JP2017115443A - Walking-type blade working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a blade part easily switchable to a discharge angle even if a lock pin is entangled, in a walking-type blade working machine having the lock pin which is switched to a lock state in which the lock pin is inserted into a pin hole, and a blade part is maintained at a working angle, and a lock release state in which the lock pin is withdrawn from the pin hole, and the oscillation of the blade part to a discharge angle is permitted.SOLUTION: A release operation implement 37 which is connected to a lock pin 32 via an interlocking mechanism 36 while being interlocked with the lock pin is manually operably supported to an operation handle 9. The interlocking mechanism 36 comprises a charge spring 39. When the lock pin 32 is not withdrawn from the pin hole even if the release operation implement 37 is operated, the charge spring 39 is operated so as to be elastically deformable through an operation of the release operation implement 37, and possesses a withdrawal operation force of the lock pin 32.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a walking blade working machine, and more particularly, to a walking blade working machine that performs work for removing snow, earth, straw scraps, and the like.

Examples of the walking blade working machine described above include the following.
A support frame that swings up and down around an axis extending in the lateral direction of the traveling machine body with respect to the traveling machine body, a blade part that is supported by the front part of the support frame, and a rocking unit that swings backward from the support frame toward the traveling machine body. An operation handle that is movably extended is provided, and the blade portion is swung up and down to a lowering work posture and a rising discharge posture by a vertical swing operation of the support frame by the operation handle.

  A connecting portion that changes a connecting angle of the blade portion with respect to the support frame over a working angle and a discharge angle; and a lock pin that is slidably supported on one of the support frame and the blade portion. By keeping the blade inserted into the other pin hole of the blade part in the locked state, the blade part is maintained at the working angle, and by releasing the lock pin from the pin hole, the blade part is adjusted to the discharge angle. Allow swinging. There is a release operation tool that is supported by an operation handle so as to be able to be manually operated in a state of being interlocked and connected to a lock pin via an interlock mechanism, and the lock pin is operated to an unlocked state by the release operation tool.

This type of walking blade working machine works as follows.
That is, when a work object such as snow is pushed by the blade part in the lowered work posture, and the work object enters the blade part, the support frame is swung by the operation handle to raise the blade part, and the blade part rises When the discharge posture is reached, the release operation tool is operated to switch the lock pin to the unlocked state, thereby swinging the blade portion to the discharge angle and discharging the work object contained in the blade portion.

  As this type of walking blade working machine, for example, there is a walking snow removing machine disclosed in Patent Document 1. In this walking type snowplow, a support beam is provided so as to be swingable up and down by an operation handle, and a dozer part (blade part) is supported on the support beam so as to be rotatable via a dozer rotating device. A pin (lock pin) is supported on the front portion of the support beam via a base bracket and a case portion. When the pin fits into the snow pushing hole of the rotating plate provided in the dozer, the dozer is restrained at the snow pushing snow removal position, and when the pin is removed from the snow pushing hole, the dozer turns around the dozer fulcrum. It becomes movable. The pin is connected to the lever via a cable and is pulled out by the lever.

JP 2011-231454 A

  In the case of the conventional technology for maintaining the blade portion at the working angle, even if the release operation tool is operated to switch the lock pin to the unlocked state, the load on the blade portion is applied, so the lock pin is squeezed in the pin hole. It may be difficult to escape. By shaking the operation handle and applying vibration to the blade, etc., you can eliminate the lock pin kink, but even if you can eliminate the lock pin kink in this way, you can remove the lock pin in parallel with the vibration application operation. Otherwise, the lock pin will not come out and it will be difficult to switch the blade portion to the discharge angle.

  The present invention provides a walking blade working machine that can easily switch the blade portion to the discharge angle even if the lock pin is twisted.

The walking blade working machine according to the present invention is:
Traveling aircraft,
A support frame that is supported by the traveling machine body via a connecting shaft and that swings up and down with respect to the traveling machine body with an axis extending in a lateral direction of the traveling machine body of the connecting shaft as a swing center;
A blade portion supported by the front portion of the support frame and working in front of the traveling aircraft body;
An operation handle that extends from the support frame so as to be swingable integrally with the traveling machine body, and swings the support frame to swing the blade part up and down between a lowering work posture and a rising discharge posture. When,
Connecting the blade portion to the support frame in a swingable manner, and changing the connection angle of the blade portion to the support frame over a working angle and a discharge angle;
It is slidably supported by one of the support frame and the blade part, and is inserted into the other pin hole of the support frame and the blade part, thereby switching to a locked state that maintains the blade part at the working angle. A lock pin that switches to an unlocked state that allows the blade portion to swing to the discharge angle by being extracted from the pin hole;
A release operation tool that is supported and operated by the operation handle in an interlocked manner with the lock pin via an interlocking mechanism, and that is operated to switch the lock pin to the unlocked state. Prepared,
The interlock mechanism includes a charge spring,
The charge spring is elastically deformed by the operation of the release operation tool to switch the lock pin to the lock release state when the lock pin does not switch to the unlocked state even when the release operation tool is operated. With operating force to operate.

  According to this configuration, even when the release operation tool is operated to the unlock position, if the lock pin is squeezed and cannot be removed, vibration is applied to the support frame, the blade portion, etc. while the release operation tool is held at the lock release position. If the operation is performed, the charge spring is elastically deformed and stores the lock pin removal operation force. Therefore, when the lock pin is removed, the lock pin is pulled out by the charge spring.

  Therefore, if the operation to apply vibration to the machine is performed, the lock pin can be easily switched to the unlocked state without switching the lock pin, and the blade can be switched to the discharge angle to discharge the work object. Can do.

  In the present invention, it comprises a pin case that is erected upward from the support frame and is slidably accommodated in the vertical direction of the traveling machine body, the pin hole is provided in the blade part, It is preferable that the blade portion is positioned below the pin case at the working angle.

  According to this configuration, since the upper part of the pin hole is covered with the pin case, a work structure such as snow enters the pin hole from above with a simple structure utilizing the pin case as a cover means, and the lock pin is difficult to come off. This is easy to avoid.

  In the present invention, it is preferable that the release operation tool is a swing lever for grip operation.

  According to this configuration, when the aircraft is swung by the operation handle, the release operation tool and the operation handle at the release operation position can be collectively supported, so that the operation of applying vibration to the aircraft while keeping the release operation tool at the release operation position. It is easy to do.

It is a side view showing the whole walk type blade snowplow. It is a top view which shows the whole walk-type blade snow remover. It is a side view which shows the blade part of a raise discharge attitude | position. It is a side view which shows the blade part of a discharge angle. It is a side view which shows the blade part of a scooping up state. It is a perspective view which shows a connection angle change mechanism. It is a vertical side view which shows the arrangement | positioning part of a lock pin.

  Hereinafter, an embodiment of a walking blade working machine according to the present invention will be described based on the drawings. A case where the present invention is applied to a walking blade snowplow as an example of a walking blade working machine will be described.

  FIG. 1 is a side view showing the entire walking blade snow remover. FIG. 2 is a plan view showing the entire walking blade snowplow. 1 and 2, the direction [F] is the front side of the traveling aircraft body, the direction [B] is the rear side of the traveling aircraft body, the direction [L] is the left side of the traveling aircraft body, and the direction [R] is the right side of the traveling aircraft body. It is defined as

  The walking blade snowplow includes a traveling machine body 3 equipped with a crawler traveling device 2 on both sides of the body frame 1. The traveling machine body 3 is provided with an electric motor 4 and a battery 5 for supplying electric power to the electric motor 4. The electric motor 4 and the battery 5 are covered with a cover 6. The output part of the electric motor 4 and the drive wheels 2 a of the left and right crawler travel devices 2 are interlocked and connected via a mission 7. The electric motor 4 is switched between the forward drive state and the reverse drive state with the travel lever 8 swinging in the front-rear direction of the travel body 3, and in the forward drive state and the reverse drive state. Shift operation is performed. The traveling machine body 3 is self-propelled when the left and right crawler traveling devices 2 are driven by the electric motor 4.

  A blade portion 10 is disposed in front of the traveling machine body 3. The blade unit 10 is supported by the traveling machine body 3 via the support frame 20. A pair of left and right operation handles 9 are extended from the support frame 20 toward the rear of the traveling machine body 3.

  As shown in FIGS. 1 and 2, an intermediate portion of the support frame 20 in the longitudinal direction of the traveling machine body is connected to the machine body frame 1 via a pair of left and right connection shafts 21. The support frame 20 is supported by the traveling machine body 3 so as to be swingable up and down around an axis X extending in the horizontal direction of the traveling machine body of the connecting shaft 21. Specifically, as shown in FIGS. 1 and 2, the support frame 20 includes a main frame 22 that extends in the front-rear direction of a pair of left and right traveling aircraft bodies, and a front connection frame 23 that extends in the lateral width direction of the traveling aircraft bodies. The front connection frame 23 connects the front end portions of the left and right main frames 22. A connecting portion 24 is provided at an intermediate portion of the left and right main frames 22 in the longitudinal direction of the traveling machine body. The left and right connecting portions 24 are connected to the side portion 1 a of the body frame 1 via the connecting shaft 21 so as to be relatively rotatable. In the present embodiment, a pair of left and right connecting shafts 21 are provided, but instead of the pair of connecting shafts 21, one connecting shaft extending over the left and right main frames 22 may be employed.

  As shown in FIGS. 1 and 2, the blade portion 10 includes a dozer blade portion 11, a scraper portion 12 that extends downward and forward from the lower portion of the dozer blade portion 11, and left and right sides of the dozer blade portion 11 and the scraper portion 12. And a side plate 13 connected to the end. The blade unit 10 includes an accommodation space 14 formed above the scraper unit 12. The blade part 10 scoops snow into the accommodation space 14 by the scraper part 12.

  The blade part 10 is supported by the front part of the support frame 20. Specifically, a connecting stay portion 15 shown in FIG. 6 is provided on the back side of the dozer blade portion 11. The connecting stay portion 15 and the front end portion of the support frame 20 are connected via a connecting angle changing mechanism 30.

  As shown in FIGS. 1 and 2, the left and right operation handles 9 are extended from the support frame 20 so as to be integrally swingable in the rearward direction of the traveling machine body 3. A bent end portion 9 a is provided at the base end portion of the left and right operation handles 9 so as to face the lateral inner side of the traveling machine body 3. The left and right operation handles 9 are connected to each other by connecting the bent end portions 9a.

  By swinging the left and right operation handles 9 up and down around the axis X of the connecting shaft 21, the support frame 20 can be swung up and down, and the blade portion 10 is lowered and lowered and lifted. It can be swung up and down over the posture U.

  As shown in FIG. 1, the front end side of the support frame 20 is lowered and the blade portion 10 is in the lowered working posture D by raising the operation handle 9 to the snow removal position A. As shown in FIG. 3, when the operation handle 9 is lowered and operated to the discharge position B, the front end side of the support frame 20 is raised and the blade portion 10 is in the raised discharge posture U.

  As shown in FIG. 2, the connecting angle changing mechanism 30 includes a pair of left and right pivot shaft connecting portions 31 and a single lock pin 32.

  Specifically, as shown in FIG. 6, the connecting stay portion 15 of the blade portion 10 includes a pair of left and right vertical stay portions 15a and a horizontal stay portion 15b. The horizontal stay part 15b is connected over the upper end side of the left and right vertical stay parts 15a. A pair of left and right vertical plate-type support portions 25 are provided at the front portion of the support frame 20. As shown in FIGS. 2 and 6, the support portion 25 is interposed between the lateral end portion of the front connection frame 23 and the front end portion of the main frame 22. The support portion 25 is connected to the front connection frame 23 and the main frame 22.

  The lower portions of the left and right vertical stay portions 15a are rotatably connected to the left and right support portions 25 via a pair of left and right connecting portions 31. In the present embodiment, the pair of left and right connecting portions 31 are provided, but instead of the pair of left and right connecting portions 31, one connecting portion 31 extending across the left and right vertical stay portions 15a may be employed. The connecting portion 31 allows the blade portion 10 to swing up and down with respect to the support frame 20 with an axis Y extending in the lateral width direction of the traveling body of the connecting portion 31 as a swing center. Therefore, the connection part 31 changes the connection angle with respect to the support frame 20 of the blade part 10 over the working angle E shown in FIG. 1, and the discharge | emission angle F shown in FIG.

  In the present embodiment, the pivot-type connecting portion 31 is adopted, but not limited to the pivot-type connecting portion, a swing support type connecting portion may be adopted. That is, the blade unit 10 and the support frame 20 may be connected by a link mechanism using a swing link, and the connection angle of the blade unit 10 with respect to the support frame 20 may be changed by swinging the swing link.

  As shown in FIG. 1, when the working angle E is reached, the blade portion 10 is supported by the support frame 20 in a posture in which the accommodation space 14 opens forward and snow is scooped up by the scraper portion 12 and enters the accommodation space 14. In the state of the working angle E of the blade part 10, the lateral stay part 15 b enters below the front connection frame 23.

  As shown in FIG. 4, when the blade portion 10 reaches the discharge angle G, the accommodation space 14 opens downward, and is supported by the support frame 20 in a posture in which snow falls from the accommodation space 14.

  As shown in FIGS. 6 and 7, a pin case 33 is erected upward from the traveling machine body 3 from the front connection frame 23. The lock pin 32 is accommodated in the pin case 33 so as to be slidable in the vertical direction of the traveling machine body 3. The pin case 33 houses a lock spring 34 that biases the lock pin 32 downward. A pin hole 35 is provided on the upper surface side of the lateral stay portion 15b. The pin hole 35 is provided by attaching a member having the pin hole 35 to the upper surface of the lateral stay portion 15b.

  In a state where the blade portion 10 is at the working angle E, the pin hole 35 is positioned below the pin case 33, and the lower end side of the lock pin 32 is inserted into the pin hole 35 by the operation by the lock spring 34. The lock pin 32 is locked when the lower end side is inserted into the pin hole 35, and is unlocked when the lower end side is extracted from the pin hole 35. When the pin hole 35 is positioned below the pin case 33, the pin hole 35 is covered with the pin case 33, and snow can be prevented from entering the pin hole 35 from above.

  When the blade portion 10 is raised from the lowering work posture D to the rising discharge posture U, the blade portion 10 can be maintained at the working angle E by the lock pin 32 by keeping the lock pin 32 in the locked state, and snow is stored in the storage space 14. You can avoid spilling. When the blade unit 10 is raised to the ascending discharge posture U, the lock pin 32 is switched to the unlocked state so that the blade unit 10 is lifted from the ground and is not supported from below by the ground. Since the center of gravity of 10 is located in front of the axis Y of the connecting part 31, the blade part 10 swings the axis Y of the connecting part 31 by the weight of snow located in the blade part 10 and the accommodation space 14. It swings downward about the center and switches to the discharge angle G.

  As shown in FIGS. 1 and 7, a release operation tool 37 is interlocked and connected to the lock pin 32 via an interlocking mechanism 36. The release operation tool 37 is constituted by a lever for grip operation, and is supported by the right operation handle 9 so that the grip operation can be performed. In this embodiment, the release operation tool 37 is supported by the right operation handle 9, but may be supported by the left operation handle 9. The interlock mechanism 36 is provided with an operation cable 38 and a charge spring 39. The operating force that the charge spring 39 exerts to operate the lock pin 32 in the unlocked state is set to be stronger than the operating force that the lock spring 34 exerts to operate the lock pin 32 in the locked state. That is, the charge spring 39 has a larger spring constant than the lock spring 34. One end side of the inner cable 38 a of the operation cable 38 is connected to the lock pin 32. The charge spring 39 is interposed between the other end side of the inner cable 38 a and the release operation tool 37. In this embodiment, the charge spring 39 is interposed between the operation cable 38 and the release operation tool 37, but may be interposed between the lock pin 32 and the operation cable 38. In the present embodiment, the interlocking mechanism 36 is configured by the operation cable 38, but may be configured using a link and an interlocking rod. In this case, the charge spring 39 is not limited to the position where the charge spring 39 is connected to the lock pin 32 or the release operation tool 37, but may be interposed at any position such as between the link and the interlocking rod.

  When the release operating tool 37 is gripped to the release position Z (see FIG. 4) with the hand supporting the grip 9b of the right operation handle 9, the inner cable 38a is pulled and the lock pin 32 is opposed to the lock spring 34. By pulling up, the lock pin 32 can be switched to the unlocked state. If the lock pin 32 is twisted and does not come out of the pin hole 35 even if the release operation tool 37 is operated to the release position Z, the charge spring 39 is elastically deformed by the operation of the release operation tool 37 and the lock pin 32 is removed. Accumulate operating power.

  When the gripping operation of the release operation tool 37 is released and the release operation tool 37 returns to the non-operation position, the inner cable 38a is loosened and the lock pin 32 returns to the locked state by the operation of the lock spring 34.

The snow removal work by the walking blade snow remover is performed as follows.
As shown in FIG. 1, the operation handle 9 is moved up to the snow removal position A to bring the blade portion 10 into the descending working posture D, the traveling machine body 3 is driven to push snow by the blade portion 10, and the scraper portion 12 Scoop up. At this time, as shown in FIG. 5, when the operation handle 9 is slightly lowered from the snow removal position A and operated to the scoop position S, the blade portion 10 is slightly upward as compared with the descending work posture D, and it becomes easy to scoop up snow. .

  When the snow enters the accommodation space 14, the operation handle 9 is lowered toward the discharge position B as shown in FIG. At this time, the lock pin 32 is kept in the locked state, the blade portion 10 is maintained at the working angle E, and the snow in the accommodation space 14 is not spilled.

  When the blade unit 10 is raised to the lifted discharge posture U, as shown in FIG. 4, the release operation tool 37 is operated to the release position Z, and the lock pin 32 is switched to the unlocked state. If the lock pin 32 does not come out of the pin hole 35 even when the release operation tool 37 is operated to the release position Z, the operation handle 9 is swung while the release operation tool 37 is maintained at the release position Z to support the support frame 20 and the blade. Vibration is applied to the unit 10 and the like. When the lock pin 32 is not twisted, the charge spring 39 is elastically deformed and the pulling operation force of the lock pin 32 is stored, so that the lock pin 32 is switched to the unlocked state by the operation of the charge spring 39. When the lock pin 32 is switched to the unlocked state, the blade portion 10 is raised to the lifted discharge posture U and is not supported from below by the ground, so the blade portion 10 swings the axis Y of the connecting portion 31. The snow falls in the center by falling down and swinging due to its own weight, and switching to the discharge angle G.

  When the snow discharge is completed, when the operation handle 9 is moved upward toward the snow removal position A, the blade part 10 is lowered at the discharge angle G, and the lower part of the blade part 10 comes into contact with the ground, and the ground reaction force As a result, the blade portion 10 swings up and swings about the axis Y of the connecting portion 31 as the swing center. When the blade portion 10 approaches the working angle E, the lateral stay portion 15b enters below the front connection frame 23 while pushing up the lock pin 32 against the lock spring 34 by the tongue piece 40 (see FIG. 7). When the operation handle 9 is in the snow removal position A, the blade portion 10 is at the working angle E, the pin hole 35 is positioned below the pin case 33, and the lock pin 32 is locked by the operation by the lock spring 34. 10 is fixed to the working angle E.

[Another embodiment]
(1) In the above-described embodiment, the lock pin 32 is provided so as to be slidable up and down. However, the lock pin 32 may be slidable in the lateral width direction of the traveling machine body 3 without being limited to the vertical slide. That is, the lock pin 32 may be supported by the support portion 25 or the vertical stay portion 15a so as to be slidable in the lateral direction.

(2) In the above-described embodiment, an example in which only one lock pin 32 is provided is shown, but the number is not limited to one, and two or more lock pins 32 may be provided.

(3) In the above-described embodiment, an example in which the lock pin 32 is provided in the front connection frame 23 of the support frame 20 and the pin hole 35 is provided in the lateral stay portion 15b of the blade portion 10 is shown. The pin portion 35 may be provided in the front connection frame 23 provided in the stay portion 15b.

(4) In the above-described embodiment, an example in which the release operation tool 37 is configured by a lever for grip operation is shown. However, an operation such as a lever supported by the operation handle 9 in a state of extending upward from the operation handle 9 can be performed. You may comprise by the lever operated with the hand remove | separated from the grip part 9b of the handle | steering-wheel 9. FIG.

(5) In the above-described embodiment, the example in which the crawler traveling device 2 is driven by the electric motor 4 has been described, but the crawler traveling device 2 may be driven by the engine.

  The present invention is not limited to a walking blade snow remover, and can be applied to a walking blade working machine including a blade unit that uses various objects such as soil and straw scraps as work objects instead of the blade unit 10 for snow removal. .

DESCRIPTION OF SYMBOLS 3 Traveling machine body 9 Operation handle 10 Blade part 20 Support frame 21 Connection shaft 31 Connection part 32 Lock pin 33 Pin case 35 Pin hole 36 Interlocking mechanism 37 Release operation tool (Operation lever 39 Charge spring D Lowering work posture E Work angle G Discharge angle U ascending discharge posture X axis

Claims (3)

Traveling aircraft,
A support frame that is supported by the traveling machine body via a connecting shaft and that swings up and down with respect to the traveling machine body with an axis extending in a lateral direction of the traveling machine body of the connecting shaft as a swing center;
A blade portion supported by the front portion of the support frame and working in front of the traveling aircraft body;
An operation handle that extends from the support frame so as to be able to swing integrally in the rearward direction of the traveling machine body, and swings the support frame so that the blade portion swings up and down between a lowering work posture and a rising discharge posture. When,
Connecting the blade portion to the support frame in a swingable manner, and changing the connection angle of the blade portion to the support frame over a working angle and a discharge angle;
It is slidably supported by one of the support frame and the blade part, and is inserted into the other pin hole of the support frame and the blade part, thereby switching to a locked state that maintains the blade part at the working angle. A lock pin that switches to an unlocked state that allows the blade portion to swing to the discharge angle by being extracted from the pin hole;
A release operation tool that is supported and operated by the operation handle in an interlocked manner with the lock pin via an interlocking mechanism, and that is operated to switch the lock pin to the unlocked state. Prepared,
The interlock mechanism includes a charge spring,
The charge spring is elastically deformed by the operation of the release operation tool to switch the lock pin to the lock release state when the lock pin does not switch to the unlocked state even when the release operation tool is operated. A walking blade working machine with operating force to operate. A pin case that is erected upward from the support frame and that slidably accommodates the lock pin in the vertical direction of the travel aircraft;
2. The walking blade working machine according to claim 1, wherein the pin hole is provided in the blade portion and is located below the pin case at the working angle of the blade portion.   The walking blade working machine according to claim 1, wherein the release operation tool is a swing lever for a grip operation.

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