JPH079870Y2 - Drum support mechanism for cable extraction - Google Patents

Description

[Detailed Description of Device] a. Object of the Invention (Industrial field of application) The present invention relates to a device capable of sequentially loading and unloading a plurality of cable drums, and further to a mechanism for drawing out a cable wound on the drum in such a device.

(Prior Art) When performing electrical work such as installation and maintenance of power distribution equipment, it is common to shut off the power from the power supply source for worker safety. For this reason, during the construction, power supply destinations (general households, companies, etc.) around the construction site were often in a power outage state. However, due to the widespread use of computers in recent years, there is an increasing demand for avoiding the above power outage. Therefore, a method is adopted in which an electric wire is laid so as to bypass the construction site and electric power is bypassed by the electric wire during construction.

By the way, when the above-mentioned construction work spans a long distance, the bypass line must be long accordingly, but in such a case, the electric wire usually divided into appropriate lengths. To connect to the required length. Therefore, to facilitate the work of laying the bypass line, a plurality of drums around which the divided electric wires are wound are mounted on a work vehicle, and the drums located at a predetermined pull-out position while running the work vehicle from the bypass start point. It is possible to use a device that allows you to pull out an electric wire from a drum, and then draw out the electric wire by pulling out the electric wire from another drum to the withdrawal position after each drum is drawn out. is there.

As such a device, a plurality of drums are stored in the storage path, the rotation shafts of the drums are connected by a chain, and the chain is driven to store up to the loading / unloading position provided at the end of the storage path. It rolls on the floor of the road, and at its loading / unloading position, the drum is rotatably supported by two rollers arranged side by side on the floor,
The applicant of the present invention has proposed a device (cable drum loading / unloading device, see FIG. 4) configured so that it can be rotated at that position for both cable drawing. In this device, when the drum rolling on the floor surface moves over the rollers from the floor surface, the drum moves over the roller on the side close to the floor surface and abuts on the other roller as well. It is located in a stable position.

(Problems to be solved by the invention) By the way, the chain is endlessly stretched by a sprocket and driven, but in order to prevent the chain from coming off from the sprocket, the chain is always stretched in a straight line between the sprockets. Is desirable. For this reason, it is necessary to make the position (height from the floor) of the rotary shaft of the drum attached to the chain constant.

However, if the height of the roller is made equal to the height of the floor surface, the rolling moving drum can pass over the roller on the side closer to the floor surface while keeping the height substantially constant. The rollers and their drums abut each other at a position higher than the lowest point of the flange of the drum (that is, the drum is supported in a depressed form between the two rollers). ). For this reason, the height of the drum at that time, that is, the height of the rotating shaft is lower than the rotating shafts of the other drums located on the floor surface. Therefore, there is a problem that the chain is pulled down by the lowered rotating shaft and an extra load is applied.

On the other hand, if the roller is set higher than the floor so that the height of the rotary shaft of the drum mounted on the roller is equal to that of the other drums, the drum moves on the roller closer to the floor. Therefore, there is a problem that the chain is pulled up by the rotating shaft of the drum and easily disengages from the sprocket.

In addition to the above problems, there are also the following problems when the cable is pulled out. The drum supported on the rollers rotates with the operator's cable drawer. However, depending on the pulling speed, the drum may rotate due to its inertia prior to the cable pulling, and the cable may be unwound further, resulting in poor workability.

In view of the above problems, it is an object of the present invention to provide a cable drawing drum supporting device in which movement of a drum onto a roller and drawing of a cable are performed smoothly.

B. Configuration of the Invention (Means for Solving the Problems) In order to achieve the above object, in the cable pull-out drum support mechanism of the present invention, two rollers that rotatably support the drum at the loading / unloading position are connected to the swing member. Install on both ends. Further, a braking mechanism is attached so that the rotation of the drum is braked when the cable is pulled out from the drum positioned on the two rollers.

(Operation) In such a cable pull-out drum support mechanism, when the drum rolls on the floor of the storage path and comes into contact with a roller on the side close to the floor, the height of the roller depends on the weight of the drum. Is pushed down to almost match. Therefore, the drum smoothly passes over the roller while keeping the height constant. Further, thereafter, the drum also abuts on the other roller, so that the connecting rocking member holding these rollers returns to their original positions, and the two rollers become horizontal again. Placed. Further, when the cable is pulled out from the drum positioned on the roller in this way, a predetermined braking is applied to the drum by the braking means so that the drum does not excessively rotate due to inertia.

(Embodiment) Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.

First, a bypass vehicle including a drum loading / unloading device using a cable pulling drum supporting mechanism according to the present invention
It will be described with reference to the drawings.

The drum loading / unloading device 3 is mounted on the vehicle body 2 of the bypass vehicle 1 in the front-rear direction. The storage path 4 has a box shape in which a portion corresponding to the rear end of the vehicle body 2 is open. Inside the storage path 4, five drums around which the cable 5 is wound (hereinafter, from the right side of the drawing, the first drum to the fifth drum (D1 to D
5)) are placed side by side in parallel, and the second drum D2
The fifth drum D5 is stored in each predetermined storage position (P2 to P5) so that it can roll freely. Further, the flange portion of the first drum D1 is held by the roller mechanism RM that constitutes the above-mentioned cable drawing drum support mechanism. The roller mechanism 6
The position where is arranged is referred to as a carry-in / carry-out position PE, and the drum (D1 to D5) is carried in and carried out from here through the opening. Further, a braking mechanism BM which constitutes a drum supporting mechanism according to the present invention is attached above the loading / unloading position.

Two chains 7 are held on both sides in the storage path 4 in parallel in a direction connecting the loading / unloading position PE and the respective predetermined storage positions (P2 to P5) with both ends thereof being held by sprockets (8, 9). (Only the front chain is shown in the figure). A motor M is attached to the innermost portion of the storage passage 4, and a sprocket 9 arranged on the inner side of the storage passage 4 is attached to the output shaft of the motor M. Also, 2
Five pairs of brackets (B1 to B5) are attached to the chain 7 at opposite positions at predetermined intervals. The rotation shafts of the first drum D1 to the fifth drum D5 are rotatably held by the first bracket B1 to the fifth bracket B5, respectively. The brackets (B1 to B5) are composed of a fixing member Ba fixed on the chain 7 and an opening / closing member Bc openably and closably attached to the fixing member Ba by a hinge Bb, as shown in FIG. By rotating the opening / closing member Bc, the rotating shafts of the drums (D1 to D5) are detachable.

A drum loading / unloading gate 10 is provided at the rear end of the vehicle body 2.
Further, a crane device 11 for lifting distribution equipment and the like is provided at the front of the vehicle body 2.

Next, the roller mechanism RM will be described with reference to FIG.

The roller mechanism RM is composed of two rollers 21, 22, a connecting rocking member 23 and a rubber spring (equalizer means) 24. As shown in FIG. 2, the rollers 21 and 22 are arranged in parallel, and both ends of their rotation shafts are rotatably held by a pair of connecting rocking members 23. The two connecting rocking members 23 are connected by a push-down plate 25. Further, the connecting rocking member 23 has a direction in which the rollers 21 and 22 are orthogonal to the drum loading / unloading direction with respect to the stand member 26 attached to the bottom surface of the recess provided in the loading / unloading position PE and connected to the floor surface 4a. Is pivoted so that The pivotal position (swing shaft) of the connecting rocking member 23 is equidistant from the mounting position of the rotary shafts of the rollers 21 and 22.
23 swings like a seesaw around the pivot position. Therefore, the rollers 21 and 22 also move up and down alternately. However, the swing is restricted by a stopper (not shown) so that the rollers 21 and 22 do not become lower than the floor surface 4a.

By the way, when the rollers 21 and 22 are at the same height as the floor surface 4a, the drums (D1 to D5) (hereinafter, simply referred to as the drum D for convenience) can be smoothly moved onto the rollers 21 and 22. Since there is a predetermined gap between the rollers 21 and 22, the drum D is supported as if it falls between the rollers 21 and 22. Therefore, the height of the drum D, that is, the height of the rotating shaft is lower than that of the other drums. Therefore, the area around the bracket B1 of the chain 7 is pushed down,
Extra load is applied to the chain 7. Therefore, the roller
In order to align the height of the drum D placed on 21, 21 with the other drums and to stretch the chain 7 straight, the roller 2
1 and 22 are higher than the floor surface 4a.

The rubber spring 24 is sandwiched between the push-down plate 25 and the bottom surface of the recess. Of the two rollers 21, 22, the roller 21 on the side closer to the floor surface 4a is called the first roller, and the other roller 22 is called the second roller.

Next, the configuration of the braking mechanism BM will be described.

The braking mechanism BM includes an arm 31 and a spring 32. A rotary member 33 that comes into contact with the flange of the drum D is rotatably attached to the tip of the arm 31, and the base end of the rotary member 33 is pivotally mounted on the ceiling surface of the storage path 4. A spring 32 is attached between the intermediate portion of the arm 31 and the ceiling surface of the storage path, and the arm 33 and the rotating member 33 are urged downward by the spring 32.

Next, the operation of the cable support drum support mechanism will be described.

First, a case will be described in which the cable 5 is pulled out from the drum D located at the carry-in / out position PE as shown in FIG. 1 and placed on the roller mechanism RM.

When the cable 5 is pulled out, the drum D rotates while being supported by the rollers 21 and 22 along with the pulling out. At this time, the rotating member 33 of the braking mechanism BM contacts the flange portion of the drum D, and the drum D is pressed against the rollers 21 and 22 by the urging force of the spring 32. Therefore, resistance is generated to the rotation of the drum D, and a predetermined braking force acts on the drum D. In addition, by this braking force,
It prevents the drum D from rotating due to inertia prior to the cable pull out.

Next, the operation of the roller mechanism RM will be described.

As described above, when the cable 5 has been pulled out, the drum D that has become empty is removed from the bracket (B1 or the like) and carried out. Next, the chain 7 is driven to roll and move the next drum D on the floor surface 4a toward the predetermined storage position (P2, etc.) toward the predetermined storage position PE. This is shown in 3a-3c
It is a figure. As shown in Fig. 3a, the drum D is still in the loading / unloading position PE.
When separated from, the rollers 21 and 22 are horizontally positioned by the rubber spring 24. When the drum D approaches the loading / unloading position PE and the flange portion of the drum D contacts the first roller 21 as shown in FIG. 3b, the first roller 21 is pushed down by the weight of the drum D. Thus, the drum D is on the floor
When moving away from the 4a and moving onto the first roller 21, the rotating surface of the first roller 21 becomes almost at the same height as the floor surface 4a (the further stopper prevents further lowering), so that the drum D can pass over the first roller 21 while keeping the height of its rotating shaft constant. At this time,
Contrary to the first roller 21, the second roller 22 is higher than the original horizontal position. At this time, the connecting rocking member
Since 23 is tilted, the rubber spring 24 is deformed by being pushed by the pushing down plate 25 which is tilted accordingly. Due to the deformation of the rubber spring 24, a force for returning the connecting swing member 23 to the original position is urged. Thus, as the drum D approaches the second roller, the first roller 21 rises, and when the drum D is located at the loading / unloading position PE, the first roller 21 and the first roller 21 which have returned to the horizontal position again as shown in FIG. 3c. The drum D is rotatably mounted on the second roller 22.

In addition, in this example, even when the drum D is loaded and unloaded, the second
Since the roller 22 is pushed down so as to be almost at the same height as the floor surface 4a, smooth loading and unloading can be performed.

C. Effect of the Invention As described above, when the drum support mechanism for cable pull-out is used, the roller that rotatably supports the drum at the carry-in / out position, that is, the cable pull-out position rolls on the floor surface of the storage path. It is pushed down by the collar part of and becomes almost the same height as the floor of the storage path. Therefore, the drum is smoothly placed on the roller without changing the height of the rotating shaft. Therefore, the chain can always be kept in a straight state and no extra load is applied.

Further, when the cable is pulled out from the drum placed on the roller in this manner, the drum is constantly braked by the braking mechanism so as not to rotate due to inertia, so that the cable can be pulled out efficiently.

[Brief description of drawings]

FIG. 1 is a side view showing a cable pull-out drum support mechanism according to the present invention, FIG. 2 is a plan view showing a roller mechanism that constitutes the cable pull-out drum support mechanism, and FIG. FIG. 4 is a conceptual view showing the operation of the roller mechanism, and FIG. 4 is a side view showing a bypass vehicle provided with the cable drawing drum supporting mechanism. 4 …… Storing path, 7 …… Chain 21 …… First roller, 22 …… Second roller 24 …… Rubber springs D, D1 to D5 …… Drum PE …… Loading / unloading position, BM …… Brake mechanism

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Yuichi Yoshizawa Inventor Yuichi Yoshizawa 10-2, 1152 Yamashita, Ryoke, Ageo City, Saitama Prefecture Aichi Vehicle Co., Ltd. Ageo Plant (72) Takashi Hasegawa 1152 Yamashita, Ageo-shi, Saitama Prefecture No. 10 Aichi Vehicle Co., Ltd. Ageo Factory

Claims (2)

[Scope of utility model registration request] 1. A storage path for storing a cable winding drum so that the drum can be freely rolled, and is stretched in a direction connecting a loading / unloading position of the drum provided in the storage path and a predetermined storage position of the drum. A cable pull-out drum supporting mechanism provided in a cable drum loading / unloading device that rolls the drum detachably disposed on the chain between the loading / unloading position and the predetermined storage position by driving the chain. There, catch the drum that has been rolling on the floor,
Two rollers arranged in parallel with each other to rotatably support the drum by abutting on the flange portion of the drum, and holding the rollers at both ends, respectively, and centering on a swing shaft between the two rollers. And a connecting swing member capable of swinging in a direction in which the two rollers are alternately moved up and down. 2. A braking mechanism for braking the rotation of the drum when the cable is pulled out from the drum mounted on the two rollers. The cable support drum support mechanism described.