JPH1026116A - Safety pin for shift prevention - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety pin for shift prevention which can be fixed without nailing. SOLUTION: This safety pin 1 comprises a cylindrical main body 3 having a cavity 2, a collar 4 formed at an open end of the cylindrical main body 4, a retaining machine screw 6 at the center of which is provided a hole communicating with the cavity 2, a coil spring 7 housed in the cavity 2 of the cylindrical main body 3 and a nail-like pin 10 a sharp tip part 8 of which is projected from the retaining machine screw 6 owing to the effect of the spring force (resiliency) of the coil spring 7 and in the proximity of the other end of which is formed a collar-like stopper 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety pin for preventing displacement between articles, between members, or between an article and a member due to vibration, and more particularly, to a temporary support column used for construction of a concrete structure. The present invention relates to a shift-preventing safety pin which can be fixed so as not to slip and fall.

[0002]

2. Description of the Related Art FIG. 12 is an explanatory view showing a use state of a temporary support used in a concrete driving step of a concrete structure construction work. In FIG. 12, reference numeral 31 denotes a bridge installed for driving concrete. Formwork, 32 is a floor surface of a concrete structure, 33 is a base plate 3 at each end.
4, and four mounting holes 35 having the same shape and the same pitch are provided on the upper and lower base plates 34, 34, respectively. 36 is the formwork 31 and the base plate 3
4 is a square bar fitted between the two.

[0003] As is well known, in the concrete driving step in the construction of a concrete structure, an aggregate serving as a framework of the concrete structure is formed by an iron bar or a wire mesh, and the aggregate is surrounded by a plate (panel) or the like to form a groove. After forming the formwork 31, concrete is poured into the formwork 31 to fill the gap between the aggregates and the space between the formwork 31 with the concrete. In the case of pouring, as shown in FIG. 12, after the form 31 is supported by the temporary support columns 33, a concrete driving operation is performed.

[0004]

At the time of concrete pouring work, vibration is applied to the mold 31 so that the concrete poured into the mold 31 is densely embedded in the mold.
This vibration is transmitted to the temporary support 33 supporting the formwork 31, and there is a danger that the temporary support will fall down due to displacement between the square bar 36 and the temporary support 33, and between the temporary support 33 and the floor surface 32. Was.

Accordingly, the present invention provides a method for fixing a nail having a resilient force by pressing a nail from one member to the other member so that the nail bites into the other member. In addition, it was notable that if this method was adopted, it was not necessary to nail and fix between articles and members that had to be removed later, and the technical problem was achieved. Things.

[0006]

The technical problem can be solved by the present invention as described below. That is, the safety pin for preventing slippage according to the present invention is provided with a hole communicating with the hollow portion at least on one end surface of the main body having the hollow portion, a flange portion formed, and the pin protruding from the hole by elastic force. That is, the pin tip presses the article or member by the resilient force to prevent a displacement due to vibration between the article or the member.

Further, in the present invention, in the displacement preventing safety pin, the main body is a cylindrical rod.

The safety pin for preventing slippage according to the present invention is characterized in that a hole is formed in at least one end face of a screw bolt having a cavity, and the pin is projected from the hole by elastic force. That is, the pin tip presses the article or member by the resilient force to prevent a displacement due to vibration between the article or the member.

The present invention also relates to the above-mentioned safety pin for preventing slippage, comprising a screw bolt, wherein the screw bolt has a bolt head, and a hole is provided in the bolt head.

Further, according to the present invention, in any of the aforementioned safety pins for preventing slippage, a coil spring is housed in a hollow portion, and the pin protrudes from the hole by the elastic force of the coil spring.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1

FIG. 1 is a perspective view showing a slip prevention safety pin according to the present invention, FIG. 2 is an exploded perspective view of the slip prevention safety pin shown in FIG. 1, and FIG. 3 is a slip prevention safety pin shown in FIG. FIG. 4 is a longitudinal sectional view illustrating the state of the slip prevention safety pin shown in FIG. 3, and FIG. 5 is a view illustrating the usage state of the slip prevention safety pin shown in FIG. In these figures, the same reference numerals as those in FIG. 12 denote the same or corresponding parts, and 1 denotes a slip-preventing safety pin (hereinafter simply referred to as "the pin") which is formed by projecting the pin from the inside of the main body of the flanged cylindrical rod by spring pressure. The safety pin 1 includes a cylindrical body 3 having a cavity 2, a flange 4 formed at one open end of the cylindrical body 3, and an opening of the cylindrical body 3. A hole 5 which is screwed to close the opening and has a hole 5
, A coil spring 7 housed in the hollow portion 2 of the cylindrical body 3, and a sharp tip 8 formed from the hole 5 of the stop screw 6 by the spring pressure (resilient force) of the coil spring 7. And a nail-shaped pin 10 having a flange-shaped stopper 9 formed near the other end. Note that 11
The safety pin 1 is inserted into the mounting hole 35 of the base plate 34 below the temporary support column 33 so that the safety pin 1 inserted downward does not come off.
Is a rubber ring inserted into the main body 3 of FIG.

Next, a description will be given of a method of using the safety pin for preventing displacement in the concrete driving step in the construction of a concrete structure.

As shown in FIG. 3 (a), when the formwork 31 is supported by the temporary support 33, the safety pins 1 are respectively inserted into four mounting holes 35 provided on the base plate 34 on the temporary support 33. Is inserted so that the pin 10 faces upward. At this time, since the collar 4 is formed on the safety pin 1, the safety pin 1 does not fall out of the mounting hole 35. The safety pin 1 is inserted into the base plate 34 below the temporary support 33 so that the pin 10 faces downward. Next, a square bar 36 is applied to the protruding pin 10 of the safety pin 1, and a temporary support 33 is provided between the lower surface of the mold 31 and the floor 32 as shown in FIG.
Is established.

As shown in FIG. 4A, the safety pin 1 has a state in which the tip 8 of the pin 10 projects from the hole 5 by the spring pressure of the coil spring 7. , The pin 10 of the safety pin 1 abutting on the square bar 36 is pressed and pushed into the cavity 2 of the safety pin 1, but the tip 8 of the pin 10 is angled by the spring pressure of the coil spring 7. It will bite into the rod 36. The safety pin 1 also acts on the floor.

In the present embodiment, the tip 8 of the pin 10 is moved by the spring pressure of the coil spring 7 so that the square bar 36 and the floor 3
2 is inserted into the temporary support 3
3 acts as if nailed to the square bar 36 and the floor surface 32, and does not shift even if vibration is transmitted to the temporary support 33, and after the work is completed, the temporary support 33
Since it is not nailed to the square bar 36 and the floor surface 32, it can be easily removed.

The outer shape of the rod material forming the main body 3 of the safety pin 1 may be a cylinder, a polygon such as a square or a hexagon, and the shape may change from the middle even if it has a constriction in the middle. And any shape may be used.

Since the flange serves as a stopper, the shape of the flange is not limited to a disk shape, but may be a shape in which a plate piece spreads radially or a thick boss shape. You may.

The tip 8 of the pin 10 does not necessarily have to be sharp as long as the spring pressure is strong.

Embodiment 2 FIG.

FIG. 6 is an exploded perspective view of the safety pin for preventing slippage according to the present invention, in which the same reference numerals as those in FIGS. 1 and 2 denote the same or corresponding parts. Corresponds to the first embodiment. In this modification, the cylindrical body 3 of the safety pin 1 is in the shape of a cylinder with an open top and bottom, and a stop screw 13 cut with a slit 12 is screwed into an opening below the cylindrical body 3. is there. In addition, nail pin 1
0 has a rounded tip 8 and a disc-shaped stopper 9 at the other end.

In the present embodiment, after the stop screw 6 through the nail pin 10 is screwed into the flange side opening of the cylindrical body 3, the coil spring 7 is inserted from the other opening and the stop screw 13 is inserted. If the screw is screwed into the opening, the safety pin 1 can be easily assembled.
The spring pressure of the coil spring 7 in the cavity 2 can be changed depending on the degree of tightening of the coil 3.

Embodiment 3 FIG.

FIG. 7 is a longitudinal sectional view showing a use state of the slip prevention safety pin according to the present invention.
3 denote the same or corresponding parts, the safety pin 14 in the present embodiment uses a hexagonal bolt instead of a flanged cylindrical rod, and a bolt head 15 is shown in FIG. The thread 16 corresponds to the cylindrical body 3 of the safety pin 1. And screw part 1
6, a cavity 2 is formed, and a coil spring 7 is housed in the cavity 2. In addition, 17 is a nut.

In the present embodiment, since the shape of the safety pin is a hexagonal bolt, it can be used by being screwed to the base plate 34 of the temporary support 23 with the nut 17 as shown in FIG. In addition, since screw bolts are standardized, they can be directly screwed to the angle of a reinforcing bar or the like.

Embodiment 4

FIG. 8 is a longitudinal sectional view showing a use state of the safety pin for preventing slippage according to the present invention.
7 denote the same or corresponding parts, and the safety pin 18 in the present embodiment is the same as that in the third embodiment. A stud bolt is used in place of the hexagon bolt in the safety pin 14 shown in FIG. 1, and the pin 10 protrudes from both ends by the spring pressure of the coil spring 7 housed in the cavity 2. In addition, 17 is a nut and 19 is a flat plate-like plate.

In this embodiment, a plurality of holes 20 for inserting the studs are equally formed in the abutment plate 19, and the safety pins 18 formed of the studs are screwed into the holes 20 with the nuts 17 and mounted. By using it as a backing plate sandwiched between abutting articles or the like, it is possible to prevent an article that does not want to move or shift due to vibration generated during transportation or the like.

Embodiment 5

FIG. 9 is a perspective view showing a slip prevention safety pin according to the present invention, FIG. 10 is a longitudinal sectional view of the slip prevention safety pin shown in FIG. 9, and FIG. 11 is a slip prevention safety pin shown in FIG. FIG. 4 is a view for explaining a use state of the safety pin 21 according to the present embodiment. The push pin type pin 27 is projected from the hole 26 formed in the hole by the spring pressure of the leaf spring 25. Reference numeral 28 denotes a case in which precision parts are built.

In the present embodiment, the pin 27 of the safety pin 21 is connected to one of the articles or the other article from the inside of the case in order to prevent a displacement between small articles or a case in which precision parts are built in due to vibration. Alternatively, it can be used by pressing against the case.

The case 28 to which the pin 27 abuts is
If a depression is formed in advance, the tip of the pin 27 may be flat.

Further, rubber may be used instead of a leaf spring as the elastic body having elasticity.

[0035]

As described above, according to the present invention, a pin having elasticity is pressed from one article or member to another article or member so that the tip of the pin bites into the other member. , The members are fixed to each other, so that no displacement occurs between the two members even when vibration is applied. Also, since the tip of the pin is not driven,
It is easy to remove and can be used in various ways to prevent slippage.

Therefore, it can be said that the industrial applicability of the present invention is very high.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a slip prevention safety pin according to the present invention.

FIG. 2 is an exploded perspective view of the slip prevention safety pin shown in FIG.

FIG. 3 is a view for explaining a use state of the shift prevention safety pin shown in FIG. 1;

FIG. 4 is a vertical cross-sectional view illustrating a state of a safety pin for preventing slippage shown in FIG. 3;

FIG. 5 is a view for explaining a use state of the slip prevention safety pin shown in FIG. 1;

FIG. 6 is an exploded perspective view of the slip prevention safety pin according to the present invention.

FIG. 7 is a longitudinal sectional view showing a use state of the safety pin for preventing displacement according to the present invention.

FIG. 8 is a longitudinal sectional view showing a use state of the safety pin for preventing slippage according to the present invention.

FIG. 9 is a perspective view showing a safety pin for preventing displacement according to the present invention.

FIG. 10 is a longitudinal sectional view of the slip prevention safety pin shown in FIG. 9;

FIG. 11 is a view for explaining a use state of the shift prevention safety pin shown in FIG. 9;

FIG. 12 is an explanatory diagram illustrating a use state of a temporary support used in a concrete driving step of a concrete structure construction work.

[Explanation of symbols]

 1,14,18,21 Safety pin for prevention of slip 2,24 Cavity 3,23 Main body 4,22 Flange 5,26 Hole 6,13 Stop screw 7 Coil spring 8 Tip 9 Stopper 10,27 Pin 11 Ring 12 Sliding Split 13 Stop screw 15 Bolt head 16 Screw 17 Nut 19 Abutment plate 20 Hole 25 Leaf spring 28 Case 31 Formwork 32 Floor surface 33 Temporary support 34 Base plate 35 Mounting hole 36 Square rod

Claims (5)

[Claims] At least one end face of a main body having a hollow portion is provided with a hole communicating with the hollow portion, a flange is formed, and a pin is projected from the hole by a resilient force. A safety pin for preventing slippage, wherein an article or member is pressed by force to prevent a shift between articles or members due to vibration. 2. The slip preventing safety pin according to claim 1, wherein the main body is a cylindrical rod. 3. A screw bolt having a hollow portion, wherein at least one end surface of the screw bolt is provided with a hole communicating with the hollow portion, and a pin is protruded from the hole by a resilient force. A shift preventing safety pin, which presses an article or member to prevent a shift due to vibration between the articles or members. 4. The safety pin according to claim 3, wherein the screw bolt has a bolt head, and a hole is provided in the bolt head. 5. The safety pin according to claim 1, wherein a coil spring is housed in the cavity, and the pin protrudes from the hole by the elastic force of the coil spring.