JPH0586682U - Hopper cover - Google Patents

Abstract

(57) [Abstract] [Purpose] Opening and closing operations of the hopper can be performed with one drive member, and it is not necessary to provide a fixing means for fixing the seat covering the opening, and the opening and closing operations can be performed safely on one side of the hopper. .. [Structure] Two frame bodies 18, which are inclined from the rear toward the front, are provided in parallel on both sides of the opening 8a of the hopper 8, and a winding pipe 19 is rotatably installed between the rear portions of the respective frame bodies. A sheave 20 is rotatably provided on both sides of the pipe, an electric or manual driving member is attached to one end of the take-up pipe, and a roller guide 22 is provided at a front portion of each frame body. The guide 25 rotatably supports a roller 25 which is urged forward by a spring 27 and is slightly movable in the front-rear direction, and an endless wire 28 is rotatably installed between the sheave and the roller which face each other. It is assumed that a rod 29 is installed between the endless wires in a direction orthogonal to each other, and a sheet 30 for opening and closing the opening of the hopper is connected between the rod and the winding pipe.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hopper cover for a mixer truck suitable for opening and closing a hopper opening of a concrete mixer truck.

[0002]

[Prior Art]

 As shown in FIG. 7, a conventional concrete mixer truck of this type has a drum mounted on a chassis 2, and one end of the drum 1 is provided with a hopper 3 for feeding raw concrete material.

Although some hoppers 3 are still open, a sheet 5 as a cover is openably and closably arranged at the opening of the hopper 3 as shown in Japanese Utility Model Laid-Open No. 60-29606, for example. It is known that the opening 5 of the hopper 3 is covered with a sheet 5 in order to prevent a change in quality of the fresh concrete during transportation due to rainwater entering 1 and a deterioration thereof, for example, a change in the slump value.

In the hopper cover disclosed in the above publication, as shown in FIG. 8, a plain U-shaped raw concrete splash guard 7 is erected at the opening edge of the hopper 3, and a pipe 6 is provided at the end of the hopper 3. A take-up device including a handle is provided, and the cover sheet 5 connected to the pipe 6 is pulled forward while overcoming the fresh concrete splash guard 7 to cover the opening of the hopper 3.

[0005]

[Problems to be solved by the device]

 The conventional hopper cover disclosed in the above publication has the following problems.

An operator rides on the chassis 2 to pull out the seat 5 and pulls it out, and in order to store the seat 5, the pipe 6 is also rotated on the chassis 2 via a handle for winding work. However, it is dangerous when working in high places, and the workability is poor because the work for pulling out and the work for winding are performed separately.

In order to pull out the sheet 5 and cover the opening of the hopper for a long time, the end portion of the sheet 5 is fixed by another fixing means so that the sheet 5 is not turned over by the wind, so the number of parts increases. However, the fixing work is also a work at a high place, which is dangerous and troublesome.

In the case of a large mixer truck, the opening portion of the hopper has a lateral diameter and a longitudinal diameter of about 1 m, and it is necessary to perform the above-mentioned work of pulling out, fixing and storing the seat 5 on both sides of the hopper. , Workability is poor and troublesome.

Therefore, an object of the present invention is to open and close the opening portion of the hopper with a single driving member, and it is not necessary to purposely provide a fixing means for fixing the seat covering the opening portion. It is to provide a mixer car hopper cover that can be opened and closed.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the structure of the present invention is such that two frames, which are inclined from the rear to the front, are provided in parallel on both sides of the opening of the hopper, and a winding pipe is provided between the rear parts of the frames. It is rotatably installed, a sheave is rotatably installed on both sides of the winding pipe, and an electric or manual driving member is attached to one end of the winding pipe. Guides are provided, and each roller guide is rotatably supported by a roller that is urged forward by a spring and movable in the front-rear direction, and an endless wire rotates between the sheave and the roller that face each other. It is freely erected, and a rod is erected in a direction orthogonal to each endless wire, and a sheet for opening and closing the opening of the hopper is connected between the rod and the winding pipe. It is intended.

[0011]

[Action]

 For example, if the sheave is rotated clockwise, for example, via the drive member, the endless wire rotates in the same direction, and the rod moves in conjunction with the endless wire, so the rod is pulled and the sheet is pulled out, opening the hopper opening. When the cover is closed and the drive member is driven in the opposite direction, the take-up pipe rotates and the sheet is taken up, and the sheet opens the opening of the hopper.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 show an embodiment of the present invention, which is applied to a hopper cover of the same concrete mixer truck as in FIG. However, the hopper cover is not limited to use in a concrete mixer truck.

The hopper 8 is provided, for example, on the drum of a concrete mixer truck, and is supported by the frames 9 and 10 and the support members 11 and 12 on both sides.

A motor case 13 is provided above the support member 12 via brackets 14 and 15, and a geared motor 16 is built in the motor case 13 as a drive member.

A plane U-shaped splash card 17 is erected on the rear opening edge of the hopper 8 on the drum side (left side in FIG. 1).

Two hollow frames 18, 18 are provided on both sides of the opening 8a of the hopper 8 and are inclined from the upper portion of the splash guard 17 toward the front of the hopper 8. Each of these frames 18, 18 is a support member. It is supported by 11 and the bracket 15.

The frame 18 may not be hollow, but may have its upper part covered with a cover. Each frame 18 is formed with an opening along the axial direction toward at least the opening 8a.

A take-up pipe 19 is rotatably installed between the rear portions of the frames 18 and 18 in a direction orthogonal to each other.

Each sheave 20 is arranged in the rear portion of each frame 18, and each sheave 20 is supported on both sides of the winding pipe 19.

As shown in FIGS. 3 and 4, a bracket 21 stands upright in front of each frame 18, and a flat U-shaped roller guide 22 is fixed to the bracket 21. A roller 24 is supported by a bracket 23 having a U-shaped plane so as to be movable in the front-rear direction.

A spring 27 is interposed between the roller guide 22 and the bracket 23, and the spring 27 biases the roller 24 forward through the bracket 23.

An auxiliary roller 25 supported by a rod 26 is rotatably arranged in front of the roller 24.

An endless wire 28 is rotatably interposed between the sheave 20 and the roller 24, and the endless wire 28 is held between the roller 24 and the auxiliary roller 25.

Since the roller 24 is biased forward by the spring 27, tension is applied to the endless wire 28.

For example, a bifurcated wire guide 23a is vertically provided at a lower portion of the bracket 23 to prevent the end guide wire 28 from being displaced laterally while the wire guide 23a guides the wire guide 23a in the front-rear direction.

Both ends of a seat supporting rod 29 extending in a direction orthogonal to each other are fixed between the endless wires 28 on both sides, and the front end of the seat 30 is fixed to the rod 29. The rear end of the sheet 30 is wound around the winding pipe 19.

When the geared motor is driven clockwise, for example, the endless wire 28 rotates clockwise and the rod 29 connected to the endless wire 28 moves forward, so that this rod 29 pulls out the seat 30 forward. , Cover the opening 8a of the hopper 8 and close it.

When the geared motor is driven in the counterclockwise direction, the endless wire 28 and the rod 29 are moved rearward, the sheet 30 is wound rearward by the rotating winding pipe 19, and the sheet 30 opens the opening 8a.

When the seat 30 is closed, the frame 18 is inclined forward so that rainwater can be drained even if it falls on the sheet 30.

When the rod 29 moves forward and rides on the roller 24, the spring 27 slightly compresses and allows the roller 24 to escape rearward.

The geared motor is driven and operated remotely from the driver's seat of the concrete mixer truck or from under the vehicle body. Therefore, the operation is safe and the operability is good.

The frame 18 is provided with a limit switch 31, and the position of the seat 30 can be arbitrarily set by operating the limit switch 31 to turn on / off the guard motor.

When the geared motor is stopped, the seat 30 can be stopped at an arbitrary position without providing a special stopper.

FIG. 5 shows another embodiment of the present invention in which a manual handle is used as a driving member instead of the geared motor.

That is, the handle 32 is connected to both ends or one end of the take-up pipe 19, and the handle 32 is manually rotated to move the endless wire 28 in the clockwise direction or the counterclockwise direction. To pull out or wind up.

In this case, since the seat 30 is pulled out or retracted by rotating only one handle, the operability is good, and one hand can be held by another chassis or the like even when working at a high place. It's safe. Other configurations are the same as those in FIGS.

FIG. 6 shows another embodiment of the present invention, in which the endless wire is rotated by a manual handle and the handle is provided, for example, under the chassis of a concrete mixer truck.

That is, a manual handle 34 is provided on the chassis 33 of the concrete mixer truck, and a drive belt 36 is installed between the sprocket 35 and the sheave 20 that interlock with the handle 34, and the handle 34 is rotated on the ground or below the chassis 33. When moved, the sheave 20 is rotated via the belt 36 to rotate the endless wire 28.

Other configurations are the same as those in FIGS. 3 and 4.

[0041]

[Effect of the device]

 The present invention has the following effects.

When one drive member such as a geared motor or a manual handle is driven, the endless wire, the rod and the seat move forward or backward in conjunction with each other, so that operability is good and speedup can be achieved.

When the drive member is a geared motor, the operation can be performed, for example, in the driver's seat of the concrete mixer truck or below the chassis, and therefore work at a high place is not performed and the operation is safe. Even if the driving member is a manual handle, only one handle is required, and one handle operation can be performed while being connected to the chassis on one side of the hopper, which provides good operability and safety.

When the driving member is stopped, both the endless wire and the rod seat are stopped, and fixing means such as a stopper for fixing the pulled-out seat is not necessary, and fixing work for that is also unnecessary. It has few points, is safe and has good operability.

Since the frame body is inclined, the sheet that extends along the frame body is also inclined, and even if rainwater is splashed on the sheet, rainwater can be drained along the sheet.

[Brief description of drawings]

FIG. 1 is a side view of a hopper provided with a hopper cover according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a partially enlarged plan view of FIG.

FIG. 4 is a partially enlarged side view of FIG.

FIG. 5 is a partially enlarged plan view of a drive member in a hopper cover according to another embodiment.

FIG. 6 is a partial side view of a drive member in a hopper cover according to another embodiment.

[Explanation of symbols]

 8 Hopper 8a Opening 18 Frame 19 Winding Pipe 20 Sheave 22 Roller Guide 25 Roller 27 Spring 28 Endless Wire 29 Rod 30 Seat 32, 34 Manual Handle as Drive Member

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[Procedure amendment]

[Submission date] February 15, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief explanation of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a side view of a hopper provided with a hopper cover according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a partially enlarged plan view of FIG.

FIG. 4 is a partially enlarged side view of FIG.

FIG. 5 is a partially enlarged plan view of a drive member in a hopper cover according to another embodiment.

FIG. 6 is a partial side view of a drive member in a hopper cover according to another embodiment.

FIG. 7 is a side view showing a concrete mixer truck as a conventional example.

FIG. 8 is a perspective view showing a hopper equipped with a conventional hopper cover.

[Explanation of Codes] 8 Hopper 8a Opening 18 Frame 19 Winding Pipe 20 Sheave 22 Roller Guide 25 Roller 27 Spring 28 Endless Wire 29 Rod 30 Seat 32, 34 Manual Handle as a Driving Member

Claims (1)

[Scope of utility model registration request] 1. A pair of frame bodies, which are inclined from the rear to the front, are provided in parallel on both sides of the opening of the hopper, and a winding pipe is rotatably installed between the rear portions of the respective frame bodies. Sheaves are rotatably provided on both sides, and an electric or manual drive member is attached to one end of the winding pipe. Roller guides are provided at the front of each frame, and springs are provided at each roller guide. A roller that is urged forward by and is slightly movable in the front-rear direction is rotatably supported, and an endless wire is rotatably installed between the sheave and the roller facing each other, and the endless wires are orthogonal to each other. A hopper cover, in which a rod is installed in a direction, and a sheet for opening and closing the opening of the hopper is coupled between the rod and the winding pipe.