JPH0535131Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to an installation device for aluminum cable covers that cover cables used in cable-stayed bridges, etc., and joint covers that cover between cable covers. .

(Prior Art) Cables formed of prestressed steel strands are covered with cable covers to protect the cables and to bind the bundles of prestressed steel strands into a hexagonal array during cable installation. This aluminum cable cover (including the joint cover) is attached by fitting two semicircular members together, and has concave and convex fitting parts at both ends of the semicircle. Covering is performed using the resultant force.

By the way, in a conventional device for covering a cable with this cable cover, a metal holder is attached to the inside of a metal container frame which firmly holds the cylinder of a hydraulic jack, and to the tip of the jack rod, facing each other.

(Problem to be solved by the invention) Since all of the above-mentioned conventional devices are made of metal,
It is heavy and difficult to handle, and the holder that comes into contact with the cover is made of metal, so it is easy to damage the cover.If the center of the upper and lower holders is misaligned, you will have to glue the cover together while the holder is misaligned. This has problems such as deformation of the cover.

The present invention was developed in view of these problems with the conventional technology, and its purpose is to make it easy to handle, prevent damage to the cover, and prevent misalignment of the upper and lower holders. It is an object of the present invention to provide a device that can be stably mounted by automatically aligning the center even when the vehicle is in use.

(Means for Solving the Problems) In order to achieve the above object, the cable cover mounting device of the present invention is such that a flexible belt is attached to the frame fixedly held on the cylinder of the hydraulic jack, and the U-shaped Upper and lower holders made of synthetic resin are detachably attached to the inside of the belt and to the tip of the jack rod.

The above-mentioned holders each have a semicircular recess formed on their opposing inner surfaces, and if the aluminum cover has a concave or convex protruding step on the outer circumferential surface, the edge of the holder is engaged with the protruding step. Then perform the fitting operation.
Further, when the aluminum cover has a perfect circular shape without a protruding step on the outer circumferential surface, the ends of the holders are not aligned on the same line but staggered in order to ensure stability of fitting. Furthermore, the lower holder attached to the inside of the belt is attached so as to be movable along the longitudinal direction of the belt.

The means for supplying oil to the hydraulic jack may be manual, foot-operated, electric pump, or the like.

(Function) According to the above means, the jack rod is pushed out by the operation of the hydraulic jack, and the upper holder moves forward, and at the same time, the lower holder attached to the belt is drawn toward the upper holder by the reaction force, and the lower holder is moved inside the upper and lower holders. The two covers are joined together, and the two halves of the cover are integrated.

The lower holder is attached to the flexible belt so that it can move in the longitudinal direction of the belt, so if there is a misalignment with the upper holder, it will automatically move and align itself. It will be worn.

(Embodiment) Hereinafter, an embodiment of the present invention will be described based on the drawings. In the figure, 1 is a hydraulic jack, and a container frame 2 is connected and fixed to the cylinder 1a of the hydraulic jack 1 with bolts 3. A flexible belt 4 is attached to the tip of the jack rod 1b of the jack 1 and the apparatus frame 2 in a substantially U-shape across the jack rod 1b.
Upper and lower holders 5 and 6 made of synthetic resin are attached to the inside of the holder, facing each other.

The container frame 2 fixed to the hydraulic jack 1 consists of a block 2a having a rectangular cylindrical shape screwed onto the outer periphery of the cylinder 1a, and flat metal plates 2b joined to both sides of the block 2a. The plates 2b arranged to sandwich the block 1 are fixed to the block 2a with bolts 3, and a collar 7 and a tie rod 8 are installed across the left and right plates 2b.

In addition, the left and right plates 2b constituting the container frame 2
Pins 9 are installed between the two on both the left and right sides of the hydraulic jack 1, and the insertion portions 4a on both sides of the belt 4 are hooked to the left and right pins 9.

The belt 4 is made of a flexible member that does not easily undergo expansion or contraction, such as a nylon sling.

The upper holder 5 attached to the tip of the jack rod 1b of the hydraulic jack 1 is made of a synthetic resin material (for example, nylon) and is formed into a substantially tunnel shape with both sides in the axial direction open and a semicircular recess 10 formed on the lower surface. , moreover, the holder 5 is a jack rod 1b
Bolt 12 to the jack head 11 screwed onto the tip
The connection is fixed.

The lower holder 6 facing the upper holder 5 is the upper holder 5.
Similarly, the lower holder 6 is made of a synthetic resin material and is open on both sides in the axial direction, and has a semicircular recess 13 on the top surface to form a substantially tunnel shape.The lower holder 6 is attached to the belt 4 with the recess 13 facing upward. It is being

To attach the lower holder 6 to the belt 4, a guide plate 14 is attached to the outer peripheral surface of the lower holder 6 with a gap through which the belt 4 is inserted, and the belt 4 is attached in the gap between the guide plate 14 and the outer surface of the lower holder 6. By being inserted, the lower holder 6 is supported so as to be movable along the longitudinal direction of the belt 4.

In addition, when the cable cover 15 to be joined has concave and convex fitting portions 16 protruding from both ends, the upper and lower holders 5 and 6 have concave portions 10 and 13.
The inner surface is smooth, and both ends are formed on the same surface so as to abut and engage with the fitting portion 16.

Furthermore, in the case of a joint cover 17 that covers the cable covers 15 over each other, a recess 18 into which a bulge 17a protruding from the semicircular top of the joint cover 17 fits is formed on the inner surface of the recesses 10 and 13. to form. (See Figure 1) Furthermore, if the fitting part 16 of the cable cover 15 is provided in a semicircular circle and the outer surface of the cover is smooth, the upper and lower cable covers should be reliably joined. To tighten, upper and lower holders 5,
Both ends of the cover 6 are formed so as to be vertically alternated with respect to the center of the cover. (See Figure 4) 19 is a cable made of PC steel stranded wire.

The oil for operating the hydraulic jack 1 may be supplied by any method such as a manual type, a foot type, or an electric pump.

With the above configuration, the cable 19 is covered with the cable cover 15, the cable is fitted from the side of the device, the upper and lower holders 5 and 6 of the cable cover 15 are positioned, and the hydraulic jack is operated in this state. When activated, the upper holder 5 presses the upper cable cover 15, and the lower holder 6 draws the lower cable cover 15 upward due to the reaction force, thereby joining the two together. At this time, the belt 4 holding the lower holder 6 has flexibility, and
Since the lower holder 6 can move along the length of the belt with respect to the belt 4, it fits well with the holder 6, applies even force to the holder 6, and automatically aligns and aligns if there is misalignment. wear it.

(Effects of the Invention) The cable cover mounting device of the present invention is constructed as described above, and is therefore lighter than conventional structures, and can be easily moved and set along the cable. Furthermore, since the holder for joining the cable cover is made of synthetic resin, the joining work can be carried out without damaging the cover. Furthermore, since the member supporting the lower holder is a flexible belt, it fits well with the holder and can apply even force to the holder, and the lower holder is movable in the longitudinal direction with respect to the belt. As a result, the lower holder has a degree of freedom, and even if there is misalignment, it has an automatic alignment function that automatically aligns and joins together, preventing the cover from deforming and ensuring stable installation. be.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a partially cutaway front view, FIG. 2 is a partially cutaway side view, and FIGS. 3 and 4 are partially cutaway views showing modified examples of the upper and lower holders. It is a front view. In the diagram, 1... Hydraulic jack, 2... Container frame, 4...
... Belt, 5, 6 ... Upper/lower holder, 10, 13
...Concavity.

Claims (1)

[Scope of utility model registration request] A flexible belt is attached in a U-shape across the jack rod to the frame holding the hydraulic jack firmly, and a synthetic resin lower holder with a semicircular recess is placed inside the belt in the longitudinal direction of the belt. A cable cover mounting device in which a synthetic resin upper holder with a semicircular recess formed at the tip of a jack rod facing the lower holder is removably attached.