Cable reel transfer trolley

Abstract

The invention relates to a transport cart comprising adjustable, foldable, attachable, detachable or convertible components, in particular to a cable reel transfer cart. The cable reel transfer trolley comprises a chassis, the front end of the chassis is connected with a pulling mechanism, the pulling mechanism comprises a left chassis connecting rod and a right chassis connecting rod which are hinged to the left side and the right side of the chassis, the left chassis connecting rod and the right chassis connecting rod are correspondingly hinged to a left cable reel pulling rod and a right cable reel pulling rod, and the rear ends of the left cable reel pulling rod and the right cable reel pulling rod are provided with hanging lugs used for being matched with center holes of cable reels in an inserting and hanging mode. The left chassis connecting rod, the right chassis connecting rod, the left cable reel pulling rod and the right cable reel pulling rod correspondingly form a folding arm in a vertical plane, the folding arm can be folded under the traction effect of winding equipment, the folding arm can be connected with a cable reel behind the tail end of the chassis through a hanging lug when unfolded, and the cable reel connected with the hanging lug can be pulled to the chassis when the folding arm is folded. According to the cable reel transfer trolley, the effects of simplifying the structure of the cable reel transfer trolley and reducing the failure rate can be achieved.

Description

Technical Field

[0001] The present invention relates to the field of transport vehicles comprising adjustable, foldable, attachable, detachable or convertible components, and in particular to a cable drum transport trolley. Background Art

[0002] After civil construction of highways, railways, and their tunnels is completed, pipelines, cables, and other conduit facilities need to be laid on one or both sides. These pipelines are stored in a coiled form on cable drums. During installation, the cable drums with the pipelines are placed on a cable-laying vehicle, which is then lifted off the ground by a support device. The cable is then unwound using a tractor on the cable-laying vehicle, and the unwound cable is laid to the appropriate location as the vehicle moves. Because pipeline installations often span long distances, a single construction project often requires a large number of cable drums. Multiple cable drums are stored on a transport vehicle (connected to the cable-laying vehicle). During the installation process, when a reel is used up, the remaining unused reel must be transported to the support device. This process involves transferring the reels. Cable drums are generally heavy, so transferring the reels from the transport vehicle to the appropriate support device requires the use of a cable drum transfer vehicle.

[0003] The patent specification with authorization announcement number CN221273090U and authorization announcement date July 5, 2024 discloses a cable reel transfer device, which includes a base plate, a vertical track is provided at one end of the base plate, a push rod is installed on one side of the vertical track, and a horizontal telescopic rod is installed on the other side. The push rod is used for people to hold and move the base plate. The position of the horizontal telescopic rod on the vertical track is adjustable. The other end is connected to a connecting shaft, which is used to be inserted into the center hole of the cable reel to cooperate with the cable reel hook. A vertical telescopic rod is also provided on the base plate, and the upper end of the vertical telescopic rod supports the horizontal telescopic rod. When in use, the connecting shaft can be hung in the center hole of the cable reel by extending the horizontal telescopic rod and adjusting the vertical telescopic rod, and then the cable reel can be pulled to the base plate by retracting the horizontal telescopic rod and extending the vertical telescopic rod. Finally, the cable reel is transferred by holding the push rod.

[0004] The aforementioned cable reel transfer equipment can automatically load cable reels onto the vehicle and, once loaded, position the reels during operation to prevent them from rolling. However, since this functionality requires horizontal and vertical telescopic rods, it presents a complex structure and a high failure rate. Furthermore, cable reels vary in length in actual projects, and the aforementioned equipment, with its fixed width, is difficult to adapt to these varying lengths. Summary of the Invention

[0005] The object of the present invention is to provide a cable reel transfer trolley to solve the problems of complex structure and high failure rate of the existing cable reel transfer trolley due to the need to use horizontal telescopic rods and vertical telescopic rods to install the cable reel.

[0006] The cable reel transfer trolley of the present invention adopts the following technical scheme: the cable reel transfer trolley comprises a chassis for supporting the cable reel, and a towing mechanism is connected to the front end of the chassis, and the towing mechanism comprises left and right chassis connecting rods which are spaced apart on the left and right sides of the chassis and hinged to the chassis, and left and right cable reel towing rods are correspondingly hinged on the left and right chassis connecting rods, and the rear ends of the left and right cable reel towing rods are provided with hanging ears for plugging and hanging with the center holes of the cable reels, and a connecting structure for connecting to the hoisting equipment is provided on the left and right cable reel towing rods and / or the left and right chassis connecting rods, and the left and right chassis connecting rods correspond to form folding arms in a vertical plane, and the folding arms can be folded under the pulling action of the hoisting equipment, and can be connected to the cable reel behind the tail end of the chassis through the hanging ears when the folding arms are unfolded, and the cable reel connected to the hanging ears can be dragged onto the chassis when the folding arms are folded.

[0007] Furthermore, the connecting structure is connected to the hinge points of the left and right chassis connecting rods and the left and right cable drum towing rods.

[0008] Furthermore, the chassis includes left and right supporting plates arranged at intervals on the left and right sides and corresponding to the left and right annular baffles of the cable drum. A telescopic adjustment rod is connected between the left and right chassis connecting rods, and the distance between the left and right supporting plates can be adjusted by the telescopic adjustment rod. The connecting structure includes two connecting rods respectively connected to the two ends of the telescopic adjustment rod, and the other ends of the two connecting rods are hinged to form an "eight" shape.

[0009] Furthermore, a hoisting device connector for connecting a hoisting device is provided at the hinged position between the two connecting rods.

[0010] Furthermore, the left end of the telescopic adjustment rod is connected to the hinge point of the left chassis connecting rod and the left cable drum towing rod, and the right end of the telescopic adjustment rod is connected to the hinge point of the right chassis connecting rod and the right cable drum towing rod.

[0011] Furthermore, the telescopic adjustment rod includes an outer sleeve and a core rod arranged in the outer sleeve, a long hole is provided on the outer sleeve, and a clamping screw is provided on the core rod. The clamping screw is located in the long hole and can clamp the outer sleeve.

[0012] Furthermore, the chassis is provided with a baffle limiting groove for axially limiting the annular baffle of the cable drum.

[0013] Furthermore, a baffle front limiting platform for limiting cooperation with the annular baffle of the cable drum is provided at the front end of the chassis.

[0014] Furthermore, a baffle rear limit platform for cooperating with the annular baffle of the cable drum is detachably provided at the rear end of the chassis, and more than two connection structures for connecting the baffle rear limit platform are provided on the chassis along the front-to-back direction.

[0015] Furthermore, the chassis is provided with running wheels or sliding shoes, and a ramp member for cooperating with the annular baffle of the cable drum is provided at the rear end of the chassis.

[0016] Beneficial Effects: The cable reel transfer trolley of the present invention is a pioneering invention. The cable reel transfer trolley is connected to the chassis by left and right chassis connecting rods, and the left and right cable reel towing rods are correspondingly hinged on the left and right chassis connecting rods. The rear ends of the left and right cable reel towing rods are provided with hanging ears for engaging with the center holes of the cable reels. The left and right chassis connecting rods and the left and right cable reel towing rods form folding arms in a vertical plane, and the folding arms can be folded under the pulling action of the hoisting device. When the folding arms are unfolded, their length is longer and they can be connected to the cable reel behind the rear end of the chassis through the hanging ears. When the folding arms are folded, the cable reel connected to the hanging ears can be dragged onto the chassis. During use, only the folding arms need to be unfolded to connect the left and right cable reel towing rods to the cable reel behind the rear end of the chassis. Then, the hoisting device drives the folding arms to fold to pull the cable reel onto the chassis. After the cable reel is limited, the hoisting device can continue to be used to transfer the cable reel through the cable reel transfer trolley. Since the cable reel can be loaded onto the vehicle using only the folding arm, the cable reel transfer trolley itself does not have a driving mechanism such as a telescopic cylinder, so there is naturally no need to configure supporting equipment such as a pump station on the vehicle. This can simplify the structure of the cable reel transfer trolley and reduce the failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional image of a cable drum; Figure 2 It is a three-dimensional diagram of the cable laying equipment; Figure 3 This is a three-dimensional diagram of an embodiment of a cable reel transfer trolley supporting a cable reel; Figure 4 yes Figure 3 A three-dimensional view of the cable drum transfer trolley; Figure 5 yes Figure 4 A three-dimensional view of the middle tray; Figure 6 yes Figure 4 A three-dimensional diagram of the middle towing mechanism; Figure 7 yes Figure 4 Bottom view of the middle towing mechanism; Figure 8 It is a structural schematic diagram of another embodiment of a cable reel transfer trolley.

[0018] In the figure: 1. pull ring; 2. connecting rod; 3. outer sleeve; 4. core rod; 5. chassis connecting rod; 6. cable drum towing rod; 7. support plate; 8. limit platform behind the baffle; 9. stop pin; 10. ramp; 11. hanging ear; 12. walking wheel; 13. supporting device; 14. traction machine; 15. cable drum; 1501. reel; 1502. annular baffle; 1503. reinforcement rib; 1504. cable reel; 16. stop pin; 17. sliding shoe. DETAILED DESCRIPTION

[0019] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0020] In order to realize the cable replenishment after the cable is laid in the tunnel, the cable drum 15 needs to be replaced. The typical structure of the cable drum 15 is as follows: Figure 1 As shown, it includes a reel 1501 for winding cables (pipes or cables) and annular baffles 1502 at both ends of the reel. Reinforcement ribs 1503 are provided on the outside of the annular baffle 1502. The reinforcement ribs 1503 are radially arranged on the outside of the annular baffle 1502, extending from the outer circumferential edge of the annular baffle 1502 to the center, and are connected to the cable reel 1504. The cable reel 1504 is a hollow shaft for connecting with cable laying equipment (such as Figure 2 when laying the cable drum 15, the cable drum 15 must be pulled into place by the trolley through the corresponding external traction device (winch) to cooperate with the support device 13 to achieve the replacement of the cable drum 15.

[0021] Cable reels 15 come in a variety of sizes, each with different diameters and lengths. Furthermore, they are heavy and, during transportation, are pressed against the surface of the transport equipment by the two annular baffles 1502, which can easily damage the transport equipment. Therefore, transferring the cable reel from the transport equipment to the corresponding location on the cable laying equipment is extremely inconvenient. If the cable reel 15 can be simultaneously secured and transported using appropriate transfer equipment, and the cable reel 15 can be directly dragged from the transport equipment to the corresponding location on the cable laying equipment, the above problems can be better addressed. Based on the above concept, the present invention proposes a technical solution for a cable reel transfer trolley.

[0022] Based on the above invention concept, the specific implementation of the cable drum transfer trolley is as follows: In order to support the cable reel 15, the cable reel transfer trolley is provided with a chassis, which includes two parallel pallets 7. The pallet 7 is a movable pallet for supporting the two annular baffles 1502. A positioning device is provided on the chassis to ensure that the cable reel 15 does not roll off the trolley during transportation of the cable reel transfer trolley; in order to facilitate the movement of the pallet 7 and the cable reel 15 supported by it, walking wheels 12 are provided under the pallet.

[0023] To tow the cable drum 15, the cable drum transport trolley is equipped with a towing mechanism. This towing mechanism is connected to the chassis via its chassis connecting rods 5. There are two chassis connecting rods 5, hinged to the left and right sides of the front end of the chassis, forming the left and right chassis connecting rods, respectively. The hinge axis extends in the left-right direction. A cable drum towing rod 6 is hinged to each of the left and right chassis connecting rods, forming the left and right cable drum towing rods, respectively. The hinge axis between the cable drum towing rod 6 and the corresponding chassis connecting rod 5 is parallel to the hinge axis of the chassis connecting rod 5 relative to the chassis, so that the chassis connecting rod 5 and the cable drum towing rod 6 together form a folding arm in a vertical plane. The hinge between the cable drum towing rod 6 and the chassis connecting rod 5 forms one joint of the folding arm, and the hinge between the chassis connecting rod 5 and the chassis forms the other joint of the folding arm, allowing the folding arm to expand, contract, and swing.

[0024] The ends of the cable drum hanging rods 6 are provided with hanging ears 11. Figure 4 In the state shown, when the cable drum towing rod 6 swings counterclockwise relative to the chassis connecting rod 5 on which it is located, and the chassis connecting rod 5 rotates clockwise relative to the chassis, the hanging ear 11 will move to the position behind the rear end of the chassis, and can cooperate with the cable drum to be transported behind the rear end of the chassis. The cable drum towing rod 6 is connected to the cable drum, and the chassis is locked or blocked in place. A forward pulling force is applied to the front end of the chassis connecting rod 5 or the cable drum towing rod 6, and the cable drum to be transported can be pulled onto the chassis to achieve the chassis loading. Then, the chassis is unlocked and the cable drum can be transported together with the towing rod.

[0025] When in use, first extend and swing the folding arm to insert the hanging ear 11 at the end of the cable reel towing rod 6 into the cable reel 1504, block the chassis and then pull the cable reel 15 through the external pulling device, so that the cable reel can be pulled onto the chassis. At this time, the hanging ear 11 continues to play the role of maintaining the position of the cable reel. After continuing to pull the trolley to the corresponding position of the support device 13 on the cable laying equipment, remove the towing mechanism, complete the clamping of the cable reel 15 by the support device 13, and then withdraw the pallet to complete the replenishment of the cable reel 15.

[0026] like Figure 3-5 As shown, in a preferred embodiment, the support plate 7 is provided with a walking wheel 12 and a ramp 10; the support plate 7 mainly includes a rectangular bottom plate and two side plates, the front ends of the two side plates have upward protrusions, and the rear ends of the protrusions have two parallel inner grooves. As the main supporting structure for supporting the cable drum 15, the support plate 7 needs to have a certain strength, so it is generally made of steel. Figure 5 In the embodiment shown, the support plates are formed by welding steel plates. In other embodiments, screws or rivets may also be used for connection.

[0027] like Figure 4-5 As shown, in order to prevent the cable reel 15 from rolling on the pallet 7, as a preferred embodiment, a stopping device is provided on the pallet 7, that is, the cable reel 15 is stopped by setting a front limit platform of the baffle and a rear limit platform of the baffle. The front limit platform of the baffle is connected between the front end protrusions of the two side plates of the pallet, and one side is connected to the bottom plate of the pallet. In order to improve the structural strength of the front limit platform of the baffle and to facilitate the removal of the cable reel 15 from the front end of the pallet 7, as a preferred embodiment, the front limit platform of the baffle is set to an inclined steel plate.

[0028] The above-mentioned baffle rear limit platform 8 is installed at the rear end of the support plate 7. The bottom surface of the baffle rear limit platform 8 is in contact with the bottom plate of the support plate 7. Vertical stop side plates are connected on both sides. There are multiple grooves at the corresponding positions on the rear sides of the two stop side plates, which correspond to the grooves in the rear sections of the two side plates of the support plate 7. They are used to pass the stop pin 9 to fix the baffle rear limit platform 8. An inclined inclined plate is welded between the two stop side plates to carry the annular baffle 1502, and together with the baffle front limit platform, the annular baffle 1502 is positioned on the support plate 7.

[0029] As a preferred embodiment, the baffle rear limit platform 8 is set to a detachable structure. When the annular baffle 1502 rolls into the pallet, the baffle rear limit platform 8 is removed, and the annular baffle 1502 rolls forward. After the annular baffle 1502 rolls into place, the baffle rear limit platform 8 is fixed to the pallet 7 through the stop pin 9 passing through the stop side plate groove and the inner groove of the rear section of the side plate of the support plate 7. Together with the baffle front limit platform, the cable drum 15 is positioned on the pallet 7. In other embodiments, a stop pin 16 (such as Figure 8 ), directly fix the annular baffle 1502, and the above methods can all achieve the stopping of the cable drum 15 on the supporting plate 7.

[0030] The purpose of providing the ramp 10 at the rear end of the support plate is to facilitate the cable drum 15 to roll onto the support plate 7. Figure 4 In the illustrated embodiment, the ramp member 10 is formed by welding steel plates, and includes a guide plate, two support plates, and a connecting plate. The guide plate is arranged obliquely at the rear end of the support plate 7, with one side connected to the bottom surface and the other side connected to the rear end of the support plate 7 through the connecting plate; a buckle is provided on the connecting plate and is connected to the corresponding card slot at the rear end of the support plate 7; in other embodiments, a guide block or a guide structure directly integrated on the support plate 7 can also be used to guide the cable reel 15.

[0031] like Figure 4-5As shown, in order to realize the movement of the support plate 7 and the cable drum 15 carried by it on the plane, this embodiment is provided with walking wheels 12 at the front and rear ends of the bottom plate of the support plate 7. The walking wheels 12 include rollers, which are installed under the bottom plate of the support plate 7 through a connecting seat, and one roller is arranged at the front end of the support plate 7 and two rollers are arranged at the rear end of the support plate 7; the walking wheels 12 have low movement resistance, excellent load-bearing capacity, and a smooth transportation process; since the cable drum 15 is often transported to the construction site by a transport flat car, the cable drum 15 is transported to the platform of the cable laying equipment for transportation between platforms. In other embodiments, a sliding shoe 17 (such as Figure 8 ) to achieve the sliding of the support plate 7, the sliding shoe 17 can be made of a material with a small surface friction coefficient, such as a polytetrafluoroethylene block or a copper block with a steel-plated surface. The above embodiments can achieve the sliding of the support plate 7 and the cable reel 15 it supports on the plane while taking into account the strength and wear resistance.

[0032] In order to realize the connection between the pallet and the towing mechanism, as a preferred embodiment, a connecting shaft is provided between the two side plates of the pallet 7, and the connecting shaft is correspondingly connected to one end of the chassis connecting rod 5, and the other end of the chassis connecting rod 5 is connected to the telescopic mechanism on the towing mechanism.

[0033] like Figure 6-7 As shown, in a preferred embodiment, the towing mechanism primarily comprises a telescopic adjustment rod, a cable drum towing rod 6, a connecting rod 2, and a pull ring 1. The telescopic adjustment rod comprises a core rod 4 and an outer sleeve 3. The outer sleeve 3 is a square steel tube with a hollow interior, connected to the core rod 4. The core rod 4 is slightly narrower than the sleeve and can extend into the outer sleeve 3, enabling relative movement in the fore-aft direction with the outer sleeve 3. The other side of the outer sleeve 3 from the core rod 4 forms a towing connection side, which is bolted to the lugs of the chassis connecting rod 5 and the cable drum towing rod 6. The towing connection side is also provided with a lug, which is connected to the connecting rod 2. The outer sleeve is provided with an elongated hole, and a clamping screw is provided on the core rod. The clamping screw is located in the elongated hole and compresses the outer sleeve. In other embodiments, the telescopic function can also be achieved by providing a hydraulic cylinder. The two connecting rods 2 form an eight-shaped structure that automatically adapts to changes in the length of the telescopic adjustment rod during its extension and retraction.

[0034] like Figure 6-7In the illustrated embodiment, two cable reel hanging rods 6 are provided, and the hanging ears 11 provided at the end of the cable reel hanging rods 6 mainly include a connecting shaft and an axis plate connected to the cable reel 1504, and the connecting shaft is used to pass through the cable reel to fix the cable reel 15; the axis plate is provided at the end of the connecting shaft, and a reinforcing plate is provided at the connection part with the cable reel hanging rod 6; the above-mentioned cable reel hanging rod 6 can move relative to each other in the front and rear directions with the telescopic mechanism to realize the opening and closing of the two cable reel hanging rods 6 in the front and rear directions, thereby adjusting the spacing between the hanging ears 11, so that the hanging ears 11 can pass through the cable reel 1504, and realize the positioning of the cable reel 15; as a specific embodiment, the two hanging ears 11 of the towing mechanism can adjust the spacing within the range of 1100-1400mm, and can adapt to cable reels 15 with diameters of φ=1600mm and φ=1800mm.

[0035] In order to realize the connection between the external traction device and the towing mechanism, such as Figure 6-7 In the illustrated embodiment, a pull ring 1 and two connecting rods 2 are provided to connect an external traction mechanism. One end of one connecting rod 2 is bolted to the upper ear seat on the traction connection side of the outer sleeve 3, and one end of the other pulling rod 2 is bolted to the upper ear seat on the traction connection side of the core rod 4. The other ends of the two connecting rods 2 are connected together by a connector. The other end of the connector is provided with a pull ring 1. The pull ring is made of iron and is connected to the external traction device when in use. When the external traction device is actuated, the pull ring 1 drives the connecting rod 2, thereby moving the traction support plate and the cable drum 15. The above-mentioned traction mechanism can ensure that the pull ring and the center line of the telescopic adjustment rod are aligned during traction, so that the traction force acts on the center line of the cable drum transfer trolley and the cable drum 15, thereby preventing the cable drum transfer trolley from deviating during traction.

[0036] Of course, in a specific embodiment, the connection position of the connecting rod can be set as needed. For example, it can be connected to the left and right cable drum towing rods and / or the left and right chassis connecting rods, among which connecting to the hinge point of the cable drum towing rod and the chassis connecting rod is the best way.

[0037] The external traction mechanism includes a winch (not shown in the figure), which is connected to the towing mechanism on the cable drum transfer trolley through a twisted rope. As a specific embodiment, the winch is located near the operating table of the cable laying equipment; as a specific embodiment, the above-mentioned winch has a rated traction load of 2t, and is connected to the pull ring on the above-mentioned cable drum transfer trolley through a twisted rope, and the twisted rope is 20m long.

[0038] The traction machine 14 is arranged on the right side of the support device 13 on the cable laying platform. Before traction of the cable drum 15, the height of the upper roller of the traction machine needs to be lowered so that it does not exceed the upper plane of the traction machine 14 to avoid interfering with the movement of the cable drum.

[0039] After the preparation work is completed, the winch is used to pull the twisted rope to drive the cable reel transfer trolley from the transport device to the cable laying equipment. When the cable reel 15 is pulled into place, the towing mechanism is removed and the cable reel 15 is clamped by the support device 13. After the cable reel 15 is fixed, the pallet is withdrawn. Repeat this three times to complete the replenishment of cables on the cable laying equipment.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. Cable reel transfer trolley, characterized by: The folding arm can be folded under the pulling action of the hoisting device, and can be connected to the cable drum behind the rear end of the chassis through the hanging ear when the folding arm is unfolded, and the cable drum connected to the hanging ear can be dragged onto the chassis when the folding arm is folded.

2. The cable reel transfer trolley according to claim 1, characterized in that: The connecting structure is connected to the hinge points of the left and right chassis connecting rods and the left and right cable drum towing rods.

3. The cable drum transfer trolley according to claim 1 or 2, characterized in that: The chassis includes left and right supporting plates arranged at intervals on the left and right and corresponding to the left and right annular baffles of the cable drum. A telescopic adjustment rod is connected between the left and right chassis connecting rods, and the distance between the left and right supporting plates can be adjusted by the telescopic adjustment rod. The connecting structure includes two connecting rods respectively connected to the two ends of the telescopic adjustment rod, and the other ends of the two connecting rods are hinged to form an "eight" shape.

4. The cable reel transfer trolley according to claim 3, characterized in that: A hoisting device connector for connecting a hoisting device is provided at a hinged position between the two connecting rods.

5. The cable drum transfer trolley according to claim 3, characterized in that: The left end of the telescopic adjustment rod is connected to the hinge point of the left chassis connecting rod and the left cable drum towing rod, and the right end of the telescopic adjustment rod is connected to the hinge point of the right chassis connecting rod and the right cable drum towing rod.

6. The cable drum transfer trolley according to claim 3, characterized in that: The telescopic adjustment rod comprises an outer sleeve and a core rod arranged in the outer sleeve. A long hole is arranged on the outer sleeve, and a clamping screw is arranged on the core rod. The clamping screw is located in the long hole and can clamp the outer sleeve.

7. The cable reel transfer trolley according to claim 1 or 2, characterized in that: The chassis is provided with a baffle limiting groove for limiting the annular baffle of the cable drum in the axial direction.

8. The cable drum transfer trolley according to claim 1 or 2, characterized in that: A baffle front limiting platform for limiting cooperation with the annular baffle of the cable drum is provided at the front end of the chassis.

9. The cable drum transfer trolley according to claim 1 or 2, characterized in that: A baffle rear limit platform for cooperating with the annular baffle of the cable drum is detachably provided at the rear end of the chassis, and more than two connection structures for connecting the baffle rear limit platform are provided on the chassis along the front-to-back direction.

10. The cable drum transfer trolley according to claim 1 or 2, characterized in that: The chassis is provided with walking wheels or sliding shoes, and the rear end of the chassis is provided with a ramp member for cooperating with the annular baffle of the cable drum.

Images