has been described. However, two hydraulic cylinders may be arranged outside each support mechanism. It is possible.

The present invention is not limited to the above embodiment, but relates to the specific structure of the squeezing concrete pump, the shape and structure of the hopper and the hopper support, the type of the hopper slide means, and the like. Various applications and modifications can be made within the scope of the gist.

[0030]

As described above, the hopper supporting mechanism of the concrete pump truck according to the present invention supports the supporting mechanism constituting the hopper supporting base on both sides of the hopper, avoiding the central portion on the bottom lower surface side. And the hopper slide means is disposed outside the support mechanism, so that the space below the hopper can be effectively used. Therefore, for example, a configuration in which the bottom of the hopper is inclined downward from its periphery toward the center and a discharge port for ready-mixed concrete is provided at the center of the bottom to reduce the amount of ready-mixed concrete remaining in the hopper. It becomes possible to take.

Further, by making the elastic member a cylindrical member, the elastic member can be easily and reliably expanded and contracted even if the hopper slide means is arranged on one side thereof.

When a hydraulic cylinder is used as the hopper sliding means, and the hydraulic cylinder is disposed outside the support mechanism closer to the center of rotation of the hopper support, a hose or the like may be disposed on the hydraulic cylinder. The distance can be shortened, the cost can be reduced, and the work can be prevented from being hindered by a hose or the like.

In addition, when the hopper has a bottom portion inclined downward from the peripheral portion toward the center portion and a discharge port for discharging the ready-mixed concrete is formed in the center of the bottom portion. Since the hopper slide means is disposed outside the support mechanism constituting the hopper support base and is not disposed too close to the ground, it prevents the hopper slide means from interfering with the ground during traveling. can do.

[Brief description of the drawings]

FIG. 1 is a plan view showing a hopper support structure of a concrete pump truck according to one embodiment of the present invention.

FIG. 2 is a front view showing a hopper support structure of the concrete pump truck according to one embodiment of the present invention.

FIG. 3 is a right side view showing a hopper support structure of the concrete pump truck according to one embodiment of the present invention.

FIG. 4 is a left side view showing a hopper support structure of the concrete pump truck according to one embodiment of the present invention.

FIG. 5 is a view showing a main part of a concrete pump truck to which the hopper support structure according to the embodiment of the present invention is applied.

FIG. 6 is a right side sectional view schematically showing the structure of a support mechanism of the hopper support structure according to the embodiment of the present invention.

FIG. 7 is a cross-sectional view (enlarged cross-sectional view) taken along line VII-VII of FIG. 6, showing a structure of a support mechanism of the hopper support structure according to the embodiment of the present invention.

FIG. 8 is a diagram showing a schematic configuration of a means for aligning a hopper support and a vehicle body of a concrete pump truck to which a hopper support structure according to an embodiment of the present invention is applied.

FIG. 9 is a diagram showing a schematic configuration of a securing means between a hopper support base and a vehicle body of a concrete pump truck to which a hopper support structure according to an embodiment of the present invention is applied.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Concrete pump truck 2 Body 3 Concrete pump 4 Hopper support stand (hopper frame) 5 Hopper 5a Discharge port 6 Discharge pipe 7 Pumping tube 8 Concrete transfer pipe 10 Roller 11 Shaft (shaft support means) 14 Alignment means 15 Fastening means 40 Hydraulic cylinder (hopper sliding means) 41 Fixed side member 42 Telescopic side member 43a, 43b Support mechanism

Claims (3)

[Claims] 1. A vehicle body, a squeezed concrete pump mounted on the vehicle body, a hopper for feeding ready-mixed concrete to the concrete pump, and the hopper mounted thereon, and the concrete pump and the hopper Hopper support structure for a concrete pump truck, comprising: a hopper support base attached to a vehicle body so as to be capable of engaging and disengaging horizontally, and a hopper slide means for sliding the hopper in the front-rear direction of the vehicle body. Wherein the hopper supporter can be extended and contracted to the fixed-side member so that the fixed-side member engaged with and fixed to the vehicle body and the hopper mounted thereon can be slid. And a pair of support mechanisms having a telescopic side member that fits into the hopper, and the pair of support mechanisms is a bottom lower surface of the hopper. The hopper slide means is disposed outside the support mechanism portion, while being arranged so as to support a portion opposed to the center portion while avoiding the center portion. Hopper support structure for a concrete pump truck. 2. The hopper support mechanism for a concrete pump truck according to claim 1, wherein said telescopic side member is a tubular member which fits over said fixed side member. 3. The hopper slide means for sliding the hopper is a hydraulic cylinder, and the hydraulic cylinder is a hydraulic cylinder of a support mechanism of the pair of support mechanisms that is closer to the center of rotation of the hopper support base. The hopper support structure for a concrete pump truck according to claim 1, wherein the hopper support structure is disposed outside.