JPH0340915Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field A pair of resistance plates connected to each other at the upper ends are installed opposite each other, and the resistance plates have a bulge in the center along the vertical direction of the resistance plates, leaving flat plate parts on both sides. A branch line anchor is known, for example, as described in Japanese Patent Publication No. 56-10415, in which the lower end of the branch rod connected to the branch line is attached to the lower end of the resistance plate. However, the present invention relates to a driving device for a branch line anchor having such a structure.

Prior Art and Problems As a conventional example, there is one disclosed in Japanese Patent Publication No. 11823/1983, for example.

The device described in this publication has a structure in which the expansion rod that engages with the bulging part of the anchor is engaged with the driving tube from the tip side, and the starting rod is inserted from the rear end of the driving tube to drive the anchor. There is.

With the conventional structure, the branch anchor engaged in the driving tube is driven together with the driving tube to a predetermined depth by hitting the tail end of the driving tube, and then only the expansion rod engaged with the anchor bulge is driven into the driving tube as appropriate. After starting the expansion movement of the tip of the resistance plate by driving the rod-shaped hammer through the starting rod, the tail end of the resistance plate is subsequently hit with the rod-shaped hammer,
Eventually, a predetermined expanded state is obtained.

This conventional type is relatively quick to drive, but since the expansion rod is left buried underground, it is necessary to prepare the expansion rod for disposable use. However, they are inevitably expensive.

Means for Solving Problems A driving tube having an inner diameter sufficient to insert the bulging portion of the resistance plate and having a notch at the lower end opposite to allow the flat plate portion of the resistance plate to pass through, and an anchor that is accommodated in the driving tube and having an inner diameter sufficient to insert the bulging portion of the resistance plate. An expansion rod is inserted between the bulging portions of the resistance plate to press the anchor, and is provided with a pressure-receiving portion having a diameter wider than the inner diameter of the locking step provided at the lower side of the driving tube, and a driving rod in the intermediate portion. It is equipped with a weighting member that also serves as pressure, and consists of a driving rod that selectively inserts both ends into the driving cylinder and presses the driving cylinder and the upper end of the expansion rod.

Embodiment The drawing shows an embodiment of the branch anchor driving device according to the present invention, and the present invention includes a driving tube A and an expansion rod B.
and a driving rod C.

The driving cylinder A has a locking step 2 on the lower side of the inner wall 1' of the cylinder body 1 which has both upper and lower ends open, and cuts 3, 3 are provided oppositely to the locking step 2 closer to the lower end of the main body. Notches 4, 4 are provided between the notches 3, 3 and are placed opposite each other, and a reinforcing cylinder 5 is fixed to the upper end of the main body, and handles 6, 6 are provided protruding from the side surface of the reinforcing cylinder 5, It is constructed by providing a modified insertion opening 7 on the upper edge.

The expansion rod B has a stepped portion 8 in the middle, a small diameter portion 9 on the lower side with a pointed lower end, and a large diameter portion 1 on the upper side.
0, and a pressure receiving part 11 having a diameter wider than the inner diameter of the locking step part 2 of the driving cylinder A is provided on the upper edge.

The driving rod C shown in FIGS. 5 and 6 is constructed by connecting a long pressing rod 13 and a short guide rod 14 to the top and bottom of a weighting member 12, which has a larger diameter than the driving cylinder A and also serves as a driving force. , a driving cylinder A is attached to the tip of the driving rod 13.
A locking portion 15 having a similar cross section to the insertion opening 7 is provided. The length of the guide rod 14 may be such that when it is inserted into the driving tube A, its tip does not come into contact with the pressure receiving part 11 of the expansion rod B inserted into the driving tube A.

After the expansion rod B is housed in the cylinder body 1, the reinforcing cylinder 5 is welded and fixed to the upper end of the main body 1, and the driving cylinder A and the expansion rod B are combined, the driving rod C of the driving rod C is fixed.
3 or the guide rod 14 from the insertion port 7.
It is used by inserting it into

E shows a branch line anchor using the driving tool of the embodiment. The branch line anchor E has a pointed lower end, and flat plate portions 20, 20 on both sides along the vertical direction.
The central part is a bulging part 21, and the bulging parts 21, 21 are turned outward to face each other to form flat plate parts 20, 2.
A pair of identical resistance plates 2 whose upper ends are welded together
2, 22, and the bulging portions 21, 21 have horizontal cuts 23, 23 extending between the flat plate portions 20, 20.
... are arranged in a row with appropriate gaps in the vertical direction, and the lower ends of branch rods 25 are welded to the lower ends of the bulges 21, 21 via propulsion pieces 24, 24 welded to the lower ends of the bulges, The upper end of the branch wire rod 25 is located above the resistance plate 22 and has a connecting ring portion 26 for connection to the branch wire.

Note that 27 is a reinforcing cut for assisting the bending of the resistance plate 22.

This branch line anchor E is buried in the ground as follows using the driving tool of the embodiment.

The mutually overlapping flat plate portions 20, 20 of the resistance plates 22, 22 of the anchor E are inserted into the notches 3, 3 provided oppositely at the lower end of the driving tube A, and the upper end 24' of the driving piece 24 is inserted into the notches 3, 3. The bulging parts 21, 21 of the anchor E are inserted into the driving tube A from the lower end so as to engage with the notches 4 arranged perpendicularly to the bulging parts 21, 21, and the gap 21' formed by the bulging parts 21, 21 is
Then, the lower small diameter portion 9 of the expansion rod B is inserted, and the driving tube A, the expansion rod B, and the branch anchor E are assembled to each other (FIG. 7).

Then, the driving tube A and the branch anchor E are stood upright on the ground, the guide rod 14 side of the driving rod C is inserted into the driving tube A through the insertion opening 7, and the driving tube 4 is pressed with the weight member 12. A is driven into the ground together with the branch anchor E to an appropriate depth.

Next, as a second step operation, hold the driving tube A until the lowermost cut of the bulging portion cuts 23, 23, ... provided in the resistance plate 22 of the anchor E is exposed from the lower end tip of the driving tube A. 6, 6 (Figure 8).

After that, insert the driving rod 13 side of the driving rod C into the driving tube A, and press the expanding rod B with the pressing rod 13 until the step 8 of the expanding rod B contacts the upper end of the anchor resistance plate 22.
When pressed, the bulges 21 of the resistance plates 22, 22,
The expansion rod B inserted into the gap 21' of 21 is lowered, and as a result, the tip portions of the pair of resistance plates 20, 20 are pushed apart and the curved movement starts.

At this point, pull up the driving cylinder A in the same way as in the previous step, engage the notches 4, 4 provided in the cylinder body 1 with the upper ends of the resistance plate flat plate parts 20, 20 of the anchor E (Fig. 9), and again. Resistance plates 20, 2 are connected by the pressing rod 13.
When a pressure of 0 is applied, the resistance plates 20, 20 in the previous stage whose lower end tips are in a state of starting to curve in opposite directions to each other.
Due to the presence of the expansion cuts 23, 23, . . . , the expansion curve progresses along a fixed trajectory while being bent, and eventually reaches the final expansion state (FIG. 10).

Then, when the driving tube A is pulled up using the handles 6, 6, the expansion rod B is attached to the locking step 2 of the driving tube A.
The driving force part 11 is locked, and the expansion rod B is moved to the driving cylinder A.
It is pulled out as a result.

In order to make the lifting amount or the driving amount of the driving tube A appropriate, it is preferable to attach a mark a at an appropriate place on the main body 1 of the driving tube A.

Effects of the invention Since the present invention has the above-mentioned structure, it is possible to securely and firmly drive the anchor to a predetermined depth underground, and there are no disposable parts, making it possible to reduce the cost of the branch line anchor. can.

[Brief explanation of the drawing]

The drawings show an embodiment of the branch anchor driving device according to the present invention, and FIG. 1 is a partially cutaway front view of the driving tube and expansion rod combined, FIG. 2 is a side view of the same, and FIG. Figure 3 is a plan view of the same, Figure 4 is a front view of the expansion rod, Figure 5 is a front view of the driving rod, Figure 6 is a plan view of the same, and Figures 7 to 10 show the order in which the driving tool is used. 11 is a front view of the branch line anchor, and FIG. 12 is a side view of the same. A... Driving tube, B... Expansion rod, C... Driving rod, E... Branch line anchor, 2... Locking step, 3...
... cut, 11 ... pressure receiving part, 12 ... weighted material, 2
0... Flat plate portion, 21... Swelling portion, 22... Resistance plate, 23... Cut, 25... Branch rod.

Claims (1)

[Scope of utility model registration request] A pair of resistance plates connected to each other at the upper ends and placed opposite each other is provided with a bulge in the center that protrudes in opposite directions along the vertical direction of the resistance plate, leaving the flat plate portions on both sides, and the bulge is provided with a bulge as appropriate. A driving tool for a branch line anchor has a number of horizontal cuts in a row and a branch rod to be connected to the branch line is attached to the lower end of the resistance plate. a driving tube with openings at both upper and lower ends, each having a notch for passing through the flat plate portion of the resistance plate;
An expansion rod is inserted between the bulges of the anchor resistance plate to press the anchor, and is equipped with a pressure-receiving part having a diameter wider than the inner diameter of the locking step provided on the lower side of the driving cylinder, and an expansion rod in the middle part. A branch line anchor driver comprising a driving rod that is equipped with a weighting member that also serves as a driving force and that selectively inserts both ends into the driving cylinder to press the upper ends of the driving cylinder and the expansion rod.