JP5300683B2 - Hand guide roller reverse stop device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for halting the backward movement of a hand guide roller which can reduce an operating force of a backward movement halting rod while improving operability. <P>SOLUTION: A handle 10 is mounted to a rear part of the hand guide roller, and a travel lever 14 is mounted tiltable in forward and backward directions at a lever mounting frame 12 provided at the tip of the handle 10. The backward movement halting rod 15 for an urgent halt by pressing the travel lever 14 forward when moving backward is mounted movably in forward and backward directions at the lever mounting frame 12 in such a way as to protrude backward. A pressing force direction converting member 45 for converting a forward pressing force of the backward movement halting rod 15 into a rotational force in a direction raising the travel lever 14 in a backwardly tilted attitude is rotatably mounted to the lever mounting frame 12. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention prevents the operator from being caught between the hand guide roller and an obstacle during reverse travel in a hand guide roller that performs rolling of the pavement surface, compaction of the road surface, and the like by the rolling rollers attached to the front and rear of the vehicle body. The present invention relates to a reverse stop device.

  The hand guide roller is provided with small compaction rollers before and after the fuselage, and is used for initial compaction of asphalt pavement and compacting of relatively narrow road surfaces and sites. In conventional hand guide rollers, in general, the hydraulic pump is driven by an engine mounted on the airframe, and the hydraulic motor for the compaction roller is driven forward by hydraulic oil discharged from the hydraulic pump, and the hand guide roller is driven forward and backward by driving backward. Let

  The hydraulic pump switches the hydraulic oil discharge direction to normal or reverse by tilt angle control, or switches the hydraulic motor rotation direction to normal or reverse, or stops the forward movement of the hand guide roller. Stop. As described in Patent Document 1, the hand guide roller has a handle that is obliquely extended rearward from the vehicle body, and a travel operation lever (hereinafter referred to as a travel lever) that controls forward / backward movement and stop at the tip of the handle. And an operation lever (hereinafter referred to as an accelerator lever) for controlling starting and stopping of the engine.

  For such a hand guide roller, an operation device for traveling or the like as shown in FIG. 10 is generally used. In FIG. 10, reference numeral 62 denotes a rectangular tube-like handle attached obliquely to the rear part of the body (not shown) of the hand guide roller. Reference numeral 63 denotes a lever mounting frame welded to the tip of the handle 62. The lever mounting frame 63 has a vertical plate portion 64 for lever mounting. Reference numeral 65 denotes a travel lever. The travel lever 65 is attached to a base plate portion 65a of the travel lever 65 so as to be rotatable in the front-rear direction about the shaft 66. 67 is a wire for controlling the tilt angle of the hydraulic pump. This wire 67 has a rear end connected to a lower end portion of the base frame portion 65a of the travel lever 65 by a connecting tool 68, and a front end connected to a roller for driving the pressure roller. It is connected to a tilt angle control lever (both not shown) provided in the hydraulic pump.

  In FIG. 10, a, b, and c indicate states at the neutral, forward, and reverse operation positions of the traveling lever 65, respectively. In the neutral position a, the tilt angle control lever of the hydraulic pump is in the intermediate position, and no hydraulic oil is discharged from the hydraulic pump. When the travel lever 65 is operated to the forward position b, tension is applied to the wire 67, and the tilt angle control lever is pulled to operate the hydraulic motor for the pressure roller from the hydraulic pump in the forward (forward) direction. Hydraulic fluid is discharged into the tank. When the travel lever 65 is operated to the reverse position c, a pressing force is applied to the wire 67, and the tilt angle control lever is pressed to operate the hydraulic motor for the pressure roller from the hydraulic pump in the reverse (reverse) direction. Hydraulic fluid is discharged into the tank.

  This traveling operation device includes a reverse stop rod 70 as a safety device for reverse travel. The reverse stop rod 70 is inserted into the cylindrical holding member 71 so as to be movable back and forth, and returns the travel lever 65 from the reverse position c to the neutral position a to urgently stop the hand guide roller. The holding member 71 is composed of a cylinder attached to a lever attachment frame 63 and a handle 72 attached to the lever attachment frame 63. A knob 70 a is attached to the rear end portion of the reverse stop rod 70, and a compression spring 73 for preventing rattling is interposed between the knob 70 a and the holding member 71.

  In this travel operation device, when the travel lever 65 is operated to the reverse position c to move the hand guide roller backward, there is an obstacle on the back of the operator and the operator is caught between the knob 70a and the obstacle, When the operator pushes the knob 70a forward, the base frame portion 65a of the travel lever 65 is pushed by the reverse stop rod 70, the travel lever 65 rotates forward, the hand guide roller stops, and the occurrence of an accident is prevented. .

JP 2000-27115 A

  In the conventional operation device, the traveling lever 65 is attached to the shaft 66 with an appropriate rotational resistance so that the operation can be performed even when the operator removes the hand from the traveling lever 65 and grasps the handle 72. It is done. In order to provide this rotational resistance, for example, a disc spring (not shown) is interposed between a washer (not shown) attached to the shaft 66 and the base frame portion 65a, and the disc spring is attached to the base frame portion 65a by a screw. A structure such as pressing against the side of the is adopted. Such rotation resistance is set so that the traveling lever 65 does not return to the original neutral position even when the vibration roller is vibrated by the vibration generator and the vibration is applied to the handle 62. It has been adjusted to be about the weight.

  In this operating device, when it is necessary to make an emergency stop during reverse travel, it is necessary to push the knob 70a and thereby return the traveling lever 65 to the neutral position. Here, when the vehicle travels backward, the travel lever 65 is tilted backward, while the reverse travel stop rod 70 is mounted horizontally and pushed horizontally, so that when the travel stop 65 is pushed by the reverse travel stop rod 70, Will push the base frame portion 65a of the travel lever 65 diagonally. For this reason, it is necessary to push the reverse stop rod 70 with a force F much larger than the force Fx required to rotate the traveling lever 65, and specifically, for example, F / Fx≈1.4. Further, the force required for the operation will be described with specific numerical values. The lever ratio (the length of the travel lever 65 and the distance from the axial center of the shaft 66 to the contact portion P between the reverse stop rod 70 and the base frame portion 65a). If the force required to operate the travel lever 65 is 3 kg, Fx is 15 kg and F is 21 kg. With the conventional configuration, the operating force of the reverse stop rod 70 becomes heavy, There was a problem that the nature was bad.

  In view of the above problems, an object of the present invention is to provide a reverse stopping device for a hand guide roller which can reduce the operating force of a reverse stopping rod and has improved operability.

The reverse movement stopping device of the hand guide roller according to claim 1 has a handle attached to a rear portion of the hand guide roller, and a travel lever is attached to a lever mounting frame provided at a tip of the handle so as to be tiltable in the front-rear direction. In the backward stop device of the hand guide roller, the reverse stop rod that pushes the traveling lever forward to make an emergency stop at the time of reverse drive is attached to the lever mounting frame so as to protrude backward and move forward and backward.
A pressing force direction changing member that converts a pressing force forward of the reverse stop rod during a reverse emergency stop into a turning force in the standing direction of the traveling lever in a backward tilting posture can be rotated on the lever mounting frame. to install and co-in,
The distance from the axial center of the mounting shaft of the pressing force direction changing member to the operating point to the receiving member provided on the travel lever is the distance from the axial center of the mounting shaft of the pressing force direction changing member to the reverse stop rod. It is characterized by being shorter than the distance to the power point .

The hand guide roller reverse stop device according to claim 2 is the hand guide roller reverse stop device according to claim 1,
A vertical plate portion is provided on the lever mounting frame, and a base frame portion of a travel lever is pivotally attached to a pivot shaft provided on the vertical plate portion,
The base frame portion is provided with a receiving member in which a cross-sectional shape of at least a portion with which the pressing force direction changing member abuts forms an arc shape,
The pressing force direction changing member is made of a plate material whose front and rear width is increased toward the lower portion, and the upper portion of the pressing force direction changing member is provided behind and above the mounting position of the pivot shaft of the vertical plate portion. Pivot on the mounting shaft,
In the lower part and rear part of the pressing force direction changing member, a force point with the reverse stop rod is provided,
The inclined front side of the pressing force direction changing member is a contact side with respect to the receiving member.

  According to the first aspect of the present invention, the lever mounting frame is provided with the pressing force direction changing member for converting the pressing force forward of the reverse stop rod into the rotational force in the standing direction of the traveling lever. It is possible to effectively transmit the forward pressing force of the reverse stop rod acting on the pressure direction changing member as the turning force of the traveling lever in the backward inclined posture. For this reason, the operating force required to push the reverse stop rod forward when the reverse stop is stopped in an emergency is smaller than in the prior art, and the operability is improved.

In addition, the distance from the mounting axis of the pressing force direction changing member to the operating point of the receiving member is shorter than the distance from the mounting axis of the pressing force direction changing member to the force point of the reverse stop rod, so the reverse stop rod is pressed. The operation force to be performed is further reduced, and the operability is further improved.

  According to the second aspect of the present invention, since the receiving member provided on the base frame portion of the traveling lever has an arc-shaped cross section made of a pin or the like, the pressing force direction changing member at the time of emergency stop and the receiving member The sliding resistance is reduced, the operating force for pressing the reverse stop rod is smaller, and the operability is further improved.

It is a side view which shows an example of the hand guide roller to which the reverse stop apparatus of this invention is applied. (A) The block diagram explaining the relationship between the travel lever of the reverse stop apparatus of this invention and the tilt angle control lever of a hydraulic pump, (B) is a top view which shows the tilt angle control lever of a hydraulic pump. It is a principal part enlarged side view of FIG. FIG. 4 is a plan view of FIG. 3. It is AA sectional drawing of FIG. FIG. 6 is a cross-sectional view taken along the line B-B of FIG. 5, showing a state where the traveling lever is returned to the neutral position by the reverse stop rod. FIG. 7 is a view corresponding to FIG. 6 illustrating an operation state of the travel lever toward the reverse side in the present embodiment. It is the elements on larger scale of FIG. It is CC sectional drawing of FIG. It is a side view which shows the structure of the conventional travel lever.

  FIG. 1 is a side view showing an example of a hand guide roller to which the reverse stop device of the present invention is applied. In FIG. 1, reference numeral 1 denotes a main frame, and the main frame 1 has a configuration in which left and right side plate portions 1a are connected by a connecting frame (not shown). A rolling roller 2 is attached to the front and rear of the main frame 1 between the left and right side plate portions 1 a with the shafts supported by the left and right bearing portions 3. A hydraulic motor (not shown) for rotating the rolling roller 2 is attached to the bearing portion 3 on one side. The main frame 1 is provided with a vibration generator 4 having an eccentric weight rotatably attached thereto.

  Reference numeral 5 denotes a base frame installed on the main frame 1 via a vibration isolating material (not shown) such as a vibration isolating rubber or a spring. The main frame 1 and the base frame 5 constitute an airframe. An engine 6 and a hydraulic pump 19 (see FIG. 2) driven by the engine 6 are mounted at the center in the front-rear direction on the base frame 5. Further, an electromagnetic clutch (not shown) for transmitting the rotational force of the engine 6 to the shaft of the vibration generator 4 to vibrate the roller 2 is installed. A water tank 7 for watering is mounted on the rear part of the base frame 5, and hydraulic oil used between the hydraulic pump on the base plate 5 and the hydraulic motor provided in the rolling roller 2 is stored in the front part. A hydraulic oil tank 8 is mounted.

  Reference numeral 10 denotes a handle for an operator to operate the hand guide roller. The handle 10 is attached to a bracket 11 provided at the rear end of the base frame 5 so that the posture can be changed between an inclined posture during work and a vertical posture during transportation as shown in the figure. A lever mounting frame 12 is attached to the tip of the handle 10, and an accelerator lever 13 for starting and stopping the engine 6 and a travel for moving the hand guide roller forward, stop, and reverse are attached to the lever mounting frame 12. A lever 14 and a reverse stop rod 15 that is operated when an emergency stop is performed during reverse travel are attached. A knob 15 a is attached to the rear end of the reverse stop rod 15. This reverse stop rod 15 is slidably accommodated in a cylindrical holding member 16 attached to the lever attachment frame 12. Reference numeral 17 denotes a handle welded to the holding member 16 and the lever mounting frame 12, which is gripped by an operator. In addition, a push button for generating an alarm sound and a switch (not shown) for operating an electromagnetic clutch for operating a vibration generator are attached to the lever mounting frame 12.

  FIG. 2A is a side view schematically illustrating a control mechanism of the hydraulic pump 19 for driving the pressure roller by the traveling lever 14, and FIG. 2B is a plan view. The hydraulic pump 19 is mounted on the base frame 5 and is driven by the engine 6, and the hydraulic pump 19 has a tilt angle control lever 20. As shown in FIG. 2A, the tilt angle control lever 20 is connected to the travel lever 14 by a transmission member 21 such as a wire housed and guided in the pipe-shaped handle 10. When the traveling lever 14 is in the neutral position (standing posture) a, the tilt angle control lever 20 is also in the intermediate position d shown in FIG. 2B, and hydraulic oil is not discharged from the hydraulic pump 19.

  2B, when the traveling lever 14 is operated to the position where the traveling lever 14 is tilted forward (forward tilt posture), the tilt angle control lever 20 is pulled by the transmission member 21, and FIG. The hydraulic pump 19 discharges hydraulic oil in the direction in which the hand guide roller is advanced with respect to the hydraulic motor driven by the pressure roller 2.

  As shown in FIG. 2A, when the travel lever 14 is operated to the position where the travel lever 14 is tilted backward (backward tilt posture), the transmission member 21 is pushed out and the tilt angle control lever 20 is moved to the reverse position f. The hydraulic pump 19 discharges the hydraulic oil in the direction in which the hand guide roller is moved backward with respect to the hydraulic motor driven by the rolling roller 2.

  The reason why the standing posture of the traveling lever 14 is the stop position of the hand guide roller, the forward leaning posture is the forward moving position, and the backward leaning posture is the reverse driving position is such that this posture is well suited to the operator's operational feeling. This is because it is easy to operate.

  Next, details of the mounting structure of the travel lever 14 and the reverse stop rod 15 will be described with reference to FIGS. 3 is an enlarged view of a main part of FIG. 1, and FIG. 4 is a plan view thereof. 5 is a cross-sectional view taken along the line AA in FIG. 3, FIG. 6 is a cross-sectional view taken along the line BB in FIG. 5, FIG. 7 is a view corresponding to FIG. 7 is a partially enlarged view of FIG. 7, and FIG. 9 is a sectional view taken along the line CC of FIG.

  As shown in FIGS. 3 and 5, the lever mounting frame 12 includes a lower frame 23 and an upper frame 24. As shown in FIG. 6, the lower frame 23 is attached by welding a bent plate 10 a whose front end is welded to the end of the handle 10. As shown in FIGS. 5 and 6, the upper frame 24 is welded to the top plate portion 24a, the vertical plate portion 24b for attaching the lever welded to the lower surface of the top plate portion 24a, and the lower end of the vertical plate portion 24b. It has a mounting portion 24c made of a horizontal plate, side plate portions 24d formed on both sides of the top plate portion 24a, a front plate portion 24e formed on the front and rear sides of the top plate portion 24a, and a rear plate portion 24f. The upper frame 24 has the side plate portion 24d aligned with the side plate portion 23a of the lower frame 23 and is coupled by bolts 26 (see FIGS. 3 and 9), and the mounting portion 24c of the vertical plate portion 24b is connected to the lower frame 23 with bolts 27. (See FIG. 5).

  As shown in FIGS. 5 and 6 to 9, the travel lever 14 has a plate-like base frame portion 14 a. This base frame portion 14a has a shape in which the front and rear width of the upper portion is enlarged, and has a protruding portion 14c welded to the traveling lever main body portion 14b at the upper portion of the enlarged portion. In addition, a boss 29 is provided at substantially the center of the base frame portion 14a. On the other hand, a pivot shaft 30 that pivots the travel lever 14 is welded to one surface of the vertical plate portion 24b of the upper frame 24 perpendicularly to the surface. And the boss | hub 29 provided in the base frame part 14a is fitted to the pivot shaft 30 so that rotation is possible. 31 is a large diameter part formed in the intermediate part of the pivot shaft 30 in order to form a space | interval between the boss | hub 29 of the base frame part 14a, and the vertical board part 24b. A threaded portion 32 is provided integrally with the pivot shaft 30 so as to protrude from the pivot shaft 30 concentrically with the pivot shaft 30. Reference numeral 33 denotes a disc spring fitted to the screw portion 32 together with washers 34, 34 in order to give a rotational resistance of the traveling lever 14, and 35 gives a frictional force due to the elastic force of the disc spring 33 to the base frame portion 14a for adjustment. It is a double nut to do.

  As shown in FIGS. 6-8, the lower part of the base frame part 14a is provided with the wire connection part 14d of a notch shape from the bottom upward. Then, a bolt 36 is inserted into a connecting ring 21a and a wire connecting portion 14d provided at the end of the transmission member 21 such as a wire, and a nut 37 is screwed into the bolt 36 and tightened to tighten the end of the transmission member 21. Is connected to the lower portion of the base frame portion 14a. In FIG. 6, reference numeral 40 denotes a guide cylinder in which the transmission member 21 is slidably attached. The guide cylinder 40 is attached to a bracket 41 welded to the vertical plate portion 24 b with bolts 42.

  As shown in FIG. 4, the top plate portion 24a of the upper frame 24 is provided with long opening portions 39, 39A in the front and rear, and the traveling lever 14 and the accelerator lever 13 penetrate the opening portions 39, 39A so as to be movable back and forth. It is inserted.

  As shown in FIG. 5, the accelerator lever 13 is also attached to the opposite side of the mounting surface of the traveling lever 14 of the vertical plate portion 24 b of the upper frame 24 by the attachment mechanism similar to the traveling lever 14. The members 30A, 31A, 32A, 33A, 34A, and 35A for attaching the accelerator lever 13 correspond to the members 30, 31, 32, 33, 34, and 35 for attaching the traveling lever 14, and have the same functions. It is a member having. 43 is a transmission member such as a wire connected to the lower portion of the base frame portion 13a of the accelerator lever 13, and this transmission member 43 passes through the inside of the handle 10, and a control portion (Fig. (Not shown).

  Next, an emergency stop mechanism using the reverse stop rod 15 will be described. 7 and 8 show a state in which the traveling lever 14 is in a backward tilted posture when the hand guide roller is moved backward. 5 to 9, reference numeral 45 denotes a pressing force direction changing member that converts the pressing force by the reverse stop rod 15 from the backward tilting posture of the traveling lever 14 to the turning force in the standing direction. Reference numeral 46 denotes an attachment shaft for attaching the pressing force direction changing member 45 so as to be rotatable in the front-rear direction. The mounting shaft 46 is provided at a position behind and above the pivot shaft 30 of the traveling lever 14 in the vertical plate portion 24b. The pressing force direction changing member 45 is made of a plate material whose front and rear width is increased toward the lower portion, and a notch 45 a for connecting to the reverse stop rod 15 is provided at the lower portion and the rear portion.

The holding member 16 of the reverse stop rod 15 is attached by welding its front end to the rear plate portion 24 f of the upper frame 24 and welding the rear end to one end of the handle 17. The other end of the handle 17 is welded to the top plate portion 24 a of the upper frame 24. A connecting tool 47 is attached to the front end of the reverse stop rod 15, and as shown in FIGS. 8 and 9, a bolt 48 is attached to the annular portion 47 a at the tip of the connecting tool and the notch 45 a provided in the pressing force direction changing member 45. Then, a nut 49 is screwed into the bolt 48 to connect the reverse stop rod 15 to the pressing force direction changing member 45 .

  On the other hand, on the base frame portion 14a of the traveling lever 14, a receiving member 50 that is in contact with the front side 45b of the pressing force direction changing member 45 in parallel with the pivot shaft 30 of the traveling lever 14 is vertically extended from the base frame portion 14a. It is provided so as to protrude toward the plate portion 24b. It is preferable that the receiving member 50 is formed such that at least the contact surface with the pressing force direction changing member 45 has an arcuate cross section. In this embodiment, an example is shown in which a round rod-shaped rod having a circular cross-sectional shape as the receiving member 50 is used. A torsion spring 52 is wound around and attached to the attachment shaft 46 in order to prevent rattling of the pressing force direction changing member 45 and the reverse stop rod 15. The torsion spring 52 has one end fixed to the vertical plate portion 24b, the other end fixed to the pressing force direction changing member 45, and a force indicated by an arrow R1 that rotates the pressing force direction changing member 45 forward (FIG. 8). The reverse stop rod 15 is always fixed at the reverse position.

  As shown in FIG. 8, when the traveling lever 14 is in the backward tilted position and the hand guide roller is moving backward, there is an obstacle behind the operator, and the operator presses the knob 15a of the reverse stop rod 15 or the obstacle When the operator's body is sandwiched between the object and the knob 15a and the reverse stop rod 15 is pushed in the direction of the arrow Fa, that is, forward, the pressing force direction changing member 45 is indicated by the arrow R2 around the mounting shaft 46. Rotate. Here, since the front side 45b of the pressing force direction changing member 45 is inclined so that the lower side is the front, the front side 45b is the arrow Fb at the contact portion P of the front side 45b with the receiving member 50. As shown, the receiving member 50 is pushed upward obliquely. That is, the front side 45b pushes up the receiving member 50 in a direction close to the rotation direction indicated by the arrow Fc that causes the traveling lever 14 to stand up from the backward tilted position by contacting the traveling lever 14 with the receiving member 50.

  As described above, in this embodiment, the pressing force direction changing member 45 that converts the operation force forward of the reverse stop rod 15 into the rotational force in the direction close to the direction in which the traveling lever 14 is raised is provided. There is little loss of force, the force required to operate the reverse stop rod 15 can be reduced, and the operability can be improved.

  In this embodiment, since the cross-sectional shape of the receiving member 50 is an arc, the reverse stop rod 15 is brought into direct contact with the rear side of the base frame portion 65a as in the conventional device shown in FIG. Compared to the above, the sliding resistance at the contact portion P when pressed by the reverse stop rod 15 can be reduced, the force required to operate the reverse stop rod 15 can be further reduced, and the operability is further improved. be able to.

  Further, in this embodiment, as shown in FIG. 8, the distance L1 from the axis of the mounting shaft 46 to the contact portion (action point) P with the receiving member 50 is set as the mounting direction of the pressing force direction changing member 45. Since the distance from the shaft center of the shaft 46 to the connecting member (power point) 47 of the reverse stop rod 15 is shorter than L2 (L1 <L2), the reverse stop rod corresponding to the force Fb required to rotate the travel lever 45 is obtained. The force Fa required to press 15 can be reduced to Fa = Fb × (L1 / L2), and the operability is further improved.

  When implementing this invention, it can implement in the form variously changed in addition to said embodiment. For example, if a receiving member 50 having a shaft fitted with a roller is used, the sliding resistance between the pressing force direction changing member and the receiving member is reduced, and the force required to operate the reverse stop rod 15 is further reduced. Further, the operability is improved.

1: main frame, 1a: side plate part, 2: rolling roller, 3: bearing part, 4: vibration generator, 5: base plate, 6: engine, 7: water tank, 8: hydraulic oil tank, 10: handle, 11: bracket, 12: lever mounting frame, 13: accelerator lever, 14: travel lever, 15: reverse stop rod, 16: holding member, 17: handle, 19: hydraulic pump, 20: tilt angle control lever, 23: Lower frame, 24: Upper frame, 24b: Vertical plate part, 30: Pivoting shaft, 31: Large diameter part, 32: Screw part, 33: Disc spring, 34: Washer, 35: Double nut, 36: Bolt, 37 : Nut, 39, 39A: opening, 45: pressing force direction changing member, 46: mounting shaft, 47: connector, 48: bolt, 49: nut, 50: receiving member, 52: torsion spring

Claims (2)

A handle is attached to the rear part of the hand guide roller, and a travel lever is attached to a lever mounting frame provided at the tip of the handle so that the travel lever can be tilted in the front-rear direction. In the reverse stop device of the hand guide roller, the reverse stop rod is made to protrude backwardly on the lever mounting frame so as to be movable back and forth.
A pressing force direction changing member that converts a pressing force forward of the reverse stop rod during a reverse emergency stop into a turning force in the standing direction of the traveling lever in a backward tilting posture can be rotated on the lever mounting frame. to install and co-in,
The distance from the axial center of the mounting shaft of the pressing force direction changing member to the operating point to the receiving member provided on the travel lever is the distance from the axial center of the mounting shaft of the pressing force direction changing member to the reverse stop rod. A reverse stop device for a hand guide roller characterized by being shorter than the distance to the power point . In the reverse stopping device of the hand guide roller according to claim 1,
A vertical plate portion is provided on the lever mounting frame, and a base frame portion of a travel lever is pivotally attached to a pivot shaft provided on the vertical plate portion,
The base frame portion is provided with a receiving member in which a cross-sectional shape of at least a portion with which the pressing force direction changing member abuts forms an arc shape,
The pressing force direction changing member is made of a plate material whose front and rear width is increased toward the lower portion, and the upper portion of the pressing force direction changing member is provided behind and above the mounting position of the pivot shaft of the vertical plate portion. Pivot on the mounting shaft,
In the lower part and rear part of the pressing force direction changing member, a force point with the reverse stop rod is provided,
The backward stopping device for a hand guide roller, wherein the inclined front side of the pressing force direction changing member is used as a contact side with respect to the receiving member.

Images