JP2019138818A - Loosening reinforcing member of adjustment screw for shaft gauge - Google Patents

Abstract

To provide an enhancing member of a loosening screw used for an adjustment screw of an existing shaft gauge.SOLUTION: A member is composed of a bolt portion 1 and nut portion 2 having a cylindrical body of an about the same diameter as that of the through hole B of a loading plate A, and 2 washers 7 and locking rings 8. A hexagonal-shape recess 3 is formed in the upper portion of the bolt portion 1 and a male screw bolt 5 is formed in the bottom portion, a hexagonal-shape convex portion 4 is formed in the top portion in the axial direction and a female screw hole 6 of an appropriate depth is formed in the top portion of the nut portion 2, and 2 flat washers 7 and a locking ring 8 are arranged between the bolt portion 1 and the nut portion 2 in the screw portion.SELECTED DRAWING: Figure 1

Description

The present invention relates to a loosening prevention reinforcing member for an adjusting screw used for a loading plate of an existing axle weight meter.

In recent years, freight transportation using larger and heavier vehicles has played an important role indispensable for the development of the industrial economy as well as daily life.
On the other hand, the passage of vehicles that violate laws and regulations such as overloading on expressways is likely to reduce the safety of automobiles and cause serious accidents, and is also a factor that disrupts road damage and transportation order.

In order to reduce these defective factors, a machine for measuring the weight of the traveling vehicle, which is a shaft weight meter provided with a loading plate on which the traveling vehicle is mounted, is installed at the entrance of the expressway.
This axle load meter is composed of various devices such as a sensor detection unit, a danger detection alarm buzzer, a warning display plate, a recording device such as a printer, etc., and a pointing device that performs computer processing between these devices. Signals sent to the toll gate after converting the load of the vehicle that passed are stored and compiled as axle load data in a personal computer, and are part of the highway maintenance data.

There are adjustment screws and through holes through which the same shape locking screws are inserted at the four corners of the load plate of the existing axle load meter, and a high nut that allows the adjustment screws and locking screws to be screwed under them. Is fixed by welding.
The existing adjustment screw and lock screw use a grub screw bolt, the shape of which is a hexagonal hole at the top and a flat tip at the bottom. Normally, two sets of adjustment screws and their lock screws are used. It is used. (See FIG. 2).

The adjustment screw of the grub screw bolt is dropped from the through holes at the four corners of the load plate of the axle load meter, the hexagonal bar wrench is used to tighten the adjustment screw to the high nut, and it is placed on the sensor under the high nut, and four adjustments are made. After adjusting the load plate so that the load is evenly applied to the entire load plate with screws, the loose screw of the thread screw bolt is similarly tightened to prevent double lock.

Generally, a method using a spring washer and a double nut is often used to prevent the screw from loosening. In addition, for example, an adhesive is applied to one screw portion. 2 Claws and grooves for locking are provided on bolts, nuts, washers, etc. A method of providing a wedge effect on the shape of the three double nuts has been developed. As a known technique, there is JP-A-2003-227508. (For example, Patent Document 1)

JP 2003-227508 A

However, various screw stoppers that have been developed, including Patent Document 1, are mostly for the purpose of fastening a material to be fastened. A male screw bolt having a hexagonal locking portion on the head and a female screw screwed onto the male screw bolt It is intended for nuts.
Therefore, it cannot be used as an adjusting screw or a locking screw for a female screw bolt that is screwed into a high nut fixed to the lower surface of an existing loading plate.

Four adjustment screws of the grub screw bolt used for the loading plate of the existing axle load meter are placed on the sensor part through a high nut, and the purpose of holding the loading plate horizontally with the four adjustment screws and the load are It is for adjusting so that it is applied evenly, and the repulsive force that the adjusting screw tries to return by the load and vibration applied to the loading plate is double-tightened with a similar potato screw bolt to form a locking screw.

In the conventional method, as described above, the loading plate is always loaded in the axial direction and doubled to prevent the adjustment screw from returning due to vibration. This is an application of the tensile force of the bearing and the frictional force of the bearing surface between the adjusting screw and the locking screw.
However, since the hexagonal hole is formed on the upper surface of the adjusting screw used for the adjusting screw, the seating area is reduced, and the lowering of the upper and lower seating surface frictional forces is inevitable.

In other words, since the head of the bolt is locked to the material to be fastened in the double nut that is normally used, the tightening effect can be obtained from the first stage nut, and by tightening the second stage nut, Further, a compressive force is generated, and a tensile force acts between the nuts by tightening the double nut.
On the other hand, the first-stage adjustment screw using the loader plate's thread screw bolt is only for load receiving and height adjustment of the load plate, and the lower end of the adjustment screw is not fixed, so the second-stage loosening Only the tightening effect of the set screw was obtained, and the same effect as the above double nut could not be expected.

Furthermore, the axial force of the adjusting screw and the locking screw is released in order to receive vibration when passing through the vehicle while being slightly compressed in the axial direction by the vehicle weight. Due to the continuity of repulsive force and vibration, the balance between the tensile force and the external force is lost and the loosening screw gradually loosens.
For this reason, it is necessary to periodically adjust the adjustment screw. During this time, the axle load scale cannot be used, which hinders the smooth operation of the expressway.

In addition, a hexagonal hole is provided in the upper part of the thread screw bolt of the adjusting screw and the locking screw, and a thread groove is formed on the outer peripheral surface, so the thickness around the hexagonal hole is thin. Could be damaged.
For this process, it is necessary to repair the heavy loading plate by turning it over with a heavy machine, which is a very difficult task, and the axle load scale cannot be used for a long time until the work is completed. It was a big problem.

The present invention has been made in order to solve the above-described problems, and provides a loosening prevention reinforcing member that directly utilizes components used in an existing axle weight meter.

Bolt portion obtained by splitting up and down a cylindrical body approximately equal to the diameter of the through hole of the above-described load plate, through which the adjustment screw is inserted, and which is a member for preventing loosening of the adjustment screw used for the existing load balance loading plate And two nuts, two plain washers interposed therebetween, and a locking ring mounted between the two plain washers.
A hexagonal recess is formed in the upper part of the bolt and a male screw bolt is formed in the lower part, and a female screw hole of an appropriate depth is formed in the upper part of the nut and a hexagonal convex part is formed in the lower part.

  The object of the present invention is to make use of the components used in the existing axle weight as it is, and the effect of the existing locking screw can be enhanced by using a new locking prevention reinforcing member. The maintenance work of the adjustment screw of the sensor sensing part of the board can be simplified.

The hexagonal convex part at the bottom of the nut part of the present invention is fitted into the hexagonal hole at the upper part of the locking screw of the existing thread screw bolt to prevent rotation, and a flat washer, locking ring, flat All you have to do is install the washers in order and tighten them into the nuts.

  Since the loosening prevention reinforcing member of the present invention is a cylindrical body having the same diameter as the through hole of the existing loading plate, the thickness around the hexagonal concave portion at the top of the bolt portion can be increased, and the through hole of the loading plate can be Even if it is inserted, there is little backlash, and it can be easily fitted into the hexagonal hole on the upper part of the locking screw using the existing thread screw bolt.

The present invention does not require a special tool or machine for construction, and can be constructed in a short time using a conventional tool. The locking ring between the two plain washers is pressed in the axial direction by the bolt portion, and is horizontal. The outer peripheral edge of the locking ring whose diameter is expanded in the direction is pressed against the inner wall of the through hole of the loading plate to enhance the locking screw effect.

The division | segmentation perspective view of one Example of this invention Installation cross section of existing loading plate adjustment screw Sectional drawing of one Example which mounted this invention on the existing loading board The expanded sectional view of one Example in the modification of the locking ring of the present invention The division | segmentation perspective view of one Example of this invention 2

The present invention is a loosening prevention reinforcing member for the loosening prevention screw E of the adjusting screw D using the thread screw bolt used for the existing axle load carrying plate A, and the adjustment screw D and the loosening prevention screw E are inserted. It is composed of a bolt portion 1 and a nut portion 2 obtained by dividing a cylindrical body having the same diameter as the through hole B of the loading plate A, and two plain washers 7 and a locking ring 8 interposed therebetween. ing.
A hexagonal recess 3 is formed in the upper part of the bolt part 1 and a male screw bolt 5 is formed in the lower part. A female screw hole 6 having an appropriate depth in the axial direction is formed in the upper part of the nut part 2 and a hexagonal convex part is formed in the lower part. Part 4 is formed.
Two flat washers 7 are installed between the bolt part 1 and the previous nut part 2, and the locking ring 8 is mounted between the two flat washers 7.

The loosening-screw-enhancement member of the present invention is intended to make use of existing components of an axial weight meter as they are, and a hard rubber ring, a hard resin ring, a metal ring, or the like is used as the locking ring 8.
By adjusting the bolt portion 1 in the axial direction by tightening the bolt 1, the outer peripheral edge of the locking ring 8 is expanded in the horizontal direction, and the inner wall of the through hole B of the loading plate A is pressed to adjust the existing axle load The loosening set screw E effect of the screw D is further enhanced.
In addition, it is a loosening screw reinforcing member that can be easily removed during maintenance.

The following description is based on each drawing.
FIG. 1 is a divided perspective view of an embodiment of the present invention.
The bolt weight adjusting member of the present invention includes a bolt portion 1 and a nut portion 2 obtained by dividing a cylindrical body having the same diameter as the through hole B of the existing shaft weight loading plate A into upper and lower parts, and It consists of two plain washers 7 and a locking ring 8 that are mounted between them.
A hexagonal recess 3 is formed in the upper part of the bolt part 1 and a male screw bolt 5 is formed in the lower part. A female screw hole 6 having an appropriate depth in the axial direction is formed in the upper part of the nut part 2 and a hexagonal convex part 4 in the lower part. Are formed on the same axis.

FIG. 2 is an installation cross-sectional view of an existing loading plate adjusting screw.
At the four corners of the existing axle weight loading plate A, there are drilled through holes B with a diameter of 24 mm, through which an adjusting screw D and a locking screw E with a nominal screw diameter of 20 mm are inserted. Under the through hole B, a high nut C that fits the adjusting screw D and the locking screw E is welded.
The four adjustment screws D are dropped from the through hole B of the loading plate A, and the adjustment screw D screwed to the high nut C is tightened with a hexagon wrench and placed on the sensor portion F, and the loading plate A is horizontally placed. After holding and adjusting so that the load is evenly applied, a similar setscrew screw E of the same thread screw bolt is tightened double to prevent the locking.

FIG. 3 is a sectional view of an embodiment in which the present invention is mounted on an existing loading plate.
Based on FIG. 3, a work procedure and actions / effects will be described below.
A flat washer 7, a locking ring 8, and a flat washer 7 are mounted in this order on the male screw bolt 5 at the bottom of the bolt part 1, and are screwed into the female screw hole 6 of the nut part 2 in a hand-tightened state. The hexagonal convex part 4 at the lower part of the nut part 2 is fitted into the hexagonal hole at the upper part of the existing adjusted locking screw E to prevent the rotation.

Next, a hexagonal bar wrench is fitted into the hexagonal recess 3 at the top of the bolt part 1 and the locking ring 8 mounted between the two flat washers 7 is pressed in the axial direction as the bolt part 1 is tightened. The outer peripheral edge of the locking ring 8 whose diameter is expanded in the horizontal direction is strongly pressed against the inner wall of the through hole B, thereby further enhancing the effect of the existing locking screw using the thread screw bolt.

FIG. 4 is an enlarged cross-sectional view of an embodiment of a modified embodiment of the locking ring according to the present invention.
In the present invention, various shapes of the locking ring 8 that can bring about the same effect are conceivable. FIG. 4 is an example of a modified embodiment of the locking ring 8, and the side cross-section of the locking ring 8 is outside the bolt hole. It has a spring shape that is substantially V-shaped toward the periphery, and the loading plate A has an outer periphery that is expanded in the horizontal direction by pressing in the axial direction by tightening the bolt 1. The force that presses the inner wall of the through hole B is utilized.
In addition, as for the shape of the said locking ring 8, either an upper or lower surface may be made horizontal.

FIG. 5 is a divided perspective view of an embodiment of the second aspect of the present invention.
The present invention has the same member configuration as that of claim 1, but the tapered portion 9 is provided at the base of the male screw bolt 5 of the bolt portion 1 and the tapered portion 9 is fitted to the upper portion of the female screw hole 6 of the nut portion 2. The joint 10 is provided, and the thickness 12 of the nut portion 2 is cut in the axial direction 12.

That is, by screwing the bolt part 1, the inner wall of the through hole B of the loading plate A is press-contacted by the outer periphery obtained by expanding the locking ring 8 from the inside by the wedge effect of the taper part 9, and the bolt part 1 is further screwed. Thus, the fitting port 10 of the nut portion 2 is expanded by cutting the notch 12 with the taper portion 9, and the loosening prevention effect in two stages of pressing the inner wall of the through hole B on the outer peripheral surface of the nut portion 2 is exhibited.

With the adjusting screw and the locking screw that use double thread screw bolts, which are used for existing axle weight loading plates, the load is always applied to the loading plate and the vibration when the vehicle moves, A repulsive force is exerted in the direction, and it is inevitable that the setscrew will gradually loosen, and maintenance and management of the adjustment screw are regularly performed.
The present invention makes use of the existing components of the axle weight meter as it is, and further enhances the effect of the conventional loading plate loosening screw using a new loosening prevention reinforcing member, so that the frequency of maintenance management work of the adjusting screw is increased. As a result, the smooth operation of the expressway is promoted and it contributes to the industry.

DESCRIPTION OF SYMBOLS 1 Bolt part 2 Nut part 3 Hexagon-shaped recessed part 4 Hexagon-shaped convex part 5 Male thread bolt 6 Female thread hole 7 Plain washer
8 Locking ring 9 Tapered part 10 Fitting port 11 Thickness 12 Cut A Loading plate B Through hole C High nut D Adjusting screw E Loosening screw F Sensor part G Welding part H Hexagonal hole

Claims (2)

Bolt part and nut part, which is a loosening prevention member of an adjustment screw used for a load plate of a shaft weight meter, and is divided vertically into a cylindrical body having the same diameter as the through-hole of the load plate through which the adjustment screw is inserted , And two plain washers interposed between them, and a locking ring mounted between the two plain washers, and a hexagonal recess in the upper part of the bolt part and a male screw bolt in the lower part, A nut prevention enhancement member for a shaft weight adjustment screw, wherein a female screw hole having an appropriate depth in the axial direction is formed in the upper portion of the nut portion and a hexagonal convex portion is formed in the lower portion. A loosening prevention member for the shaft weight adjusting screw, wherein a taper portion having an appropriate length is formed at the base of the male screw bolt of the bolt portion, and the taper portion is formed above the female screw hole of the nut portion. A loosening prevention reinforcing member for an adjustment screw for a shaft weight meter, wherein a fitting port is provided, and a thickness of the nut portion is cut in an axial direction.