JP4723928B2 - Hand guide roller - Google Patents

Description

  The present invention relates to a hand guide roller used for compaction of a road surface.

  The hand guide roller is a relatively small non-boarding type vehicle in a compacting machine that compacts the road surface with a rolling wheel, and is used for compaction of asphalt pavement rolling, road shoulders, narrow alleys, and the like. In general, as shown in FIG. 8, the hand guide roller is located at a pair of front and rear rolling wheels 51, a traveling machine body 52 mounted on the upper part of the rolling wheel 51, and mounted with an engine, a hydraulic pump, etc., and a rear part of the traveling machine body 52. It is configured to include a control rod 53 that is attached and extends obliquely upward and rearward when in use, and stands up substantially vertically when stored, and a forward / reverse lever 54 that is attached around the tip of the control rod 53. During construction, when the forward / reverse lever 54 is tilted forward (F side), it moves forward, and when it is tilted backward (R side), it moves backward (see, for example, Patent Document 1).

Usually, the hand guide roller is loaded on a truck bed and transported to a construction site. FIG. 8 is an explanatory view showing a process of loading the hand guide roller on the truck bed. (A) has shown the state put on the lift which advanced the hand guide roller and descended. Then, by raising the lift and tilting the forward / reverse lever 54 to the F side, the hand guide roller is moved forward from the lift to the truck bed. At that time, as shown by the dotted line in FIG. If 53 remains in use, the forward / reverse lever 54 cannot be reached from the ground or lift. Accordingly, as indicated by the solid line in FIG. 5B, the operator on the lift moves the forward / reverse lever 54 to the F side while the control stick 53 is stored in a substantially vertical shape, so that the hand guide roller is advanced to the truck bed. Move.
JP 2001-193010 A

  When the control stick 53 is in use, the hand guide roller moves forward when the forward / reverse lever 54 is tilted forward, and moves backward when the lever 54 is tilted backward. However, as can be seen from FIG. 8B, in the state where the control stick 53 is retracted, the tilting directions of the F-side and R-side levers 54 are downward and upward, respectively. When the vehicle is moved forward and tilted upward, the operation mode is reverse. For this reason, depending on the operator who is not accustomed, the relationship between the vertical operation of the forward / reverse lever 54 and the forward / backward movement is difficult to understand sensuously, and an erroneous operation may occur. In particular, when the forward / reverse lever 54 is accidentally tilted upward from the state shown in FIG. 8B, the hand guide roller may move backward and fall from the lift.

  The present invention was devised to solve such problems, and is a hand guide roller that can reduce erroneous operation of forward and backward movement when the control stick is stored, particularly when loading or unloading a truck. The purpose is to provide.

  In order to solve the above-mentioned problems, the present invention is attached to a traveling machine body, and is connected to a forward / reverse switching mechanism for switching forward / reverse of the traveling machine body, and a rear part of the traveling machine body. A hand guide roller provided with a control stick extended and stood substantially vertically when retracted, and a forward / reverse lever attached around the tip of the control stick and operating the forward / reverse switching mechanism via a control cable Thus, the hand guide roller is characterized in that the forward / reverse switching mechanism is operable and an auxiliary forward / reverse lever mechanically interlocked with the forward / reverse lever is provided on a side surface of the traveling machine body.

  According to this hand guide roller, when the hand guide roller is run on the truck bed while the control stick is stored, the operator runs the hand guide roller by operating the auxiliary forward / reverse lever from the ground without getting on the truck bed. be able to. Since the auxiliary forward / reverse lever is provided not on the movable control stick but on the traveling machine body, the tilting direction of the forward / reverse movement is not changed, and therefore the operator's forward / backward misoperation is hardly caused. Since the auxiliary forward / reverse lever is mechanically interlocked with the forward / reverse lever, for example, when starting the rolling operation after operating the auxiliary forward / reverse lever, the relationship between the position of the forward / reverse lever and the forward / reverse switching mechanism Is normal and there is no deviation between the two.

  In addition, the present invention provides a hand guide roller in which the auxiliary forward / reverse lever is provided detachably with respect to the traveling machine body so as to protrude from the side surface of the traveling machine body only during operation.

  According to this hand guide roller, by removing the auxiliary forward / reverse lever at the time of rolling operation, the side of the traveling machine body can be made the same as around the original side surface, which may hinder the rolling operation. Absent.

  In the present invention, the forward / reverse switching mechanism includes a control arm that rotates by a push-pull operation of the control cable to change the flow direction of the hydraulic oil in the hydraulic pump, and the auxiliary forward / reverse lever Is a hand guide roller that is connected to the control arm.

  According to this hand guide roller, since the forward / reverse switching mechanism can be operated with a simple structure while mechanically interlocking the auxiliary forward / reverse lever with the forward / reverse lever, the assemblability around the auxiliary forward / reverse lever is improved.

  According to the present invention, the hand guide roller is characterized in that the auxiliary forward / reverse lever and the control arm are connected via a link mechanism.

  According to this hand guide roller, even when the auxiliary forward / reverse lever and the control arm are connected by the cable, even if the auxiliary forward / backward lever is slightly tilted, there is no so-called “play”. The control arm can be rotated by following a slight tilt angle of the auxiliary forward / reverse lever. Therefore, the hand guide roller can run at a low speed on the truck bed.

  ADVANTAGE OF THE INVENTION According to this invention, the erroneous operation of the forward / backward movement of the hand guide roller can be prevented at the time of loading or unloading of the hand guide roller with respect to the truck bed.

  1A and 1B are a plan view and a side view of a hand guide roller according to the present invention, respectively. The traveling machine body 1 of the hand guide roller H is equipped with an engine E, a hydraulic pump P, and the like serving as a traveling drive source, and includes a pair of front and rear rolling wheels 2 at the lower part. When the engine E is driven, pressure oil flows from the hydraulic pump P to a hydraulic motor (not shown) in the rolling wheel 2 so that the rolling wheel 2 rotates and the hand guide roller H travels.

  A control stick 3 is attached to the rear part of the traveling machine body 1, and a handle 4 and an operation panel part 5 held by an operator are provided at the tip of the control stick 3. The control stick 3 is attached to the traveling machine body 1 so as to be rotatable about an axis in the vehicle width direction. The control stick 3 is used in a state of extending obliquely upward and rearward when used for compaction work or the like, and is substantially vertical when stored. It has a structure that can stand up. On the upper surface of the operation panel 5, there is provided a forward / reverse lever 6 which moves forward when the hand guide roller H is tilted forward from the neutral position in the state of use, and reverses when tilted backward. Inside the control stick 3, a tilting center shaft 6a having an axial direction in the vehicle width direction is formed in the vicinity of the lower portion of the forward / reverse lever 6. The forward / backward lever 6 tilts back and forth around the tilting center shaft 6a. To do. One end of a control cable 7 is connected to the lower end of the forward / reverse lever 6. That is, when the forward / reverse lever 6 is tilted forward, the control cable 7 is pulled backward, and when the forward / backward lever 6 is tilted backward, the control cable 7 is pushed forward. The other end of the control cable 7 is connected to a control arm 13 of a forward / reverse switching mechanism 8 described in detail later. The control cable 7 is covered with a covering tube over almost the entire length.

  The main feature of the present invention is that an auxiliary forward / reverse lever 14 that can operate the forward / reverse switching mechanism 8 and mechanically interlocks with the forward / reverse lever 6 is provided on the side surface of the traveling machine body 1. The forward / reverse switching mechanism 8 is a mechanism attached to the traveling machine body 1 and is connected to the other end of the control cable 7, and has a function of switching the forward / backward movement of the traveling machine body 1 by a push-pull operation of the control cable 7. The mechanism part which has this.

  FIG. 2 is an explanatory plan view showing the forward / reverse switching mechanism 8 and the auxiliary forward / backward lever 14 and the like, and FIGS. 3 and 4 are side explanatory views when viewed from the A direction and the B direction in FIG. 2, respectively (FIG. 4). Is partially shown in cross section). In FIG. 2, the hydraulic pump is omitted. 4A shows a state where the auxiliary forward / reverse lever 14 is attached, and FIG. 4B shows a state where it is removed. FIG. 5 is an external perspective view showing the periphery of the forward / reverse switching mechanism 8 and the auxiliary forward / reverse lever 14.

  From the viewpoint of easiness of viewing, mainly referring to FIG. 5, reference numeral 9 is a member constituting a part of the traveling machine body 1 (FIG. 1), and includes an engine E (FIG. 1) and a hydraulic pump P. The support plate which mounts is shown. A pair of left and right side plates 10 are attached to both sides of the support plate 9 via vibration-proof rubber (not shown), and the rolling wheel 2 (FIG. 1) is attached to the side plate 10 via a bracket (not shown) and a hydraulic motor. It is done.

  A hydraulic pump P is attached to the upper surface of the support plate 9 via a bracket 11. The hydraulic pump P is, for example, a known swash plate type variable displacement piston pump. A control shaft 12 for changing the angle of a swash plate (not shown) in the hydraulic pump P protrudes vertically from the lower portion of the hydraulic pump P, and is disposed horizontally at the lower end of the control shaft 12. The base end side of the control arm 13 is fixed. The other end of the control cable 7 is connected to the distal end side of the control arm 13. In the present embodiment, the control shaft 12 and the control arm 13 constitute the forward / reverse switching mechanism 8.

  As described above, when the forward / reverse lever 6 (FIG. 1) is tilted forward, the control arm 13 is rotated in the S direction by pulling the control cable 7, and the control shaft 12 is also rotated in the S direction. The rotation of the control shaft 12 causes a swash plate (not shown) in the hydraulic pump P to rotate in one direction and an angle corresponding to the rotation angle of the control shaft 12. Is supplied to a hydraulic motor (not shown). When the forward / reverse lever 6 (FIG. 1) is tilted backward, the control arm 13 is rotated in the T direction by the control cable 7 being pushed, and the control shaft 12 is also rotated in the T direction. The rotation of the control shaft 12 causes a swash plate (not shown) in the hydraulic pump P to rotate in the other direction and an angle corresponding to the rotation angle of the control shaft 12, so that the flow direction of the pressure oil becomes the reverse direction, and accordingly. Is supplied to a hydraulic motor (not shown).

  In the present embodiment, the auxiliary forward / reverse lever 14 is connected to the control arm 13, specifically, the control arm 13 is connected via the link mechanism 17. Moreover, in this embodiment, it is set as the structure which provided the auxiliary | assistant forward / reverse lever 14 so that attachment or detachment was possible with respect to the traveling body 1 so that it might protrude from the side surface of the traveling body 1 (FIG. 1) only at the time of operation.

  The auxiliary forward / reverse lever 14 is a straight bar-shaped member, and one end side constitutes a gripping portion 14a to be gripped by an operator, and the other end side constitutes an attaching / detaching portion 14b attached to and detached from the lever mounting member 15. The attaching / detaching portion 14b is formed as a fitting hole 14c formed by a square hole that opens toward the outside in the axial direction of the auxiliary forward / reverse lever 14, and the fitting hole 14c is inserted into one end of the lever attaching member 15 of a rectangular plate material. By engaging, the auxiliary forward / reverse lever 14 is connected to the control arm 13 and the forward / reverse switching mechanism 8 can be operated. When attached to the lever attachment member 15, the auxiliary forward / reverse lever 14 is positioned horizontally, and is orthogonal to the side surface of the traveling machine body 1 (FIG. 1) in the neutral position. In FIG. 1, reference numeral 1a denotes a cover that covers the hydraulic pump P, the forward / reverse switching mechanism 8 and the like, and the auxiliary forward / reverse lever 14 is connected to the lever mounting member 15 (not shown) through a notch 1b formed on the side surface of the cover 1a. Figure 5).

  In this embodiment, the auxiliary forward / reverse lever 14 is provided with a ball notch mechanism 16 having a ball 16a slightly protruding into the fitting hole 14c by the urging force of the spring 16b as shown in FIG. Further, the engagement / disengagement operation of the ball 16a with respect to the engagement hole 15a formed in the lever attachment member 15 gives a feeling of moderation when the auxiliary forward / reverse lever 14 is attached / detached.

  The link mechanism 17 will be described. The base end of the lever mounting member 15 is fixed to the lower end of the rotary shaft 18 positioned vertically. As can be clearly understood from FIG. 4, the rotary shaft 18 is positioned and supported by a support bracket 20 via a collar 19 so as to be rotatable around a vertical axis. A rotary arm 21 is fixed to the upper end of the rotary shaft 18, and a washer 22 is attached to the middle of the rotary shaft 18, and the collar 19 is sandwiched between the rotary arm 21 and the washer 22. Thus, the movement of the rotary shaft 18 in the vertical direction is restricted. In FIG. 5, one end of a rod 24 is connected to a pivot 23 formed at the tip of the rotary arm 21 so as to be rotatable about a vertical axis. The other end of the rod 24 is coupled to a pivot portion 25 formed on the control arm 13 so as to be rotatable about the vertical axis. The pivot portion 25 is formed on the same side as the side where the control cable 7 is connected to the control shaft 12.

  In addition, regarding the attachment of the support bracket 20 to the support plate 9, if the structure is such that the bolt 26 is fastened together with the bracket 11 for the hydraulic pump P, the assemblability is excellent. Further, if the pivot portions 23 and 25 are constituted by spherical bearings or the like, assembly errors of the link mechanism 17 can be absorbed.

  The link mechanism 17 is configured as described above. In FIG. 2, when the auxiliary forward / reverse lever 14 is tilted forward (F side), the rotary arm 21 fixed to the rotary shaft 18 rotates counterclockwise in FIG. By rotating, the pivot portion 23 rotates counterclockwise about the rotation shaft 18, and the control arm 13 rotates clockwise via the pivot portion 25 by the link action of the rod 24. That is, in FIG. 5, the control arm 13 and the control shaft 12 rotate in the S direction, and as described above, the rotation of the control shaft 12 in the S direction changes the flow direction of the pressure oil to the forward direction, and accordingly. Is supplied to a hydraulic motor (not shown). Of course, when the control arm 13 rotates in the S direction, the forward / reverse lever 6 (FIG. 1) falls to the forward side via the control cable 7.

  In FIG. 2, when the auxiliary forward / reverse lever 14 is tilted backward (R side), the rotating arm 21 fixed to the rotating shaft 18 rotates clockwise in FIG. The control arm 13 rotates clockwise around the rotation shaft 18, and the control arm 13 rotates counterclockwise via the pivot portion 25 by the link action of the rod 24. That is, in FIG. 5, the control arm 13 and the control shaft 12 rotate in the T direction, and as described above, the rotation of the control shaft 12 in the T direction changes the flow direction of the pressure oil to the reverse direction, and accordingly. Is supplied to a hydraulic motor (not shown). As the control arm 13 rotates in the T direction, the forward / reverse lever 6 (FIG. 1) is tilted backward via the control cable 7.

  As described above, if the forward / reverse switching mechanism 8 is operable and the auxiliary forward / reverse lever 14 mechanically interlocked with the forward / reverse lever 6 is provided on the side surface of the traveling machine body 1, FIG. When the hand guide roller H is run on the truck bed with the control stick 3 retracted as shown in the explanatory diagram when the cargo bed is viewed from the rear), the operator does not get on the cargo bed for assistance from the ground. The hand guide roller H can be run by operating the forward / reverse lever 14. Since the auxiliary forward / reverse lever 14 is provided not on the movable control stick 3 but on the traveling machine body 1, its forward / reverse tilting direction is unchanged, and therefore, an operator's forward / reverse erroneous operation hardly occurs. . Since the auxiliary forward / reverse lever 14 is mechanically interlocked with the forward / reverse lever 6 (FIG. 1), for example, when the rolling operation is started after the auxiliary forward / reverse lever 14 is operated, the position and forward / backward position of the forward / reverse lever 6 are determined. The relationship with the advance switching mechanism 8 is normal, and there is no deviation between the two.

  Further, as in the present embodiment, if the auxiliary forward / reverse lever 14 is provided so as to be detachable from the traveling machine body 1 so as to protrude from the side surface of the traveling machine body 1 only at the time of operation, the auxiliary forward / reverse lever 14 is assisted during rolling operation. By removing the forward / reverse lever 14 for use, the side surface of the traveling machine body 1 can be made the same as the original side surface, and the rolling work is not hindered.

  Further, in the configuration in which the forward / reverse switching mechanism 8 has a control arm 13 that rotates by the push-pull operation of the control cable 7 and changes the flow direction of the hydraulic oil of the hydraulic pump P, the auxiliary forward / reverse lever 14 is provided on the control arm 13. Since the forward / reverse switching mechanism 8 can be operated while the auxiliary forward / reverse lever 14 is mechanically interlocked with the forward / reverse lever 6 with a simple structure, the assembling property around the auxiliary forward / reverse lever 14 is facilitated. Becomes better.

  In particular, if the auxiliary forward / reverse lever 14 and the control arm 13 are connected via the link mechanism 17, the forward / reverse switching mechanism 8 with respect to the tilt angle of the auxiliary forward / reverse lever 14 is compared with the case where the auxiliary forward / reverse lever 14 is connected. The operating response is improved. In other words, in connection with a cable, so-called “play” occurs due to the looseness of the cable and a non-response area is likely to be generated in response to a slight movement of the lever. Even if the lever 14 is tilted slightly, the control arm 13 can be rotated by following the slight tilt angle of the auxiliary forward / reverse lever 14 as much as there is no “play”. This means that the hand guide roller H can be driven at a low speed, and can be said to be an especially important feature when the hand guide roller H is driven on a truck bed.

  Further, when the auxiliary forward / reverse lever 14 is detachable, the storage portion 27 of the auxiliary forward / reverse lever 14 when removed is, for example, the upper portion of the cover 1a as shown in FIG. FIG. 7 is an external perspective view showing a structural example of the storage unit 27. A small-diameter portion 14 d is formed in the middle of the auxiliary forward / reverse lever 14 in the axial direction. The storage portion 27 is attached to a rectangular plate-like pedestal 28 fastened and fixed to the upper surface of the cover 1a (FIG. 1) by bolts, and a small-diameter portion 14d of the auxiliary forward / reverse lever 14 in the lateral direction. And the engagement plate 29 having a notch engagement hole 29a that can be inserted through and a fitting plate 30 that can be fitted into the fitting hole 14c of the auxiliary forward / reverse lever 14. When the auxiliary back and forth lever 14 is stored in the storage portion 27, as shown in FIG. 7A, the small diameter portion 14d of the auxiliary back and forth lever 14 is cut out from the lateral direction into the engagement hole 29a. Thereafter, the auxiliary forward / reverse lever 14 is moved in the axial direction to fit the fitting hole 14c and the fitting plate 30 (state shown in FIG. 7B). According to such a storage form, it becomes the storage part 27 of a simple structure, and is excellent also in assembling property.

  In the foregoing, the optimum embodiment of the present invention has been described. The described embodiment is a type in which the hand guide roller H is mounted with the hydraulic pump P, and the control cable 13 is rotated by rotating the control arm 13 of the hydraulic pump P, and the control cable push-pull operation is performed. The present invention can also be applied to a type in which the clutch (multi-plate clutch) is operated to switch forward and backward. In that case, the structure around the clutch corresponds to the “forward / reverse switching mechanism” of the present invention. Alternatively, the auxiliary forward / reverse lever 14 may be provided on both side surfaces of the traveling machine body 1. In that case, the auxiliary forward / reverse levers 14 may be connected by a link mechanism or the like. Of course, as long as the two auxiliary forward / reverse levers 14 and the forward / reverse lever 6 are linked to each other, the connection mode is not limited to the link mechanism. In addition, the present invention is not limited to what is described in the drawings, and design changes can be made as appropriate without departing from the spirit of the present invention.

(A), (b) is the top view and side view of the hand guide roller which concern on this invention, respectively. It is a plane explanatory view showing the back and forth switching mechanism and the auxiliary back and forth lever. It is side surface explanatory drawing at the time of seeing from the A direction in FIG. It is side surface explanatory drawing at the time of seeing from the B direction in FIG. 2, (a) shows the state which attached the back-and-forth advance lever for assistance, and (b) shows the state removed. It is an external appearance perspective view which shows the forward / reverse switching mechanism and the auxiliary forward / reverse lever. It is explanatory drawing at the time of seeing the loading platform of a truck from back. It is an external appearance perspective view which shows one structural example of the accommodating part of the auxiliary | assistant back-and-forth advance lever, (a), (b) shows the state before the accommodation of the auxiliary forward-reverse lever and after the accommodation, respectively. It is explanatory drawing which shows the process in which a hand guide roller is loaded on the loading platform of a truck.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling machine body 2 Rolling wheel 3 Control stick 6 Forward / reverse lever 7 Control cable 8 Forward / reverse switching mechanism 13 Control arm 14 Auxiliary forward / reverse lever 17 Link mechanism E Engine H Hand guide roller P Hydraulic pump

Claims (4)

A forward / reverse switching mechanism that is attached to the traveling machine body and switches forward / reverse of the traveling machine body;
A control stick that is attached to the rear part of the traveling machine body, extends obliquely upward to the rear at the time of use, and stands up in a substantially vertical shape at the time of storage,
A forward / reverse lever attached to the periphery of the control stick and operating the forward / reverse switching mechanism via a control cable;
A hand guide roller capable of operating the forward / reverse switching mechanism and having an auxiliary forward / reverse lever mechanically interlocked with the forward / reverse lever provided on a side surface of the traveling machine body.   2. The hand guide roller according to claim 1, wherein the auxiliary forward / reverse lever is provided detachably with respect to the traveling machine body so as to protrude from a side surface of the traveling machine body only during operation. The forward / reverse switching mechanism has a control arm that rotates by a push-pull operation of the control cable to change the flow direction of the hydraulic oil in the hydraulic pump,
The hand guide roller according to claim 1, wherein the auxiliary forward / reverse lever is connected to the control arm.   The hand guide roller according to claim 3, wherein the auxiliary forward / reverse lever and the control arm are connected via a link mechanism.

Images