JPH04117025U - Snowplow blade width expansion device - Google Patents

Abstract

(57) [Summary] [Purpose] To make it possible to expand and contract the running width of the blade,
The purpose is to increase the maneuverability of snowplows. [Configuration] First, the movable part of the blade is positioned relative to the vehicle body or the non-movable part of the blade,
A blade width detection mechanism is provided to calculate the traveling width of the blade from this positioning result. Further, a blade width setting mechanism is provided in the driver's cab of the snowplow, so that an operator can set a desired blade width to the setting mechanism. Next, a control mechanism for controlling a fluid pressure cylinder for driving the movable part of the blade is provided, and the mechanism is notified of the blade running width detection value from the blade width detection mechanism and sets the blade running width detection value and the setting mechanism. The hydraulic cylinder is expanded and contracted as appropriate by comparing the travel width with the set travel width.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a blade width expansion/contraction device for snowplows, which uses a fluid pressure cylinder. Automate the operation of expanding and contracting the running width of the blade by expanding and contracting the blade.

0002

[Conventional technology]

In recent years, automobiles have become extremely popular in Japan, and the amount of automobile traffic has increased dramatically. Ta. In addition, roads have been developed to accommodate this increase in traffic, and 10m roads are now rare. It is no longer bad.

0003 However, with the widening of roads, new problems have arisen in snowy regions. Ta. This is because when a road becomes two or three lanes on each side, only one lane is cleared of snow. With snowplows, it is necessary to drive the snowplow in several parts, and during this snow removal work, In some cases, the outside lanes receive snow from the center lane, making effective use of the full width of the road. In addition, two-lane and three-lane snowplows are used. This is because snowplows may not be able to pass through narrow roads.

0004 Therefore, in the past, the running width of snowplow blades could be expanded or contracted, and it was possible to Several attempts have been made to combine this with the ability to pass through defilements. Such blade expansion The method of shrinking is to adjust the angle of the blade and the width of the blade body. Although it is possible to adjust the width of the blade itself, the inventor of the present invention Convinced that joints are more advantageous, we decided to install a base frame that hangs below the snowplow. By attaching multiple sub-blades to the arm in a slidable manner, the sub-blades can be A snow removal blade that allows you to adjust the width of the entire blade by sliding the blade. (Utility Application No. 1-82777).

[0005] However, all of the conventional blades with adjustable travel width have no hydraulic cylinder for width adjustment. The blade can be extended or retracted using a lever in the driver's cab. Since the running width cannot be visually checked, it is difficult for snow removal workers to actually adjust the running width. There was a great deal of reliance on intuition.

[0006]

[Problem that the idea aims to solve]

This invention was developed in light of the above-mentioned problems with conventional blade running width adjustment. This was developed based on the idea that the blade travel width can be automatically adjusted without relying on the intuition of snow removal workers. The technical problem is to provide a new device that can be adjusted by

[0007]

[Means to solve the problem]

In this invention, A snowplow with a blade that can expand and contract its travel width by expanding and contracting a fluid pressure cylinder. On the other hand, Blade running is determined by comparing the position of the moving parts of the blade to the position of the non-moving parts. A blade width detection mechanism that detects the current value of the line width and outputs it as an electrical signal, and A blade width setting mechanism provided indoors and capable of inputting a blade setting width; The blade setting width input to the blade width setting mechanism and the blade width detection mechanism detecting Compare the current value of the blade running width and extend the hydraulic cylinder based on the comparison result. The method is to provide a control mechanism that expands and contracts the blade running width by retracting the blade. By adopting stages, it is possible to automatically expand and contract the blade running width.

[0008]

【Example】

Hereinafter, the present invention will be explained based on examples. In addition, the method adopted in this example is The running width of the blade can be increased by changing the blade width without changing the propulsion angle. It is an adjustable type.

[0009] Place the right side slightly forward of the left side on the left and right sides of the center of the snowplow M chassis, and then Hydraulic cylinders 12L and 12R are installed (see Figures 1 and 2). And Whis A pair of brackets 23L and 23R are attached to both rod ends of the hydraulic cylinders 12L and 12R. are concatenated. The base frame body 21 straddles below these brackets 23L and 23R. It is pivoted, and the bottom part is also pivoted to brackets 23L and 23R. Reversing fluid pressure cylinders 11L and 11R are arranged rearward. Furthermore, for this inversion Link members 22L and 22R are pivotally connected to the rod ends of the fluid pressure cylinders 11L and 11R. . These link materials 22L and 22R are also pivotally connected to the base frame body 21. Therefore, when the reversing fluid pressure cylinders 11L and 11R expand and contract, the cylinders 11L and 11R and link materials 22L and 22R, base frame body 21 and brackets 23L and 23R. The base frame main body 21 rotates back and forth by the function of the link mechanism composed of It has become so. Also, for the expansion and contraction of the above-mentioned hoist fluid pressure cylinders 12L and 12R. Therefore, the left or right side of the base frame body 21 moves up and down, or the base frame body 21 moves up and down. The entire base frame body 21 moves up and down (see FIGS. 3 and 4).

0010 The slide rail attached to the front of this base frame body 21 has two brackets. Radial materials 3L and 3R are arranged so as to be slidable in the lateral direction. At this time, the right Constructed so that the blade material 3R slides slightly in front of the left blade material 3L. This prevents the two blade materials 3L and 3R from colliding and becoming unable to slide. There is no fault. The actual sliding movement of the blade materials 3L and 3R is Between 3L and the base frame body 21, and between the blade material 3R and the base frame body It is caused by the expansion and contraction of the expansion and contraction fluid pressure cylinders 13L and 13R installed between 21. . The expansion/contraction fluid pressure cylinders 13L and 13R always have the same amount of water by the quantitative distribution valve 71. It is configured to introduce fluid and at the same time expand and contract by the same length to cause the blade to Materials 3L and 3R are slid in opposite directions by the same distance.

[0011] To explain this in more detail based on Fig. 8, two expansion/contraction fluid pressure cylinders 13L and 13R are operated by a fluid pressure pump (not shown) using a single electromagnetic switching valve 7. The fluid pressure generated by the expand and contract at the same time. The operation of this electromagnetic switching valve 7 is performed by a solenoid 7a or a solenoid This is due to the excitation operation of the lead 7b.

0012 In addition, the actual movement distance of the blade materials 3L and 3R is The radar width detection mechanism 6 measures it. This blade width detection mechanism 6 is a pulse encoder. Measure the displacement of the blade materials 3L and 3R with respect to the base frame 21 using the The output signal is output as a pulse and the signal is transmitted to the comparison calculation section 8 which employs a microcomputer. (See Figures 3 and 5).

[0013] Therefore, in the comparison calculation section 8, the blur transmitted from the blade width detection mechanism 6 is detected. After recalculating the amount of blade material displacement to the actual blade running width, the blade width display mechanism 5, and output the calculated value to the blade width setting mechanism 4, which will be described later. The blade width is compared with the blade width and the blade width is controlled based on the comparison result. elaborate on this When the calculated value is narrower than the set blade width, the comparison calculation section 8 Excite the cylinder to apply fluid pressure to the bottom side of the expansion/contraction fluid pressure cylinders 13L and 13R, and Extend cylinders 13L and 13R to increase the displacement of blade materials 3L and 3R, and When the running width is expanded and the calculated value is wider than the set blade width, the comparison calculation unit 8 Excite the lenoid 7b to apply fluid pressure to the rod side of the expansion/contraction fluid pressure cylinders 13L and 13R. The cylinders 13L and 13R are retracted to reduce the displacement of the blade materials 3L and 3R. Therefore, the blade traveling width is reduced (see Fig. 5).

[0014] A blade width setting mechanism 4 and a blade width display mechanism 5 are installed in the driving cab of the snowplow M. will be installed. For the blade width setting mechanism 4, press the triangular mark on the sliding knob 41 By aligning it with the scale on the side, you can see the scale indicated by the triangle mark. The matched value is communicated to the comparison calculation unit 8 as a set width. In addition, the blade width display mechanism 5 The calculated value of the actual blade running width sent from the comparison calculation unit 8 is displayed digitally on the dial. indicate.

[0015] However, a snow removal worker who got into the snowplow M accidentally turned the blade width setting machine When the desired blade running width is input to the mechanism 4, the comparison calculation unit 8 automatically calculates the blade running width. The blade width is dynamically controlled to the set width, and is further displayed on the blade width display mechanism 5. This expansion and contraction of the blade running width is fully automated, and the current running width is displayed. , so you can clearly see the current travel width of the blade and easily check it while removing snow. It can be expanded or contracted according to road conditions.

[0016] This embodiment is as described above, but as shown in FIG. 9 or 10, the blade The width setting mechanism is forwarded to operate the hoist fluid pressure cylinder and reversal fluid pressure cylinder. Assembled into an integrated operation board with switches such as , work standby, grounding, pressing, and temporary avoidance. It is also possible to include In addition, a variable resistor is installed on the base frame, and the blade The contacts of the variable resistor are moved by sliding the material, and the variable resistor is Blade width can be detected by connecting an ammeter in series and applying a constant voltage. You may also configure a container.

[0017]

[Effect of the idea]

As described above, according to the present invention, the adjustment of the running width of the blade is automated and the work There is no longer a need to rely on the intuition of staff. In addition, if necessary, the driving width can be displayed and the snow plowing operation can be done easily. It can also increase line safety.

[0018] As described above, the snowplow blade width expansion/contraction device of the present invention has high utility value.

[Brief explanation of drawings]

FIG. 1 is a plan view of a snowplow according to the present embodiment.

FIG. 2 is a side view of the snowplow of this embodiment.

FIG. 3 is a rear view of the blade of this embodiment.

FIG. 4 is a sectional view of the blade of this embodiment.

FIG. 5 is a chart diagram in this embodiment.

FIG. 6 is a plan view of the front portion of the blade width setting mechanism in this embodiment.

FIG. 7 is a plan view of the front portion of the blade width display mechanism in this embodiment.

FIG. 8 is a circuit diagram in this embodiment.

FIG. 9 is a plan view of a modified example of the blade width setting mechanism.

FIG. 10 is a plan view of a modification of the blade width setting mechanism.

[Explanation of symbols]

11 Reversing fluid pressure cylinder 12 Fluid pressure cylinder for hoist 13 Expansion/contraction fluid pressure cylinder 21 Base frame body 22 Link material 23 bracket 3 Blade material 4 Blade width setting device 5 Blade width indicator 6 Blade width detector 7 Solenoid switching valve 71 Quantitative distribution valve 8 Comparison calculation section

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Ken Kai 30-7 Ishimoricho, Fukui City, Fukui Prefecture (72) Creator Masayuki Takahashi 6-15-12 Shimoyasuda, Maruoka-cho, Sakai-gun, Fukui Prefecture

Claims (2)

[Scope of utility model registration request] Claim 1: A device installed in a snowplow having a blade whose running width can be expanded or contracted by expanding or contracting a fluid pressure cylinder, the device being installed on a snowplow that changes the position of the movable part of the blade with respect to the position of the vehicle body or the non-movable part of the blade. A blade width detection mechanism that detects the current value of the running width of the blade by comparison and outputs it as an electric signal; a blade width setting mechanism that is provided in the driver's cab and can input a blade setting width; A control that expands or contracts the blade running width by comparing the blade setting width input to the setting mechanism and the current value of the blade running width detected by the blade width detection mechanism, and expanding or contracting the fluid pressure cylinder based on the comparison result. A blade width expansion/contraction device for a snowplow, characterized by having a mechanism. 2. The blade width of the snowplow according to claim 1, further comprising a blade width display mechanism provided in the driver's cab and outputting and displaying the current value of the blade travel width detected by the blade detection mechanism. Scaling device.