JPH0669078U - Dump truck side gate lock device - Google Patents

Abstract

(57) [Summary] [Purpose] An improvement that can effectively suppress wear deformation is added to the shaft,
Preventing the stopper part from coming out of the opening due to traveling vibration, etc., and prohibiting inadvertent opening of the side gate. [Structure] An operating lever 12 is pivotally supported on a shaft 11 extending in the vehicle width direction at an upper corner portion 5a of a side gate 4, and an opening hole 13 through which the operating lever 12 can be inserted is provided in a front support member 7, and the operating lever 12 is provided.
Is composed of a stopper portion 21 which is slidably inserted into the outer vertical side 13a of the opening hole 13 while being slidably contacted with the stopper portion 21 to engage and disengage freely, and a handle portion 22 which rotates the operation lever 12. Then, the shaft 11 is displaced while the sliding contact portion of the stopper portion 21 slidingly contacting the outer vertical side 13a of the opening hole 13 is displaced in the opposite insertion direction as the stopper portion 21 rotates in the insertion direction. The shaft end on the outer vertical side 13a side of the opening hole 13 is positioned so that the tip of the part 21 is located on the back side of the inner vertical side 13b edge of the opening hole 13.
11b is arranged in an inclined state in which it is positioned above the shaft end 11a on the inner vertical side 13b side and on the front support member 7 side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a side gate lock device for a dump truck, and more particularly, to an improvement of an operating lever rotatably supported at upper and lower corners of a side gate.

[0002]

[Prior art]

 In general, dump trucks are provided with side gates that can be opened and closed with the lower end as a fulcrum on both sides of the cargo box.The side gates can be rotated around the axis of the shaft extending in the vehicle width direction at the upper and lower corners of the side gate. A freely-supported operation lever is provided, and a substantially rectangular opening hole is provided in the supporting member facing the upper and lower corners of the front and rear, and the opening member is engaged with the opening hole by insertion. A side gate lock device that locks and unlocks the side gate with an operating lever is configured.

The operation lever is provided closer to the support member than the shaft, and is inserted into the opening hole while slidably contacting one side surface thereof with one longitudinal side of the opening hole so as to engage and disengage the strike lever. The shaft is provided with a cap portion and a handle portion that is provided on the side opposite to the support member with respect to the shaft and that rotates the operation lever around the shaft center of the shaft. It has a horizontal axis extending parallel to.

[0004]

[Problems to be solved by the device]

 However, in the case of the above, since the rotation axis of the operation lever, that is, the axis is a horizontal axis parallel to the opening surface of the opening hole, the stopper portion (one side surface) of the operation lever and the opening hole of the supporting member are formed. The one side vertical side means that the same parts are always in sliding contact with each other, and the sliding contact surfaces become worn and deformed during repeated locking and unlocking operations by the operation lever. There is a problem that the side gate may accidentally open due to running vibrations that cause the part to slip out of the opening.

Therefore, the shaft end on one side of the vertical side of the opening hole is positioned on the side of the other side of the other side so that the tip of the stopper portion is located on the back surface side of the other side vertical side edge part of the opening hole. The stopper is slanted so that it is positioned closer to the support member than the end, and the stopper is slidably contacting the vertical side of one side of the opening from the diagonal direction. Can be considered to increase. However, even in the above-mentioned case, the wear deformation can be suppressed only by the increase in the sliding contact area between them, and the same problem cannot be solved.

The present invention has been made in view of the above points, and its purpose is to improve the wear deformation between the two effectively without merely increasing the sliding contact area. In addition, it prevents the stopper part from slipping out of the opening due to traveling vibration, etc., and prohibits the inadvertent opening of the side gate.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a solution means devised by the invention of claim 1 is to provide openable and closable side gates having lower ends as fulcrums on both sides of the cargo box, and at the upper and lower corners of the side gates. An operation lever rotatably supported around the axis of a shaft extending in the width direction is provided, and a substantially rectangular opening hole is provided in the support member facing the upper and lower corners of the front and rear. It is assumed that the side gate lock device of the dump truck is such that the side gate can be locked and unlocked by the operation lever that is inserted into and engaged with the hole. And a stopper portion provided on the support member side of the shaft with respect to the shaft, the stopper portion being slidably engaged with one side surface of the opening hole while one side surface is slidably inserted. The handle is provided on the side opposite to the supporting member with respect to the shaft and rotates the operating lever around the axis of the shaft, and the shaft is rotated in the insertion direction of the stopper. Accordingly, while the sliding contact portion of the stopper portion slidingly contacting the one vertical side of the opening hole is displaced in the anti-insertion direction, the tip of the stopper portion is placed on the rear surface side of the other side vertical edge portion of the opening hole. In this configuration, the shaft hole on one longitudinal side of the opening hole is arranged in a tilted state so as to be located above the shaft end of the other longitudinal side and on the supporting member side.

Further, the solution means devised by the invention of claim 2 is based on the side gate lock device of the dump car of the invention of claim 1, wherein the operation lever is provided on the support member side of the shaft. The stopper part that is inserted into the opening hole while one side surface is slidably contacting one longitudinal side of the opening hole, and is removably fitted to the opening hole. And a handle portion for rotating the operation lever around the axis of the horizontal shaft, and the shaft is a horizontal shaft extending parallel to the opening surface of the opening hole. Further, a projection is provided at the tip of the stopper portion, which engages so as to sandwich the one side vertical side edge portion of the opening hole from the back surface side.

[0009]

[Action]

 With the above structure, in the device according to claim 1, the shaft that rotatably supports the operation lever around the axis at the upper and lower corners of the side gate is the shaft on one vertical side of the opening hole. The end is arranged in a tilted state so as to be positioned above the shaft end on the other vertical side and on the support member side, and one side of the opening hole is vertically rotated as the operation lever rotates in the insertion direction. Insert the stopper part so that the sliding contact part of the stopper part that slidably contacts the side is displaced in the opposite insertion direction while the tip of the stopper part is positioned on the back surface side of the other side vertical side edge part of the opening hole. Therefore, the stopper portion increases the insertion amount in the insertion direction every time the sliding contact resistance with respect to the one vertical side of the opening of the support member decreases, so that the stopper comes into contact with the one vertical side of the opening. The part is displaced in the opposite insertion direction, and due to the displacement of the sliding contact part of this stopper part, Reduction in sliding resistance due to wear deformation between sliding contact surfaces due to repeated unlocking operation is to be sufficient is updated from time to time. This prevents the stopper part from slipping out of the opening due to traveling vibration, etc., and prevents the side gate from being opened accidentally.

According to the second aspect of the invention, the shaft is a horizontal shaft that extends in a plane with respect to the opening surface of the opening hole of the support member, and the operation lever of the operation lever that rotates around the axis of the horizontal shaft. When the stopper part is rotated in the insertion direction by the projection provided at the tip of the stopper part, the stopper part engages so as to sandwich the one side vertical edge of the opening hole from the back side, so that the running vibration The stopper part is prevented from slipping out of the opening hole due to, for example, and careless opening of the side gate is prohibited.

[0011]

[Effect of device]

 As described above, according to the side gate lock device of the dump truck according to the first aspect of the invention, the sliding contact portion of the stopper portion is inserted each time the sliding resistance of the opening hole of the support member with respect to one longitudinal side of the supporting member decreases. As the displacement in the opposite insertion direction increases the amount of insertion in the direction, the decrease in sliding contact resistance due to wear and deformation of the sliding contact surfaces is updated at any time to ensure sufficient protection. It is possible to prevent the stopper part from slipping out and prohibit the careless opening of the side gate.

Further, according to the side gate lock device for the dump truck in the invention of the second aspect, the stopper portion is engaged by the protrusion at the tip thereof so as to sandwich the one side vertical edge portion of the opening hole from the back surface side. Therefore, it is possible to prevent the stopper portion from coming out of the opening hole due to traveling vibration or the like, and to prevent the side gate from being opened accidentally.

[0013]

【Example】

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

FIG. 4 shows a packing box of a dump truck using the side gate lock device according to the first embodiment of the present invention. The packing box 1 is supported by a dump truck (not shown) so as to be tiltable via a tilting device. Has been done. The cargo box 1 includes a floor bottom 1a on which a load is loaded, front and rear walls 1b and 1c standing upright so that the floor bottom 1a is surrounded by front, rear, left and right sides, and a side wall 1d (only a left side wall in the figure). (Shown), and support members 7 and 8 having a quadrangular cross section, which are erected at the left and right positions of the front end and the left and right positions of the rear end of the packing box 1 (only the left side of the packing box is shown in the figure).

The rear wall 1c is rotatably supported at its lower left and right positions at the lower end of the rear support member 8 via a pair of left and right shafts 2a extending in the lateral direction of the vehicle body and is openable rearward. It is configured in the gate 2. Further, the side wall 1d is rotatably supported at its lower front and rear lower corners 3a, 3b at the lower ends of the front and rear support members 7, 8 via a pair of front and rear shafts (not shown) extending in the longitudinal direction of the vehicle body. The side gate 4 can be opened laterally with its lower end serving as a fulcrum. The front wall 1b is formed to have a height substantially matching the height of a cabin (not shown), while the rear wall 1c, the side wall 1d, and the front and rear support members 7 and 8 are substantially half of the front wall 1b. It is formed to a certain height. In this case, the loading box 1 can be tilted within a range of about 50 ° with respect to the loading platform by the tilting device, and the tailgate 2 (rear wall 1c) is opened due to the tilting operation. By this, the load in the luggage box 1 (floor bottom 1a) can be lowered to the ground from the rear of the luggage box 1. On the other hand, loading of a load in the packing box 1 is performed by appropriately opening the tail gate 2 and the side gate 4 (side wall 1d) according to the load.

As shown in FIGS. 2 and 3, the upper and lower corner portions 5a, 5b of the side gate 4 are rotatably supported around the axis m of the shaft 11 extending in the vehicle width direction. In addition to the operation levers 12 and 12, there is also provided a vertically elongated substantially rectangular opening 6 (only the upper corner 5a on the front side is shown) through which the respective operation levers 12 can be inserted. In addition, at the upper rear position of the front support member 7 and the upper front position of the rear support member 8 facing the front and rear upper corners 5a and 5b, a vertically elongated generally rectangular opening hole 13 ( In the figure, only the front support member 7 side is provided). Then, at the upper corners 5a, 5b of the side gate 4, the side gate 4 can be locked and unlocked by the operation lever 12 which is inserted into the opening hole 13 through the opening 6. The side gate lock device 14 (since it has the same configuration, only the front wall 1b side will be described in the following configuration) is configured.

The operation lever 12 is provided on the front side, which is closer to the front support member 7 side than the shaft 11, and has one side surface on the outer vertical side 13 a which is one side vertical side of the opening hole 13 with respect to the opening hole 13. The stopper portion 21 which is slidably inserted into the outer side surface 21a and is engaged with the stopper portion 21 so as to be engageable with and disengageable from the shaft 11 is provided on the rear side, which is on the side of the front support member 7 opposite to the shaft 11. 11 is provided with a handle portion 22 that is rotated around the axis m. Further, on the back surface (front surface) of the edge portion of the outer vertical side 13a of the opening hole 13, there is provided a continuous surface 23a for continuing the outer vertical side 13a in the insertion direction of the stopper portion 21 and the outer vertical side 13a. A thick plate-shaped reinforcing member 23 for reinforcing the entire edge portion is joined and fixed. The stopper portion 21 is provided on the side of the outer vertical side 13a of the opening hole 13 so that the outer side surface 21a thereof can be smoothly slidably contacted with the outer vertical side 13a of the opening hole 13 and the continuous surface 23a of the reinforcing member 23. The outer surface 21a, which is formed by cutting out a thin wall, is formed into a tapered surface that gently converges the upper end side of the tip to a thickness near the center.

As shown in FIG. 1, the shaft 11 supports the shaft end 11b on the outer vertical side 13a side of the opening hole 13 above the shaft end 11a on the inner vertical side 13b side and on the front side. They are arranged in a slanted state so as to be positioned on the member 7 side, and the outer vertical side 13a of the opening hole 13 and the continuous surface 23a of the reinforcing member 23 with the insertion direction of the stopper 21, that is, clockwise rotation. The stopper portion 21 (outer side surface 21a) that slides in contact with the slide contact portion is displaced in the counterclockwise direction along the taper surface while the tip of the stopper portion 21 is opened. It is located on the side.

Therefore, in the above-described embodiment, the shaft 11 that rotatably supports the operation lever 12 around the axis m at the upper corner 5a on the front side of the side gate 4 is provided on the outer vertical side 13a side of the opening hole 13. The shaft end 11b is arranged in an inclined state so as to be positioned above the shaft end 11a on the inner vertical side 13b side and on the front support member 7 side, and the stopper portion 21 rotates clockwise. The sliding contact portion of the stopper portion 21 slidingly contacting the outer vertical side 13a of the opening hole 13 and the continuous surface 23a of the reinforcing member 23 is displaced counterclockwise along the tapered surface while the tip of the stopper portion 21 is opened. Since the stopper portion 21 is inserted so as to be positioned on the back surface side of the inner vertical side 13 b edge portion of the stopper 13, the stopper portion 21 includes the outer vertical side 13 a of the opening hole 13 of the front wall 1 b and the reinforcing member 23. Continuous surface 2 Each time the sliding contact resistance with respect to 3a decreases, the insertion amount in the insertion direction increases, and the sliding contact portion with respect to the outer vertical side 13a of the opening hole 13 and the continuous surface 23a of the reinforcing member 23 is displaced in the opposite insertion direction. Due to the positional deviation of the sliding contact portion of the stopper portion 21, the reduction of the sliding contact resistance due to the wear deformation of the sliding contact surfaces due to the repeated locking and unlocking operation is renewed from time to time and sufficiently secured. As a result, the stopper portion 21 is prevented from coming out of the opening hole 13 due to traveling vibration or the like, and the careless opening of the side gate 4 can be prohibited.

Moreover, the stopper portion 21 smoothly contacts the outer side surface 21a of the stopper portion 21 with the outer longitudinal side 13a of the opening hole 13 and the continuous surface 23a of the reinforcing member 23. The notched and thinly formed upper end side is formed into a taper surface that gently converges to a thickness near the center, so that the stopper portion 21 slides in contact with the insertion amount as the insertion amount increases in the insertion direction. If the part is displaced, the stopper portion 21 moves along the tapered surface toward the outer vertical side 13a of the opening hole 13 and the continuous surface 23a side of the reinforcing material 23, and the sliding contact resistance is slightly reduced. This can be ensured further by increasing the insertion amount of the stopper portion 21 in the proper insertion direction.

Next, a second embodiment of the present invention will be described with reference to FIG.

The second embodiment is a modification of the side gate lock device of the first embodiment. The same parts as those in the above embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

That is, in this example, the shaft 31 is a horizontal shaft extending parallel to the opening surface of the opening hole 13. Further, at the tip of the stopper portion 21, there is provided a projection 32 which engages so as to sandwich the outer vertical side 13a edge portion of the opening hole 13, that is, the reinforcing material 23 from the back surface side.

In this case, when the stopper portion 21 is rotated in the insertion direction by the protrusion 32 at the tip of the stopper portion 21, the edge of the outer vertical side 13 a of the opening hole 13 is sandwiched from the back side via the reinforcing material 23. Since the stopper portion 21 is engaged, the stopper portion 21 is prevented from slipping out of the opening hole 13 due to traveling vibration or the like, and the careless opening of the side gate 4 can be similarly prohibited.

It should be noted that the present invention is not limited to the above-described embodiments, but includes various other modifications. For example, in each of the above embodiments, the stopper portion 21 is provided on the outer side surface 21a of the operation lever 12 and slidably contacts the outer vertical side 13a of the opening hole 13. However, the stopper portion is provided on the inner side surface of the operation lever. May be slidably in contact with the inner vertical side of the opening hole and the continuous surface of the reinforcing material continuous to the inner vertical side. In this case, the shaft is located on the inner vertical side of the opening hole. The shaft ends are arranged in an inclined state so that they are positioned above the shaft ends on the outer vertical side and on the front support member side.

[Brief description of drawings]

FIG. 1 is a plan view of the vicinity of a front upper corner portion of a side gate when an operation lever according to a first embodiment is viewed from above.

FIG. 2 is a side view of the vicinity of a front upper corner portion of the side gate when the operation lever according to the first embodiment is viewed from the side.

FIG. 3 is a vertical cross-sectional front view of the operation lever according to the first embodiment cut near the shaft and viewed from the front of the vehicle body.

FIG. 4 is a side view of the packing box.

FIG. 5 is a view corresponding to FIG. 1 according to the second embodiment.

[Explanation of symbols]

 1 Packing Box 4 Side Gates 5a, 5b Upper Corners 7,8 Supporting Member 11,31 Shaft 11a Shaft End on Inner Vertical Side of Opening Hole 11b Shaft End on Outer Vertical Side of Opening Hole 12 Operation Lever 13 Opening Hole 13a Outer vertical side (one side vertical side) 13b Inner vertical side (other side vertical side) 14 Side gate lock device 21 Stopper portion 21a Outer side surface (one side surface) 22 Handle portion 32 Protrusion m Shaft center

Claims (2)

[Scope of utility model registration request] 1. Side gates which are openable and closable with the lower end as a fulcrum are provided on both sides of the luggage box, and are supported at upper and lower corners of the side gate rotatably around an axis of a shaft extending in the vehicle width direction. And a substantially rectangular opening hole is provided in the supporting member facing the upper and lower corners of the front and rear, and the operation lever is inserted into and engaged with the opening hole. In a side gate locking device for a dump truck, in which a side gate is locked so that it can be locked and unlocked, the operation lever is provided on the support member side with respect to the shaft, and one side surface with respect to one vertical side of the opening hole. A stopper portion that is inserted through the sliding contact with the shaft and is engaged and disengageably engaged, and a handle portion that is provided on the side opposite to the support member with respect to the shaft and that rotates the operation lever around the axis of the shaft. And the shaft is the stopper While the sliding contact portion of the stopper portion slidingly contacting the one side vertical side of the opening hole is displaced in the anti-insertion direction with the rotation of the stopper portion in the insertion direction, the tip of the stopper portion is moved vertically to the other side of the opening hole. In order to locate it on the back surface side of the edge portion, it is arranged in an inclined state in which the axial end on one vertical side of the opening is positioned above the axial end on the other vertical side and on the support member side. A side gate lock device for a dump truck, which is characterized in that 2. Side gates that are openable and closable with the lower end as a fulcrum are provided on both sides of the luggage box, and are supported at upper and lower corners of the side gates so as to be rotatable about an axis of a shaft extending in the vehicle width direction. And a substantially rectangular opening hole is provided in the supporting member facing the upper and lower corners of the front and rear, and the operation lever is inserted into and engaged with the opening hole. In a side gate locking device for a dump truck in which a side gate is locked so that it can be locked and unlocked, the operation lever is provided on the support member side with respect to the shaft, and one side of the opening hole extends vertically from the opening hole. A stopper part that is slidably inserted into one side while being slidably inserted and engages in a disengageable manner, and a handle that is provided on the side opposite to the support member with respect to the shaft and that rotates the operation lever around the axis of the horizontal shaft. With the department The axis is a horizontal axis extending parallel to the opening surface of the opening hole, and the end of the stopper portion is engaged with the vertical side edge of the opening hole from the back surface side. A side gate lock device for a dump truck, which is provided with a matching projection.