JP2601545Y2 - Garbage truck hopper door opening and closing device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hopper door opening / closing device for opening / closing a dust inlet provided behind a tailgate of a garbage truck.

[0002]

2. Description of the Related Art Generally, a refuse collection vehicle is provided with a tailgate at a rear portion of a refuse storage box, and at the rear surface of the tailgate, a refuse input port for refuse input is provided. Is provided with a hopper door for manually lifting and lowering the hopper door to open and close it.
When loading the garbage, first raise the hopper door to open the garbage input port, put the garbage into the tailgate from the garbage input port, and put the input garbage into the garbage storage box with the garbage loading device. It is configured to be pushed in.

A device for opening and closing a hopper door of this type is disclosed, for example, in Japanese Utility Model Laid-Open No. 58-147903. In the hopper door opening / closing device disclosed in this publication, as shown in FIG. 7, guide rails 1 having a U-shaped cross section are provided on the left and right sides of the dust input port of the tail gate so as to extend in the vertical direction. A wedge-shaped engaging portion 2 is provided at an upper portion and a lower portion in the groove of the guide rail 1. On the other hand, a rod receiver 4 is provided at a lower side of the hopper door 3.
Further, a push rod 5 that enters the groove of the guide rail 1 and engages with the engaging portion 2 is slidably supported. The push rod 5 is spring-biased so as to protrude outward by the spring force of the spring 6. As shown in FIG. 8, a reduced diameter portion 5a is connected to the proximal end of the push rod 5, and the reduced diameter portion 5a is connected to the handle 7 via a hinge shaft. It is engaged with the arm 9 of the U-shaped handle 8.

Accordingly, when the operator grips the handle 8 and turns the handle 8 in the direction of arrow A in FIG. 8 when the hopper door is opened and closed, the push rod 5 pushes the spring 6 against the spring biasing force of FIG. In the direction B, the engagement between the engaging portion 2 and the tip of the push rod 6 is released. On the other hand, when the operator releases the handle 8 when opening and closing the hopper door, the push rod 5 is moved in the direction of arrow C in FIG.

[0005]

In the above-mentioned conventional hopper door opening and closing device, when the tip of the push rod 5 is engaged with the engaging portion 2, a large inertial force accompanying the weight of the hopper door 3 is generated. When repeatedly acting on the push rod 5, a large bending moment acts on the push rod 5 repeatedly. As a result, the push rod 5 may be bent or deformed, or the reduced diameter portion 5a may be cut off due to fatigue.

Further, since the push rod 5 extends in a straight line, the push rod 5 cannot not only absorb the displacement of the relative position between the handle 8 and the engaging portion 2 in the vertical and horizontal directions, but also has a high degree of freedom in design. Is also low.

Further, when the push rod 5 collides with dust remaining in the tail gate when closing the hopper door,
In some cases, the push rod 5 is bent, and the operation of the handle 8 makes it impossible to release the engagement between the push rod 5 and the engaging portion 2.

[0008] Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, to prevent an unreasonable force from acting on the push rod and to prevent the push rod from being cut.
An object of the present invention is to provide a hopper door opening / closing device for a refuse collection vehicle that can smoothly open and close a hopper door and can provide a degree of freedom in designing a mounting position of a handle to the hopper door.

[0009]

According to the present invention, there is provided a hopper door opening / closing device for opening / closing a dust input port of a tailgate connected to a rear portion of a dust storage box. A pair of left and right guide rails extending along the top and bottom, and a pair of left and right guides provided on the hopper door, which are displaced while engaging with the guide rails to guide the opening and closing of the hopper door. A member, a pair of left and right engagement portions respectively provided on the guide rail side, and the engagement portions being removably engaged with each other to fix the hopper door to the open side so as not to be displaceable. A pair of left and right engagement members disposed on the inner surface side of the hopper door so as to be able to freely contact and separate from the joint portion, and biasing means for constantly biasing these engagement members toward the side engaged with the engagement portion When the displacement on the outer surface of the Hoppadoa A handle supported on standing, the C
A portion of the handle located on the inner surface side of the hopper door,
Disposed on the inner surface side of the hopper door for connecting with an engagement member
And a hopper door urging means for urging the hopper door to the open side. When the handle is operated in a predetermined direction, the wire pulls the wire cable to displace the engagement member to a side away from the engagement portion to release the engagement between the engagement member and the engagement portion. When the engaging member is engaged with the engaging portion.
Even if it is pulled by the wire cable
Direction so that it is no longer displaced in the opposite direction.
Supported by Padua. The wire cable is arranged to bend and deform when foreign matter in the tail gate comes into contact, and to pull the engagement member to release the engagement with the engagement portion.

[0010]

In the hopper door opening / closing device for a refuse collection vehicle according to the present invention, a pair of left and right guide members which are displaced while engaging with the guide rails guide the opening / closing of the hopper door, so that the hopper door can be smoothly opened / closed. . at the same time,
Since the guide member transmits at least a part of the inertial force acting on the hopper door to the guide rail, the external force acting on the engagement member can be reduced.

Further, even if an external force acts on the engaging member due to the engagement with the engaging portion, the wire cable is flexible, so that the wire cable does not break due to fatigue or the like due to a bending moment.
Further, the displacement of the relative position between the handle and the engaging member can be absorbed by the wire cable.

In addition, when foreign matter in the tailgate comes into contact with the wire cable, the wire cable bends and deforms, pulling the engaging member to release the engagement with the engaging portion. At this time, since the hopper door urging means urges the hopper door to the opening side, the hopper door can be opened. As a result, as in the conventional hopper door opening / closing device, the foreign matter in the tail gate contacts the push rod and bends it,
It does not fall into a state where the hopper door cannot be opened.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a hopper door opening and closing device for a refuse collection vehicle according to the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a tailgate 12 is connected via a pivot 11 to a rear portion of a refuse storage box 10 of a refuse collection vehicle.
A dust input port 13 (see FIG. 2) is opened on the rear surface of the tailgate 12, and a hopper door 14 for opening and closing the dust input port 13 is provided to be able to move up and down. When loading garbage, the hopper door 14 is first lifted upward to open the trash insertion port 13, trash is injected into the tailgate 12 from the trash input port 13, and the input trash is rotated by the rotating panel 15 and the pressing panel 1.
6 is configured to be pushed into the refuse storage box 10 by the refuse loading device 17 composed of.

As shown in FIGS. 2 and 3, a pair of left and right guide rails 18 having a U-shaped cross section and extending in the vertical direction are provided on both left and right sides of the refuse inlet 13 so that the guide grooves are opposed to each other. It is arranged so as to make it. And
While engaging with the guide grooves of these guide rails 18, rollers 34, which will be described later, rotatably provided on both sides below the inner surface of the hopper door 14 roll.

On both sides of the upper end of the hopper door 14, a pair of support shafts 20 are protrudingly provided.
0, the tip of the rotating arm 22 is rotatably connected, and the base end of the rotating arm 22 is rotatably supported by the tail gate shaft 23. One end of a spring 24 is fixed to an intermediate portion of the rotating arm 22, whereby the rotating arm 22 is urged upward, and the spring biasing force causes the rotating arm 22 to rotate about the shaft 23. When rotated, the hopper door 14 is opened, as indicated by the phantom line in FIG. That is, the rotation arm 22 and the spring 24
Pushes the hopper door 14 to the open side.
Means. Further, an engaging portion 25 for opening the hopper door is disposed at a position above the inner surface of the tailgate 12 and close to the guide rail 18, and at a position close to the lower guide rail 18 on the inner surface of the tailgate 12. Has an engaging portion 26 for closing the hopper door.
These engaging portions 25 and 26 are fixed near the guide rail 18 as shown in FIGS.

FIG. 4 shows a horizontal section of a lower portion of the hopper door 14. A pair of brackets 28, 30 are provided on the inner surface of the hopper door 14 at intervals. Thus, the shaft 32 is fixed by welding or the like. A roller 3 is provided at the tip of the shaft 32.
The roller 34 is rotatably supported, and the roller 34 protrudes laterally from the hopper door 14 and is located in the guide groove of the guide rail 18, and rolls in the guide groove. That is,
A roller 34 provided at the tip of the shaft 32 serves as a guide rail.
18 is displaced while engaging the guide opening and closing of Hoppadoa 14
A pair of left and right guide members provided on the hopper door 14
Is composed.

Further, the brackets 28 and 30 include
An engaging member 36 is supported so as to be slidable in the axial direction, and the distal end of the engaging member 36 is engaged with the engaging portions 25 and 26 so as to be detachably engaged as shown in FIG. Have been. A washer 38 is provided at an intermediate portion of the engagement member 36, and is prevented from moving by a split pin 40. Between the washer 38 and the bracket 30, a switch as a biasing means is provided.
A spring 42 is interposed, and the engaging member 36 is engaged with the engaging portions 25 and 26 by the spring biasing force of the spring 42.
Side is always biased.

As shown in FIG. 4, a bracket 44 is attached to the outer surface of the hopper door 14, and an L-shaped handle 48 is pivotally attached to the bracket 44 via a pin 46. The handle 48 includes a grip portion 48a for gripping by an operator and an arm portion 48b extending substantially at right angles thereto. This arm part 4
A hole 49 (see FIG. 6) through which a wire cable 50 described later is inserted is formed at the distal end of 8b.

Further, as shown in an enlarged manner in FIG. 6, the arm portion 48b of the handle 48 and the base end of the engaging member 36 are connected by a wire cable 50. That is,
One end of the wire cable 50 is inserted into the hole 49 of the arm portion 48b so as to be freely movable, and a spherical engaging portion 52 is fixed to this end. On the other hand, a screw rod 54 is fixed to the other end of the wire cable 50, and a screw hole 56 formed at the base end of the engaging member 36 is formed.
, The screw rod 54 is screwed. Further, the nut 58 is screwed into the threaded rod 54 to tighten the proximal end of the engaging member 36, whereby the wire cable 50 and the engaging member 36 are tightened.
To prevent loosening. Further, the wire cable 50
Is relatively tense so that there is no slack. As a result, rattling of the handle 48 is prevented.

[0021] Since the thus configured, when unlocked by breaking Hoppadoa the operator the direction of arrow D in FIG. 4 the handle 48 by holding the holding portion 48a of the handle 48 (predetermined direction ) , The wire cable 50 is pulled against the handle 4 against the urging force of the spring 42.
8 and the tip of the engaging member 36 and the engaging portion 2
The engagement with 5, 26 is released. When the hopper door is locked when the hopper door is opened and closed, when the operator releases the grip portion 48a of the handle 48, the wire cable 50 and the engagement member 36 cause the engagement portion 2 by the spring biasing force of the spring 42.
The engagement member 36 is moved toward the engagement portions 25 and 26 and locked.

On the other hand, the engaging member 36 is engaged with the engaging portion 25.
When the foreign matter in the tail gate 12 contacts the wire cable 50 during the operation, the wire cable 50 bends and deforms. At this time, as shown in FIG. 5, since the arm portion 48b of the handle 48 is in contact with the inner surface of the bracket 44, even if the handle 48 is pulled by the handle wire cable 50, the handle 48 is displaced in the opposite direction to the predetermined direction. Never do. Thereby, only the engagement member 36 is pulled by the bending deformation of the wire cable 50, and the engagement with the engagement portion 26 is released. Then, since the rotating arm 22 and the spring 24 urge the hopper door 14 to the open side, the hopper door 14 is opened. As a result, unlike the conventional hopper door opening / closing device, the foreign matter in the tail gate does not contact the push rod and bend it, so that the hopper door cannot be opened.

[0023]

As is apparent from the above description, the hopper door opening / closing device for a refuse collection vehicle according to the present invention has a pair of left and right guide members which are displaced while engaging with the guide rail to guide the opening and closing of the hopper door. Can be smoothly opened and closed. At the same time, since the guide member transmits at least a part of the inertial force acting on the hopper door to the guide rail, the external force acting on the engaging member can be reduced. Further, even if an external force acts on the engaging member due to the engagement with the engaging portion, the wire cable is flexible, so that the wire cable does not break due to fatigue or the like due to a bending moment. Further, the displacement of the relative position between the handle and the engaging member can be absorbed by the wire cable. In addition, when the foreign matter in the tailgate comes into contact with the wire cable, the wire cable bends and deforms, and pulls the engaging member to release the engagement with the engaging portion. At this time, since the hopper door urging means urges the hopper door to the opening side, the hopper door can be opened. As a result, unlike the conventional hopper door opening / closing device, the foreign matter in the tail gate does not contact the push rod and bend it, so that the hopper door cannot be opened. Therefore, according to the present invention, it is possible to prevent an excessive force from acting on the push rod to prevent the push rod from being cut, and to smoothly open and close the hopper door. It is possible to provide a hopper door opening / closing device for a refuse collection vehicle that can give a certain degree.

[Brief description of the drawings]

FIG. 1 is a side view of a refuse collection vehicle to which a hopper door opening and closing device according to the present invention is applied.

FIG. 2 is a side view showing an embodiment of the hopper door opening and closing device according to the present invention.

FIG. 3 is a rear view of the hopper door opening and closing device according to the present invention.

FIG. 4 is a plan view showing a state in which the lock of the hopper door opening and closing device according to the present invention is released.

FIG. 5 is a plan view showing a locked state of the hopper door opening and closing device according to the present invention.

FIG. 6 is a diagram showing a state in which the push rod and the handle are connected by a wire cable.

FIG. 7 is a front view showing a conventional hopper door opening / closing device.

FIG. 8 is a plan view showing an opening / closing operation section of a conventional hopper door opening / closing device.

[Explanation of symbols]

 12 Tailgate 13 Dust inlet 14 Hopper door 18 Guide rail 25, 26 Engagement part 34 Roller 36 Engagement member 42 Spring 44 Bracket 48 Handle 50 Wire cable

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A-52-109221 (JP, A) JP-A-3-130205 (JP, U) JP-A-58-147903 (JP, U) JP-A-56-147903 139626 (JP, U) Japanese Utility Model Application 57-144733 (JP, U) Japanese Utility Model Application 1-83702 (JP, U) Japanese Utility Model Application 57-91705 (JP, U) Japanese Utility Model Application 60-154305 (JP, U) Japanese Patent Publication No. Sho 62-14441 (JP, B2) Japanese Patent Publication No. Sho 61-27281 (JP, B2) Japanese Utility Model Publication No. Sho 61-39681 (JP, Y2) (58) Field surveyed (Int. Cl. ⁶ , DB name) B65F 3/00-3/28

Claims (1)

(57) [Scope of request for utility model registration] 1. A hopper door opening / closing device for opening and closing a dust input port of a tailgate connected to a rear part of a dust storage box, wherein the hopper door is disposed along the dust input port and extends vertically. A pair of guide rails; a pair of left and right guide members provided on the hopper door, which displace while engaging with the guide rails to guide the opening and closing of the hopper door; a pair of engaging portions, these engaging portions and respectively engaged detachably engaged non-displaceable be fixed to the side opening said Hoppadoa, the inner surface of the contact and separation freely the Hoppadoa to the engagement portion A pair of left and right engaging members, biasing means for constantly biasing these engaging members toward a side engaging with the engaging portion, and a handle supported on the outer surface of the hopper door so as to be displaceable. If, of the handle Portion positioned on the inner surface side of the serial Hoppadoa
And the engagement member, the inner side of the hopper door
And a hopper door urging means for urging the hopper door to the open side, wherein the handle is operated in a predetermined direction to pull the wire cable to engage the engaging member. Disengaging the engagement member and the engagement portion by displacing the side away from the joining portion,
When the engagement member is engaged with the engagement portion,
Even if pulled by the ear cable,
To prevent further displacement in the opposite direction,
Supported, and the wire cable is arranged so as to bend and deform when foreign matter in the tail gate comes into contact, and to pull the engagement member to release the engagement with the engagement portion. A hopper door opening / closing device for a garbage truck.