WO2020003507A1

WO2020003507A1 - Mixer vehicle

Info

Publication number: WO2020003507A1
Application number: PCT/JP2018/024881
Authority: WO
Inventors: 定本　匡市; 本村　政己; 荘太片岡
Original assignee: 極東開発工業株式会社
Priority date: 2018-06-29
Filing date: 2018-06-29
Publication date: 2020-01-02
Also published as: JP7034282B2; JPWO2020003507A1

Abstract

Provided is a mixer vehicle in which a support base for supporting a drum is reinforced, and the support base can be easily mounted on chassis frames. A mixer vehicle 1 is provided with a rear support body 5 mounted on the rear side of a left and right pair of chassis frames 21 so as to straddle the chassis frames 21 and having side panels 52 extending in a front-rear direction on both the left and right sides; and a drum 3 which is configured so that the rear side thereof is rotatably supported by the rear support base 5 and which contains fresh concrete. Each of the side panels 52 has a longitudinal reinforcement section 11 formed by bending the lower end of the side panel 52 inward in the vehicle width direction. The mixer vehicle 1 is further provided with a lateral reinforcement section 12, the opposite ends of which in the vehicle width direction are affixed to the longitudinal reinforcement sections 11 formed on the side panels 52 located on both the left and right sides.

Description

Mixer truck

The present invention relates to a mixer truck.

For example, in a chassis frame of a mixer truck described in Patent Document 1, a front support base and a rear support base are provided at predetermined intervals in the front and rear. The front and rear sides of the drum that transports the ready-mixed concrete while stirring it are rotatably supported by the front support stand and the rear support stand. The lower side of the rear support is reinforced by a pair of vertical reinforcing girders fixed on a pair of left and right chassis frames and a pair of horizontal reinforcing girders connecting these vertical reinforcing girders (Patent Document 1). 1 (see FIGS. 4 and 5).

Chinese Utility Model No. 202574377

When assembling the above-mentioned rear support to the chassis frame, it is necessary to assemble a pair of vertical reinforcement girder connected by the horizontal reinforcement girder under the rear support, and then assemble the vertical reinforcement girder on the chassis frame. And the assembling work was complicated.

The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a mixer truck that can easily assemble a support to a chassis frame while reinforcing a support that supports a drum. .

(1) The present invention is provided over a pair of left and right chassis frames, and has a support having side panels extending in the front-rear direction on both left and right sides, and is rotatably supported by the support and accommodates ready-mixed concrete. A drum having a vertical reinforcing portion formed by bending a lower end of the side panel inward in the vehicle width direction, wherein the side panels are formed on the left and right side panels. This is a mixer truck provided with a horizontal reinforcing portion in which both ends in the vehicle width direction are fixed to a vertical reinforcing portion.

According to the present invention, the support base for supporting the drum has longitudinal reinforcing portions formed by bending the lower end portions of the left and right side panels on the inside in the vehicle width direction, and these longitudinal reinforcing portions have both ends in the vehicle width direction. Is reinforced by the fixed horizontal reinforcing portion. Further, since the lower end portion of the side panel of the support base is a vertical reinforcing portion, when assembling the support base to the chassis frame, the work of assembling the vertical reinforcing girder to the conventional support base becomes unnecessary. Thereby, the support base can be easily assembled to the chassis frame while reinforcing the support base.

(2) The mixer truck further includes an upper bracket fixed to the support base side and fastened to the chassis frame side by a fastening member, wherein the upper bracket is provided on an outer side surface of the side panel in a vehicle width direction. It is preferably fixed.
In this case, the upper bracket can be fixed at an arbitrary position in the front-rear direction on the outer side surface of the side panel in the vehicle width direction. Therefore, when designing the fixing position of the upper bracket with respect to the support base, the design freedom is increased. The degree can be increased.

(3) The mixer truck includes a lower bracket fixed to a lateral side of the chassis frame in a vehicle width direction, and an upper bracket fixed to the support base side outside the side panel in the vehicle width direction. Furthermore, the lower bracket and the upper bracket are fastened by a fastening member in a state in which a lower surface of the vertical reinforcing portion is arranged facing the upper surface of the chassis frame at a predetermined interval, and At least one of the side bracket and the upper bracket is interposed between the upper surface of the chassis frame and the lower surface of the vertical reinforcing portion to apply the load on the support base from the lower surface of the vertical reinforcing portion to the upper surface of the chassis frame. A load transmitting portion for transmitting, wherein the lower bracket and the upper bracket are located above each other on a vehicle width direction outside of an upper surface of the chassis frame. Preferably arranged so as not to interfere with the direction.

In this case, the lower bracket and the upper bracket are fastened with the upper surface of the chassis frame and the lower surface of the vertical reinforcing portion of the support stand spaced apart from each other by a predetermined distance. This can prevent the upper surface of the chassis frame and the lower surface of the vertical reinforcing portion from rubbing against each other when the mixer vehicle travels on a rough road. As a result, damage to the chassis frame and the support table can be suppressed.

少なくとも At least one of the lower bracket and the upper bracket has a load transmitting portion interposed between the upper surface of the chassis frame and the lower surface of the vertical reinforcing portion. The load transmitting portion transmits the load on the support base from the lower surface of the vertical reinforcing portion to the upper surface of the chassis frame. As a result, the load on the support base is transmitted directly downward from the lower surface of the vertical reinforcing portion to the upper surface of the chassis frame via the load transmitting portion, so that the lower bracket is fixed on the outer side surface of the chassis frame in the vehicle width direction. The action of the shearing force on the portion can be suppressed. As a result, it is possible to prevent the lower bracket from falling off the chassis frame due to the load on the support base.

Furthermore, the lower bracket and the upper bracket are arranged so as not to interfere with each other in the vehicle width direction outside the upper surface of the chassis frame in the vehicle width direction. For this reason, even if a vertical dimensional error occurs in one or both of the lower bracket and the upper bracket on the outside in the vehicle width direction, the lower bracket and the upper bracket do not interfere with each other on the outside in the vehicle width direction. Absent. As a result, the lower bracket and the upper bracket interfere with each other due to the dimensional error, so that it is possible to further suppress the shearing force from acting on the fixed portion of the lower bracket.

(4) the mixer truck is mounted on the chassis frame side, a support rotatably supported on the mounting frame about an up-down axis, and is rotated by rotation of the support; A chute that guides the ready-mixed concrete discharged from the drum to the outside, and a regulating device that regulates rotation of the column, the regulating device has an arc portion formed in a semi-arc shape, A pair of clamp members arranged so as to sandwich the outer peripheral surface of the column between the arc portions, and one end of each of the pair of clamp members adjacent to each other in the circumferential direction of the arc portion in the horizontal direction with respect to the mounting frame. A pair of support shafts that are movably supported; and a pair of clamp shafts. Includes a member clamping tightening manner closer, the at least one of the pair of support shafts are preferably fixed to the mounting frame.

In this case, in a state where the outer peripheral surface of the column is sandwiched by a pair of clamp members having arc portions formed in a semi-arc shape, the other ends in the circumferential direction of the arc portions of these clamp members are fastened by a fastening member. Tightened so that they approach each other. Thus, the outer peripheral surface of the column is firmly sandwiched between the arc portions of the pair of clamp members, and the rotation of the column is regulated. Therefore, the rotation of the column can be regulated with a smaller operation force than in the case where the circumferential ends of the single C-shaped clamp member are fastened to each other.

Further, since the support shaft rotatably supporting the one end in the circumferential direction of the arc portion of at least one clamp member is fixed to the mounting frame, it also functions as a member for mounting the regulating device to the mounting frame. Thereby, the configuration of the regulating device can be simplified.

According to the mixer truck of the present invention, the support base can be easily assembled to the chassis frame while reinforcing the support base for supporting the drum.

It is a side view showing the mixer truck concerning one embodiment of the present invention. It is the figure which looked at the mixer truck of FIG. 1 from the back. It is an enlarged side view which shows a rear support stand. It is a top view of a rear support stand. It is the perspective view which looked at the rear support stand from below. FIG. 4 is an enlarged side view of a portion D of FIG. 3 showing a coupling device. FIG. 7 is a sectional view taken along the line II of FIG. 6. It is sectional drawing which shows the 1st modification of a connection device. It is sectional drawing which shows the 2nd modification of a connection device. It is sectional drawing which shows the 3rd modification of a connection device. It is sectional drawing which shows the 4th modification of a connection device. It is sectional drawing which shows the 5th modification of a connection device. It is a side view which shows a chute turning mechanism. It is a top view of a regulation device. It is a side view of a regulation device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Overall configuration of mixer truck]
FIG. 1 is a side view showing a mixer truck 1 according to one embodiment of the present invention. Hereinafter, the front-back direction of the mixer truck 1 is referred to as “front-rear direction”, the up-down direction of the mixer truck 1 is referred to as “up-down direction”, and the left-right direction viewed from the front or rear of the mixer truck 1 is referred to as “vehicle width direction”. In the "vehicle width direction", the direction from the center in the left-right direction to the right or left side of the mixer truck 1 is "outside in the vehicle width direction", and the direction from the right or left side in the left-right direction to the center is ""Inside the vehicle width direction".

In FIG. 1, a mixer truck 1 according to this embodiment includes a vehicle body 2, a front support base (support base) 4 provided above a front part of the vehicle body 2, and a rear support base (support base) provided above a rear part of the vehicle body 2. (A support base) 5 and a drum 3 for storing ready-mixed concrete. The vehicle body 2 has a pair of left and right chassis frames 21 extending in the front-rear direction, and a cross member 22 connecting the chassis frames 21 (see FIG. 3). Note that the chassis frame includes a frame fixed to a cab (cab) and a subframe provided on the frame.
The front support 4 and the rear support 5 are configured separately from each other. By changing the distance in the front-rear direction between the two

supports

4 and 5, the common front support 4 and rear support 5 can be applied to a plurality of types of mixer trucks 1 having different sizes of the drum 3. it can.

(4) The front support 4 rotatably supports the front end of the drum 3, and the rear support 5 rotatably supports the drum 3 with the rear side thereof lifted. Thereby, the drum 3 is rotatably supported around a central axis C inclined as shown in the figure. The drum 3 rotates forward and backward by a driving device (not shown) based on engine power. Thus, the mixer truck 1 can transport the ready-mixed concrete while stirring it in the drum 3. The front support 4 is welded to the upper surface of a vertical reinforcing girder (not shown) welded on the chassis frame 21.

FIG. 2 is a view of the mixer truck 1 as viewed from the rear. 1 and 2, an opening 3a for charging and discharging the ready-mixed concrete is formed at the rear end of the drum 3. A hopper 6 for charging ready-mixed concrete into the drum 3 is provided above and behind the opening 3a. A pair of left and right scoops 7 are provided below the opening 3a, and a chute 8 is provided below these scoops 7. The ready-mixed concrete discharged from the opening 3a is guided to the chute 8 by the scoop 7, and further guided by the chute 8 in a predetermined direction.

[Rear support base]
FIG. 3 is an enlarged side view showing the rear support 5. FIG. 4 is a plan view of the rear support 5. 3 and 4, the rear support base 5 is provided over the rear upper portions of the pair of left and right chassis frames 21. The lower portion of the rear support base 5 includes a front panel 51 disposed on the front side and extending in the vehicle width direction, a pair of side panels 52 disposed on both left and right sides and extending in the front-rear direction, and a rear panel disposed on the rear side and extending in the vehicle width direction. It comprises a rear panel 53 extending and an upper panel 54 arranged on the upper side and extending in the vehicle width direction.

The upper portion of the rear support base 5 includes a pair of support frames 55 extending obliquely rearward and upward from both sides of the upper panel 54 in the vehicle width direction, a pair of upper frames 56 extending rearward from the upper end of each support frame 55, and a pair of upper frames. It comprises a connecting frame 57 for connecting the rear ends of the frames 56 and a work frame 58 provided on one upper frame 56.

FIG. 5 is a perspective view of the rear support 5 as viewed from below, and shows a reinforcing structure on the lower side of the rear support 5. In FIG. 5, each of the side panels 52 arranged on the left and right sides of the rear support base 5 has a flat reinforcing member 11 formed by bending the lower end horizontally inward in the vehicle width direction. Then, both ends in the vehicle width direction of a pair of horizontal reinforcing portions 12 formed of, for example, square pipes are fixed to both ends in the front-rear direction on the upper surface of the vertical reinforcing portions 11.

As described above, the rear support base 5 has the vertical reinforcing portions 11 formed by bending the lower end portions of the left and right side panels 52 inward in the vehicle width direction, and the vehicle reinforcing portion 11 has two longitudinal end portions on the upper surface thereof. Is reinforced by the fixed lateral reinforcing portion 12. Also, since the lower end of the side panel 52 of the rear support 5 is formed as the vertical reinforcing portion 11, when the rear support 5 is mounted on the chassis frame 21, the work of assembling the vertical reinforcing girder with the conventional rear support is unnecessary. Become. Thus, the rear support 5 can be easily assembled to the chassis frame 21 while reinforcing the rear support 5.

[Connecting structure of chassis frame and rear support]
As shown in FIG. 3, a side panel 52 of the rear support base 5 is connected to each chassis frame 21 by a pair of front and rear connecting devices 30. FIG. 6 is an enlarged side view of a portion D in FIG. FIG. 7 is a cross-sectional view taken along the line II of FIG. 6 and 7, the coupling device 30 includes a lower bracket 31 fixed to the chassis frame 21 side, an upper bracket 32 fixed to the rear support base 5 side, and a lower bracket 31 and an upper bracket 32. And a fastening member 33 that is fastened.

上側 The upper bracket 32 of the present embodiment is fixed to the lower side of the side panel 52 on the outer side in the vehicle width direction. Specifically, a lower portion of the side panel 52 is formed with a vertical portion 52a that extends vertically upward from an outer end of the vertical reinforcing portion 11 in the vehicle width direction. A fixed plate portion 321 extending in the vertical direction of the upper bracket 32 is fixed to the side surface by welding in a state in which the fixed plate portion 321 abuts. The lateral reinforcing portion 12 is fixed to the inner side surface of the vertical portion 52a by welding in a state where both lateral end surfaces of the lateral reinforcing portion 12 are in contact with each other.

The upper bracket 32 has the fixed plate portion 321 and a mounting plate portion 322 that extends horizontally from the upper end of the fixed plate portion 321 to the outside in the vehicle width direction. A pair of through holes 323 penetrating in the up-down direction is formed before and after the mounting plate portion 322. A protruding portion 324 that protrudes outward in the vehicle width direction is formed integrally with a center portion of the fixed plate portion 321 in the front-rear direction.
Although not shown, a flat plate is fixed to the lower end of the fixed plate portion 321 and the outer end in the vehicle width direction of the mounting plate portion 322 at both ends in the front-rear direction of the upper bracket 32, and The bracket 32 is reinforced so as to prevent the L-shaped deformation of the bracket 32.

The lower bracket 31 includes a fixed plate portion 311 that extends vertically along a lateral side of the chassis frame 21 in the vehicle width direction, and a flat plate that horizontally extends inward in the vehicle width direction from a middle part of the fixed plate portion 311 in the vertical direction. And a load transmitting portion 312 having a shape. The inner side surface in the vehicle width direction of the lower portion 311a formed below the load transmitting portion 312 of the fixed plate portion 311 is fixed by welding in a state of contacting the outer side surface in the vehicle width direction of the chassis frame 21. ing.

The upper surface of the upper portion 311b formed above the load transmitting portion 312 of the fixed plate portion 311 of the lower bracket 31 is disposed with a gap S1 from the lower surface of the mounting plate portion 322 of the upper bracket 32. . Thus, the upper surface of the upper portion 311b does not contact the lower surface of the mounting plate 322. A concave portion 311c into which the protruding portion 324 of the upper bracket 32 is inserted is formed at the center of the upper portion 311b in the front-rear direction. The bottom surface of the concave portion 311c is arranged with a predetermined gap S2 between it and the lower surface of the protrusion 324. Thus, the bottom surface of the concave portion 311c does not contact the lower surface of the protruding portion 324. Due to the gaps S1 and S2, the lower bracket 31 and the upper bracket 32 are arranged outside the upper surface 21a of the chassis frame 21 so as not to interfere with each other in the vehicle width direction.

The lower bracket 31 is integrally formed on the outer side in the vehicle width direction of the fixed plate portion 311, and further has an engaging portion 313 to which an inner peripheral side portion of an arc portion of the U bolt 34 described later is engaged. I have. The engagement portion 313 is formed in a U-shape when viewed from the side in FIG. 6, and a pair of front and rear upper ends of the engagement portion 313 is disposed so as to straddle the concave portion 311c. A part of the opposing surfaces at both upper ends of the engaging portion 313 and the front and rear side surfaces of the concave portion 311c are formed with a contact surface 314 (the cross hatching in FIG. Part shown with). The contact surface 314 prevents the upper bracket 32 from being shifted in the front-rear direction with respect to the lower bracket 31.

The upper portion 311b of the fixed plate portion 311 of the lower bracket 31 is arranged outside the fixed plate portion 321 of the upper bracket 32 in the vehicle width direction, and the fixed plate portion 321 comes into contact with the upper portion 311b. I have. This prevents the upper bracket 32 from being displaced from the lower bracket 31 in the vehicle width direction.

The load transmitting portion 312 of the lower bracket 31 is interposed between the upper surface 21a of the chassis frame 21 and the lower surface 11a of the vertical reinforcing portion 11 of the side panel 52. The lower surface of the load transmitting portion 312 is fixed by welding while being in contact with the upper surface 21 a of the chassis frame 21. On the upper surface of the load transmitting portion 312, the lower surface 11a of the longitudinal reinforcing portion 11 is placed. Thus, the load transmitting unit 312 can transmit the load on the rear support base 5 from the lower surface 11 a of the vertical reinforcing unit 11 to the upper surface 21 a of the chassis frame 21.
The load transmitting unit 312 is disposed at a position where the lateral reinforcing unit 12 and the position in the front-rear direction overlap. Thereby, the load transmitted from one chassis frame 21 to the rear support base 5 via the load transmission portion 312 during traveling on a rough road can be dispersed to the other chassis frame 21 immediately after passing through the lateral reinforcing portion 12. Therefore, the left and right torsion of the rear support 5 can be suppressed.

The fastening member 33 fastens the lower bracket 31 and the upper bracket 32 with the lower surface 11a of the vertical reinforcing portion 11 of the side panel 52 facing the upper surface 21a of the chassis frame 21 at a predetermined interval. Things. The fastening member 33 of the present embodiment includes a U bolt 34 and a pair of nuts 35 screwed to both ends of the U bolt 34.

両端 Both ends of the U bolt 34 are inserted from below into a pair of front and rear through holes 323 of the upper bracket 32, and nuts 35 are screwed to both ends of the U bolt 34 in the inserted state. Then, by tightening these nuts 35, the arc portion of the U bolt 34 is engaged with the engaging portion 313 of the lower bracket 31. Thus, the lower bracket 31 and the upper bracket 32 are fastened by the fastening member 33, and the rear support 5 is connected to the chassis frame 21 side.

As described above, since the upper bracket 32 of the coupling device 30 is fixed to the outer side surface of the side panel 52 in the vehicle width direction, the upper bracket 32 is positioned at an arbitrary position in the front-rear direction on the outer side surface of the side panel 52 in the vehicle width direction. The bracket 32 can be fixed. Thereby, when designing the fixing position of the upper bracket 32 with respect to the rear support base 5 side, the degree of design freedom can be increased.

The lower bracket 31 and the upper bracket 32 are fastened in such a manner that the upper surface 21a of the chassis frame 21 and the lower surface 11a of the vertical reinforcing portion 11 of the rear support 5 are spaced apart from each other by a predetermined distance. Accordingly, when the mixer truck 1 travels on a rough road, it is possible to prevent the upper surface 21a of the chassis frame 21 and the lower surface 11a of the longitudinal reinforcement 11 from rubbing against each other. As a result, damage to the chassis frame 21 and the rear support 5 can be suppressed.

下 Further, the lower bracket 31 has a load transmitting portion 312 interposed between the upper surface 21 a of the chassis frame 21 and the lower surface 11 a of the vertical reinforcing portion 11. The load transmitting portion 312 transmits the load on the rear support base 5 from the lower surface 11 a of the vertical reinforcing portion 11 to the upper surface 21 a of the chassis frame 21. As a result, the load on the rear support base 5 is transmitted right below from the lower surface 11a of the vertical reinforcing portion 11 to the upper surface 21a of the chassis frame 21 via the load transmitting portion 312. It is possible to suppress the shearing force from acting on the welded portion of the lower bracket 31 on the side surface of. As a result, it is possible to prevent the lower bracket 31 from falling off from the chassis frame 21 due to the load on the rear support base 5 side.

Further, the lower bracket 31 and the upper bracket 32 are arranged so as not to interfere with each other in the vehicle width direction outside the upper surface 21a of the chassis frame 21 in the vehicle width direction. Therefore, even if a dimensional error in the vertical direction occurs in one or both of the lower bracket 31 and the upper bracket 32 on the outer side in the vehicle width direction, the lower bracket 31 and the upper bracket 32 are mutually separated on the outer side in the vehicle width direction. There is no interference. As a result, the lower bracket 31 and the upper bracket 32 interfere with each other due to the dimensional error, so that it is possible to further suppress the shearing force from acting on the welded portion of the lower bracket 31.

[Modification of the coupling device]
FIG. 8 is a cross-sectional view illustrating a first modified example of the connecting device 30. 8, the connection device 30 of the present modified example is different from the above embodiment in the configuration of the lower bracket 31 and the upper bracket 32. The lower bracket 31 is constituted by a fixed plate portion 311 and an engaging portion 313, and does not have the load transmitting portion 312 (see FIG. 7) of the above embodiment. The upper surface of the fixed plate portion 311 and the upper surface of the engagement portion 313 are formed flush.

The upper bracket 32 has a fixed plate portion 321, a mounting plate portion 322, and a flat plate-shaped load transmitting portion 325 that extends horizontally from the lower end of the fixed plate portion 321 to the inside in the vehicle width direction. The load transmitting portion 325 is interposed between the upper surface 21a of the chassis frame 21 and the lower surface 11a of the vertical reinforcing portion 11 of the side panel 52.

上面 The upper surface of the load transmitting portion 325 is fixed by welding in a state of being in contact with the lower surface 11 a of the vertical reinforcing portion 11. The lower surface of the load transmitting section 325 is placed on the upper surface 21a of the chassis frame 21. As a result, the load on the rear support base 5 is transmitted from the lower surface 11a of the vertical reinforcing portion 11 to the upper surface 21a of the chassis frame 21 via the load transmitting portion 325 of the upper bracket 32 in a downward direction. Therefore, also in this modified example, the same operation and effect as those of the above-described embodiment can be obtained.

FIG. 9 is a sectional view showing a second modification of the connecting device 30. As shown in FIG. 9, the connection device 30 of the present modification is a combination of the lower bracket 31 of the above embodiment and the upper bracket 32 of the first modification of FIG. In the present modification, the lower surface of the load transmitting portion 325 of the upper bracket 32 is placed on the upper surface of the load transmitting portion 312 of the lower bracket 31. As a result, the load on the rear support base 5 is directly below the upper surface 21a of the chassis frame 21 from the lower surface 11a of the vertical reinforcing portion 11 via the load transmitting portion 325 of the upper bracket 32 and the load transmitting portion 312 of the lower bracket 31. Transmitted in the direction. Therefore, also in this modified example, the same operation and effect as those of the above-described embodiment can be obtained.

FIG. 10 is a sectional view showing a third modification of the connecting device 30. The coupling device 30 of the present modified example is configured such that the upper bracket 32 and the lower bracket 32 transmit the load on the rear support base 5 side from the vehicle width direction outer side surface of the side panel 52 to the vehicle width direction outer side surface of the chassis frame 21. It differs from the above embodiment in that a bracket 31 is configured.

Specifically, in FIG. 10, the lower bracket 31 is configured by the fixing plate portion 311 and the engaging portion 313, and does not have the load transmitting portion 312 (see FIG. 7) of the above embodiment. The upper surface of the fixing plate portion 311 is formed above the upper surface of the engagement portion 313. In this modification, the upper surface of the fixed plate portion 311 of the lower bracket 31 is attached to the upper bracket with the lower surface of the vertical reinforcing portion 11 of the side panel 52 facing the upper surface of the chassis frame 21 with a gap therebetween. 32 is in contact with the lower surface of the fixed plate portion 321. Accordingly, the load on the rear support base 5 side is changed from the vehicle width direction outer side surface of the vertical portion 52 a of the side panel 52 to the vehicle width direction outer side surface of the chassis frame 21 via the upper bracket 32 and the lower bracket 31. Is transmitted to.

According to this modification, since the lower end of the side panel 52 of the rear support 5 is formed as the vertical reinforcing portion 11, when the rear support 5 is assembled to the chassis frame 21, the vertical reinforcing girder with respect to the conventional rear support is used. No assembly work is required. Thus, the rear support 5 can be easily assembled to the chassis frame 21 while reinforcing the rear support 5.

Further, since the upper bracket 32 of the coupling device 30 is fixed to the outer side surface in the vehicle width direction of the vertical portion 52a of the side panel 52, any upper side surface of the side panel 52 in the vehicle width direction can be used. The upper bracket 32 can be fixed in position. Thereby, when designing the fixing position of the upper bracket 32 with respect to the rear support base 5 side, the degree of design freedom can be increased.

FIG. 11 is a cross-sectional view showing a fourth modification of the connecting device 30. In FIG. 11, the connecting device 30 of the present modification is applied when the lateral reinforcing portion 12 penetrates the vertical portion 52 a of the side panel 52 in the vehicle width direction. Specifically, the connecting device 30 of the present modified example is fixed to the outer end portion 12a that is disposed outside the side panel 52 in the vehicle width direction outside the side panel 52 of the lateral reinforcing portion 12 outside the side panel 52 in the vehicle width direction. The lower bracket 31 on the chassis frame 21 side is fastened to the upper bracket 36 by the fastening member 33. The upper bracket 36 is formed of a flat plate member that is formed long in the front-rear direction (the direction perpendicular to the plane of FIG. 11), and the middle part of the upper bracket 36 in the front-rear direction is fixed to the upper surface of the outer end 12a. Also in the case where the lateral reinforcing portion 12 penetrates the side panel 52 as in the present modification, both ends in the vehicle width direction of the lateral reinforcing portion 12 are fixed to the vertical reinforcing portion 11.

Further, in the present modification, the lower bracket 31 of the coupling device 30 is constituted by the fixing plate portion 311 and the engaging portion 313, and has the load transmitting portion 312 (see FIG. 7) of the above embodiment. Absent. The upper surface of the fixed plate portion 311 and the upper surface of the engagement portion 313 are formed flush. In this modification, the lower surface of the vertical reinforcing portion 11 of the side panel 52 is arranged to face the upper surface of the chassis frame 21 with a gap therebetween, and the upper surface of the fixing plate portion 311 and the engaging portion 313 are formed. The upper surface is in contact with the lower surface of the outer end 12 a of the lateral reinforcing portion 12. As a result, the load on the rear support base 5 is transmitted from the outer end 12 a of the lateral reinforcing portion 12 to the outer side surface of the chassis frame 21 in the vehicle width direction via the lower bracket 31.

Further, in the present modification, the fastening member 33 of the coupling device 30 includes a U-bolt 34 disposed across the outer end 12 a of the lateral reinforcing portion 12, and a pair of nuts screwed to both ends of the U-bolt 34. 35.

両端 At both ends of the upper bracket 36 in the front-rear direction, both ends of the U bolt 34 penetrate from the lower side to the upper side, respectively. The pair of nuts 35 is screwed to both ends of the U bolt 34 on the upper side of the upper bracket 36. Then, by tightening the pair of nuts 35, the lower bracket 31 and the upper bracket 36 are fastened by the fastening member 33 via the outer end 12 a of the lateral reinforcing portion 12.

FIG. 12 is a sectional view showing a fifth modification of the connecting device 30. 12, the connection device 30 of this modification is a modification of the fourth modification of FIG. 11, and the configuration of the lower bracket 31 is different from that of the first modification. The lower bracket 31 of this modified example has a fixed plate portion 311, a load transmitting portion 312, and an engaging portion 313, as in the above embodiment. The upper surface of the fixed plate portion 311 and the upper surface of the engaging portion 313 are arranged with a gap from the lower surface of the outer end portion 12a of the lateral reinforcing portion 12.

According to the fourth and fifth modifications, the lower end of the side panel 52 of the rear support 5 is formed as the vertical reinforcing portion 11, so that when the rear support 5 is assembled to the chassis frame 21, a conventional rear support 5 is used. The work of assembling the vertical reinforcing girder to the support stand becomes unnecessary. Thus, the rear support 5 can be easily assembled to the chassis frame 21 while reinforcing the rear support 5.
Further, according to the fifth modified example, the lower bracket 31 has the load transmitting portion 312 interposed between the upper surface 21a of the chassis frame 21 and the lower surface 11a of the longitudinal reinforcing portion 11. The load transmitting portion 312 transmits the load on the rear support base 5 from the lower surface 11 a of the vertical reinforcing portion 11 to the upper surface 21 a of the chassis frame 21. As a result, the load on the rear support base 5 is transmitted right below from the lower surface 11a of the longitudinal reinforcing portion 11 to the upper surface 21a of the chassis frame 21 via the load transmitting portion 312. It is possible to suppress the shearing force from acting on the welded portion of the lower bracket 31 on the side surface of. As a result, it is possible to prevent the lower bracket 31 from falling off from the chassis frame 21 due to the load on the rear support base 5 side.

[Shoot turning mechanism]
As shown in FIGS. 1 and 2, the mixer truck 1 includes a chute turning mechanism 40 for turning the chute 8 in the horizontal direction. FIG. 13 is a side view showing the chute turning mechanism 40. In FIG. 13, a chute swivel mechanism 40 includes a mounting frame 41 fixed to the vehicle body 2, a support 42 rotatably supported on the mounting frame 41 around an up-down axis X, and a rotation of the support 42. And a regulating device 43 for regulating.

The mounting frame 41 includes a frame main body 411 fixed to the rear panel 53 by projecting rearward from the rear panel 53, an annular mounting plate 412 fixed to the upper surface of the rear end of the frame main body 411, It has a cylindrical portion 413 fixed to the rear end of the frame main body 411 below the plate 412 (see also FIG. 4). The mounting plate 412 and the cylindrical portion 413 are arranged concentrically with the axis X.

The column 42 has a cylindrical vertical portion 421 extending vertically about the axis X, a cylindrical inclined portion 422 extending diagonally upward from the upper end of the vertical portion 421, and a vertical middle portion of the vertical portion 421. And a fixed annular portion 423.
The vertical portion 421 is inserted through the mounting plate 412 and the cylindrical portion 413 of the mounting frame 41. The upper end of the chute 8 is connected to the upper end of the inclined portion 422. The annular portion 423 is formed in an annular shape around the axis X, and has an outer diameter larger than that of the vertical portion 421. The annular portion 423 is placed on the upper surface of the mounting plate 412, and rotates together with the vertical portion 421.

With the above configuration, the chute 8 can be turned in the horizontal direction by rotating the support column 42 around the axis X with respect to the mounting frame 41. Thus, by turning the chute 8 to a desired turning position, the ready-mixed concrete can be guided in a desired direction.

[Regulator]
FIG. 14 is a plan view of a regulating device 43 that regulates the rotation of the support column 42. FIG. 15 is a side view of the regulating device 43. 14 and 15, the regulating device 43 includes a pair of clamp members 44, a pair of support shafts 45, a connecting plate 46, and a tightening member 47.
Each of the clamp members 44 includes an arc portion 441 formed by bending a strip member into a semi-arc shape, a rotating portion 442 integrally formed at one end in the circumferential direction of the arc portion 441, and a circumferential direction of the arc portion 441. And a tightened portion 443 integrally formed on the other end side.

The inner diameter of the semicircular arc portion 441 is set to be the same as the outer diameter of the annular portion 423 of the column 42, and both clamp members 44 are formed by these arc portions 441. 423 is disposed so as to sandwich the outer peripheral surface. In addition, the arc portion 441 formed in a “semi-arc shape” refers to not only the arc portion 441 formed in a semi-arc, but also the arc portion 441 formed slightly shorter than the semi-arc, and slightly longer than the semi-arc. Also includes the formed arc portion 441.

Rotating portion 442 is formed by bending in a hook shape radially outward from one end in the circumferential direction of arc portion 441. As a result, a U-shaped groove 444 is formed between the rotating part 442 and the outer peripheral surface at one end in the circumferential direction of the arc part 441. The rotating portions 442 of the clamp members 44 are adjacent to each other at a predetermined interval in the circumferential direction, and are arranged such that the openings of the groove portions 444 of the clamp members 44 are opposite to each other.

The clamped portion 443 is formed to extend straight radially outward from the other end in the circumferential direction of the arc portion 441, and the clamped portions 443 of both clamp members 44 are spaced apart from each other by a predetermined distance in the circumferential direction. They are arranged next to each other. Of the clamped portions 443 of both clamp members 44, one clamped portion 443 has a through hole 445 that penetrates in the horizontal direction, and the other clamped portion 443 corresponds to the through hole 445. A screw hole 446 penetrating in the horizontal direction at the position is formed.

The pair of support shafts 45 support the rotating portions 442 of both clamp members 44 so as to be rotatable in the horizontal direction with respect to the mounting plate 412 of the mounting frame 41. Each support shaft 45 of the present embodiment includes a cylindrical outer cylinder member 451 and a bolt 452 inserted into the outer cylinder member 451.

The outer tube member 451 is inserted into the groove 444 of the clamp member 44, and the lower end surface in the axial direction of the outer tube member 451 is in contact with the upper surface of the mounting plate 412. The bolt 452 is inserted from above the outer cylindrical member 451 via the connecting plate 46, and the tip of the inserted bolt 452 is screwed into a screw hole 414 formed in the mounting plate 412.

(4) Since the outer cylinder member 451 is clamped between the connecting plate 46 and the mounting plate 412 by tightening the bolts 452, the outer cylinder member 451 cannot rotate around the axis A. Thus, the outer cylinder member 451 is fixed to the mounting plate 412 together with the bolts 452 while being inserted into the groove 444 of the clamp member 44. Thus, the rotating portion 442 of the clamp member 44 is supported on the mounting plate 412 so as to be rotatable in the horizontal direction around the axis A of the outer cylinder member 451.

The connecting plate 46 is disposed so as to straddle the upper side of the rotating portion 442 of the clamp members 44, and a pair of bolts 452 penetrates in both longitudinal ends of the connecting plate 46 in the vertical direction (the plate thickness direction). Have been. Thus, since the pair of bolts 452 are connected by the connecting plate 46, the rotating portions 442 of the clamp members 44 will rotate in the horizontal direction by tightening the tightened portions 443 as described later. In this case, it is possible to prevent the bolt 452 of the support shaft 45 supporting the rotating portion 442 from being distorted.

The tightening member 47 tightens the tightened portions 443 of the clamp members 44 so as to approach each other. The fastening member 47 of the present embodiment includes a connecting rod 471 for connecting the tightened portions 443 to each other, and a handle 472 for rotating the connecting rod 471 about its axis B.
The connecting rod 471 has a large-diameter pressing portion 471a disposed at an intermediate portion in the axial direction, a small-diameter cylindrical portion 471b extending from the pressing portion 471a to one side in the axial direction, and extending from the pressing portion 471a to the other axial side. And a small diameter screw shaft portion 471c.

The screw shaft portion 471c is inserted into the through hole 445 of one of the tightened portions 443 and screwed into the screw hole 446 of the other tightened portion 443. The pressing portion 471a comes into contact with the one tightened portion 443 when the screw shaft portion 471c is tightened, and presses the one tightened portion 443 against the other tightened portion 443. I have. As a result, the clamped portions 443 of the clamp members 44 are tightened so as to approach each other.

The handle 472 has a cylindrical handle body 472a attached at the axially outer end of the cylindrical portion 471b of the connecting rod 471 and penetrating in the radial direction of the cylindrical portion 471b, and screws at both axial ends of the handle body 472a. And a pair of combined cap nuts 472b. The handle main body 472a is slidably attached to the cylindrical portion 471b in the radial direction, and each cap nut 472b abuts on the cylindrical portion 471b to prevent the handle main body 472a from falling off from the cylindrical portion 471b. It is preventing.

With the above configuration, when the connecting rod 471 is rotated in one direction about the axis B by the handle 472, the pressing portion 471a presses the one of the tightened portions 443, and the tightened portions of the two clamp members 44 are pressed. 443 are tightened so as to approach each other. As a result, the outer peripheral surface of the annular portion 423 of the column 42 is firmly sandwiched between the arc portions 441 of the clamp members 44, and the rotation of the column 42 is restricted.

On the other hand, when the rotation of the connecting rod 471 is rotated in the other direction about the axis B by the handle 472 in a state where the rotation of the support column 42 is regulated as described above, the one tightened portion 443 by the pressing portion 471a is operated. Is released, and the tightened portions 443 of the clamp members 44 are separated from each other. Accordingly, the force of pinching the annular portion 423 of the column 42 by the arc portions 441 of the clamp members 44 is weakened, and the column 42 is allowed to rotate.

As described above, the clamped portions 443 of the clamp members 44 are sandwiched between the pair of clamp members 44 having the semicircular arc portions 441 with the outer peripheral surfaces of the columns 42 (ring portions 423) sandwiched therebetween. Are fastened by the fastening member 47 so as to approach each other. As a result, the outer peripheral surface of the column 42 is firmly sandwiched between the arc portions 441 of the pair of clamp members 44, and the rotation of the column 42 is restricted. Therefore, the rotation of the support column 42 can be regulated with a smaller operation force than in the case where the circumferential ends of the single C-shaped clamp member are fastened to each other.

In addition, since the support shaft 45 that rotatably supports the rotating portion 442 of the clamp members 44 is fixed to the mounting frame 41 (the mounting plate 412), the supporting shaft 45 may be a member that mounts the regulating device 43 to the mounting frame 41. Function. Thereby, the configuration of the regulating device 43 can be simplified.

[Others]
The constituent members of the rear support base 5 are not limited to the above-described embodiment, and the constituent members other than the left and right side panels 52 are arbitrarily configured as long as the rear side of the drum 3 can be rotatably supported. be able to.
The fastening member 33 of the above embodiment is constituted by the U bolt 34 and the pair of nuts 35. However, as long as the upper bracket 32 can be fastened to the chassis frame 21 side, the fastening member 33 may be constituted by other fasteners. Good.

In the above embodiment, the reinforcing structure (the vertical reinforcing portion 11 and the horizontal reinforcing portion 12) of the present invention is applied to the rear support 5 and the front support 4 has a conventional configuration. A reinforcing structure may be applied. In this case, the lower end of the side panel 4a (see FIG. 1) of the front support base 4 may be bent inward in the vehicle width direction to form a vertical reinforcing portion.
As described above, in the above embodiment, the front support base 4 and the rear support base 5 are configured separately from each other, and are provided at a predetermined interval in the front-rear direction. The reinforcement structure of the present invention can be applied to the present invention.

In the regulation device 43 of the above embodiment, the pair of support shafts 45 are fixed to the mounting frame 41, but it is sufficient that at least one of the support shafts 45 is fixed to the mounting frame 41. The support shaft 45 functions as a member for attaching the restricting device 43 to the mounting frame 41 by being fixed to the mounting frame 41. However, the restricting device 43 is attached to the mounting frame 41 by a dedicated member other than the support shaft 45. May be attached. In this case, neither of the pair of support shafts 45 needs to be fixed to the mounting frame 41.
For example, when the upper bracket 32 and the lower bracket 31 do not include the load transmitting portion as in the third modification example of FIG. 10, a vertical contact portion between the rear support base 5 and the chassis frame 21 (see FIG. 10). In 10, the contact portion between the upper bracket 32 and the lower bracket 31) may be arranged at a position where the lateral reinforcing portion 12 and the position in the front-rear direction overlap.

It should be noted that the embodiments disclosed this time are illustrative in all aspects and are not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the above description, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 mixer truck 3 drum 4 front support (support)
5 Rear support (support)
Reference Signs List 8 chute 11 vertical reinforcing portion 11a lower surface 12 horizontal reinforcing portion 21 chassis frame 21a upper surface 31 lower bracket 32 upper bracket 33 fastening member 41 mounting frame 42 support column 43 regulating device 44 clamp member 45 support shaft 47 fastening member 52 side panel 312 load Transmission part 325 Load transmission part 441 Arc part X axis

Claims

A support base provided over the upper side of the pair of left and right chassis frames and having side panels extending in the front-rear direction on both left and right sides,
A drum that is rotatably supported by the support base and contains ready-mixed concrete,
Each of the side panels has a vertical reinforcing portion formed by bending a lower end thereof inward in the vehicle width direction,
A mixer truck having a horizontal reinforcing portion having both ends in the vehicle width direction fixed to the vertical reinforcing portions formed on the left and right side panels.
An upper bracket fixed to the support base and fastened to the chassis frame by a fastening member,
The mixer truck according to claim 1, wherein the upper bracket is fixed to a side surface of the side panel on the outside in the vehicle width direction.
A lower bracket fixed to an outer side surface of the chassis frame in the vehicle width direction;
An upper bracket fixed to the support base side outside the side panel in the vehicle width direction,
The lower bracket and the upper bracket are fastened by a fastening member in a state in which a lower surface of the vertical reinforcing portion is arranged at a predetermined interval with respect to an upper surface of the chassis frame and opposed to each other,
At least one of the lower bracket and the upper bracket intervenes between the upper surface of the chassis frame and the lower surface of the vertical reinforcing portion and applies the load on the support base side from the lower surface of the vertical reinforcing portion to the chassis frame. It has a load transmitting part that transmits to the upper surface,
3. The mixer truck according to claim 1, wherein the lower bracket and the upper bracket are arranged so as not to interfere with each other on the outer side in the vehicle width direction from the upper surface of the chassis frame.
An attachment frame fixed to the chassis frame side,
With respect to the mounting frame, a column rotatably supported around a vertical axis,
A chute that is turned by the rotation of the column and guides the ready-mixed concrete discharged from the drum to the outside,
A regulating device for regulating the rotation of the support,
The regulating device,
A pair of clamp members having an arc portion formed in a semi-arc shape, and being disposed so as to sandwich the outer peripheral surface of the support by the arc portion;
A pair of support shafts for supporting the adjacent one ends of the circular arc portions of the pair of clamp members in the horizontal direction with respect to the mounting frame,
A tightening member provided on the pair of clamp members, and tightening so that the other ends in the circumferential direction of the arc portions of the pair of clamp members are brought closer to each other;
4. The mixer truck according to claim 1, wherein at least one of the pair of support shafts is fixed to the mounting frame.