JP2006206306A - Door lock device of refuse-collecting vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door lock device enabling the easy vertical opening/closing operation of the rear door of a refuse-collecting vehicle. <P>SOLUTION: A lock means 50 locking the rear door 36 to both side wall parts 31 of a refuse throw-in box 30 at both closed and open positions is disposed at the inlet 35 of the refuse throw-in box 30 so that the rear door 36 can be vertically opened and closed between the closed position and the open position. A lock releasing means 60 manually releasing the locked state of the lock means 50 is installed at the side wall part (31) of the refuse throw-in box 30 at a specified height to which a worker is accessible. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a locking device for an up-and-down open / close rear door installed in a dust box of a garbage truck.

  In the garbage collection vehicle, a dust container is mounted on a vehicle frame, and a dust container is connected to a rear end opening of the dust container so as to be swingable in the vertical direction (for example, see Patent Document 1). The dust box has a dust inlet opening at the bottom of its rear surface and a rear door that closes the inlet so that it can be opened and closed. The rear door opens and closes between a closed position that closes the inlet and a release position that moves upward from the inlet and opens the inlet. Between the rear door and the dust box, a door lock device is provided for locking the rear door in the closed position and the release position. A conventional example of a garbage truck equipped with a door lock device will be described with reference to FIGS.

  FIGS. 8A and 8B show the rear part of the dust container 3 mounted on the vehicle frame 1. A dust input box 4 is connected to the rear end opening of the dust container 3 so as to be swingable in the vertical direction about the pivot 5. Inside the dust throwing box 4, a dust loading device (not shown) for compressing dust thrown from the outside and loading it into the dust container 3 is provided. An operator standing on the ground 6 throws the dust into the dust box 4. In addition, the code | symbol 2 of the figure is a wheel.

  The dust box 4 has both side wall portions 11 shown in FIGS. 9 and 10, and a top portion 12 and a bottom portion 13 that connect the upper and lower portions of the both side wall portions 11. An opening is formed between the rear edge portions of the side wall portions 11, and this opening becomes a dust inlet 15. The rear door 16 is installed in the insertion port 15 so that it can be opened and closed up and down. The rear door 16 opens and closes vertically between a closed position that closes the insertion port 15 in FIG. 8A and a release position in FIG. 8B that moves upward from the insertion port 15 to open the insertion port 15. Operate.

  The front ends of the pair of upper swing arms 17 are pivotally supported at the left and right ends of the upper portion of the rear door 16, and the front ends of the pair of lower swing arms 18 are pivotally supported at the left and right ends of the lower portion of the rear door 16. The rear end portions of the upper swing arm 17 and the lower swing arm 18 are pivotally supported by the support shafts provided on the side wall portions 11. A spring member 19 for urging the upper swing arm 17 in the counterclockwise direction in FIG. 8 is connected to each of the pair of left and right upper swing arms 17.

  Between the lower end part of the rear door 16 and the both side walls 11 of the dust box 4, the rear door 16 is automatically locked in the closed position in FIG. 8 (A) and the release position in FIG. 8 (B). A door lock device 20 is installed. A pair of left and right handles 21 and a pair of left and right lock release levers 22 for manually releasing the automatic lock of the door lock device 20 are disposed on the outer surface of the lower end portion of the rear door 16. FIG. 10 shows the door locking device 20 when the rear door 16 is in the closed position. The door lock device 20 manually opens the lock release lever 22 to retract the link 25, and pulls the lock pin 23 at the tip of the link 25 from the lock hole 24 provided at a fixed position on the side wall portion 11 of the dust input box. Unlock with. When the hand is released from the lock release lever 22, the lock pin 23 is automatically fitted into the lock hole 24 by the urging force of the return spring 26 attached to the lock pin 23 to be locked.

  When the rear door 16 in the closed position shown in FIGS. 9 and 10 is opened, the operator holds the pair of left and right grips 21 and the pair of unlocking levers 22 with both hands, and locks the lock pin against the urging force of the return spring 26. 23 is retracted. As a result, the engagement between the lock pin 23 and the lock hole 24 is released (lock release). In this state, when the operator slightly lifts the handle 21 with both hands and releases the handle 21, the rear door 16 is lifted as it is by the urging force of the spring member 19, and the upper swing arm 17 and the lower swing arm 18 are shown in FIG. 8 oscillates counterclockwise and the rear door 16 moves to the release position. When the rear door 16 is moved to the release position, a pair of lock pins 23 at both ends of the lower end of the rear door 16 are formed in lock holes (FIG. 10) formed at substantially intermediate height positions on both side wall portions 11 of the dust bin 4. Are inserted by the action of the return spring 26. As a result, the rear door 16 is automatically locked at the release position.

When closing the rear door 16 in the release position, hold the pair of left and right handles 21 and the lock release lever 22 of the rear door 16 locked in the release position in FIG. 8B with both hands, and hold the handle 21 in the unlocked state. Push down and lower the rear door 16 slightly. As a result, the force that the rear door 16 tries to descend by its own weight overcomes the upward biasing force of the spring member 19, and the rear door 16 slowly descends to the closed position. When the rear door 16 moves to the closed position, a pair of lock pins 23 at both ends of the lower end of the rear door 16 are inserted into the lock holes 24 of the side wall portions 11 by the action of the return springs 26 as shown in FIG. The rear door 16 is automatically locked at the closed position.
JP-A-10-29701

  The up-and-down open / close rear door 16 is stably locked by a pair of left and right door locking devices 20 at the closed position and the release position, respectively. However, when opening and closing the rear door 16 up and down, in order to unlock the pair of left and right door locking devices 20, the operator must hold the pair of left and right handles 21 and the lock release lever 22 with both hands. I must. Since the dust input port has a higher workability as the vertical height increases in addition to the lateral width, the height position of the rear door 16 in the release position is usually considerably high. When the rear door 16 is closed, the handle 21 is at a high position, so that the worker needs to hold the lock release lever 22 by placing his / her hands on the pair of left and right handles 21 in a graceful posture. The unlocking operation using both hands with the back stretched is inconvenient, and it may be difficult for an operator who is particularly short or has a weak grip.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a door lock device for a garbage truck that can easily open and close the rear door.

  The present invention can move up and down between a closed position that closes the charging port and a release position that opens upward from the charging port and closes the charging port provided in the dust charging box at the rear of the vehicle. The rear door is connected, and the rear door and the dust box are engaged with each other by spring means for urging the rear door upward, and when the rear door moves to the closed position and the release position, the rear door is automatically locked. In a garbage truck provided with a locking means having an engaging member and an engaged member, on the side wall of the dust container, the locking means is unlocked to release the engagement between the engaging member and the engaged member. It is characterized in that an unlocking operation means that is manually driven to a position via a connecting mechanism provided between the rear door and the dust box is provided.

  Here, the dust input box at the rear of the vehicle can be connected to the rear end opening of the dust storage box mounted on the vehicle frame so as to be swingable up and down. A charging port is formed in the lower part of the rear surface of the dust box, and a rear door that can be opened and closed is installed at the charging port. The rear door is opened and closed up and down by being guided by swinging arms that are connected to the upper and lower ends, or guide rollers (or pins) that are installed at both ends of the upper and lower ends. It can be applied to open and close up and down by being guided. In the rear door using this guide roller, the guide roller rolls on guide rails fixed on both sides of the dust inlet box to guide the lower ends of the rear door. An unlocking operation means is provided on one or both of the side wall portions of the dust box. When the unlocking operation means is provided on the both side walls, both the unlocking operation means can be connected to each other.

  As the unlocking operation means, a mechanical part such as an operation lever or an operation handle that can be operated by a worker with a one-touch operation and automatically returned by a return spring after the operation can be applied. Such an unlocking operation means has a simple structure and can be easily connected to a locking means comprising an engaging member and an engaged member. By disposing the unlocking operation means on the side wall of the dust bin, when closing the rear door that has been raised to the release position, the operator does not need to extend both hands to the rear door, and the side wall is unlocked. Since the unlocking operation may be performed by extending one hand to the operation means, the unlocking operation work when the rear door is opened and closed up and down can be easily and quickly performed. In addition, when a pair of left and right locking means is provided on the rear door, the unlocking of the pair of left and right locking means is simultaneously performed by one-hand operation of the common unlocking operation means, so that the unlocking of one of the pair of left and right locking means is performed. There is no problem of insufficient.

  In the present invention, the unlocking operation means can be arranged at a substantially middle height position of the side wall portion of the dust throwing box.

  Here, the substantially middle height position of the side wall portion of the dust input box is a height at which an operator who collects dust can easily reach the rear of the dust collection vehicle. By disposing the unlocking operation means at such a height position, even a short operator can easily operate the unlocking operation means with one hand.

  Further, in the present invention, a lock means for locking the rear door to the dust box at each of the closed position and the release position is provided with a pair of lock pins arranged so as to protrude and retract at both side ends of the rear door, and the dust A pair of lock holes formed on both side walls of the input box are provided, and the pair of lock pins can be unlocked by the unlocking operation means.

  Thus, by providing a pair of locking means on both side ends of the rear door and both side walls of the dust box, the locking strength of the rear door is stabilized at the closed position and the release position. Further, by manually operating the locking operation and the unlocking operation of the pair of locking means with the common unlocking operation means, the unlocking operation can be performed easily and quickly.

  In the present invention, guide rails that guide the vertical movement of the lower end of the rear door when opening and closing the door are fixed to both sides of the input port of the dust input box, and projecting and retracting to both side ends of the rear door. A guide roller that is guided by a corresponding guide rail and regulates the vertical movement direction of the lower end of the rear door can be attached to each of the pair of lock pins that can be arranged coaxially with each lock pin.

  Thus, by providing the lock pin of the pair of locking means and the guide roller for guiding the up / down opening / closing operation of the rear door coaxially, the lock pin and the guide roller having different functions can be arranged at the same location of the rear door. Simplify the door structure.

  Further, in the present invention, the locking means for locking the rear door to the dust input box at each of the closed position and the release position, the pair of lock holes formed at both side ends of the rear door, and the dust input box It is assumed that each side wall portion has a pair of lock pins arranged so as to protrude and retract, and the pair of lock pins can be unlocked by the unlocking operation means.

  Also in this case, the lock strength of the rear door is stabilized at the closed position and the release position by providing a pair of locking means on both side ends of the rear door and both side walls of the dust box. Further, by manually operating the locking operation and the unlocking operation of the pair of locking means with a common unlocking operation means, the unlocking operation can be performed easily and quickly.

  Since the door lock device of the present invention is provided with manual unlocking operation means on the side wall portion of the dust throwing box, it is related to the height of the rear door regardless of whether the rear door is in the closed position or the release position. The operator can easily operate the unlocking operation means at a level that can be easily reached by hand, and it is easy to operate with one hand, and the series of operations of unlocking the rear door and opening and closing the door is smooth. Thus, it is possible to achieve an excellent effect that it can be performed quickly.

  In addition, by unlocking the locking means deployed at multiple locations on the rear door by manual operation of the common unlocking operation means, it is possible to reliably unlock all of the multiple locking means at the same time. The occurrence of problems such as forcibly opening and closing the rear door with the means being insufficiently unlocked can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  The garbage truck shown in FIGS. 1 (A) and 1 (B) is applied to the garbage truck shown in FIG. 8, and the same or corresponding parts as those in FIG. . The refuse collection vehicle of FIG. 1 has a dust input box 30 having a dust loading device (not shown) inside at a rear end opening portion of a dust storage box 3 mounted on a vehicle frame 1 in a vertical direction with a pivot 5 as a fulcrum. Is connected to be swingable. A dust input port 35 is formed between the rear surface of the dust input box 30 and the lower part of the rear edges of the side wall portions 31. A rear door 36 is installed in the insertion port 35 so as to be opened and closed up and down. The rear door 36 opens and closes up and down between a closed position in FIG. 2 that closes the insertion port 35 and a release position in FIG. 3 that moves upward from the insertion port 35 to open the insertion port 35.

  The front ends of the pair of swing arms 37 are pivotally supported at both upper ends of the rear door 36. A rear end portion of the swing arm 37 is pivotally supported by a support shaft 38 fixed to the inside of the both side wall portions 21. The swing arm 37 is connected to a spring means 39 that urges counterclockwise in FIG. The spring means 39 corresponds to the spring member 19 of FIG. 8, and assists the upward opening movement of the unlocked rear door 36 as will be described later. Both ends of the cover 41 are fixed to the pair of left and right swing arms 37. The lower edge of the cover 41 is hinged to the upper edge of the rear door 36 and swings up and down integrally with the swing arm 37.

  Guide rollers 42 project from the lower ends of the rear door 36. The pair of left and right guide rollers 42 are fitted and inserted into a pair of left and right groove-shaped guide rails 43 fixed along both sides of the insertion port 35. The guide roller 42 rolls along the guide rail 43 when the rear door 36 is vertically opened and closed. FIG. 6 shows a cross section of the guide rail 43, and FIG. 7 shows the guide roller 42. When the rear door 36 opens and closes up and down, both ends of the upper end of the rear door 36 are guided by the swing arm 37 and both ends of the lower end are guided by the guide rail 43. As a result, the vertical opening / closing posture of the rear door 36 is stabilized. A handle 44 protrudes from the outer surface of the lower end of the rear door 36.

  When the rear door 36 moves to the closed position and the release position, it engages with the lower end of the rear door 36 and the dust throwing box side wall 31 and engages with an engagement member that automatically locks the rear door 36 to the side wall 31. A locking means 50 having a member is provided. The locking means 50 is connected via a connecting mechanism 70 to a manual unlocking operating means 60 installed at a predetermined height position on the outer surface of the one side wall portion 31 of the dust throwing box 30. Specific examples of the lock means 50 and the unlock operation means 60 are shown in FIGS.

  The locking means 50 has engaging members for a pair of left and right lock pins 51 projecting from both lower ends of the rear door 36 and engaged portions for pin holes 52 formed in both side wall portions 31 as shown in FIG. . Each of the pair of left and right lock pins 51 is supported by a mounting bracket 54 fixed to the rear door 36 via a return spring 53 so as to be movable in the axial direction.

  In this embodiment, the unlocking operation means 60 is a single operation lever installed at a substantially intermediate height position of the one side wall portion 31. The operation lever 60 is installed on the outer surface of the side wall portion 31 obliquely upward at a relatively low height position where a worker standing on the ground can easily reach. The operating lever 60 has an L shape, and the horizontal portion penetrates the side wall portion 31 in a rotatable manner. A swing plate 61 indicated by a broken line in FIG. 5 is fixed upward at the tip of the horizontal portion. The tip of the swing plate 61 and the pair of lock pins 51 are connected by a connecting mechanism 70.

  The coupling mechanism 70 includes a power transmission wire 71 along the inner side of the rear door 36, a T-shaped metal fitting 72 installed at the lower end of the rear door 36 so as to be vertically rotatable, a T-shaped metal fitting 72, and left and right lock pins. 51 has a wire 73 for connecting 51 (a rod can be substituted). One end of the power transmission wire 71 is connected to the swing plate 61, and the other end is connected to the T-shaped fitting 72. In FIG. 5, when the operation lever 60 is manually rotated from the solid line position to the chain line position, the swing plate 61 rotates clockwise in FIG. 5 to pull the power transmission wire 71, and the power transmission wire 71 is T-shaped. The metal fitting 72 is rotated clockwise about the support shaft 74 as a fulcrum. With this rotation, the left and right wires 73 move in a direction approaching each other, and the pair of left and right lock pins 51 retract (lock release operation). When the operation lever 60 is released, the entire connecting mechanism automatically returns to the original state by the urging force of the return spring 53 acting on the pair of left and right lock pins 51, and the rear door 36 can be automatically locked. Become.

  Guide rollers 42 shown in FIG. 7 are coaxially mounted on the left and right lock pins 51. The left and right guide rollers 42 roll the corresponding left and right guide rails 43. A pin hole 52 into which the lock pin 51 can be fitted is formed in each of the upper and lower portions of the guide rail 43.

  Next, the opening / closing operation | movement of the rear door 36 by above-described embodiment is demonstrated.

  When the rear door 36 in the closed position shown in FIG. 2 is opened, the operator operates the operation lever 60 with a single hand to rotate the control lever 60 clockwise at a constant angle in FIG. By this lever operation, the pair of lock pins 51 at the left and right ends of the lower portion of the rear door 36 in the closed position are simultaneously retracted, and are released from the corresponding pin holes 52 and simultaneously unlocked. By releasing the lock, the rear door 36 automatically starts to rise by the urging force of the spring means 39, and the urging force of the spring means 39 and the weight of the rear door 36 are balanced and stopped at an intermediate height position. As long as the rear door 36 starts to rise, the worker may release his hand from the operation lever 60. At this time, the guide roller 42 of the rear door 36 rolls on the guide rail 43 to guide the upward direction of the lower ends of the rear door 36, and the swing arm 37 swings counterclockwise in FIG. The upward direction of the upper ends of 36 is guided.

  As described above, when the rear door 36 rises to a height position intermediate between the closed position and the release position, the urging force of the spring means 39 and the weight of the rear door 36 are balanced and temporarily stopped at the half-open position. In this state, when the handle 44 of the rear door 36 is lightly pushed upward by hand, the rear door 36 is raised to the release position only by the urging force of the spring means 39. When the rear door 36 is opened to the release position shown in FIG. 3, a pair of left and right lock pins 51 are fitted into the pin holes formed in the upper portions of the left and right guide rails 43 by the spring force of the return spring 53, and the rear door 36 is automatically locked. Is done.

  Even when the rear door 36 of the release position is closed, the operator operates the operation lever 60 with one hand to rotate it at a constant angle in the clockwise direction in FIG. By this lever operation, the pair of left and right lock pins 51 of the rear door 36 in the release position are simultaneously retracted, and are unlocked simultaneously through the corresponding pin holes. When unlocked, the rear door 36 overcomes the upward biasing force of the spring means 39 and starts to descend due to its own weight, and the biasing force of the spring means 39 and the own weight of the rear door 36 are balanced at an intermediate height position. Stop. When the rear door 36 is lowered to some extent in this way, the worker can easily reach the handle 44. Therefore, when the worker holds the handle 44 with his hand and pushes the rear door 36 down lightly from this state, the rear door 36 descends to the closed position shown in FIG. Accordingly, the pair of left and right lock pins 51 are fitted into the pin holes 52 formed in the lower portions of the left and right guide rails 43 by the spring force of the return spring 53, and the rear door 36 is automatically locked.

In addition, the door locking device of the garbage truck of this invention is not limited to above-described embodiment. For example, the lock means is a pin hole formed on one or both side surfaces of the rear door and a lock pin disposed so as to be able to protrude and retract on either one or both side wall portions of the dust throwing box. You may make it drive by the manual operation of the lock release operation means installed in the side wall part via the connection mechanism. Note that the lock pin can be retracted by directly connecting the left and right lock pins and the operation member with two wires without using a T-shaped fitting for the connection mechanism.
In addition, the present invention is not limited to the two door configuration in which the rear door can be folded (the rear door 36 and the cover 41) as in the above-described embodiment, and the rear door as shown in FIG. Can be similarly applied to a structure in which a single sheet is supported by four left and right arms. Further, in the above embodiment, the operation lever is used as the unlocking operation means, but instead of the operation lever, a handle type unlocking operation member, a grip type unlocking operation member such as the unlocking lever 22 of FIG. Any operating member may be used.

(A) is a side view of the rear part of the vehicle showing an embodiment of the garbage truck according to the present invention, and (B) is a rear view. It is a partial expanded side view including the partial cross section of the dust input box in the refuse collection vehicle of FIG. It is a side view at the time of rear door release of the dust box of FIG. FIG. 3 is a rear view of the left half of the dust box of FIG. 2. It is an assembly drawing which shows the outline | summary of the door lock apparatus installed in the refuse input box of FIG. FIG. 5 is a partial enlarged cross-sectional view of the rear door and the dust box in FIG. 4. FIG. 5 is a partially enlarged view including a partially omitted portion of FIG. 4. (A) is a side view including a partially omitted portion of the rear part of a conventional garbage truck, and (B) is a side view when the rear door is released. FIG. 9 is a rear view of the dust box in the refuse collection vehicle of FIG. 8. It is a top view for demonstrating the locking device installed in the lower end part of the rear door of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle frame 3 Dust storage box 30 Dust input box 31 Side wall part 35 Input port 36 Rear door 37 Swing arm 38 Support shaft 39 Spring means 41 Cover 42 Guide roller 43 Guide rail 44 Handle 50 Lock means 51 Lock pin 52 Pin hole 54 Mounting bracket 60 Operation lever (lock release operation means)
61 Oscillating plate 70 coupling mechanism 71 power transmission wire 72 T-shaped fitting 73 rod 74 support shaft

Claims (5)

The rear door is connected to the dust inlet provided in the dust box at the rear of the vehicle so that it can move up and down between a closed position that closes the inlet and a release position that moves upward from the inlet and opens the inlet. A spring means for urging the rear door upward to the rear door and the dust box, and a mechanism for automatically locking the rear door by engaging with each other when the rear door moves to the closed position and the release position. In a garbage truck provided with locking means having a combined member and an engaged member,
A connecting mechanism disposed between the rear door and the dust bin in the side wall portion of the dust bin in a lock release position for releasing the engagement between the engaging member and the engaged member. The door lock device of the garbage truck is provided with an unlocking operation means that is manually driven through the waste collection vehicle.   2. The door lock device for a dust collecting vehicle according to claim 1, wherein the unlocking operation means is arranged at a substantially middle height position of the side wall portion of the dust throwing box.   The lock means can be fitted with a pair of lock pins arranged so as to be able to protrude and retract at both side end portions of the rear door, and the pair of lock pins formed on both side wall portions of the dust box. 3. The door lock device for a garbage truck according to claim 1, further comprising: a pair of lock holes, wherein the pair of lock pins is unlocked by the unlock operation means.   Guide rails that guide the vertical movement of the lower end of the rear door when the door is opened and closed are fixed to both sides of the input port of the dust box, and each of the pair of lock pins is guided by the corresponding guide rail. The door locking device for a garbage truck according to claim 3, wherein a guide roller for restricting the vertical movement direction of the lower end of the rear door is mounted coaxially with each lock pin.   The locking means includes a pair of lock holes formed on both side ends of the rear door, and a pair of lock holes provided on both side walls of the dust throwing box so as to protrude and retract respectively. The door lock device for a garbage truck according to claim 1 or 2, further comprising a pair of lock pins that can be inserted, and the pair of lock pins being unlocked by the unlock operation means.

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