JPH0349854Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a chute device attached to a truck mixer vehicle and used when discharging ready-mixed concrete from the mixer drum.

``Conventional technology'' A truck mixer truck mixes ready-mixed concrete (hereinafter referred to as ``ready-mixed concrete'') with a mixer drum to prevent it from solidifying and transports it to the pouring site while maintaining its quality. In many cases, the ready-mixed concrete is provided to concrete pump trucks. FIG. 6 shows a state in which fresh concrete from the truck mixer vehicle 1 is being supplied to the concrete pump vehicle 2. The rear of the truck mixer vehicle 1 is brought close to the rear of the concrete pump vehicle 2. The chute main body 4 of the chute device 8, which is in the retracted state during traveling, is unfixed, swiveled and erected, and positioned on the hopper 5 of the concrete pump truck 2 as shown in the figure, and then the mixer drum 6 is reversed and the ready-mixed concrete is removed. is discharged and supplied into the hopper 5.

As shown in FIG. 7, the above-mentioned chute device 3 has a rotating member 8 attached to a mounting seat 7 provided at a rear position of the mixer drum 6 so as to be rotatable in a horizontal plane. , the above-mentioned chute body 4 consisting of a main chute part 4a and an auxiliary chute part 4b is attached so as to be vertically tiltable, and between the lower surface of the main chute part 4a of the chute body 4 and the lower end of the rotary member 8, It has a structure in which telescopic arm members 9 are connected, and the swinging and raising/lowering operations of the chute main body 4 are performed by the driver of the truck mixer vehicle 1 or the concrete pump vehicle 2, or by an auxiliary worker in the pouring operation using the chute device. I went to 3 and did it manually.

However, in recent years, for the purpose of improving workability, it has been desired to automate the turning and raising/lowering operations of the chute body 4, and as shown in FIG. and the rotating member 8
A pin-on is attached to the pin-on, and a rack attached to the rod of the cylinder is engaged with the pin-on, and the chute body 4 is rotated via the rack, pin-on, and rotating member 8 by the expansion and contraction of the cylinder (Japanese Patent Application Laid-Open No. 1986-1999) 75825) was developed.

"Problems to be Solved by the Invention" However, while the former raising/lowering cylinder 11 does not pose any particular problems, the latter rack/pinion rotating structure has the following problems.

In other words, it improves the turning performance of the chute body,
Furthermore, in order to improve turning accuracy, it is necessary to use a pinion with a large diameter, but if this is done, a cylinder with a large stroke must be attached to a bearing in the vehicle body. Since a cylinder with a large stroke is mounted horizontally on a vertical bearing, it is unstable no matter how it is mounted, and it also gets in the way. This is disadvantageous in that it increases the length of the truck mixer vehicle.

The object of the present invention is to provide a chute device for a truck mixer vehicle that can automate the turning of the chute body, has good operability, and is easy to install.

"Means for Solving the Problems" In order to achieve the above object, the present invention provides a mounting seat having a cylindrical member at the rear end of a bracket that protrudes rearward from approximately the center of the support frame of the mixer drum. is attached to the cylindrical member with the cylindrical member substantially vertical, and a rotating member having a pivot shaft is inserted into the cylindrical member of the mounting seat to be rotatably attached in a horizontal plane, and a rotary member is attached to the rotating member with the pivot shaft inserted into the cylindrical member of the mounting seat. In a chute device for a truck mixer vehicle, the main body is attached to a pin so as to be vertically tiltable about the pin as a fulcrum, and a tilting cylinder is provided between the pivot shaft and the chute body, and the left and right portions of the front end of the bracket are provided. A transmission wheel is attached to the pivot shaft, and a first guide wheel that rotates in substantially the same horizontal plane as the transmission wheel is attached to the left and right sides of the support frame. and a second guide wheel are individually arranged, and a third guide wheel and a fourth guide wheel that rotate in substantially the same horizontal plane as the transmission wheel and both guide wheels are individually attached to the support seat, while the above-mentioned 1st guide ring and 2nd guide ring
A double-rod type drive cylinder with individual rods at the left and right ends is placed between the guide wheels, and the moving direction of the rods is aligned with the axis that connects the front peripheries of the first guide ring and the second guide ring. A transmission cable is wound around the rear peripheral edge of the transmission wheel, and one end of the transmission cable is wound inside the third guide ring and then connected to the first guide ring. The other end of the transmission cable is wound around the outside of the ring and connected to one rod of the drive cylinder, and the other end of the transmission cable is wound around the inside of the fourth guide ring and then wound around the outside of the second guide ring. The structure is such that it is connected to the other rod of the drive cylinder.

"Operation" When the drive cylinder is operated in one direction, the transmission wheel rotates in one direction via the transmission cable, causing the chute body to swing in one direction. Furthermore, when the drive cylinder is actuated in the other direction, the transmission wheel rotates in the other direction, causing the chute body to pivot in the other direction.

Drive cylinders generally have the disadvantages of single rod type cylinders (the area on the head side of the piston and the area on the rod side are different by the thickness of the rod,
Due to this difference, the extension driving force and the contraction driving force are different. ), the control system for turning the chute body to the left and the control system for turning it to the right can be the same, resulting in good turning operability. Furthermore, since the drive cylinder is disposed between the first transmission wheel and the second transmission wheel,
It doesn't protrude much to the rear of the vehicle and has good stability. Furthermore, when the drive cylinder is in the neutral state, if the chute body does not face backwards correctly, or if the chute body is over-rotated to one side and stored, the right and left third The turning position of the chute body can be easily corrected without operating the guide wheel and the fourth guide wheel to remove the transmission cable.

"Embodiment" An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

The mounting seat indicated by 7 in the figure is attached to the rear surface of the support frame 12 of the mixer drum 6 via a bracket 13, and a fixed flange 7b is attached to the upper surface of a cylindrical member 7a arranged with its axis directed in the vertical direction. It consists of being fixed. A support member 8 is attached to the upper surface of a movable flange 8b on which a pivot shaft 8a is provided below.
A rotating member 8 formed with a rotary member 8 is inserted with its pivot 8a through the cylindrical member 7a with their axes aligned with each other, and its movable flange 8b is placed on the fixed flange 7b, The chute body 4 is attached to the upper end of the support member 8c of the rotary member 8 via a pin 14, so as to be rotatable in a horizontal plane. In addition, bracket 13
As is clear from the figure, it projects rearward and has a mounting seat 7 at its rear end.

Further, a tilting cylinder 11 is connected between the lower surface of the chute main body 4 and the pivot shaft 8a of the rotating member 8, as in the conventional case.
By telescopically operating the chute body 4
can be raised and lowered up and down centering on a pin 14.

Furthermore, a transmission sprocket (transmission wheel) 15 is provided at the lower end of the pivot shaft 8a of the rotating member 8, and a transmission sprocket (transmission wheel) 15 is connected to the key 1.
6 prevents rotation, and the end plate 1
7 prevents it from coming off downward and is fixed with the axis directed in the vertical direction. Furthermore, a pair of left and right brackets 18, 18 extending left and right are fixed to a lower position on the rear surface of the support frame 12, and a pair of upper and lower mounting shafts 19, 19 are attached to the outer ends of each of the brackets 18, 18. are fixedly mounted with their axes oriented upward and downward via support plates 20, 20, and each mounting shaft 19, 19 has a pair of left and right first shafts which are rotated in the same horizontal plane as the transmission sprocket 15. , second guide sprockets (guide wheels) 21 and 22 are attached via bearings 23 and 23, respectively. Furthermore, a substantially U-shaped extension frame 24 is provided at the rear end of the lower frame 12a of the support frame 12, and the extension frame 24 has a central portion that can be rotated in the horizontal direction to adjust its position. A pair of support seats 25, 25
are provided at appropriate intervals on the left and right sides, and mounting shafts 26, 26 are fixedly attached to the respective support seats 25, 25 with their axes directed upward and downward. Transmission sprocket 1
5. A pair of left and right third and fourth guide sprockets (guide wheels) 27 and 28 that are rotated in the same horizontal plane as the first and second guide sprockets 21 and 22.
are attached via respective bearings 29, 29.

On the other hand, in the center of the rear lower part of the support frame 12, a drive cylinder 30 consisting of a double rod type hydraulic cylinder is installed to support the pair of left and right brackets 1.
A pair of mounting members 31, 31 at each inner end of 8, 18
It is supported through the turrets and is disposed with its axis oriented horizontally to the left and right. Further, a chain (transmission cable) 32 is wound around the transmission sprocket 15, and one end 32a of the chain 32 extends forward and is wound around the third guide sprocket 27 from the inside. , changes direction to the left (downward in FIG. 1) and is wound around the first guide sprocket 21 from the outside, changes direction and extends rightward (upward in FIG. 1) to the left of the drive cylinder 30. The other end 32b of the chain 32 extends forward, is wound around the second guide sprocket 28 from the inside, and then is connected to the right end of the rod 30a via a connecting fitting 33. The second guide sprocket 22 is wound around the second guide sprocket 22 from the outside, the second guide sprocket 22 is turned, and the second guide sprocket 22 is wound around the second guide sprocket 22 from the outside. The drive cylinder 30 and the first,
The locations of the second guide sprockets 21 and 22 are as follows:
The moving direction of the rods 30a, 30b is the first guide wheel 2.
1 and the front (left side in FIG. 1) of the second guide wheel 22, and the axis of the drive cylinder 30 coincides with the straight line connecting the front (left side in FIG.
The position is aligned with the axis of the (towing section).

In the figure, reference numeral 35 is a power unit for operating the cylinders 11 and 30, and a switch box 36 for operating the power unit 35 is provided near the power unit 35. Further, the tension of the chain 32 can be appropriately adjusted by rotating the support seats 25, 25 and changing the positions of the third and fourth guide sprockets 27, 28. Furthermore, 37 in the figure is a chain 32.
The cover 38 is a guide for the connecting fitting 34.

Therefore, when supplying fresh concrete from the truck mixer vehicle 1 to the concrete pump vehicle 2 at the pouring site,
When or before the truck mixer vehicle 1 retreats, the chute body 4, which is stored in the storage state while the vehicle is running, is raised and turned to position it above the hopper 5, and then the mixer drum 6 is reversed to dump the ready-mixed concrete into the hopper 5. However, in the chute device having the above configuration, the chute main body 4 can be automatically raised and rotated. That is, the raising/lowering cylinder 1
When the first rod 11a is extended, the chute body 4 rotates upward about the pin 14 and is erected to a predetermined height. Further, from the state shown in FIG. 1 (in this state, the chute main body 4 is directed to the right as shown in FIG. 3), the drive cylinder 30 is actuated to retract the left rod 30a and to retract the right rod 30a. When the other rod 30b is extended, chain 3
1, one end 32a of the chain 32 is moved in the direction indicated by arrow r, causing the transmission sprocket 15 to rotate clockwise in FIG. And this transmission sprocket 15
The rotation of the chute body 4 is transmitted to the rotating member 8.
is made to look at the world horizontally and is made to face the hopper 5 of the concrete pump truck 2.

As described above, in the above-mentioned chute device, since the chute body 4 can be automatically raised and rotated by the raising/lowering cylinder 11 and the drive cylinder 30, the work efficiency is increased compared to the conventional one. The labor burden on the worker is reduced, and the chute body 4
The installation time is reduced.

Further, in the above chute device, the drive cylinder 30, the first,
Second guide sprockets 21 and 22 are provided, and a connecting fitting 33 connecting the chain 32 and the rod 30a of the drive cylinder 30 is attached to the guide 3.
8, the chain 32 is pulled by the drive cylinder 30 very smoothly. Furthermore, a double rod type hydraulic cylinder is used as the drive cylinder 30, and the drive cylinder 30 is disposed at the rear lower part of the support frame 12 with its axis facing left and right, so that the chute main body 4
The surrounding structure can be kept simple as before. Therefore, there is no risk that the equipment will get in the way and the workability of cleaning the mixer drum 6 will deteriorate.

In the above, the chute main body 4 can be stored by operating each of the cylinders 30 and 11 in the reverse direction. In addition, each cylinder 30, 11 is operated by the driver of the truck mixer vehicle 1 or the concrete pump vehicle 2, or an auxiliary worker in the pouring work, by operating a switch in the switch box 36; If a switch is installed in the vehicle, remote control from the driver's seat is also possible.

"Effects of the Idea" As explained above, the shute device of this book has a mounting seat having a cylindrical member attached to the rear end of the bracket that protrudes rearward from approximately the center of the support frame of the mixer drum. The rotating member is mounted vertically and has a pivot on the mounting seat, and the pivot is inserted into the cylindrical member of the mounting seat so that it can rotate freely in a horizontal plane, and the chute body is attached to the rotating member with a pin. In a chute device for a truck mixer vehicle, which is mounted so as to be tiltable up and down using a pin as a fulcrum, and in which a tilting cylinder is provided between the pivot shaft and the chute body, support seats are provided horizontally on the left and right portions of the front end of the bracket. A transmission wheel is attached to the pivot shaft, and a first guide wheel and a second guide wheel are mounted on the left and right sides of the support frame and rotate in substantially the same horizontal plane as the transmission wheel. wheels are arranged individually, and a third guide wheel and a fourth guide wheel that rotate in substantially the same horizontal plane as the transmission wheel and both guide wheels are individually attached to the support seat; Between the guide wheel and the second guide wheel, there is a double rod type drive cylinder with individual rods on the left and right ends. A transmission cable is wound around the rear peripheral edge of the transmission wheel, and one end of the transmission cable is connected to the inside of the third guide ring. 1st after being wound on
The transmission cable is wound on the outside of the guide ring and connected to one rod of the drive cylinder, and the other end of the transmission cable is wound on the inside of the fourth guide ring and then wound on the outside of the second guide ring. Since the chute body is rotated and connected to the other rod of the drive cylinder, the chute body can be automatically pivoted to any left or right position by the telescopic operation of the drive cylinder.

Further, since the drive cylinder is of a double rod type, the control system for turning the chute body to the left and the control system for turning it to the right can be the same, and the turning operability is good.

Furthermore, the drive cylinder has a first guide wheel and a second guide wheel.
Since it is installed horizontally between the guide wheels with its expansion and contraction direction facing the width direction of the car body, it does not protrude significantly towards the rear of the car body, providing good stability and simplifying the structure around the chute body. It does not interfere with mixer drum cleaning and worsen work efficiency.

Moreover, if only one guide wheel (tension roll) is provided to adjust the tension of the transmission cable, when the tension of the transmission cable is adjusted, the transmission cable will be rotated by the drive cylinder and the drive cylinder. If the proper relationship with the chute body is disrupted, for example, since the drive cylinder is in a neutral state, the chute body will not face backwards correctly and may shift to the left or right. , it is equipped with two tension rolls on the left and right sides of the third guide wheel and the fourth guide wheel, so that the chute body can be correctly faced rearward when the drive cylinder is in its neutral state, and it can also be used to extend the drive cylinder to one side. The relationship between the drive cylinder and the chute body can be freely adjusted while maintaining the appropriate tension of the transmission cable, such as by causing the chute body to over-rotate to one side when retracted and retracted. , it has the advantage of being easy to handle.

[Brief explanation of drawings]

Figures 1 to 5 show an embodiment of the present invention, in which Figure 1 is a sectional view taken along the - arrow in Figure 2, Figure 2 is a side view, Figure 3 is a rear view, and Figure 4 is a side view. 1 is a cross-sectional view taken in the direction indicated by the arrow in FIG. 1, FIG. FIG. 8 is a side view of a conventional chute main body device. 4... Chute body, 8... Rotating member, 11...
... Lifting cylinder (lifting device), 15... Transmission sprocket (transmission wheel), 30... Drive cylinder, 3
2...Chain (transmission cable).

Claims (1)

[Scope of utility model registration request] At the rear end of a bracket 13 protruding rearward from approximately the center of the support frame 12 of the mixer drum 6,
A mounting seat 7 having a cylindrical member 7a is mounted with the cylindrical member 7a substantially perpendicular to the mounting seat 7, and a rotating member 8 having a pivot 8a is inserted into the mounting seat 7 by inserting the pivot 8a into the cylindrical member 7a of the mounting seat 7. The chute body 4 is attached to the rotating member 8 so as to be rotatable in a horizontal plane, and the chute body 4 is attached to the rotary member 8 with a pin 14 so as to be able to rise and fall up and down using the pin 14 as a fulcrum. Lifting cylinder 11
In the chute device for a truck mixer vehicle, support seats 25 are disposed on the left and right portions of the front end of the bracket 13 so that their positions can be adjusted in the horizontal direction, and a transmission wheel 15 is attached to the pivot shaft 8a. A first guide wheel 21 and a second guide wheel 22 that rotate in substantially the same horizontal plane as the transmission wheel 15 are individually arranged on the left and right sides of the mount 12, and the transmission shaft 15 is mounted on the support seat 25. , and a third guide ring 27 and a fourth guide ring 28 that rotate in substantially the same horizontal plane as both guide wheels 21 and 22.
are individually attached, while the first guide wheel 2
A double-rod type drive cylinder 30, which has rods 30a and 30b on the left and right ends, is located between the first guide wheel 21 and the second guide wheel 22. The front peripheral edges of the two guide wheels 22 are fixed to the support frame 12 side with the front peripheral edges of the two guide wheels 22 aligned with the axes connecting the two guide wheels 22, and the transmission wheels 1
A transmission cable 32 is wound around the rear peripheral edge of the transmission cable 32, and one end 32a of the transmission cable 32 is wound inside the third guide ring 27 and then wound outside the first guide ring 21. One rod 30a of the drive cylinder 30
and the other end 32b of the transmission cable 32
is wound inside the fourth guide wheel 28 and then wound around the outside of the second guide wheel 22 to connect the drive cylinder 3.
A chute device for a truck mixer vehicle, characterized in that the chute device is connected to the other rod 30b of the truck mixer vehicle.