JPH0549762U - Cable drum support device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cable drum supporting device capable of preventing the occurrence of a situation in which, when the cable drum is detached from the swing arm, the cable drum jumps out far away in the fall direction. .. In the cable drum supporting device, when the swing arm 13 is located on the laid side by a predetermined angle or more from the upright state N, the rotary shaft Ds of the cable drum supported by the shaft attaching / detaching mechanism 15 is detached from the shaft attaching / detaching mechanism 15. It is configured to include a disengagement prevention mechanism 1 for preventing the above.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cable drum supporting device that supports a cable drum when feeding a cable from the cable drum.

[0002]

[Prior Art]

 When carrying out the work of feeding the cable from the cable drum, for example, a cable feeding work vehicle (cable support device) 40 as shown in FIG. 4 is used. The cable feeding work vehicle 40 is provided with a swing arm 43 that can be swung up and down in the front-back direction of the vehicle body 41. The swing shaft 43 of the cable drum D is detachably attached to the swing arm 43. A shaft attaching / detaching mechanism 45 for supporting is attached.

The shaft attachment / detachment mechanism 45 is provided with a shaft receiver 45 a attached to an intermediate portion of the swing arm 43 so as to be rotatable in the front-rear direction of the vehicle body 41, and locks or unlocks the rotation of the shaft receiver 45 a. It is composed of an attachment / detachment operation lever 45b for detaching. The shaft receiver 45a has a concave portion, and receives and supports the rotary shaft Ds with the concave portion opened upward. Further, by rotating the recess so as to open toward the rear of the vehicle body 41, the rotary shaft Ds can be received in the recess from the rear of the vehicle body 41 or separated from the rear. The rotary shaft Ds of the cable drum D is suspended from the tip of the swing arm 43 by a suspending member 47 such as a chain attached to the tip of the swing arm 43.

Accordingly, when the cable drum D is unloaded from the swing arm 43, for example, when the swing arm 43 is in a substantially upright state, the detachable operation lever 45b is operated to unlock the rotation of the shaft receiver 45a. Then, the swing arm 43 may be operated to fall down. The rotating shaft Ds separates from the shaft receiver 45a while rotating the shaft receiver 45a due to the weight of the cable drum D as it falls.

[0005]

[Problems to be solved by the device]

 However, in such a cable feeding work vehicle 40, when the rotation lock of the shaft receiver 45a is released with the swing arm 43 lying down to the rear of the vehicle body 41 fairly deeply, the cable drum D separated from the shaft receiver 45a moves rearward. There is a problem that there is a possibility that it will pop out significantly (the state shown in A in FIG. 4). This is not preferable in terms of work safety.

The present invention has been made in view of such a problem, and when the cable drum is disengaged from the swing arm, it is possible to prevent the cable drum from jumping far away in the fall direction. It is an object of the present invention to provide a cable drum supporting device which is adapted to the above.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the cable drum supporting device of the present invention has a structure in which a rotating shaft supported by a shaft attaching / detaching mechanism is detached from the shaft attaching / detaching mechanism when the swing arm is located on the laid side by a predetermined angle or more from the upright state. It is configured with a disengagement prevention mechanism that prevents the movement.

[0008]

[Action]

 In such a cable drum supporting device, only when the swing arm is substantially upright, the disengaging operation (for example, release of the rotation lock of the shaft receiving member) in the shaft attaching / detaching mechanism is allowed, and the swing arm is further extended. When the is lying down, it prevents the detachment operation and prevents the cable drum from jumping out.

[0009]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, FIGS. 1 and 2 show a cable feeding work vehicle (cable drum supporting device) 10 according to the present invention. A pair of swing arms 13 and 14, which are separately arranged in the vehicle width direction, are pivotally attached to a rear portion of a vehicle body 11 of the cable feeding work vehicle 10 so as to be capable of undulating and swinging in the front-back direction of the vehicle body 11. The swing-arms 13 and 14 are connected at their proximal end pivotal portions to each other, and the swinging arms 13 on both sides of the swing arm 14 are expanded and contracted by a hydraulic undulation cylinder 16 mounted between the swing arm 14 and the vehicle body 11. , 14, the undulating operation is performed.

A shaft attaching / detaching mechanism 15 is provided on the inner side surface of each swing arm 13, 14. Hereinafter, the shaft attachment / detachment mechanism 15 provided on the swing arm 13 on the left side of the vehicle body will be described in detail with reference to FIG. The shaft attachment / detachment mechanism 15 includes a shaft receiver 51 attached to an intermediate portion of a swing arm 51, an attachment / detachment operation lever 52 provided near the base end portion of the swing arm 13, and the shaft receiver 51 and the attachment / detachment operation lever 52. It is composed of a lock link 54 provided therebetween.

The shaft receiver 51 is attached to the swing arm 51 so as to be capable of undulating and rotating in the left-right direction (the front-rear direction of the vehicle body 11) in the drawing around the pivot pin 51a. In the shaft receiver 51, a recess 51b capable of receiving the rotary shaft Ds of the cable drum D 1 is formed on one side of the pivot pin 51a, and a notch 51c is formed on the other side. The shaft receiver 51 receives and supports the rotary shaft Ds at a position where the recess 51b is opened toward the tip of the swing arm 51 (position B in the figure: hereinafter referred to as a receiving position). In addition, the rotary shaft Ds may be received from the rear of the vehicle body 11 or separated from the rear at a position where the recess 51b is opened toward the falling direction of the swing arm 51 (position C in the figure: hereinafter referred to as open position). You can

The rotating shaft Ds is held at the lower end of the suspension member 17 attached to the tip of the swing arm 13 and is hung from the tip of the swing arm 13.

The attachment / detachment operation lever 52 is pivotally attached to the swing arm 13 so as to be vertically swingable, and is also biased to swing upward by a spring 53 attached between the swing arm 13 and the swing arm 13. ..

The lock link 54 includes a lock lever 55. The lock lever 55 is attached below the shaft receiver 51 so as to be vertically swingable. A convex portion 55a protruding upward is formed at an intermediate portion in the longitudinal direction of the lock lever 55, and the convex portion 55a is formed on the shaft receiver 51 located at the receiving position as the lock lever 55 moves up and down. It disengages with respect to the formed notch 51c. The tip end of the lock lever 55 is connected to a longitudinal intermediate portion of the attachment / detachment lever 52 via a connecting rod 56.

In the shaft attaching / detaching mechanism 15 configured as described above, when the attaching / detaching operation lever 52 is not operated, the biasing force of the spring 53 acts on the lock lever 55 via the connecting rod 56, and the lock lever 55 is lifted. To move. Therefore, the shaft receiver 51 located at the receiving position is locked and held at the receiving position by the engagement between the protrusion 55a of the lock lever 55 and the notch 51c of the shaft receiver 51, and is prevented from rotating to the open position. To be done. Therefore, the rotary shaft Ds received and supported by the shaft receiver 51 is not separated from the swing arm 13 regardless of the fall motion of the swing arm 13.

When the attachment / detachment operation lever 52 is operated downward against the urging force of the spring 53 (hereinafter referred to as “release operation”), the lock lever 55 is moved downward via the connecting rod 56. Therefore, the projection 55a of the lock lever 55 is released from the notch 51c of the shaft receiver 51 located at the receiving position, the lock holding state is released, and the shaft receiver 51 rotates to the open position, that is, Is allowed to disengage the rotating shaft Ds. Therefore, for example, if the swing arm 13 is in the upright position (position N in the figure) and the detachable operation lever 52 is operated to lay down the swing arm 13 as it is, it is received and supported by the shaft receiver 51. The rotating shaft Ds separates from the rotating shaft Ds by rotating the shaft receiver 51 to the open position due to the weight of the cable drum D.

However, if such a detaching operation is performed with the swing arm 13 lying down to some extent, the rotating shaft Ds (cable drum D) will fly out rearward, so that the detachment preventing mechanism 1 is provided. There is. As shown in FIG. 3, the detachment prevention mechanism 1 includes a cam member 2 attached near a pivot portion of a swing arm 13 in a vehicle body 11, and a stopper 3 arranged near the side of the cam member 2 from above. It consists of and.

The cam member 2 has a cam surface 2 a that faces the rear of the vehicle body 11 and is formed in a circumferential shape that is continuous in the vertical direction. However, the upper portion of the cam surface 2a is horizontally cut (hereinafter, this portion is referred to as a cut surface 2b).

The stopper 3 is a screw-shaped member extending in the longitudinal direction of the swing arm 13. Here, a stopper support rod 5 is attached between the intermediate portion of the attachment / detachment operation lever 52 and the axial link 4 which is attached rotatably around the base end pivot axis of the swing arm 13, and the stopper 3 is attached. Is supported at the intermediate portion of the stopper support rod 5. By rotating the stopper 3 with respect to the stopper support rod 5, the support height of the stopper 3 with respect to the cam member 2 can be adjusted.

In the disengagement prevention mechanism 1 configured as described above, as the swing arm 13 falls down from the upright position N 1, the stopper 3 moves above the cut surface 2b and then follows the cam surface 2a. Moving. Here, the maximum fall position of the swing arm 13 where the stopper 3 is located above the cut surface 2b is referred to as the maximum disengagement allowable position P, but the angle θ between the upright position N and the maximum disengagement allowable position P (claim The "predetermined angle") is set to a small angle of, for example, about 10 to 15 degrees by adjusting the support height of the stopper 3.

When the swing arm 13 is located between the upright position N and the maximum disengagement allowable position P, when the detachable operation lever 52 is operated to be detached, the stopper 3 sufficiently moves down above the cut surface 2b. .. Therefore, the detaching operation of the attachment / detachment operation lever 52 is not blocked at all, and the detachment of the rotary shaft Ds (cable drum D) from the shaft receiver 51 is also permitted. Even when the swing arm 13 is positioned at the maximum disengagement allowable position P and the disengagement operation is performed, and the rotary shaft Ds is disengaged from the shaft receiver 51, the cable drum D does not largely protrude rearward.

On the other hand, when the swing arm 13 has fallen over the maximum disengagement allowable position P, the stopper 3 immediately contacts the cam surface 2a even if the dismounting operation lever 52 is disengaged. The detachment operation is blocked. As a result, the shaft receiver 51 is locked in the receiving position, and the disengagement of the rotary shaft Ds from the shaft receiver 51 is prevented. Therefore, a situation in which the cable drum D pops out to the rear greatly is prevented and work safety is ensured.

[0023]

[Effect of the device]

 As described above, by using the cable drum support device of the present invention, it is possible to prevent the cable drum from being detached from the shaft attaching / detaching mechanism when the swing arm falls from the upright state by a predetermined angle or more. For this reason, it is possible to prevent the situation in which the cable drum supported by the swing arm in the fallen state as described above jumps out in the direction in which the swing arm falls down, and ensures work safety. You can

[Brief description of drawings]

FIG. 1 is a side view of a cable feeding work vehicle that is a cable support device according to the present invention.

FIG. 2 is a plan view of the cable feeding work vehicle.

FIG. 3 is a side perspective view showing a shaft attachment / detachment mechanism and a detachment prevention mechanism in the cable feeding work vehicle.

FIG. 4 is a side view of a conventional cable feeding work vehicle.

[Explanation of symbols]

 1 Detachment prevention mechanism 2 Cam member 3 Stopper 13, 14, 43 Swing arm 15, 45 Shaft attachment / detachment mechanism 51, 45a Shaft receiver 52, 45b Attachment / detachment operation lever D Cable drum Ds Rotation shaft

Front page continuation (72) Inventor Akio Sato 10, 1152 Yamashita, Ryoke, Ageo City, Saitama Prefecture Aichi Vehicle Co., Ltd.Ageo Plant (72) Inventor Shigeaki Tokumoto 1010, 1152 Yamashita, Ageo City, Saitama Prefecture Aichi Vehicle Co., Ltd. Ageo Factory

Claims (1)

[Scope of utility model registration request] 1. A cable drum supporting device comprising a swing arm capable of undulating and swinging, and a shaft attaching / detaching mechanism attached to the swing arm to detachably support a rotating shaft of a cable drum, wherein the swing arm comprises A cable drum comprising a separation prevention mechanism for preventing the rotation shaft supported by the shaft attachment / detachment mechanism from being detached from the shaft attachment / detachment mechanism when the rotation shaft is located on the lying side by a predetermined angle or more from the upright state. Support device.