JP7612293B2 - Mixer Truck - Google Patents

Description

The present invention relates to a mixer vehicle.

Conventionally, mixer trucks have been known in which a drum for loading ready-mixed concrete inside is rotatably mounted on a vehicle frame (see, for example, Patent Document 1). The vehicle frame of the mixer truck is provided with a hopper having an inlet at the top end and a bottom end that communicates with the inside of the drum, and a scoop and chute that serve as a discharge passage for the ready-mixed concrete. Ready-mixed concrete can be charged into the drum through the hopper, and the drum can be rotated forward to mix the ready-mixed concrete with a blade while transporting it. At the destination (transport destination), the drum can be rotated in the reverse direction to discharge the mixed ready-mixed concrete through the scoop and chute.

For example, as shown in FIG. 14, in such a mixer truck, in order to discharge ready mixed concrete to the desired position, the chute 510 is equipped with a rotating shaft 511, a tub-shaped chute body 512, and an extendable adjuster 520 pivoted to the rotating shaft 511 and the chute body 512. The chute 510 is capable of rotating around the rotating shaft 511 that extends vertically. Meanwhile, when the vehicle is traveling, the chute 510 is held by the chute catch 530 in a state facing, for example, almost straight to the side (facing approximately 90° to the right with respect to the direction of travel of the vehicle), and rotation is restricted in this state.

The chute catch 530 shown in FIG. 14 is composed of a bracket 538 attached to the right side of the drum stand 500 on which the rear end of the drum is placed, and a lever member 531 attached to the rear of the bracket 538 and rotatable back and forth around shaft 534. An arc-shaped holding portion 538d that opens toward the rear is formed at the rear end of the bracket 538. The lever member 531 is formed with an arc-shaped holding portion 531a that opens toward the front, and the upper part is pulled forward by a spring 533.

When holding the chute 510 in the chute catch 530, the chute 510 is rotated toward the back of the page around the vertically extending portion of the rotating shaft 511 to face almost sideways, and the operating part 532 attached to the lever member 531 is operated upward to face the holding part 531a backward. In this state, the tube part 521 of the adjuster 520 is pushed into the holding part 538d (holding part 531a), and then the operation of the operating part 532 is released, so that the tube part 521 is sandwiched and held by the holding part 538d and the holding part 531a. At this time, the tension force of the spring 533 maintains the holding part 538d and the holding part 531a in close contact with the tube part 121, suppressing rattling and vibration of the chute 510 when the vehicle is traveling. Instead of operating the operating part 532, the chute 510 can be held by pressing the tube part 521 against the part of the lever member 531 that extends rearward to rotate the lever member 531, or by operating the lever member 531 to push it down.

International Publication No. 2014/064828

When the vertical inclination angle of the chute body 512 is changed as shown by arrow A to match the discharge position of the ready-mix concrete, the adjuster 520 expands and contracts accordingly, and the inclination angle of the adjuster 520 itself also changes as shown by arrow B. The attachment position and attachment angle of the chute catch 530 are adjusted so that the adjuster 520, which has been returned to the specified contracted position, can be held by the surface contact of the holding parts 538d and 531a. However, there are cases where the adjuster 520 does not return completely to the specified contracted position, for example, if dirt gets into the adjuster 520. If the chute 510 is rotated almost straight to the side in this state, the inclination angle of the adjuster 520 relative to the chute catch 530 will shift, making it difficult to fit, or even if it does fit, it will be difficult to securely hold it by surface contact.

The present invention was made in consideration of the above-mentioned circumstances, and aims to provide a mixer truck that has a simple structure yet can securely fit and hold an adjuster in the chute catch.

The present invention provides a means for solving the above-mentioned problems as follows: That is, the present invention is a mixer vehicle including a chute that can be rotated around a rotation axis that extends vertically relative to a vehicle body, and a chute catch that holds the chute at a predetermined rotation position, the chute including a chute body that is pivotally connected to the rotation axis and can change the tilt angle in the vertical direction, and an adjuster that is pivotally connected to the rotation axis and the chute body and expands and contracts according to the tilt of the chute body to change the tilt angle in the vertical direction, and the chute catch including a bracket attached to the vehicle body, a holding portion that is provided on the bracket and abuts against the adjuster to hold the adjuster, and a left-right adjustment portion that rotates the holding portion in the left-right direction, which is the vehicle width direction of the vehicle body, to adjust the position in the left- right direction.

According to the above configuration, the holding part that holds the adjuster can be rotated left and right by the left and right adjustment part to adjust the position left and right, and the position of the chute catch can be adjusted so that the tilting adjuster can be securely held. This makes it possible to securely fit and hold the adjuster in the chute catch in a mixer vehicle, even with a simple configuration.

In the above configuration, it is preferable that the bracket comprises a base end bracket attached to the vehicle body, and a tip bracket having the retaining portion and attached to the base end bracket by bolt fastening, and the left/right adjustment portion is a long hole for bolt fastening provided in at least one of the base end bracket and the tip bracket, and the long hole is formed extending in the left/ right direction.

According to the above configuration, the bracket used in conventional mixer vehicles is divided into two parts, and the bolt holes are designed to allow the position of the holding part to be adjusted to match the inclination of the adjuster, even with a simple configuration. In detail, when the base bracket and the tip bracket are fastened with a bolt, the long hole is used to adjust the position in the left-right direction. In this case, since the bolt can move left-right within the long hole, one of the base bracket and the tip bracket can be rotated left-right relative to the other bracket to match the mounting angle of the other bracket to the inclination angle of the adjuster. Therefore, even if the adjuster does not return to the specified reduced position, the adjuster can be reliably held by the holding part.

In the above configuration, it is preferable that the chute catch has a front-rear adjustment part that adjusts the position of the holding part in the front-rear direction.

According to the above configuration, the left-right adjustment section and the front-rear adjustment section are used to adjust the left-right position of the holding section of the chute catch as well as the front-rear position. This allows the adjuster to be securely fitted and held in the chute catch in a mixer vehicle, even with a simple configuration.

In the above configuration, it is preferable that the chute catch has a vertical adjustment part that adjusts the vertical position of the holding part.

According to the above configuration, the left-right adjustment section and the up-down adjustment section are used to adjust the left-right position of the holding section of the chute catch as well as the up-down position. This allows the adjuster to be securely fitted and held in the chute catch in a mixer truck, despite the simple configuration.

According to the present invention, the holding part that holds the adjuster is rotated left and right by the left and right adjustment part to adjust the position left and right, and the position of the chute catch can be adjusted so that the tilting adjuster can be securely held. This makes it possible to securely fit and hold the adjuster in the chute catch in a mixer vehicle, even with a simple configuration.

FIG. 2 is a side view showing the mixer vehicle according to the present embodiment. FIG. 2 is a plan view showing the mixer vehicle. FIG. 2 is a rear view showing the mixer vehicle. FIG. 2 is a side view showing a chute, a chute catch, etc., provided on the mixer vehicle. FIG. 11 is a rear view showing a shot, a shot catch, etc. 5 is a view taken along line X1-X1 of FIG. 4. FIG. 6 is a view taken along line X2 of FIG. 5 . FIG. 4 is a side view showing the vehicle body side plate of the chute catch. FIG. 4 is a front view showing the first bracket of the chute catch. FIG. 4 is a side view showing the first bracket of the chute catch. FIG. 13 is a rear view showing the second bracket of the chute catch. FIG. 13 is a diagram showing a schematic configuration of a shot catch according to the first modified example. FIG. 13 is a diagram showing a schematic configuration of a shot catch according to a second modified example. FIG. 1 is a side view showing a chute, a chute catch, etc. provided in a conventional mixer vehicle.

The following describes an embodiment of the present invention with reference to the drawings. Note that the arrows in each drawing define the front-back, left-right, and up-down directions.

Figures 1 to 3 show a mixer truck 1 according to this embodiment. The mixer truck 1 is equipped with a cabin 4 having a vehicle compartment 3 at the front of a vehicle body frame 2, and a drum 5 that mixes ready-mixed concrete with an internal blade (not shown) is supported at the rear of the vehicle body frame 2 so as to be freely rotatable with a center of rotation that slopes downward toward the front. A water tank 19 that stores water for washing is installed at the front right side of the vehicle body frame 2.

A support pillar 6 is erected at the rear end of the vehicle body frame 2 and has left and right opposing parts 6a at the top that extend upward while facing each other on the left and right. The rear end of the drum 5 is rotatably supported by a pair of left and right guide rollers 6b provided at the center of this support pillar 6 (the base end of the left and right opposing parts 6a).

A hydraulic drive unit 8 equipped with a hydraulic pump, hydraulic motor, etc. is connected to the front end of the drum 5. The drive unit 8 is driven by a traveling engine E to rotate the drum 5 forward and reverse. The mixer vehicle 1 is configured to travel by transmitting the driving force of the traveling engine E to the rear wheels 9, and this traveling engine E may be either a diesel engine or a gasoline engine.

At the upper end of the support 6, a connecting bracket 10 is provided that connects the upper ends of the left and right opposing parts 6a at the rear. A pair of auxiliary frames 11 extending upward are erected at the upper ends of the left and right opposing parts 6a of the support 6. A hopper 12 is fixed to the upper end of each auxiliary frame 11 for feeding fresh concrete into the drum 5 from the rear end of the drum 5. At the rear end of the drum 5, left and right scoops 13 and a chute 14 are arranged. The left and right scoops 13 are arranged in an inverted "V" shape so that the lower ends approach each other when viewed from behind. The upper end of the chute 14 is arranged below the part where the lower ends of the left and right scoops 13 approach each other.

Ready-mixed concrete is poured into the drum 5 via the hopper 12, and is transported while being mixed by the blades by rotating the drum 5 forward with the rotation of the drive unit 8. At the destination (transportation destination), the drum 5 is rotated in the reverse direction by the rotation of the drive unit 8, and the mixed ready-mixed concrete is discharged via the scoop 13 and chute 14 by the action of the blades.

Figures 4 and 5 show the chute 14, chute catch 30, etc. provided on the mixer vehicle 1.

The chute 14 is composed of a bucket-shaped chute body 14a through which the ready-mix concrete flows, a rotating shaft 15 that supports the chute body 14a, and an adjuster 20 that holds the chute body 14a at a predetermined inclination angle.

The rotating shaft 15 has a vertical section 15a that is supported rotatably around a vertical axis by the drum stand 5a on which the rear end of the drum 5 is placed and extends in the vertical direction, and an inclined section 15b that is connected to the upper end of the vertical section 15a, bent, and positioned below the chute body 14a. The upper end of the inclined section 15b is rotatably attached to the upper underside of the chute body 14a via pin 15c. The lower end of the vertical section 15a is rotatably attached to one end of an adjuster 20 via pin 15d. The other end of the adjuster 20 is rotatably attached to the lower underside of the lower part of the chute body 14a via pin 20a.

The adjuster 20 includes a tube portion 21, a shaft portion 22 inserted into the tube portion 21 so as to be slidable in the axial direction, and a lock portion 23 that locks the sliding movement of the shaft portion 22. The adjuster 20 is configured to expand and contract as a whole by the shaft portion 22 sliding relative to the tube portion 21. Note that a hydraulic cylinder may be used instead of the manual adjuster 20.

The chute 14 can rotate within a range of approximately 180° around the vertical section 15a by rotating the rotating shaft 15 relative to the drum stand 5a. In addition, by releasing the locking section 23, the shaft section 22 of the chute 14 can slide relative to the cylindrical section 21, and the vertical inclination angle of the chute body 14a can be changed around the pin 15c. This makes it possible to discharge the ready-mix concrete in the drum 5 to the desired position.

On the other hand, when the vehicle is traveling, the chute 14 is held in a storage position facing almost directly to the side (in Figures 3 and 5, a position facing approximately 90 degrees to the right with respect to the direction of travel of the vehicle) by the chute catch 30, and rotation of the chute 14 is restricted in this storage position. Details of the chute catch 30 will be described later.

The extension chute 14b is arranged at the discharge end (lower end) of the chute body 14a so that it can rotate up and down. The extension chute 14b is formed as a gutter-shaped passage member, just like the chute body 14a. When the extension chute 14b rotates to a storage position on the chute body 14a (see Figures 3 and 5), the fresh concrete in the drum 5 is discharged from the discharge end of the chute body 14a. On the other hand, when the extension chute 14b rotates downward to a maximum rotation position (see Figure 4) where it forms a passage with the chute body 14a, the fresh concrete in the drum 5 is discharged from the discharge end of the extension chute 14b. By using the extension chute 14b in this way, it is possible to extend the passage length of the discharge passage that discharges the fresh concrete in the drum 5.

As shown in Figures 1 to 3, the mixer vehicle 1 is provided with an operating lever 7 that controls the direction and speed of rotation of the drum 5, and the drum operation command signal of the operating lever 7 is sent to a control device (not shown). The operating levers 7 are provided on the left and right sides of the vehicle frame 2 in the vehicle width direction.

Next, we will explain the shot catch 30.

As shown in Figures 4 and 5, the chute catch 30 is composed of a lever member 31 that clamps and holds the tubular portion 21 of the adjuster 20, a spring 33 that biases the lever member 31 forward, and a bracket 35 for attaching these members to the drum stand 5a.

As shown in Figures 6 and 7, the bracket 35 includes a first bracket (base end bracket) 37 that is fixed to a vehicle body side plate 36 fixed to the right side of the drum frame 5a by fastening bolt B1, and a second bracket (tip bracket) 38 that is fixed to the first bracket 37 by fastening bolt B2. The above-mentioned lever member 31 and spring 33 are attached to the second bracket 38.

The lever member 31 is attached to the second bracket 38 via a shaft 34 extending in the left-right direction so that it can rotate back and forth. The lever member 31 is formed with a holding portion 31a consisting of an arcuate surface that opens upward, on the rear side from the portion supported by the shaft 34. In addition, a rod-shaped operating portion 32 is attached to the lower portion of the lever member 31.

The lever member 31 is provided so as to accommodate the tubular portion 21 of the adjuster 20 in the arc-shaped holding portion 31a when the chute 14 is facing almost sideways. As shown by the solid line in FIG. 7, the lever member 31 is biased clockwise around the shaft 34 by the spring 33, and the tubular portion 21 of the adjuster 20, which has entered the holding portion 31a due to the biasing force of the spring 33, is held in the holding portion 31a. In detail, the rear end of the second bracket 38 is formed with a holding portion 38d consisting of an arc surface that opens toward the rear, and the tubular portion 21 is sandwiched and held from the front to the back by the arc surface of the holding portion 31a and the arc surface of the holding portion 38d. In this way, by sandwiching the tubular portion 21 of the adjuster 20 by the lever member 31, the rotation of the chute 14 is restricted and it is held in the rotation position.

On the other hand, as shown by the two-dot chain line in Figure 7, by operating the rod-shaped operating part 32 upward against the biasing force of the spring 33, the lever member 31 rotates counterclockwise around the shaft 34, and the retention of the tube part 21 by the retaining part 31a is released. This makes it possible to rotate the chute 14 around the vertical part 15a.

As shown in Fig. 6, the vehicle body side plate 36 has a generally U-shaped cross section. As shown in Fig. 8, the vehicle body side plate 36 has a plurality of circular holes (bolt holes) 36a (eight in Fig. 8). A bolt B1 for fastening to the first bracket 37 is inserted through the round hole 36a. The hole diameter d1 of the round hole 36a is generally the same as the shaft diameter of the bolt B1.

As shown in Figs. 9 and 10, the first bracket 37 has at least a first surface 37a facing the vehicle body plate 36 and a second surface 37b facing the second bracket 38, with the first surface 37a and the second surface 37b being arranged substantially perpendicular to each other. As shown in Fig. 10, the first surface 37a of the first bracket 37 has a plurality of oval long holes (bolt holes) 37c (eight in Fig. 9). A bolt B1 for fastening to the vehicle body plate 36 is inserted into the long holes 37c.

The longitudinal width D1 and vertical width H1 of the long hole 37c are larger than the shaft diameter of the bolt B1. Since the long hole 37c has a longitudinal width D1 larger than the shaft diameter of the bolt B1, the first bracket 37 can be moved forward or backward relative to the vehicle side plate 36 to adjust its position by loosening the fastening of the bolt B1. This position adjustment allows the longitudinal positions of the arcuate surfaces of the retaining portion 31a and the retaining portion 38d to be changed.

The long holes 37c are provided at positions corresponding to the round holes 36a of the vehicle body side plate 36. In detail, each round hole 36a and each long hole 37c is formed so that the round hole 36a is located in the center of each long hole 37c when the vehicle body side plate 36 and the first surface 37a of the first bracket 37 are overlapped (butted) together.

As shown in FIG. 9, the second surface 37b of the first bracket 37 has an oval long hole (bolt hole) 37d formed on the upper side and a circular round hole (bolt hole) 37e formed on the lower side. A bolt B2 for fastening to the second bracket 38 is inserted through the long hole 37d and the round hole 37e. The left-right width D2 and the up-down width H2 of the long hole 37d are larger than the shaft diameter of the bolt B2. The hole diameter d2 of the round hole 37e is approximately the same as the shaft diameter of the bolt B2.

7 and 11, the second bracket 38 has at least a first surface 38a facing the second surface 37b of the first bracket 37. The first surface 38a is provided substantially perpendicular to the support portion 38b to which the lever member 31 and the spring 33 are attached. As shown in FIG. 11, the first surface 38a of the second bracket 38 has circular round holes (bolt holes) 38c arranged vertically (one each on the top and bottom in FIG. 11). A bolt B2 for fastening to the first bracket 37 is inserted into the round hole 38c. The hole diameter d3 of the round hole 38c is substantially the same as the shaft diameter of the bolt B2. The round hole 38c is provided at a position corresponding to the long hole 37d and the round hole 37e of the first bracket 37. In detail, the long hole 37d and the upper round hole 38c are formed so that the upper round hole 38c is located in the center of the long hole 37d when the second surface 37b of the first bracket 37 and the first surface 38a of the second bracket 38 are overlapped (butted) with each other. The round hole 37e and the lower round hole 38c are also formed so that the round hole 37e and the lower round hole 38c are aligned. As shown in FIG. 7, when the first bracket 37 and the second bracket 38 are connected, the second surface 37b of the first bracket 37 and the first surface 38a of the second bracket 38 extend toward the front side of the paper. As shown in FIG. 9, the long hole 37d of the first bracket 37 extends in the left-right direction.

The left-right width D2 and the up-down width H2 of the long hole 37d are formed to be larger than the shaft diameter of the bolt B2. In detail, the long hole 37d (left-right width D2 and up-down width H2) is large enough that the bolt B2 inserted in the upper round hole 38c does not interfere when the second bracket 38 is rotated left-right relative to the first bracket 37 around the bolt B2 inserted in the lower round hole 38c. Therefore, when the bolts B2 inserted in the upper and lower round holes 38c are loosened, the second bracket 38 can be rotated left-right relative to the first bracket 37 around the bolt B2 inserted in the lower round hole 38c to adjust the position in the left-right direction. This position adjustment allows the orientation of the arc surfaces of the holding portion 31a and the holding portion 38d (the mounting angle in the up-down direction) to be changed.

The vertical mounting angle of the chute catch 30 is adjusted so that the adjuster 20 (tubular portion 21) in a specified contracted position can be held by the surface contact of the holding portion 31a and the holding portion 38d. However, for example, dust or the like may get into the tubular portion 20a, and the adjuster 20 may not return to the specified contracted position. Also, looseness may occur in the rotating shaft 15 portion, the pin 15d portion, and the pin 20a portion, causing the adjuster 20 to lower and the inclination angle to change. In this state, even if the chute 14 is rotated to hold the tubular portion 21 with the holding portion 31a and the holding portion 38d, the inclination angle of the tubular portion 21 may not fit because it is misaligned with the mounting angle of the holding portion 31a and the holding portion 38d.

According to this embodiment, the left-right position adjustment (rotation adjustment) can be performed between the first bracket 37 and the second bracket 38 by utilizing the left-right long hole (long hole 37d of the first bracket 37) that is the left-right adjustment part. This allows the vertical mounting angle of the holding part 31a and the holding part 38d to be adjusted to match the inclination angle of the tube part 21. Therefore, even with the simple configuration of providing a long hole and a round hole in the mixer vehicle 1, the adjuster 20 can be securely fitted and held in the chute catch 30 even if the adjuster 20 does not return to the specified retracted position.

In detail, when the first bracket 37 and the second bracket 38 are fastened by the bolt B2, the long hole 37d of the first bracket 37 is used to adjust the position in the left-right direction. In this case, the bolt B2 can move left-right in the long hole 37d, but the bolt cannot move in the round hole 37e. The second bracket 38 can be rotated left-right relative to the first bracket 37 around the bolt inserted in the round hole 37e, and the mounting angle of the second bracket 38 (holding portion 31a and holding portion 38d) can be matched with the inclination angle of the tube portion 21. Therefore, even if the adjuster 20 does not return to the specified reduced position, the arc surfaces of the holding portion 31a and holding portion 38d can be brought into surface contact with each other to reliably hold the adjuster 20.

In addition, the long hole in the fore-aft direction (long hole 37c of first bracket 37), which is the fore-aft adjustment part, can be used to adjust the fore-aft position of first bracket 37 relative to vehicle body plate 36. This allows the fore-aft position adjustment of holding part 31a and holding part 38d.

In detail, when the vehicle body side plate 36 and the first bracket 37 are fastened with the bolt B1, the first bracket 37 can be moved in the front-rear direction by using the long hole 37c of the first bracket 37. For example, if it is difficult to rotate the chute 14 almost to the side due to deterioration over time, the adjuster 20 can be securely held by the surface contact of the holding portion 31a and the holding portion 38d by sliding the first bracket 37 rearward relative to the vehicle body side plate 36.

In the case of the conventional configuration described above, as shown in FIG. 14, for example, bracket 538 has round hole 538a instead of elongated hole, which makes it difficult to adjust the position when fastening the bolt. In contrast, in this embodiment, as described above, by utilizing elongated holes 37c and 37d provided in first bracket 37, it is possible to easily adjust the position in the front-rear direction and the left-right direction when fastening the bolt.

This allows the positions of the holding portion 31a and the holding portion 38d to be adjusted to match the rotational position of the chute 14 and the contracted position of the adjuster 20. Therefore, even with a simple configuration of providing long holes 37c and 37d, the adjuster 20 can be securely held by the chute catch 30.

The present invention can be embodied in various other forms without departing from its spirit, purpose, or main features. Therefore, the above-described embodiments are merely illustrative in all respects and should not be interpreted as being limiting. The scope of the present invention is defined by the claims and is not limited in any way by the text of the specification. Furthermore, all modifications and changes within the equivalent scope of the claims are within the scope of the present invention.

The first modified example shown in FIG. 12 will be described. In the above embodiment, the longitudinal position adjustment can be performed between the vehicle body plate 36 and the first bracket 37 by using the longitudinal long hole (long hole 37c on the first surface 37a of the first bracket 37) which is the longitudinal adjustment part. In addition, the longitudinal position adjustment can be performed between the first bracket 37 and the second bracket 38 by using the lateral long hole (long hole 37d on the second surface 37b of the first bracket 37) which is the lateral adjustment part.

As shown in FIG. 12, instead of the long hole 37c of the first bracket 37 in the above embodiment, a long hole 137g extending in the front-rear direction may be provided in the second surface 137b of the first bracket 137 as a long hole in the front-rear direction that serves as the front-rear adjustment portion, so that the position in the front-rear direction can be adjusted between the first bracket 137 and the second bracket 138. The lever member 31 is attached to the second bracket 138. A round hole 138c is formed in the first surface 138a of the second bracket 138, through which a bolt for fastening to the first bracket 137 is inserted.

In addition, instead of the long hole 37d of the first bracket 37 in the above embodiment, a long hole (upper long hole) 136b extending in the left-right direction may be provided in the vehicle body side plate 136 as a long hole in the left-right direction that serves as the left-right adjustment portion, so that the position in the left-right direction can be adjusted between the vehicle body side plate 136 and the first bracket 137. In this case, a round hole 136a is provided below the long hole 136b of the vehicle body side plate 136, and round holes 137f are provided in a vertical line on the first surface 137a of the first bracket 137.

Modification 2 shown in Fig. 13 will be described. In Modification 2 shown in Fig. 13, the second bracket 38 of the above embodiment is integrally formed with the first bracket 237. As shown in Fig. 13, as in Modification 1, a long hole 236b extending in the left-right direction may be provided in the vehicle body side plate 236 as a long hole in the left-right direction that serves as the left-right adjustment part, allowing left-right position adjustment between the vehicle body side plate 236 and the first bracket 237. Note that the lower hole of the long hole 236b is a round hole 236a.

In addition, the left-right adjustment section may be configured to sandwich a spacer 239 between the vehicle body plate 236 and the first bracket 237, and the thickness t of the spacer 239 may be adjusted to adjust the front-rear position between the vehicle body plate 236 and the first bracket 237. Note that instead of the spacer 239, a ring member may be used, for example, and the axial length of the ring member may be adjusted to adjust the front-rear position of the first bracket 237. This makes it possible to reduce the weight of the parts compared to when the spacer 239 is used. In this case, the spacer 239 is also provided with a round hole 239a, and the first surface 237a of the first bracket 237 is provided with a round hole 237f. However, the second surface 237b of the first bracket 237 does not have a round hole or a long hole. Note that the lever member 31 is attached to the second surface 237b of the first bracket 237.

Here, a vertical adjustment unit may be added to adjust the vertical position of the holding portion 31a and the holding portion 38d of the chute catch 30. In the above embodiment, for example, the upper round hole 36a of the vehicle body side plate 36 can be changed to a long hole extending in the vertical direction to configure the vertical adjustment unit. This vertical adjustment unit makes it possible to adjust the vertical position between the vehicle body side plate 36 and the first bracket 37 in addition to the front-rear position adjustment of the above embodiment. When the adjuster 20 is held in an oblique state, the vehicle body side plate 36 is attached to the drum frame 5a in an obliquely inclined state in response to the inclination of the adjuster 20. In this way, the holding portion 31a and the holding portion 38d can be moved up and down along the inclination of the vehicle body side plate 36 by the vertical adjustment unit. Therefore, when adjusting the position of the holding portion 31a and the holding portion 38d to match the inclination angle of the adjuster 20, the adjustment amount by the left-right adjustment unit can be kept small. On the other hand, when the adjuster 20 is held in a substantially horizontal state, the vehicle body side plate 36 (the mounting surface for the first bracket 37) can be attached to the drum frame 5a in a vertical state, so that the amount of adjustment by the left and right adjustment parts can be kept small, just as when the adjuster 20 is held in an oblique state.

In addition, a chute body with a different longitudinal length may be used instead of the chute body 14a, and the inclination angle of the adjuster 20 may be changed depending on the chute body used. However, even in such cases, this can be easily accommodated by adding vertical position adjustment, and the adjuster 20 can be securely held in the chute catch 30.

In the above embodiment, a case was described in which only one long hole was provided as the left-right adjustment portion, but two or more long holes may be provided as the left-right adjustment portion. For example, long holes 37d may be provided at the top and bottom of the second surface 37b of the second bracket 37 in the above embodiment (see FIG. 9). Also, in the second surface 37b of the first bracket 37, the upper hole may be a round hole and the lower hole a long hole to form the left-right adjustment portion. Furthermore, a long hole as the left-right adjustment portion may be provided in the first surface 38a of the second bracket 38.

In the above embodiment, the chute catch 30 is attached to the right side of the drum stand 5a, but the same effect can be obtained by attaching it to the left side of the drum stand 5a or to both the left and right sides. Also, in the above embodiment, the chute 14 is held in a state facing almost straight to the side, but the chute catch 30 may be used to hold it in a rotation position shifted forward or backward from straight to the side.

The present invention can be used in a mixer vehicle equipped with a chute that can rotate around a rotation axis that extends vertically relative to the vehicle body, and a chute catch that holds the chute in a predetermined rotation position.

1 Mixer vehicle 5a Drum stand (vehicle body)
14 Chute 14a Chute body 15 Rotation shaft 20 Adjuster 30 Chute catch 31a Holding portion 35 Bracket 37 First bracket (base end bracket)
37c long hole (front/rear adjustment part)
37d long hole (left and right adjustment part)
38 Second bracket (tip bracket)
38d holding part

Claims (4)

A mixer vehicle having a chute that can rotate around a rotation axis that extends vertically relative to a vehicle body, and a chute catch that holds the chute at a predetermined rotation position,
The chute includes a chute body pivotally connected to the rotating shaft to change the inclination angle in the vertical direction, and an adjuster pivotally connected to the rotating shaft and the chute body, and expands and contracts in response to the inclination of the chute body to change the inclination angle in the vertical direction,
The chute catch is characterized in that it comprises a bracket attached to the vehicle body, a holding portion provided on the bracket and abutting against the adjuster to hold the adjuster, and a left-right adjustment portion that rotates the holding portion in the left-right direction, which is the vehicle width direction of the vehicle body, to adjust the position in the left- right direction. The mixer vehicle according to claim 1,
the bracket includes a base end bracket attached to the vehicle body, and a tip end bracket provided with the holding portion and attached to the base end bracket by bolt fastening,
The left-right adjustment portion is a long hole for fastening a bolt provided in at least one of the base end bracket and the tip end bracket,
A mixer truck, wherein the long hole is formed so as to extend in the left- right direction. The mixer vehicle according to claim 1 or 2,
The mixer truck is characterized in that the chute catch is provided with a front-rear adjustment portion that adjusts the position of the holding portion in the front-rear direction. The mixer vehicle according to any one of claims 1 to 3,
The mixer truck is characterized in that the chute catch is provided with a vertical adjustment portion that adjusts the vertical position of the holding portion.

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