JP6674231B2 - Electric pole carrier - Google Patents

Description

  The present invention relates to a utility pole transport trolley, and more particularly, to a utility pole transport trolley for loading and transporting a utility pole, which is a long and heavy object, in a horizontal state.

  For new distribution work or replacement work for utility poles, concrete pillars may be required. At this time, a utility pole carrier that travels manually from the utility pole carrier vehicle to the construction site is used to transport the concrete pillars to a narrow path where the utility pole carrier vehicle (automobile) cannot enter. In general, telephone pole trolleys are independently adopted by each sales base, and standards for strength and specifications for safety devices are not standardized at present, and the number of workers required for work and the shape of trolleys are four wheels and so on. There are various types such as two wheels.

  As an example of a utility pole carrier, there is a utility pole carrier device disclosed in Patent Document 1, for example. This electric pole transport device is composed of three blocks, a front bogie, a rear bogie, and an operation unit. The front bogie includes a telephone pole rest on which the electric pole is mounted substantially parallel to the wheels, and a telephone pole mounted on the pole rest. An electric pole fixing device to be fixed and a vehicle body composed of a pair of wheels are provided, and the rear bogie is provided above the vehicle body, and at least one wheel rotatably and freely attached to the vehicle body. A rear pole comprising a telephone pole holder on which the telephone pole is mounted and a telephone pole fixing device for fixing the telephone pole mounted on the telephone pole holder to the telephone pole holder is provided. It is provided with a supporting plate that is in contact, a T-shaped grip portion erected above the supporting plate, and a fixture that fixes the supporting plate to a utility pole.

  A four-wheeled electric pole transport trolley can easily maintain a horizontal state, but cannot move up and down the end of the electric pole, has a limitation in avoiding obstacles, and requires many workers (for example, six workers). In this respect, the two-wheeled electric pole transport cart has advantages in that the turn is effective, the end of the electric pole is easily moved up and down, obstacles can be avoided, and the number of workers can be reduced (for example, 2 to 4 persons).

Published Japanese Utility Model Application No. 2-31208

  However, in a two-wheeled electric pole carrier, there is a possibility that the pole of the electric pole loaded with the electric pole carrier inclined and colliding with the ground due to a sudden stop during traveling. Further, at this time, there is a danger that the worker is pinched and injured, and thus there is a strong demand for improving the safety of the utility pole carrier.

  In view of the foregoing, an object of the present invention is to provide a utility pole carrier with improved safety for workers, loading stability of utility poles, and improved usability.

In order to solve the above-mentioned problem, the invention according to claim 1 has a loading section on which a utility pole is placed in a utility pole transporting trolley for loading and transporting a utility pole that is a long and heavy object in a horizontal state. A vehicle frame, a pair of main wheels provided on both sides of the vehicle frame, and a pair of auxiliary legs pivotally supported on the front and rear of the vehicle frame, respectively, and rotatable in the front-rear direction, wherein the auxiliary legs are It is possible to transition between a retracted state retracted inside the vehicle frame by rotation and a use state protruding diagonally downward on the outside of the vehicle frame, and the auxiliary leg in the use state is such that the vehicle frame on which the telephone pole is mounted is in a horizontal state. In some cases, the vehicle frame is not grounded, and further grounded at an inclined position where the front end or the rear end of the power pole does not contact the road surface when the vehicle frame on which the power pole is mounted is inclined forward or backward. is formed so as to prevent the inclination, The vehicle frame includes an upper frame positioned below the loading portion, a lower frame positioned below the upper frame, and a pair of front and rear support members erected to connect the upper frame and the lower frame. Wherein the pair of auxiliary legs are pivotally supported at positions of the pair of support members near the lower frame .

The present invention according to claim 2 in order to solve the above described problems is the utility pole transportation trolley according to claim 1, the distal end of the auxiliary leg is characterized in that the wheels are mounted.

According to a third aspect of the present invention, there is provided a utility pole carrier according to the first or second aspect , wherein a guard frame is provided around the main wheel and / or the auxiliary leg to protect an operator. Is provided.

According to a fourth aspect of the present invention, in order to solve the above-mentioned problem, in the utility pole carrier according to any one of the first to third aspects, the center of gravity of the utility pole in a horizontal state is set at the center of the utility pole carrier. It is characterized in that there is provided a hook for a utility pole carrier that also functions as a guide for positioning on a certain axle.

According to a fifth aspect of the present invention, there is provided a utility pole carrier according to any one of the first to fourth aspects, further comprising a braking device for stopping the main wheels, wherein the braking is performed. The apparatus is provided with a brake operation lever for braking and stopping the main wheel, and a brake fixing operation knob for holding the main wheel in a stopped state.

  ADVANTAGE OF THE INVENTION According to the telephone pole transport trolley which concerns on this invention, there exists an effect that safety, loading stability, and usability can be improved.

1 is a perspective view showing a preferred embodiment of a utility pole carrier according to the present invention. It is a top view of an electric pole transport trolley. It is a side view of an electric pole transport trolley. It is a side view which shows the state which stored the auxiliary leg of the utility pole carrier. It is a perspective view which shows the state which stored the auxiliary leg of the telephone pole transport trolley. It is a right view which shows the storage mechanism of an auxiliary leg. It is a front partial view which shows the storage mechanism of an auxiliary leg. It is a perspective view which shows the attachment state of a lock pin and a lynch pin. It is a perspective view showing one embodiment of a lock pin and a lynch pin.

[Composition of telephone pole carriage]
Hereinafter, a telephone pole carrier according to the present invention will be described in detail based on a preferred embodiment. FIG. 1 is a perspective view showing an embodiment of a utility pole carrier according to the present invention, FIG. 2 is a plan view of the utility pole carrier, and FIG. 3 is a side view of the utility pole carrier. The illustrated electric pole transport trolley 1 is generally provided with a vehicle frame 2 having loading portions 20, 20 on which electric poles P (see FIG. 3) are mounted at two front and rear positions, and approximately at the center on both left and right sides of the vehicle frame 2. When the vehicle frame 2 on which the pair of main wheels 3 and 3 provided with the electric pole P is inclined forward or backward, the front or rear end of the electric pole P contacts the ground at an inclined position where it does not contact the road surface. And a pair of auxiliary legs 5, 5 which are disposed before and after the vehicle frame 2 so as to regulate the inclination of the vehicle frame 2 and have an auxiliary wheel 4 attached to each end. The utility pole carrier 1 is formed based on a so-called parallel two-wheeled vehicle.

  The vehicle frame 2 includes an upper frame 22 and a lower frame 23 by welding a metal material such as a square steel material or the like, and includes a pair of front and rear support members 24, 24 connecting the upper frame 22 and the lower frame 23 at four corners, It is formed in a rectangular frame structure in plan view. Further, stoppers 21 and 21 for preventing rolling of the placed utility pole P are provided on the loading portions 20 and 20 located on the upper part of the vehicle frame 2. Further, main wheels 3, 3 provided with rubber tires are mounted on the same axis on both left and right sides of a central portion of the vehicle frame 2 in the front-rear direction. Auxiliary legs 5, 5 are attached to the front and rear of the vehicle frame 2, and auxiliary wheels 4, 4 are attached to the tips of the auxiliary legs 5, 5, respectively. Around the main wheels 3, 3, main wheel guard frames 6, 6 each formed of a metal bar or pipe in a frame shape are attached to the vehicle frame 2 so as to surround the main wheels 3, 3. Similarly, around the auxiliary wheels 4, 4, auxiliary wheel guard frames 7, 7 are attached to the auxiliary legs 5, 5 so as to surround the auxiliary wheels 4, 4. This prevents an accident such as a step on a worker's foot or the like by the main wheels 3, 3 or the auxiliary wheels 4, 4.

  At the center of the upper frame 22 on both the left and right sides, hanging tool hooks 29, 29 for lifting the utility pole carrier 1 by a crane mounted on the vehicle are provided. The hanging tool hooks 29, 29 also have a function as a guide for positioning the center of gravity of the utility pole P in the horizontal state at the center of the vehicle frame 2 of the utility pole carrier 1.

The main wheels 3 are designed to withstand the combined weight (2,050 kg) of the weight of the utility pole P (about 1,700 kg) and the own weight (about 350 kg) of the utility pole carrier 1. Specifically, the allowable load wt1 per main wheel 3 is obtained by the following equation.
wt1 = [(loading load + bogie load) x safety factor] / 2
= [(1,700 + 350) × 1.6] / 2 = 1,640 [kg]
Therefore, the main wheels 3, 3 have an allowable load of 1,640 kg or more, and take into consideration the balance between rolling resistance and tire rigidity.

  As shown in FIG. 5, the auxiliary legs 5, 5 are each rotatable in the front-rear direction (left-right direction in FIG. 3) with the upper end side as a fulcrum, and are formed so that they can be individually retracted inward. Have been. The auxiliary legs 5, 5 are arranged in a state where they are pivotally supported by a pair of front and rear support members 24, 24 erected so as to connect the upper frame 22 and the lower frame 23 constituting the vehicle frame 2. The auxiliary legs 5, 5 are provided to prevent the leading or trailing end of the loaded utility pole P from colliding with the ground when the utility pole carrier 1 is inclined forward or backward. When the vehicle frame 2 is in a substantially horizontal position, it is set at a position higher than the grounding level of the main wheels 3, and is attached to the front or rear ends of the auxiliary legs 5, 5 when the vehicle frame 2 is tilted forward or backward. One of the auxiliary wheels 4 and 4 and the main wheel 3 are in contact with the ground. That is, in the use state, the auxiliary legs 5, 5 have their ends exposed from a tangent line connecting the lower end of the end or the rear end of the loaded utility pole P and the lower surfaces of the main wheels 3, 3, and the vehicle frame 2 is in a horizontal state. At one point the tip is off the ground.

  FIG. 6 is a right side view showing the storage mechanism of the auxiliary leg, and FIG. 7 is a front partial view showing the storage mechanism of the auxiliary leg. FIG. 8 is a perspective view showing an attached state of the lock pin and the linch pin, and FIG. 9 is a perspective view showing an embodiment of the lock pin and the linch pin. A pair of auxiliary leg fixing pin support plates 25, 25 are attached to the support member 24 on both sides of the support leg end of the auxiliary leg 5, and end portions of the auxiliary leg fixing pin support plates 25, 25 near the main wheel 3. Are provided with pin holes 26, 26, respectively. Lock pins 27 (see FIGS. 6 and 9) for maintaining the retracted state when the auxiliary leg 5 is flipped inward and stored are inserted through the pin holes 26, 26, and the auxiliary leg fixing pin support plate 25 is provided. The lock pin 27 is fixed to the tip end of the lock pin 27 protruding from the lock pin 30 so that the lock pin 27 does not come off.

  As shown in FIG. 9, the lock pin 27 includes a rod-shaped body 31, a handle 32 provided at one end thereof, and an insertion hole 33 provided at the other end of the body 32. The lynch pin 30 includes a rod-shaped body portion 34 having an outer diameter that can be inserted into the insertion hole 33 and a lock ring 35 attached to one end. The lock ring 35 has a circular shape and can be rotated in the direction indicated by the arrow. For example, after inserting the torso 34 into the insertion hole 33, the lock ring 35 is turned in the direction a to engage the other end of the torso 31 so that the torso 34 can be prevented from falling out of the torso 31. .

  The auxiliary legs 5 have pin holes 28 used to fix the auxiliary legs 5 so as not to return to the retracted state when the auxiliary legs 5 are pulled out and used. 24, 24 are provided at the lower end of each. The pin holes 28, 28 overlap the pin holes 26, 26 when the auxiliary leg 5 is used as shown in FIG. 3, and the lock pin 27 can be inserted into the overlapped pin holes 26, 28. The leg 5 is locked so that rotation is prevented.

  Here, each state of the auxiliary legs 5, 5 will be described. The auxiliary legs 5, 5 have three states: a use state, a storage state, and an open state. The use state is a state in which the auxiliary legs 5 and 5 are pulled out and fixed with the lock pins 27, and are mainly used when mounting the utility pole P (for ensuring safety), when traveling alone (for ensuring safety in the front-rear direction), This is a state that is adopted during transportation of electric poles (to prevent grounding of the front and rear ends of the loaded pole) and during transportation (to ensure stability during transportation). The retracted state is a state in which the auxiliary legs 5 and 5 are flipped up and fixed with the lock pins 27, and are mainly used when storing and transporting the electric pole transport trolley 1 or during transportation (to reduce the front and rear dimensions). is there. The open state is a state in which the lock pins 27 are removed to make the auxiliary legs 5 and 5 free. Mainly when the obstacle at the pole end is avoided (to improve workability), the pole setting (building pole) work is performed. It is a state that is adopted at the time (to ensure the safety of pole work). In this way, the auxiliary legs 5, 5 are set in an appropriate state according to the working state.

When the utility pole P is directly erected from the utility pole transporting trolley 1 by a crane during the utility pole installation work, a concentrated load is temporarily applied to the auxiliary wheel 4 at the base of the utility pole P. Therefore, it is necessary to examine the auxiliary wheels 4 and 4 as well. Here, assuming that the distance from the center of gravity of the telephone pole P to the lifting position is 1,500 mm and the distance from the center of gravity of the telephone pole P to the auxiliary wheels 4 and 4 is 1,000 mm, the concentrated load Wt2 applied to the auxiliary wheels 4 and 4 is given by the following equation. Required by
Wt2 = Safety factor × Loading load × 1,500 / (1,500 + 1,000)
= 1.6 × 1,700 × 1,500 / 2,500 = 1,632 [kg]
From this result, the permissible load of the auxiliary transports 5, 5 is 1,632 kg or more.

The main wheels 3 are provided with a disc brake 8 as a braking device. The disc brake 8 is operated by operating a brake operation lever 9. The conditions that the disc brake 8 should have are as follows.
(A) Since the electric pole transport trolley 1 is a human-powered movement, the speed is set to be equal to or less than the human walking speed (4 km / h = 1.1 m / sec).
(B) The ordinary road on which the utility pole carrier 1 is operated has a vertical gradient of 9% or less according to Article 20 of the Road Structure Ordinance. From this, it was determined that the braking by the disc brake 8 had a safe stopping ability from a moving speed of 1.1 m / sec, and also had a stopping ability on a road with a gradient of 9%.

  In consideration of the above, a mechanical disc brake was used as the disc brake 8, and this was installed inside each of the main wheels 3 and 3. The connection between the disc brake 8 and the brake operating lever 9 is of a link type. Incidentally, the brake operation lever 9 is formed in a gate shape and is arranged near the upper portion of the main wheel guard frames 6, 6 which are also used as a traveling operation handle. When the brake operating lever 9 is pulled toward the user, the disc brake 8 operates to apply braking. The brake operation lever 9 can be operated on either the left or right side. Then, when the brake fixing operation knob 11 is turned in a predetermined direction while pulling the brake operation lever 9, the brake operation lever 9 is fixed, the brake is continuously operated, and the parking brake is established. The brake is released by turning the brake fixing operation knob 11 to the opposite side.

[Operation of telephone pole carriage]
Next, the operation of the above-described electric pole transport trolley 1 will be described. First, the utility pole carrier 1 is carried on a work vehicle and transported to a position near a predetermined pole. The auxiliary legs 5, 5 of the utility pole carrier 1 during transportation may be in either the retracted state or the use state. In the retracted state, the overall length of the utility pole transport trolley 1 is shorter than in the used state, so that it can be appropriately selected according to the work vehicle. When the vehicle arrives at a predetermined place, it is removed from the work vehicle. If the auxiliary legs 5, 5 of the utility pole carrier 1 are in the retracted state, the auxiliary legs 5, 5 are pulled out so that the auxiliary legs 5, 5 do not rotate. It is fixed with a lock pin 27 and a lynch pin 30.

  Next, the operator transfers one of the utility poles P loaded on the work vehicle onto the utility pole transporting trolley 1 by a crane or the like. In this case, by turning the brake fixing operation knob 11 in a predetermined direction while pulling the brake operation lever 9 toward the front, the brake operation lever 9 is fixed and parking brake is performed, and the utility pole carriage 1 is stopped firmly. By using the hanging hooks 29, 29 as a guide for locating the center of gravity of the utility pole P in the horizontal state, the longitudinal direction of the utility pole transporting trolley 1 and the length direction of the utility pole P are appropriately adjusted to position the center of gravity of the utility pole P. Is positioned at the center of the electric pole transport trolley 1, and the electric pole P is lowered in that state, and is placed on the loading units 20, 20. The placed electric pole P is positioned and arranged on the stacking units 20 and 20 in a state where the rotation is restricted by the stoppers 21 and 21. Next, the worker hangs a rope or the like (not shown) between a pair of utility pole fixing hooks 10 provided on both front and rear sides of the car frame 2 and places the utility pole P on the car frame 2 so that the utility pole P does not move forward, backward, left, and right. Firmly.

  The utility pole transport trolley 1 is usually moved by two workers to the pole position. When moving, the operator operates the brake operation lever 9 to release the braking of the disc brake 8. Then, the electric pole transporting trolley 1 is moved to the pole position while pushing in the traveling direction. For the movement, two workers are located on both sides of the rear part of the utility pole carrier 1 and push forward using the main wheel guard frames 6, 6 located in front of them as a traveling operation handle. The operator located on the left side pushes strongly when traveling the utility pole carrier 1 in the right direction, and the operator located on the right side pushes strongly when traveling the utility pole carrier 1 in the left direction. When moving backward, the utility pole carrier 1 is pulled backward, and when rotating, the operator pushes and pulls respectively. When avoiding an obstacle, the auxiliary legs 5, 5 are appropriately opened.

  When the vehicle arrives at the pole position, the brake operating lever 9 is operated to brake by the disc brake 8, and the utility pole carrier 1 is parked by the brake operating lever 9 and the brake fixing operation knob 11, and is stopped firmly. Then, the worker removes the lynch pin 30 and the lock pin 27 of the auxiliary legs 5 and 5, and makes the auxiliary legs 5 and 5 open. Then, after the rear end of the utility pole P is grounded, the ropes are removed from the utility pole fixing hooks 10 and 10 and the utility pole P, and the operation shifts to the construction work of erection of the utility pole P and burying the lower end thereof.

  When the construction work is completed, the auxiliary legs 5, 5 are pulled out and locked by the lock pin 27 and the lynch pin 30, and the auxiliary legs 5, 5 are used. Then, the utility pole carrier 1 is independently driven to the work vehicle and loaded on the carrier.

[Effects of Embodiment]
According to the utility pole transport trolley 1 according to the present embodiment, when the vehicle frame 2 on which the utility pole P is mounted is inclined forward or backward, the tip or the rear end of the utility pole P is grounded at an inclined position where it does not come into contact with the road surface. Since the auxiliary legs 5 arranged to prevent the inclination of the vehicle frame 2 are provided, the handling is easy, and even when the vehicle frame 2 is inclined, the front or rear end of the placed utility pole P collides with the ground. This has the effect of preventing

  In addition, since the auxiliary leg 5 is rotatable and can be flipped up and pulled out, the auxiliary leg 5 can be made compact by reducing the overall length by storing the auxiliary leg 5 in a retracted state. This makes it possible to improve small turning, loading and unloading on a work vehicle, and reduction of storage space.

  Further, since the auxiliary leg 5 can be held (locked) in the retracted state and the use state by the lock pin 27 and the lynch pin 30, the auxiliary leg 5 can be prevented from moving freely in the retracted state and the use state, thereby providing safety. There is an effect that the property can be secured.

  Further, when the auxiliary legs 5 are pulled out from the vehicle frame 2, the auxiliary wheels 4 are protruded outside the vehicle frame 2, so that there is an effect that the stability at the time of loading the electric pole, transporting the electric pole, and at the time of traveling is improved.

  Further, since the main wheels 3 and 3 can be stopped by the disc brake 8 as a braking device and stopped by the brake operation lever 9 and the brake fixing operation knob 11, it is possible to prevent the utility pole carriage 1 from moving freely. There is an effect that safety can be ensured by being prevented.

  As described above, the preferred embodiment of the present invention has been described in detail, but the present invention is not limited to such a specific embodiment, and within the scope of the present invention described in the claims, It goes without saying that various modifications and changes are possible. For example, a wooden pole may be used instead of a concrete power pole, and further, it is applicable to a long object other than the power pole P, for example, wood, a metal pipe, a resin pipe, and a building material.

DESCRIPTION OF SYMBOLS 1 Telegraph pole carrier 2 Car frame 3 Main wheel 4 Auxiliary wheel 5 Auxiliary leg 6 Guard frame for main wheels 7 Auxiliary wheel guard frame 8 Disc brake 9 Brake operation lever 10 Electric pole fixing hook 11 Brake fixing operation knob 20 Loading part 21 Stopper 22 Upper frame 23 Lower frame 24 Support member 25 Auxiliary leg fixing pin support plate 26, 28 Pin hole 27 Lock pin 29 Hanging device hook 30 Linch pin 31, 34 Body 32 Handle 33 Insertion hole 35 Lock ring

Claims (5)

In a utility pole transport trolley for loading and transporting a long heavy electrical pole in a horizontal state,
A vehicle frame having a loading portion for mounting the telephone pole,
A pair of main wheels provided on both sides of the vehicle frame,
A pair of auxiliary legs pivotally supported in front and rear of the vehicle frame, and rotatable in the front-back direction,
With
The auxiliary leg can transition between a retracted state retracted inside the vehicle frame by the rotation and a use state protruding diagonally downward on the outside of the vehicle frame,
The auxiliary leg in use state is not grounded when the vehicle frame on which the power pole is mounted is in a horizontal state, and when the vehicle frame on which the power pole is mounted inclines forward or backward, The tip or the rear end is formed so as to contact the ground at an inclined position where it does not contact the road surface to prevent further inclination of the vehicle frame ,
The vehicle frame includes an upper frame positioned below the loading portion, a lower frame positioned below the upper frame, and a pair of front and rear support members erected to connect the upper frame and the lower frame. With
The electric pole transport trolley, wherein the pair of auxiliary legs are pivotally supported at positions of the pair of support members near the lower frame . The utility pole carrier according to claim 1 ,
A utility pole carrier, wherein wheels are attached to tips of the auxiliary legs. The utility pole carrier according to claim 1 or 2 ,
A utility pole carrier having a guard frame provided around the main wheel and / or the auxiliary leg to protect an operator. The utility pole carrier according to any one of claims 1 to 3 ,
A utility pole carrier which is provided with a hook for the utility pole carrier which also functions as a guide for positioning the center of gravity of the utility pole in a horizontal state on an axle which is the center of the utility pole carrier. The utility pole carrier according to any one of claims 1 to 4 ,
Further, a braking device for stopping the main wheel is provided,
The braking device includes:
A brake operation lever for braking and stopping the main wheel;
A brake fixing operation knob for holding the main wheel in a stopped state,
An electric pole transport trolley comprising:

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