JPH10264716A - Device for opening and closing hopper lid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of freely opening and closing the lid of a concrete mixer or other hopper even in a small space by making as small as possible the spaces required to open and close the lid of the hopper upward and to each side. SOLUTION: This device for opening and closing a hopper lid includes a lid 19 mounted on a vehicle and formed to cover the opening 14a of a hopper 14 which is open at its top; a pair of guide rails 16 passing alongside the hopper 14 and placed on the vehicle while being curved downwards from behind the hopper 14; a pair of chains loosely fitted into the guide rails 16; a motor 20 capable of transferring the chains in a reciprocating direction; and a connector 18 connecting the lid 19 to the chains in such a manner that the track of the lid 19 becomes longer than those of the chains.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for opening and closing a lid for covering an opening of a hopper arranged in a vehicle such as a concrete mixer truck.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view of a conventional concrete mixer truck viewed from the rear. The concrete mixer truck 50 includes a concrete mixer 51 for mixing ready-mixed concrete therein, and a concrete mixer 5.
Hopper 52 for pouring ready-mixed concrete or the like into 1
And a discharge pipe 53 for guiding the mixed ready-mixed concrete discharged from the concrete mixer 51 in a predetermined direction.

Since the hopper 52 is open upward, if the hopper 52 is left open, wood chips, leaves, vinyl, and other foreign substances enter the hopper 52 and enter the concrete mixer 51. It is easy to mix into the poured ready-mixed concrete, and it is easy to cause deterioration in the quality and strength of the concrete. Therefore, normally, a sheet is placed over the opening 52a of the hopper 52 to prevent foreign matter from entering.

Alternatively, as shown in FIG. 6, a lid 54 is pivotally mounted on the hopper 52, and the lid 54 is moved in the front-rear direction (directions of arrows B and C) of the concrete mixer truck 50 around one end 54a. The hopper 52
Is opened and closed (the trajectory of the lid 52 is indicated by a broken line). Alternatively, the lid 54
Mixer truck 5 centered on the other end 54b of the car
In some cases, the lid 54 is turned in the front-rear direction (not shown).

A lid 54 of the concrete mixer truck 50 is pivotally attached to a hopper 52 so as to turn around a one end (not shown) in a horizontal plane (a plane extending in a direction perpendicular to the plane of FIG. 6). In some cases, the opening 52a of the hopper 52 is opened and closed (not shown).

[0006]

However, when the cover 54 of the concrete mixer 51 is turned in the direction of arrow B or C, or when it is turned in the horizontal plane, The turning of the lid 54 requires a certain space around the concrete mixer truck 50. That is, when the lid 54 is the arrow B or C
When turning in the direction, etc., use a concrete mixer truck 5
In order to turn the lid 54 above 0, an arc-shaped space having a radius from one end 54a to the other end 54b is required, and when the lid 4 turns in the horizontal direction, An arc-shaped space having a radius from one end (not shown) to the other end (not shown) is required on the left (or right) side of the mixer truck.

[0007] For this reason, in a narrow construction site or the like, a space for opening and closing the lid attached to the hopper cannot be secured above and right and left of the concrete car, which may cause a problem. If the opening of the hopper is left open as in the prior art to avoid this problem, it is not possible to prevent foreign substances from entering the inside of the hopper as described above.

The present invention has been made in view of the above-mentioned problems of a hopper provided in a conventional concrete mixer truck, and is directed upward or to both sides of a vehicle, which is required for opening and closing a lid of the hopper. It is an object of the present invention to provide a device capable of freely opening and closing the lid of a concrete mixer or other hopper even in a narrow place, while minimizing the space of the hopper.

[0009]

In order to achieve the above object, an opening / closing device for a hopper lid according to the present invention is arranged in a vehicle and covers an opening of a hopper having an upper opening. And means for moving the lid so as to open and close the opening of the hopper.

In the opening / closing device for a lid for a hopper according to the present invention, the lid is preferably formed so as to cover an edge of the opening of the hopper disposed at a rear portion of a concrete mixer truck. The means for moving the lid so as to open and close the opening of the hopper passes through the side of the hopper, and is curved downward from the rear of the hopper to below the concrete mixer truck. The concrete mixer truck is provided with a pair of guide rails, and means for moving the lid along the guide rails.

In the hopper lid opening / closing device according to the present invention, preferably, the means for moving the lid along the guide rails comprises a pair of chains loosely fitted to the pair of guide rails. And a chain driving device that can transfer the chain in a reciprocating direction, and a connecting member that connects the lid and the chain.

Further, in the opening / closing device for a hopper lid according to the present invention, preferably, the connecting member is configured such that when the lid is run to open and close the opening of the hopper, the lid is closed. The chain and the lid are connected at a predetermined interval so that the trajectory of the chain is longer than the trajectory of the chain.

Further, in the hopper cover opening / closing device according to the present invention, preferably, a stopping means for stopping travel of the cover at a predetermined position is provided on the guide rail.

In the opening and closing device for a hopper lid according to the present invention, preferably, the means for restraining the lid is configured to contact the connecting portion when the lid closes and opens the opening of the hopper. It is a locking member to be in contact with.

In the hopper lid opening / closing device according to the present invention, preferably, the locking member is a limit switch for stopping the operation of the chain driving device when the connecting portion comes into contact with the lid. It is a feature.

Further, in the hopper lid opening / closing device according to the present invention, the lid is preferably made of synthetic resin.

Further, the hopper cover opening / closing device according to the present invention is preferably characterized in that a cover made of an elastic body is attached to a peripheral portion of the cover.

In the opening / closing device for a hopper lid according to the present invention, preferably, a vinyl sheet is provided on a side portion of the lid, and the opening of the hopper is opened from above the hopper when the lid is open. It is characterized by being provided so as to surround the side surface.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a hopper lid opening / closing device according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a hopper lid opening / closing device according to the present invention, FIG. 2 is a diagram showing details of the present embodiment, (a) is a partial view of a guide rail, b) is (a)
A-A cross-sectional view, (c) is a cross-sectional view similar to (b) of the guide rail showing the connecting state of the connecting tool, (d) is a perspective view showing a state where a vinyl sheet is attached to the lid, FIG. 3 is a perspective view showing a state in which the opening / closing device for the hopper lid according to the present embodiment is arranged in a concrete mixer truck, and FIG. 4 shows a running state of the lid of the hopper lid device according to the present embodiment. (A) is a state where the hopper is closed, (b) is a state where the hopper is being opened or closed,
(c) shows the open state of the hopper.

[0020] Chassis 1 of concrete mixer truck 10
1, an iron frame 13 is attached to the rear of the concrete mixer 12 by bolts or other removable fastening means, and a hopper 14 having an upper opening is attached to the frame 13 on the frame 13. ing. An iron plate cover 15 is attached to the opening 14a of the hopper 14 at a part of the left and right edges and at the front edge. Note that the cover 15 may be made of plastic.

The opening / closing device for the hopper lid according to the present embodiment is disposed around the hopper 14 disposed at the rear of the concrete mixer truck 10 as described above. Guide rails 16 made of stainless steel are arranged in pairs on the left and right sides of the hopper 14, respectively, and are fixed to the frame 13 via fixing means such as a frame and bolts, not shown. The guide rail 16 is connected to the hopper 14 in the front-rear direction of the concrete mixer truck 10.
Of the concrete mixer truck 10 and a curved portion 16b which extends in a curved manner toward the lower rear portion of the concrete mixer truck 10.

The guide rail 16 has a substantially box-shaped cross section, and houses therein a roller chain 17 so as to be able to run. The guide rail 16 has a groove 16c communicating from the inside to the outside along the longitudinal direction.

As shown in FIG. 2C, the roller chain 17 is connected to a lid 19 via a connecting member 18. The connecting tool 18 includes, for example, an attachment 18a,
One end (attachment 18a) is fixed to the roller link 17a of the roller chain 17 through the groove 16c of the guide rail 16, and the other end (arm 18c). Is fixed to the side of the lid 19. In addition, the connecting member 18 arranges the lid 19 and the roller chain 17 such that the trajectory of the lid 19 is longer than the trajectory of the roller chain 17 (in this embodiment, the lid is placed above the roller chain 17). To) and connected. In addition, the connecting tool 18 is, for example,
A contact portion 18d to be brought into contact with a limiter described later is provided. The connecting tool 18 is not necessarily limited to the configuration and mode as shown in FIG. 2 (c). The connecting tool 18 connects the roller chain 17 and the lid 19 so as to be able to travel along the guide rail 16, and Any configuration and mode may be used as long as they can contact the limiter.

A motor 20 is attached to the end of each guide rail 16 so that the roller chain 17 can be transported in a reciprocating direction via a gear or the like (not shown). Chain 1
7, the connecting member 18 and the lid 19 can be moved along the guide rail 16. In addition, each guide rail 16 is provided with an extension 16 d, and the length of each guide rail 16 is longer than the moving distance of the roller chain 17 that is operated to open and close the lid 19. This is preferable because the roller chain 17 sent forward by the motor 20 does not protrude to the outside. Further, it is preferable to form the extension 16d so as to be curved downward, because the installation space can be made compact.

Also, the straight portion 16a of each guide rail 16
The limiters 21 and 22 are disposed on the bending portion 16b, and the locking portions 21a and 22a are provided on the limiters 21 and 22.
When the lid 19, which is made to travel along the guide rail 16, reaches a position where the lid 19 opens and closes the opening 14 a of the hopper 14, the contact portion of the connecting tool 18 is provided. 18d is brought into contact with the cover 1
9 is stopped in the opening and closing directions. When the contact portions 18d of the connecting member 18 come into contact with the locking portions 21a and 22a of the limiters 21 and 22,
Is configured as a limit switch that acts to turn off the power of the motor 20, the connecting member 18, and the limiter 21 after the contact as described above and before the operation of the motor 20 is stopped by a manual switch. , 22
Since no extra force is required, the operation is convenient and the life of the connecting member 18 and the limiters 21 and 22 can be extended.

The lid 19 is made of synthetic resin such as vinyl chloride.
It is made of a plate-like member formed and shaped according to the shape and size of the opening 14a of the hopper 14, and can cover the edge of the opening 14a of the hopper 14, and has excellent corrosion resistance and rust prevention. The effect, lightness and strength can be ensured. A cover 23 formed by using an elastic body such as rubber is provided on a peripheral portion of the lid 19.
a and 23b are attached, so that the lid 19 can improve the airtightness when the opening 14a of the hopper 14 is closed, and can also function to buffer the lid 19, the hopper 14 and the cover 15. Has become.

As shown in FIG. 2 (d), the vinyl sheet 24 is covered with a cover 19 via a bar-shaped member 25 such as an iron bar.
When the cover 19 is opened, the side surface can be covered from above the hopper 14 to the opening 14a of the hopper 14 by attaching the cover 19 to the side of the cover rubber 20b attached to the peripheral portion of the hopper 14. This is preferable because when the ready-mixed concrete is poured into the hopper 14, the ready-mixed concrete can be prevented from scattering from the hopper 14 to the outside. In addition, vinyl sheet 24
It is preferable that the material be transparent, since the state of pouring into the hopper 14 can be observed from the outside.

In addition, a switch for operating the motor 20 and a display lamp (not shown) for displaying ON / OFF of the motor 20 are provided in the driver's cab 26 so that the vehicle can be driven regardless of whether the vehicle is running or stopped. The lid 19 can be opened and closed while staying in the chamber 26.

According to the opening / closing device for a hopper lid of the present embodiment configured as described above, as shown in FIG. 4A, the operation is performed with the lid 19 covering the opening 14a of the hopper 14. When the motor 20 is rotated forward by a predetermined switch provided in the chamber 26, the roller chain 17
Is moved rearward along the guide rail 16.
Along with this, the contact portion 18d of the connecting member 18 connected to the roller chain 17 is
The connector 18 is caused to travel along the opening surface of the hopper 14 until the rear end of the opening 14a starts from the position where it abuts on the locking portion 21a (FIG. 4 (b)). The driver can run while changing direction in an arc downward.

When the lid 19 is moved to the position as shown in FIG. 4C, the contact portion 18d of the connecting member 18 comes into contact with the locking portion 22a of the limiter 22, and the lid 19 is further moved.
Is stopped, the switching mechanism operates so that the locking portion 22a turns off the power of the motor 20, and the motor 20 stops operating. At this time, the opening 14a of the hopper 14 is almost fully opened, and the fresh concrete or the like is poured from above the hopper 14 and FIG.
Can be sent to the mixer 12 as shown in FIG.
In addition, as shown in FIG. 2 (d), if the transparent vinyl sheet 24 is attached, when the fresh concrete is poured into the hopper 14, the splash of the fresh concrete hitting the hopper 14 hits the transparent vinyl sheet.
It is possible to prevent the ready-mixed concrete from scattering outside the hopper 14.

Conversely, when the hopper 14 is closed and the motor 20 is rotated in reverse by the predetermined switch provided in the cab 26, the lid 19
It is made to travel upward through the roller chain 17, and then changes its direction in an arc (FIG. 4).
(b)), the vehicle is driven forward along the opening surface of the hopper 14. When the lid 19 is moved to the position shown in FIG. 4 (a), the contact portion 18d of the connecting member 18 comes into contact with the locking portion 21a of the limiter 21 to stop further movement of the lid 19. At the same time, the switching mechanism works so that the locking portion 21a turns off the power of the motor 20, and the motor 20 stops rotating. At this time, the opening 14 a of the hopper 14 is closed by the lid 19. The lid 19 is connected to the opening 1 of the hopper 14.
4a is closed, the rubber covers 23a, 2
Since the opening 3a can substantially seal the opening 14a of the hopper 14, it is possible to prevent the contents inside the hopper 14 from scattering to the outside of the hopper 14.

The open / close state of the lid 19 can be confirmed by the blinking of the indicator lamp provided in the cab 26. Further, if the switch for operating the motor 20 is turned ON / OFF independently of the control by the limiter, the cover 19 can be freely adjusted to a state during opening and closing.

The opening / closing device for the hopper lid according to the present embodiment operates as described above, and moves in the front-rear direction of the vehicle along the guide rail 16 provided on the side of the hopper 14.
9, the traveling direction was changed downward in an arc while keeping the distance from the guide rail 16 constant, and the lid 19 was moved in the left-right direction of the vehicle body. Without the need for space
Also, in the vertical direction, if the connecting portion 18 is attached to the front of the center of the side of the lid 19, the space above can be suppressed, and if the connecting portion 18 is attached to the back of the center of the side of the lid 19, The space to the rear can be reduced. In addition, as shown in FIG. 4, if the connecting portion 18 is attached to substantially the center of the side of the lid 19, the lid 19 can be moved upward and rearward.
The space required for moving can be reduced by about half.

In the hopper cover opening / closing device according to the present embodiment, the cover 19 and the roller chain 17 are connected so that the trajectory of the cover 19 is longer than the trajectory of the roller chain 17. Opening 1 of hopper 14
The guide rail 16 can be positioned below 4a, so that the guide rail 16 does not obstruct the work of pouring cement or the like from the opening 14a of the hopper 14. In addition, if the roller chain 17 and the lid 19 are connected so as to increase the interval, the length of the guide rail 16 can be shortened accordingly.

[0035]

As described above, according to the lid device for a hopper according to the present invention, by moving the lid, it is possible to prevent entry of foreign matter from the opening of the hopper. Moreover,
The lid can be opened and closed in a minimum space from the space occupied by the concrete mixer truck. Particularly, ready-mixed concrete and other construction materials can be used on construction sites where the road width is narrow or there are obstacles above. It is useful when transporting.

More specifically, according to the present invention, the lid is caused to run in the front-rear direction of the vehicle along the guide rail provided on the side of the hopper, and the distance from the guide rail is kept constant along the way. Because the direction of travel changes downward in an arc, the lid does not require space for moving the vehicle in the left-right direction, and the space in the vertical direction is also suppressed. Can be.

At this time, the opening of the hopper is opened by moving the lid along the opening surface of the hopper toward the rear of the vehicle and then changing the direction while drawing an arc toward the lower rear. By arranging the guide rails in such a manner, the length of the guide rail can be kept as short as possible.

If the lid and the roller chain are connected so that the trajectory of the lid is longer than the trajectory of the roller chain, the guide rail can be positioned below the opening of the hopper. It does not obstruct the work of pouring cement etc. from the opening of the opening, and by connecting so that the distance between the roller chain and the lid is large, the length of the guide rail can be suppressed, and the opening and closing device The whole can be made more compact.

If the guide rail is provided with a stopping means for stopping the running of the lid at a predetermined position, the lid does not run out of control.

At this time, the structure can be simplified if the stopping means is a locking member.

On the other hand, if a limit switch is provided as the stopping means, unnecessary energy applied to the motor and the like before the operation of the motor is stopped by a manual switch can be cut, and the operation is convenient. In addition, the life of the components can be extended.

When the lid is made of a synthetic resin, it is possible to secure excellent corrosion resistance, as well as rust prevention effect, light weight and strength.

If a cover made of an elastic material is attached to the periphery of the lid, airtightness when the lid covers the opening of the hopper can be improved, and the lid, the hopper 14 and the cover can be improved. 15 buffer functions can be achieved.

Further, if a vinyl sheet is provided on the side of the lid and the side is surrounded from above the hopper to the opening of the hopper when the lid is open, the ready-mixed concrete is poured when the fresh concrete is poured into the hopper. It is possible to prevent scattering from the concrete hopper to the outside.

[0045]

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a hopper cover device according to the present invention.

FIGS. 2A and 2B are diagrams showing details of the embodiment, wherein FIG. 2A is a partial view of a guide rail, FIG. 2B is a sectional view taken along line AA of FIG.
(c) is a cross-sectional view similar to (b) of the guide rail showing the connecting state of the connecting tool, and (d) is a perspective view showing a state where a vinyl sheet is attached to the lid.

FIG. 3 is a perspective view showing a state in which the hopper lid device according to the present embodiment is attached to a concrete mixer truck.

4 (a) to 4 (c) are partial side views showing the running state of the lid of the hopper lid device according to the present embodiment, wherein (a) is a closed state of the hopper, and (b) is a side view thereof. , The state of the hopper being opened or closed, and (c) shows the opened state of the hopper.

FIG. 5 is a perspective view of a conventional concrete mixer truck viewed from the rear.

FIG. 6 is a rear perspective view showing the opening and closing direction of a lid of a conventional concrete mixer truck.

[Explanation of symbols]

 10,50 Concrete mixer truck 11 Chassis 12,51 Concrete mixer 13 Frame 14,52 Hopper 14a, 52a Opening 15,23a, 23b Cover 16 Guide rail 16a Linear part 16b Curved part 16c Groove 16d Extension part 17 Roller chain 17a Roller Link 18 Connector 18a Attachment 18b Slud 18c Arm 18d Contact 19,54 Lid 20 Motor 21,22 Limiter 21a, 22a Engagement 24 Vinyl sheet 25 Bar-shaped member 26 Operator's cab

Claims (10)

[Claims] 1. A lid which is arranged in a vehicle and is formed so as to cover an opening of a hopper whose upper side is open, and the lid is moved so as to open and close the opening of the hopper. Means for opening and closing the hopper lid. 2. The lid is formed so as to cover an edge of the opening of the hopper disposed at the rear of a concrete mixer truck, and the lid is configured to open and close the opening of the hopper. Means for moving the side of the hopper, and
A pair of guide rails disposed on the concrete mixer truck in a form curved downward from the rear of the hopper to the concrete mixer truck, and means for moving the lid along the guide rails. The hopper lid opening / closing device according to claim 1, wherein: 3. A means for causing the lid to travel along the guide rails includes: a pair of chains loosely fitted to the pair of guide rails; a chain driving device capable of transporting the chains in a reciprocating direction; The opening / closing device for a hopper lid according to claim 2, further comprising a connecting member that connects the lid and the chain. 4. The connecting member according to claim 1, wherein the trajectory of the lid is longer than a trajectory of the chain when the lid is moved to open and close the opening of the hopper. The opening / closing device for a lid for a hopper according to claim 3, wherein the chain and the lid are connected at an interval. 5. The opening / closing device for a hopper lid according to claim 2, wherein a restricting means for restricting travel of the lid at a predetermined position is provided on the guide rail. 6. The locking member according to claim 5, wherein said lid stopping means is a locking member which comes into contact with said connecting portion when said lid closes and opens said opening of said hopper. Hopper lid opening and closing device. 7. The opening / closing device for a hopper lid according to claim 6, wherein the locking member is a limit switch for stopping the operation of the chain driving device when the connecting portion abuts. . 8. The hopper lid opening / closing device according to claim 1, wherein the lid is made of a synthetic resin. 9. The opening / closing device for a hopper lid according to claim 1, wherein a cover made of an elastic body is attached to a peripheral portion of the lid. 10. A vehicle according to claim 1, wherein a vinyl sheet is provided on a side portion of the lid so as to surround a side surface from above the hopper to the opening of the hopper when the lid is open. 10. The hopper cover opening / closing device according to any one of 1 to 9.