JPH0530352U - Concrete form supporting rod - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the weight of concrete formwork support rods and improve the durability of stretchable parts. [Structure] The base of the inner pipe (30) with the receiving plate (31) attached to the tip and a plurality of pin holes (33) drilled in the axial direction slidably fits to the base of the outer pipe (10), Connecting pin (4
(0) is slidably received in the axial direction (12) in the outer pipe, and the male pipe (15) to be screwed into the connecting pipe (20) with the female screw (21) engraved on the entire inner surface is installed. ) Is provided apart from the end (11) of the outer pipe base and adjacent to the elongated hole (12), and the wall thickness for receiving both ends (41) of the connecting pin protruding outward from the elongated hole The portion (22) is provided at the base of the connecting pipe, and the inner pipe (30) is linearly withdrawn from the outer pipe (10) via the connecting pin by turning the thick portion, When the connecting pipe (20) moves up and down between the upper and lower limit positions regulated by the elongated hole (12), the male screw (15) is completely covered by the connecting pipe regardless of its position and Stay protected. [Effect] Good durability even if made of aluminum.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, the base portion of the inner pipe having the receiving plate attached to the tip to support the form via the thick end material slides to the base portion of the outer pipe having the seat plate to be brought into contact with the ground. The present invention relates to a concrete form supporting rod which is fitted as much as possible, and has both base portions relatively expandable and contractable by a screw mechanism and a pin so that a relative positional relationship can be fixed.

[0002]

[Prior Art]

 Conventionally, this type of supporting rod is generally made of steel material, and a male thread is cut on the outer peripheral surface of the base of the outer tube, and a short operating ring having a female thread on the inner peripheral surface is screwed to the male thread portion. A pin projects from the outer peripheral surface of the inner pipe, and the tip of the pin protruding from an elongated hole formed along the axial direction of the male screw part is supported on the peripheral edge of the end of the operating ring. It was a configuration to let.

[0003]

[Problems to be solved by the device]

 However, in this configuration, the long hole is cut in a state of longitudinally cutting the male screw portion of the outer pipe, and the male screw portion is only partially covered with the operating ring, and the large portion is always present. Was exposed to the outside. Therefore, mortar that falls from the space of the concrete form will solidify at the threaded portion, and especially at the boundary between the edge of the long hole and the thread, the solidified mortar may damage the thread. Yes, and often prevented normal use thereafter. Since it is not possible to replace only the expansion and contraction structure part, it is necessary to replace the entire formwork support rod including the outer pipe and the inner pipe with a new one, which is one of the factors that increase the cost of concrete placing work. Was becoming.

Therefore, an object of the present invention is to screw a connecting pipe of an appropriate length as described below to the outer periphery of the outer pipe base on which the female screw is engraved, and to connect both ends at the thick portion at one end of the connecting pipe. The coupling pin to be supported is closely fitted in the pin hole of the inner pipe and slidably fitted in the elongated hole of the outer pipe in the axial direction, and the pin, and therefore the inner pipe, has any one of the upper and lower limits and the middle. Even if the male rod is in the position, the problem that the conventional support rod expansion and contraction structure has is solved all at once by making the male pipe completely covered with the connecting pipe. As a result, even if the supporting rod is made of not only steel but also lightweight aluminum, it is possible to provide a structure that can enhance its durability.

[0005]

[Means for Solving the Problems]

 The concrete formwork support rod of the present invention made to achieve this object is composed of an inner pipe, an outer pipe, a connecting pipe and a connecting pin. More specifically, a plurality of pins are provided on the inner pipe at appropriate intervals in the axial direction. A connecting pin, which has a hole formed therein and which can be selectively set in the pin hole, is slidably fitted into an elongated hole formed between the male screw portion and the end portion of the outer pipe. With the both ends of the connecting pin projecting outward from the bearing being supported by the thick portion of the end of the connecting pipe, the connecting pipe is rotated to move the inner pipe between the upper and lower limit positions through the connecting pin. When the male screw portion is retracted and retracted, the male screw portion is always covered with the connecting pipe, and a triple pipe is formed at this portion.

[0006] Specifically, the base of the inner pipe, which has a backing plate attached to the tip to support the concrete formwork through the thick ends, is slidably fitted to the base of the outer pipe having a seat plate attached to the tip. However, it is the same as the prior art that both bases are relatively expandable and contractable and the relative positional relationship is fixed by the screw mechanism and the pin, but in the present invention, in the present invention, the inner pipe is axially extended. Connecting pins that can be selectively set in a plurality of pin holes that are bored at appropriate intervals are provided in a pair of axial elongated holes that are bored adjacent to the base of the outer tube, adjacent to its ends, and facing each other. Both ends are projected outward and are fitted slidably, and a male screw is engraved on the outer tube adjacent to the end of the elongated hole on the side separated from the end, and a connecting pin So that it can be moved between the upper and lower limit positions regulated by the slotted holes. A female thread is engraved over the entire length on the inner surface of the longer connecting pipe, and the base portion of the connecting pipe on the side facing the end of the outer pipe has a wall thickness protruding outward in the radial direction. A portion is provided, and by rotating the thick portion that supports both ends of the connecting pin, the inner pipe is slid through the pin between the upper limit position and the lower limit position regulated by the elongated hole. It is a composition to move.

In the concrete form supporting rod of the present invention, the male screw should always be kept covered by the connecting pipe when the connecting pipe and the inner pipe slide. It is important that a specific dimensional relationship is given to the connecting pipe, the slot and the male screw. The "base" of the outer pipe and the connecting pipe refers to the part facing the inner pipe, and the "base" of the inner pipe refers to the part facing the outer pipe and the connecting pipe.

In consideration of manufacturing convenience, the supporting rod of the present invention is such that the portion extending from the elongated hole formed in the upper portion of the outer pipe to the male screw is a short pipe separate from the main portion of the inner pipe. It is convenient to manufacture them separately and fit them to the main part and weld them, for example, join them by spot welding. Since the male threaded portion of the short pipe protrudes appropriately from the outer peripheral surface of the inner pipe, if the portion lower than the male screw portion is inserted into the inner pipe, it will not move upward during use. It is convenient that the load from the can be received by the shoulder-shaped male screw.

Similarly, the thick portion of the connecting pipe can be easily manufactured by separately manufacturing a ring-shaped piece and externally welding the ring-shaped piece to the connecting pipe main body, for example, tap welding. As means for receiving an external force for turning the connecting pipe, the operation handle may be pivotally attached to the outer periphery of the thick portion, or the outer peripheral surface of the thick portion may be formed into a polygonal shape such as a nut. It can take the form.

Further, although the inner pipe may be a single pipe, the gap between the mold and the ground (or including the concrete surface which has already been hardened by casting in the preceding work) and the formwork The inner tube itself may have a double tube structure of a telescopic type in order to adapt to the size. This also applies to the outer tube.

[0011]

[Action]

 Since the present invention has such a configuration, the distance between the receiving plate at the tip of the inner pipe and the seat plate at the tip of the outer pipe is slightly smaller than the above-mentioned distance between the mold and the ground. First, select the proper position from the multiple pin holes of the inner tube, insert the connecting pin, and set. Next, when this supporting rod is positioned between the formwork and the ground, and the connecting pipe is rotated by turning the operation handle, for example, the end face of the thick portion between the connecting parts pushes up the connecting pin while sliding the connecting pin in the elongated hole. Therefore, the inner pipe is pushed out linearly from the outer pipe, and the supporting frame holds the formwork on the ground without shaking. At that time, since the upper and lower limit positions of the connecting pin are restricted by the long holes, there is no possibility that the inner pipe will accidentally come off upward. In particular, since the male screw on the outer surface of the outer pipe is always completely protected by the connecting pipe, it is possible to avoid the conventional situation of forcibly tightening the falling mortar despite the solidification of the falling mortar. There is no risk of damaging the threads.

Further, since the screw threads are covered, even if rough work is performed, external impact is not directly applied to the screw threads, and the screw portion is in a completely protected state. Keep Therefore, even if the supporting rod of the present invention is manufactured by using an aluminum material which is relatively softer than steel material, there is no problem in durability, and on the contrary, there is an advantage that the work of assembling the form becomes easy because of its light weight.

[0013]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the concrete form supporting rod is shorter than the outer pipe (10) to the outer circumference of the outer pipe (10) base. The connecting pipe (20) is screwed, and the inner pipe (30) is inserted from the side of the base (35) into the outer pipe (10) surrounded by the base of the connecting pipe (20). Both ends (41), (41) of the connecting pin (40) inserted into a selected one of a plurality of pairs of pin holes (33) that are formed in opposed relation at appropriate intervals in the axial direction. Is supported by the thick wall portion (22) at the upper end of the connecting pipe (20). The connecting pin (40) is slidable in a pair of axial elongated holes (12), (12) formed in opposed relation adjacent to the end (11) of the base of the outer tube (10). It is fitted.

A male screw (15) is engraved on the outer tube (10) adjacent to the end (13) of the elongated hole (12) on the side separated from the end (11). A female screw (21) screwed into the screw (15) is formed on the side facing the end (11) of the base of the outer pipe (10) of the connecting pipe (20) engraved on the inner surface over the entire length. The end portion (23) is provided with the above-mentioned thickened portion (22) protruding outward in the radial direction. As shown in FIG. 3, the upper end surface of the thick portion (22) pushes up both end portions (41), (41) of the connecting pin (40) upward, and after setting, the load from above is applied to the pin. Receive through.

Each of the pipes (10), (20) and (30) is made of a material which is excellent in strength and rust resistance, lightweight and easy to handle, for example, an aluminum alloy.

A seat plate (14) is attached to the tip of the outer pipe (10) for stable contact with the ground or the like (G), and a concrete formwork (14) is attached to the tip of the inner pipe (30). There is a backing plate (31) attached to the vertical or horizontal edge thick material (B) that supports K).

The inner pipe (30) may be a single pipe as shown in the right end of FIG. 1, but is provided with pin holes (33), (34) as shown in the center and left ends of FIG. Alternatively, two pipes (30a) and (30b) may be connected by a pin (32) in a telescopic manner so that the length thereof can be freely changed.

The structure of the present embodiment will be described in more detail with reference to FIGS. 2 to 4. The outer tube (10) includes an elongated hole (12), a male screw (15), and a small diameter portion (16) from the end (11) of the base. The short tube (10a) provided with and in this order is integrated by tightly fitting the small diameter portion (16) from the end of the main body of the outer tube and spot welding from the outer surface. The male screw (15) part protrudes slightly outward from the outer peripheral surface of the outer pipe main body, and the shoulder step (16a) between this and the small diameter part (16) abuts on the end face of the outer pipe main body. , It also acts to receive the load from above regardless of the quality of spot welding.

Unlike the conventional product, the long hole (12) does not intersect with the male screw (15), and the screw thread has a smooth spiral shape with no discontinuity from the start end to the end. In the present invention, although the male screw (15) engraved with the connecting pipe (20) has a large axial length, the connecting pipe can be easily screwed.

Then, by making the outer diameter of the portion where the long hole (12) is drilled in the short pipe (10a) equal to the outer diameter of the main body of the outer pipe (10), the outer pipe (10) may be It functions as if it were originally an integrally molded product, and the connecting pipe (20) screwed into this product can be smoothly moved up and down.

On the other hand, a ring-shaped piece externally fitted and tap-welded to the end of the connecting pipe (20) on the side of the base (23) constitutes the thick portion (22), and is located at the opposite position to the outside. An operating handle (26) is attached to one of the pair of protrusions (24), (25) formed toward the one (24) so as to be able to stand up and down freely by a pivot (27). Therefore, a large tool such as a pipe wrench can be used to push the inner pipe (30) by turning the connecting pipe (Fig. 1, arrow U) by placing it on both protrusions (24) and (25), but the load is light. In some cases, the inner tube (30) can be raised and lowered (arrow V in FIG. 1) by raising the operation handle (26) and turning it by hand.

As shown in FIG. 4, the seat plate (14) has a substantially rectangular shape, with holes (18) into which anchor bolts or screws are to be inserted at four corners thereof, and nails for inserting nails at the sides. Each has a hole (17). Although not shown, the receiving plate (31) is also the same.

Although the embodiments considered to be typical of the present invention have been described above, the present invention is not necessarily limited to the structures of these embodiments, and is provided with the above-mentioned constitutional requirements referred to in the present invention. The present invention can be carried out by appropriately modifying it within a range that achieves the object of the present invention and has the following effects. For example, the outer pipe (10) does not necessarily have to be made of aluminum, and the outer pipe (10) is fitted with a short pipe with male threads engraved in the vicinity of the long hole of the pipe with long holes. It is also possible to manufacture it by welding at the end face portion and the like.

[0022]

[Effect of the device]

 Since the concrete form supporting rod of the present invention is constructed as described above, even if mortar or the like falls from above, it will not be deposited on the threads of the male screw of the outer pipe, and the screw that is further covered. Since no external impact is directly applied to the portion, the durability of the threaded portion is improved, and thus the durability of the supporting rod itself is significantly improved. Further, since the male screw engraved away from the long hole has no discontinuity at all, the defect that the thread of the conventional product is damaged at the discontinuity is eliminated. Furthermore, the outer pipe is sandwiched between the inner pipe and the connecting pipe to maintain the structure of "triple pipe" regardless of the size of expansion and contraction. Therefore, the inner pipe is directly inserted into the outer pipe. The connection strength between the inner and outer pipes is significantly improved compared to the one.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is an enlarged exploded perspective view of the same main part.

3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a cross-sectional view taken along line 4-4 of FIG.

[Explanation of symbols]

 (10) Outer pipe (11) Outer pipe base end (12) Oval hole (13) Oval hole end (14) Seat plate (20) Connecting pipe (21) Female screw (22) Thick portion (23) Connection Pipe base (30) Inner pipe (31) Support plate (33) Pin hole (35) Inner pipe base (40) Connecting pin (41) Both ends of connecting pin (K) Concrete formwork (B) End thick material (G) Ground

Claims (1)

[Scope of utility model registration request] 1. A base portion (35) of an inner pipe (30) having a receiving plate (31) attached to a tip thereof for supporting a concrete formwork (K) through a thick end material (B), and a base plate (35) at the tip. 14) which is slidably fitted to the base of the outer tube (10) to which it is attached, and is connected by a screw mechanism and a connecting pin so that both bases can be expanded and contracted relatively and the relative positional relationship can be fixed. A plurality of pin holes (33) are formed in the inner pipe (30) at appropriate intervals in the axial direction, and the connecting pin (40) that can be selectively set in the pin holes is the outer pipe (10). 1) Adjacent to the end of the base (11) and facing opposite
Both ends (41), (41) are slidably fitted to the pair of axial elongated holes (12), (12) so as to be slidable, and the outer tube (10) is fitted with the base portion. The end (1) of the slot (12) on the side distant from the end (11)
A male screw (15) is engraved adjacent to 3), and the connecting pin (40) is moved by the male screw (15) so that it can be moved between the upper and lower limit positions regulated by the elongated hole (12). Long enough connection pipe (2
The inner surface of (0) is engraved with a female screw (21) over its entire length, and the base portion (23) of the connecting pipe (20) on the side facing the end (11) of the outer pipe (10). ) Is provided with a thick portion (22) protruding outward in the radial direction, and an external force in the rotational direction is applied to the thick portion (22) that receives both ends (41) and (41) of the pin. By adding the pin (4
When sliding the inner pipe (30) between the upper limit position and the lower limit position regulated by the elongated hole (12) via (0), the male screw (15) is always connected by the connecting pipe (20). A concrete form supporting rod characterized in that a relative dimensional relationship for keeping a covered state is given to the connecting pipe (20), the elongated hole (12) and the male screw (15).