JPH0653511U - Hopper door opening and closing device for garbage trucks - Google Patents

Abstract

(57) [Abstract] [Purpose] The push rod is prevented from being subjected to excessive force to prevent it from being cut off, the hopper door can be opened and closed smoothly, and the handle is attached to the hopper door at a designed position. Being able to give freedom. [Structure] A pair of rollers 34 is configured to roll in the guide rails 18 on both sides of the inlet 13, and a push rod 36 is provided on stoppers 25 and 26 provided on the upper and lower inner side surfaces of the tailgate 12. The L-shaped handle 48 is urged to engage with each other, and is pivotally attached to the handle 44, and one end of the handle 48 and the proximal end of the push rod 36 are connected by a wire cable 50.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hopper door opening / closing device for a refuse collecting vehicle, and more particularly to a hopper door opening / closing device for a refuse collecting vehicle in which a dust inlet provided at the rear of a tail gate of the refuse collecting vehicle is opened and closed by a hopper door.

[0002]

[Prior art]

 Generally, garbage trucks are equipped with a tailgate at the rear of the dust container, and a rear opening of the tailgate has an opening for the input of dust, and a hopper door is manually attached to this opening. It is equipped with a hopper door opening / closing device that moves up and down to open and close it. When loading dust, first raise the hopper door upwards to open the dust input port, insert the dust into the tailgate from this input port, and then use the dust loading device to store the dust in the dust storage box. It is configured to be pushed in.

As this kind of hopper door opening / closing device, for example, the one disclosed in Japanese Utility Model Laid-Open No. 58-147903 is known. According to the opening / closing device disclosed in this publication, as shown in FIG. 7, guide rails 1 having a U-shaped cross section are provided on both sides of the dust entrance of the tailgate so as to extend in the vertical direction. The wedge-shaped stoppers 2 are installed at the upper and lower parts of the groove of the guide rail 1. On the other hand, a rod receiver 4 is provided on the lower side of the hopper door 3, and a push rod 5 that enters the groove of the guide rail 1 and engages with the stopper 2 is slidable on the rod receiver 4. It is supported. The push rod 5 is biased by the spring force of the spring 6 so as to project outward. As shown in FIG. 8, a reduced diameter portion 5a is connected to the proximal end side of the push rod 5, and the reduced diameter portion 5a is an L-shape pivotally attached to the handle 7 via a hinge shaft. Is engaged with the arm portion 9 of the handle 8.

Therefore, when the operator grips the handle 8 and rotates the handle 8 in the direction of arrow A in FIG. 8 when opening and closing the hopper door, the push rod 5 resists the spring biasing force of the spring 6. The stopper 2 and the tip of the push rod 6 are unlocked by moving in the direction of arrow B in FIG. 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. 7 by the urging force of the spring 6 to be engaged with the stopper 2 and locked.

[0005]

[Problems to be solved by the device]

 In the opening / closing device as described above, the push rod 5 has a reduced diameter portion 5a on the handle 8 side, the diameter of which is reduced. Therefore, when the tip of the push rod 5 is engaged and locked with the stopper 2 when the hopper door is opened and closed, a large impact force due to the weight of the hopper door 3 is applied to the push rod 5 and the reduced diameter portion 5a. At the same time, a repetitive load is added due to vibrations and the like during traveling with the hopper door open and closed. As a result, the gap between the push rod 5 and the reduced diameter portion 5a may be broken. It is considered that there is a gap between the push rod 5 and the rod receiver 4, a bending force is applied to the push rod 5 due to this gap, and fatigue causes cutting.

Further, since the force transmission between the handle 8 and the stopper 2 is performed by the push rod 5 which is a rigid body, the vertical and horizontal positional relationship between the handle 8 and the stopper 2 is this rigid body. Determined by push rod 5. As a result, there was no freedom in designing this positional relationship.

Further, when the hopper door is opened and closed, the push rod 5 slides in the guide rail 1 to guide the lower part of the hopper door. For this reason, an unreasonable force may be applied when the push rod slides on the guide rail at a location where the section modulus changes, such as between the push rod 5 and the reduced diameter portion 5a. It also contributes to the loss. Further, if dust or the like adheres to the inside of the guide rail 1, a large force may be required to open and close the hopper door.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, prevent excessive force from acting on the push rod to prevent breakage of the push rod, and smooth the hopper door. An object of the present invention is to provide a hopper door opening / closing device for a dust collection vehicle, which can be opened / closed and can give a degree of freedom in designing the mounting position of the handle to the hopper door.

[0009]

[Means for Solving the Problems]

 In the hopper door opening and closing device of the garbage truck, an opening is provided on the rear surface of the tailgate of the garbage truck to open and close the hopper door by raising and lowering the hopper door. A pair of guide rails provided with a guide groove extending in the vertical direction, a pair of rollers installed near both ends of the inner surface of the hopper door and rolling along the guide groove of the guide rail, and a pair of rollers of the hopper door. A push rod movably supported in the axial direction near the side edge of the inner surface and constantly urged by a spring so as to contact the inner surface of the tailgate side plate, and fixed to the upper and lower parts of the inner surface of the tailgate side plate. And a pair of stoppers capable of receiving the tip end portion of the push rod, a handle provided on the outer surface side of the hopper door, and one end pivotally attached to the handle and one end of the hopper. And handle L-shape is introduced into the A, it is characterized in that it comprises a wire cable which connects the one end and the push rod introduced into the hot Padua of the handle.

[0010]

[Action]

 According to the present invention, since the wire cable is connected between one end of the handle and the push rod, the wire cable absorbs an unnecessary load acting on the push rod when the hopper door is locked, the opening / closing operation is performed, and the vehicle is running. To be done. Therefore, it is possible to prevent unreasonable force from acting on the push rod and prevent breakage.

Further, since the roller rolls in the guide groove of the guide rail to guide the hopper door, it is possible to realize smooth opening and closing of the hopper door.

Further, since the positional relationship between the push rod and the handle can be set relatively freely by using the wire cable, the handle mounting position with respect to the hopper door can be provided with a degree of freedom in design. Furthermore, if the spring and wire cable are set relatively taut, the rattling of the handle can be prevented.

[0013]

【Example】

 Hereinafter, an embodiment of a hopper door opening / closing device for a refuse collecting vehicle according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, a tailgate 12 is connected to a rear portion of a dust container 10 of a refuse collection vehicle through a pivot 11, and a rear surface of the tailgate 12 is provided with an inlet for throwing dust. 13 (see FIG. 2) is opened, and a hopper door 14 for opening and closing the input port 13 is provided to be movable up and down. At the time of loading dust, first, the hopper door 14 is lifted upward to open the charging port 13, the dust is thrown into the tailgate 12 through the charging port 13, and the thrown dust is fed to the rotating panel 15 and the pushing panel 16. It is configured to be pushed into the dust storage box 10 by the dust loading device 17 consisting of.

As shown in FIGS. 2 and 3, a pair of guide rails 18 having a U-shaped cross section and extending upward and downward are provided on both sides of the inlet 13 so that the guide grooves face each other. ing. Rollers 34 rotatably provided on both sides below the inner surface of the hopper door 14, which will be described in detail later, roll along the guide grooves of the guide rails 18. A pair of support shafts 20 are provided on both sides of the upper end of the hopper door 14, and a tip of a rotary arm 22 is rotatably coupled to the support shaft 20, and a base end of the rotary arm 22 is a tail. It is rotatably supported by the shaft 23 of the gate. One end of a spring 24 is fixed to the middle portion of the rotating arm 22, whereby the rotating arm 22 is urged upward, and the rotating arm 22 causes the rotating arm 22 to move the shaft 23. When rotated about the center, the hopper door 14 is opened as shown by a virtual line in FIG. In addition, a stopper 25 for opening the hopper door is arranged at a position above the inner surface of the tailgate 12 and close to the guide rail 18, and at a position on the inner surface of the tailgate 12 near the lower guide rail 18. A stopper 26 for closing the hopper door is arranged. The stoppers 25 and 26 are fixed inside the side plate 27 of the tailgate 12 as shown in FIGS.

FIG. 4 shows a horizontal cross section of the lower portion of the hopper door 14, and a pair of brackets 28, 30 are provided on the inner surface of the hopper door 14 with a space therebetween, with respect to these brackets 28, 30. The shaft 32 is fixed by welding or the like. A roller 34 is rotatably supported at the tip of the shaft 32. The roller 34 projects laterally from the hopper door 14, is positioned in the guide groove of the guide rail 18, and rolls in the guide groove. To do.

Further, a push rod 36 is supported on the brackets 28 and 30 so as to be slidable in the axial direction, and the tip of the push rod 36 is a stopper 25 or 26 as shown in FIG. It is designed to be inserted inside. A washer 38 is provided at an intermediate portion of the push rod 36, and its movement is blocked by a split pin 40. A spring 42 is interposed between the washer 38 and the bracket 30, and the push rod 36 is biased toward the stopper 25 or 26 by the spring biasing force of the spring.

As shown in FIG. 4, a handle 44 is attached to the outer surface of the hopper door 14, and an L-shaped handle 48 is pivotally attached to the handle 44 via a pin 46. There is. The handle 48 includes a grip portion 48a for a worker to grip, and an arm portion 48b extending substantially at a right angle. A hole 49 (see FIG. 6) for inserting a wire cable 50, which will be described later, is formed at the tip of the arm portion 48b.

Further, as shown in an enlarged manner in FIG. 6, a wire cable 50 connects between the arm portion 48 b of the handle 48 and the base end of the push rod 36. That is, one end side of the wire cable 50 is inserted through the hole 49 of the arm portion 48b so as to be freely movable, and the spherical stopper 52 is fixed to this one end. On the other hand, a screw rod 54 is fixed to the other end of the wire cable 50, and the screw rod 54 is screwed into a screw hole 56 formed at the base end of the push rod 36. Further, the nut 58 is screwed onto the threaded rod 54 to tighten the proximal end of the push rod 36, thereby preventing the wire cable 50 and the push rod 36 from loosening. Furthermore, the wire cable 50 is relatively tight and tight so that there is no slack. As a result, rattling of the handle 48 is prevented.

With this configuration, when the lock is released when the hopper door is opened and closed, the operator grips the grip portion 48a of the handle 48 and moves the handle 48 in the direction of arrow D in FIG. Then, the wire cable 50 is moved to the side of the handle 48 against the urging force of the spring 42, the tip of the push rod 36 is pulled out from the stopper 25 or 26, and the lock is released. When the operator releases the grip portion 48a of the handle 48 when the hopper door is locked when the door is opened and closed, the wire cable 50 and the push rod 36 are stopped by the spring biasing force of the spring 42. It is moved toward 26, and the tip of the push rod 36 is inserted into the stopper 25 or 26 and locked.

As described above, the wire cable 50 is interposed in a part of the transmission between the handle 48 and the push rod 36. Therefore, the unnecessary load acting on the push rod 36 is absorbed by the wire cable 50 when the hopper door is locked, the opening / closing operation is performed, and the vehicle is running. Therefore, it is possible to prevent unreasonable force from acting on the push rod 36 and prevent breakage. Further, since the roller 34 is configured to roll in the guide groove of the guide rail 18 and guide the hopper door 14, the hopper door 14 can be smoothly opened and closed.

[0022]

[Effect of device]

 As is apparent from the above description, according to the present invention, since the wire cable is connected between the handle and the push rod, an unnecessary load acting on the push rod is applied when the hopper door is locked, the opening / closing operation is performed, and the vehicle is traveling. Is absorbed by the wire cable. Therefore, it is possible to prevent unreasonable force from acting on the push rod and prevent breakage. Further, the roller rolls in the guide groove of the guide rail to guide the hopper door, so that the hopper door can be smoothly opened and closed. Further, by using the wire cable, the positional relationship between the push rod and the handle can be set relatively freely, and the mounting position of the handle with respect to the hopper door can be given a degree of freedom in design. Furthermore, if the spring and the wire cable are set to be relatively taut, the rattling of the handle can be prevented.

[Brief description of drawings]

FIG. 1 is a side view of a garbage truck to which a hopper door opening / closing device according to the present invention is applied.

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

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

FIG. 4 is a plan view showing the unlocked state of the hopper door opening / closing device according to the present invention.

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

FIG. 6 is a view showing a state in which a push rod and a 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 portion of a conventional hopper door opening / closing device.

[Explanation of symbols]

 12 Tailgate 13 Input Port 14 Hopper Door 18 Guide Rail 25, 26 Stopper 34 Roller 36 Push Rod 42 Spring 44 Handle 48 Handle 50 Wire Cable

Claims (1)

[Scope of utility model registration request] 1. A hopper door opening / closing device for a refuse collecting vehicle, wherein an opening for introducing a refuse is opened on a rear surface of a tailgate of the garbage collecting vehicle, and the hopper door is moved up and down to open and close the opening. A pair of guide rails provided on both sides of the input port and having guide grooves extending in the up-down direction, and a pair of rollers installed near both ends of the inner surface of the hopper door and rolling along the guide grooves of the guide rails, A push rod supported axially movably near the side end of the inner surface of the hopper door and constantly urged by a spring so as to contact the inner surface of the tailgate side plate, and upper and lower parts of the inner surface of the tailgate side plate. A pair of stoppers fixed to the push rod and capable of receiving the tip end portion of the push rod, a handle provided on the outer surface side of the hopper door, and one end pivotally attached to the handle. A handle L-shaped introduced into the Ppadoa, Hoppadoa switchgear refuse collection vehicles, characterized in that it comprises a wire cable which connects the one end and the push rod introduced into the Hoppadoa of the handle.