JP3916369B2 - Mixer car chute fixing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chute fixing device that can fix a chute disposed at a rear portion of a mixer vehicle at an arbitrary turning position.
[0002]
[Prior art]
As a conventional mixer vehicle chute fixing device, a structure disclosed in Japanese Utility Model Registration No. 2547709 is known.
That is, a circular fixed plate is fixed to the mixer frame, and a pivot plate integral with a support shaft supporting the chute is rotatably superimposed on the fixed plate. Further, one end of a U-shaped support member is pivotally supported on the swivel plate via a bracket, and the other end of the support member is disposed so as to extend below the fixed plate. A screw member is screwed onto the other end of the support member, and when the screw member is rotated, the tip of the screw member comes into contact with the lower surface of the fixed plate. When the screw member is further rotated, the support plate is pulled downward, so that the swivel plate is also pulled downward. At the same time, the fixed plate is pushed upward by the screw member, and the fixed plate and the swivel plate come into contact with each other. The turning of the chute is regulated by increasing the frictional resistance.
[0003]
[Problems to be solved by the invention]
By the way, in the above configuration, the turning is controlled by the frictional resistance generated by bringing the upper surface of the fixed plate and the lower surface of the swivel plate into contact with each other. If so, there are various problems.
In other words, if there is a gap between the fixed plate and the swivel plate at the position where the screw member is pressed, it is difficult to eliminate the gap between the two plates even if the screw member is pushed in. Rotation regulation is insufficient.
On the other hand, if it is attempted to eliminate the gap between the two plates, it is necessary to rotate the screw member with a very large force.
Accordingly, the present invention provides a chute fixing device for a mixer truck that can reliably control turning with little effort.
[0004]
[Means for Solving the Problems]
In the present invention, to secure the fixing stand to a mounting member extending from claims 1, vehicle body, the strut so that piling pivotable swivel base struts side for supporting the chute on said fixing base, wherein the swivel slide is A bolt member or notch groove penetrating in the vertical direction is formed, and a bolt member whose tip can be brought into contact with the upper surface of the fixed base by entering the hole or notch groove is supported by a support base fixed on the swivel base. and, wherein the bolt threaded portion formed on member screwed part of the pressing member having one end opposed to the lower surface of the fixing table, on a fixed base by the pressing member is raised and lowered by the rotation of the bolt member The lower surface is clamped by the tip of the bolt member and one end of the pressing member to restrict the turning of the chute.
[0005]
Thus, when restricting the turning of the chute, the upper and lower surfaces of the fixed base can be pressed simultaneously, so that the turning of the chute can be restricted regardless of the deformation of the fixed base or the rotating base.
According to a second aspect of the present invention, a plurality of notch grooves are formed on the outer periphery of the fixed base, and a lever that can be engaged with and disengaged from the notch groove is pivotally supported on the swivel base.
Thereby, the turning of the chute can be restricted by the clamping force between the bolt member and the pressing member at an arbitrary position, and the turning of the chute can be surely restricted by the lever at the predetermined position.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall view relating to a chute located at the rear of the mixer truck. Reference numeral 1 denotes a mounting column extending from the vehicle body 2 of the mixer vehicle. A short tube 3 is fixed to the tip of the mounting column 1, and a disk-shaped fixing base 4 is fixed to the upper portion of the short tube 3. A support column 5 is passed through the short tube 3 and the fixed base 4. In the middle of the support column 5, a disc-shaped swivel base 6 that is positioned above the fixed table 4 and has substantially the same shape as the fixed table 4 is fixed, and the upper end of the chute 7 is pivotally supported on the upper end of the support column 5. The chute 7 can be swung up and down, and a connecting member 8 is fixed to the lower part of the column 5 protruding below the short tube 3 with a pin 9, and the chute 7 is interposed between the connecting member 8 and the lower part of the chute 7. A chute tilt holding device 10 is provided for holding the chute 7 in a predetermined position after the bar is swung up and down. The chute tilt holding device 10 is provided with a pin 12 on an expansion / contraction member 11, and the pin 12 is inserted and fixed when the expansion / contraction member 11 extends to a predetermined length. Reference numeral 13 denotes a reinforcing bracket provided between the support column 5 and the swivel base 6.
[0007]
Reference numeral 14 denotes a chute fixing device for fixing the chute 7 at a predetermined turning position. The chute fixing device 14 includes a main lock device 15 capable of restricting turning at an arbitrary position and an auxiliary lock device 16 capable of ensuring turning restriction even with a large external force.
The main lock device 15 and the auxiliary lock device 16 are provided on the swivel base 6, and the auxiliary lock device 16 is disposed radially from the center of the column 5 as shown in FIG. Are arranged in parallel.
[0008]
The main lock device 15 will be described with reference to FIGS. 2 and 6. A support base 17 having a U-shaped cross section is fixed on the swivel base 6, and the upper plate portion 17 a and the lower plate portion 17 b of the support base 17 have the same vertical position. A hole 18 is formed on each line, and an end of the lower plate portion 17b protrudes from the outer periphery of the swivel base 6 and a rectangular engagement groove 19 is formed.
Bolt members 20 are passed through both holes 18 of the support base 17, and the bolt members 20 are formed with screw portions 20 a and 20 b at the lower and upper portions, and enormous portions 20 c are formed at the intermediate portions, and the upper surface of the enormous portion 20 c. A plurality of radially extending protrusions 20d are continuously formed. The lower end of the bolt member 20 enters a hole 21 formed in the swivel base 6 and comes into contact with the upper surface of the fixed base 4. On the other hand, the upper threaded portion 20b of the bolt member 20 has a rotating member 22 having a protrusion 20d similar to the enlarging portion 20c formed on the lower surface, and is superimposed on the enlarging portion 20c. Are integrated. Further, a nut 24 is disposed above the rotating member 22, and the nut 24 is screwed into the upper screw portion 20 b and tightened to press the rotating member 22 against the enormous portion 20 c, thereby operating the handle 23 to the bolt member 20. It is to be transmitted. When the tip of the bolt member 20 is worn, the operation start position of the handle 23 is shifted. At this time, the nut 24 is loosened, and the protrusion 20d of the rotating member 22 is shifted with respect to the enormous portion 20c. The operation start position of the handle 23 can be easily corrected.
[0009]
The support base 17 is provided with a pressing member 25 disposed so as to sandwich the fixed base 4 and the swivel base 6, and the upper projecting portion 25 a of the pressing member 25 is formed by upper and lower plate portions 17 a, 17b and is screwed into the lower screw portion 20a of the bolt member 20. A lower projecting portion 25b of the pressing member 25 is located below the fixed base 4, and a contact portion 25c that is somewhat raised on the substantially same line as the bolt member 20 is formed. On the other hand, the vertical portion 25d of the pressing member 25 is fitted into the engaging groove 19 of the support base 17, and restricts the pressing member 25 from swinging left and right.
[0010]
Next, the auxiliary lock device 16 will be described with reference to FIGS. 2 and 5. Reference numeral 26 denotes a pair of brackets standing in parallel on the swivel base 6. One end of a lever 27 is pivotally supported between the pair of brackets 26. The lever 27 can be turned up and down. An engaging portion 27a is formed at an intermediate portion of the lever 27. When the lever 27 rotates downward, the engaging portion 27a enters the notch portion 6a of the swivel base 6 and the notch groove 28 of the fixed base 4, and the lever 27 is It engages with the notch groove 28, and can control that the swivel base 6 turns with respect to the fixed base 4 (a dashed-dotted line in FIG. 5). Further, when the lever 27 is rotated upward, the engaging portion 27a of the lever 27 is disengaged from the notch groove 28, so that the swivel base 6 can freely turn (solid line in FIG. 5). By the way, a plurality of the cutout grooves 28 of the fixed base 4 are formed at predetermined intervals within a range of 180 degrees or more. Therefore, if the lever 27 coincides with the position of the cutout groove 28 at the chute 7 turning stop position. The swivel base 6 can be fixed by operating the lever 27.
[0011]
In the embodiment, the chute fixing device is formed by the main lock device and the auxiliary lock device. However, even if the chute fixing device is formed only by the main lock device, the same effect can be obtained. In addition, instead of the abutting portion formed on the lower overhanging portion of the pressing member, a part of the lower overhanging portion is brought into direct contact with the lower surface of the fixing base, or a bolt is screwed into the underhanging portion instead of the abutting portion. In addition, when the tip of the bolt is worn by contact with the fixed base, the bolt can be screwed and adjusted. Moreover, it is also possible to make a notch groove instead of the hole into which the bolt member of the swivel base can be inserted.
[0012]
The present invention is constructed as described above, and the operation will be described next.
When the mixer vehicle travels, vibrations or turning during running causes shaking, inertial force, etc., and the chute 7 tends to turn due to the inertial force, etc., so the lever 27 of the auxiliary lock device 16 is turned downward. As shown in FIG. 5, the engaging portion 27a of the lever 27 is engaged with the notch groove 28 of the fixing base 4 so that the chute 7 is securely fixed. At that time, the main lock device 15 can also be operated to be in a fixed state.
[0013]
When arriving at the work site and turning the chute 7, the lever 27 is rotated upward to the solid line position in FIG. 5 to release the engagement with the fixed base 4. In this state, the chute 7 is manually turned to a predetermined discharge position and stopped. In order to prevent the chute 7 from swinging during discharging at the stopped position, the handle 23 of the main lock device 15 is operated to raise the pressing member 25 from the position of the dashed line in FIG. The contact portion 25 c of the member 25 is pressed against the lower surface of the fixed base 4. As a result, the fixed base 4 is clamped from above and below by the abutting portion 25c and the lower end of the bolt member 20, thereby increasing the frictional resistance and restricting the turning of the chute 7. Since the swing of the chute 7 during discharge is a small force, turning control is possible only by the frictional resistance of the main locking device 15, but the stopped position is a position where the lever 27 and the notch groove 28 coincide. In addition, the turning may be restricted by the auxiliary lock device 16. That is, if the main lock device 15 is used, it is possible to restrict the turning at an arbitrary position without being limited to the position of the notch groove 28, so that the selection of the discharge position of the chute 7 becomes very easy.
[0014]
【The invention's effect】
As described above, according to the first aspect of the present invention, the bolt member is provided on the swivel base side, the tip of the bolt member is brought into contact with the upper surface of the fixed base, and the pressing member is screwed to the bolt member to operate the bolt member. As a result, the pressing member moves up and down and a part of the pressing member comes into contact with the lower surface of the fixing base, and the turning of the chute is restricted by pressing the fixing base from above and below with the bolt member and the pressing member. Further, the turning restriction position can be arbitrarily selected, and turning restriction can be reliably performed even if the fixed base or the turning base is deformed.
[0015]
According to a second aspect of the present invention, a plurality of notch grooves are formed on the outer periphery of the fixed base, while a lever is pivotally supported on the swivel base, and the turning of the chute is restricted by engaging the lever with the notch groove. Therefore, even if a large external force is applied, the turning can be reliably controlled. Further, the operation of the bolt member and the operation of the lever can be selectively used according to the chute stop position, so that the operability is improved, and further more reliable turning regulation is possible by operating them simultaneously.
[Brief description of the drawings]
FIG. 1 is an overall view of a chute equipped with the present invention.
2 is an AA enlarged cross-sectional view of FIG.
FIG. 3 is an enlarged cross-sectional view taken along the line BB of FIG.
4 is an enlarged cross-sectional view taken along the line CC of FIG. 1;
5 is a cross-sectional view taken along the line DD of FIG.
6 is a cross-sectional view taken along the line E-E in FIG. 2;
7 is a cross-sectional view taken along line FF in FIG.
[Explanation of symbols]
Reference Signs List 4 Fixing stand 5 Support 6 Swivel stand 7 Chute 14 Chute fixing device 15 Main lock device 16 Auxiliary lock device 17 Support stand 26 Bracket 20 Bolt member 23 Handle 25 Pushing member 27 Lever 28 Notch groove

Claims (2)

A fixed base is fixed to a mounting member extending from the vehicle body side, and a support-side swivel base that supports a chute is superimposed on the fixed base so that the support can turn, and a hole or notch penetrating in the vertical direction is formed in the swivel base. A bolt member is formed on the swivel base and supported by a support base fixed on the swivel base. A part of the pressing member whose one end faces the lower surface of the fixing base is screwed into the screw portion, and the pressing member moves up and down by rotation of the bolt member, so that the upper and lower surfaces of the fixing base are pressed against the tip of the bolt member. A chute fixing device for a mixer truck, characterized in that the chute is restricted by clamping with one end of a member. 2. A chute fixing device for a mixer truck according to claim 1, wherein a plurality of notch grooves are formed on the outer periphery of the fixing base, and a lever that can be engaged with and disengaged from the notching groove is rotatably supported on the swivel base. .

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