JP3422950B2 - Construction site slab joints - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint for a spread iron plate for a construction site.

[0002]

2. Description of the Related Art In a conventional joint of this kind, a laying iron plate and a laying iron plate are sandwiched from above and below by two fixed bodies provided with bolts and nuts, and nuts are tightened,
2. Description of the Related Art There is a structure in which two fixed bodies bite a laid iron plate to prevent vertical or lateral displacement of the laid iron plate.

[0003]

In the above-mentioned conventional joint, when the iron plate to be connected, which is hung by a crane, and the end of the iron plate are sandwiched by two fixing bodies from above and below, the interval for inserting the bolt is In order to prevent the edge of the spread iron plate from being blocked, a worker puts his or her hand on the spread iron plate to position the edge of the spread iron plate. However, the Occupational Safety and Health Regulations stipulate that "the worker should not be allowed to enter a place where there is a risk of danger to the worker due to contact with the suspended load or drop of the suspended load." In the conventional method of connecting the laid iron plates by the joint, since the worker enters near the laid iron plates suspended by the crane, there is a problem in that the above method is violated. An object of the present invention is to provide a joint for a spread iron plate for a construction site that can solve such problems.

[0004]

In order to achieve the above object, the present invention provides: (1) The invention according to claim 1 corresponds to a position equidistant from the center of a circular or square iron plate. At the position to be provided, a projection having tapered side surfaces for positioning the laying iron plate to be connected is provided so as to integrally project from the iron plate, and a screw hole is provided at the center of the iron plate. And a small diameter hole for passing the screw bolt and a large diameter hole for storing the screw head of the screw bolt in the central portion of the iron plate with the corners of the upper surface rounded. In each of the above-mentioned bases, a cup made by punching a steel pin is provided at a position opposite to a position at which the protrusions are equally spaced from each other on both sides, and a small-diameter hole of the cup is passed through the cup. Has a screw part that is screwed into the screw hole Characterized in that comprising a belt upper end it threaded bolt formed by providing a screw head that is stored in the hole of the large diameter of the cup. (2) According to the invention of claim 2, at the positions corresponding to the positions equally spaced from the center of the circular shape to both sides, tapered both side surfaces for positioning the laid iron plate to be toughened are provided. Provided so as to integrally project the protrusion having from the iron plate, in the center of the iron plate, a base provided with a screw hole, and an iron plate having a diameter larger than the diameter of the iron plate,
In the center of the iron plate that has a rounded taper from the center of the upper surface to the periphery, a small diameter hole for passing the screw bolt and a large diameter hole for storing the screw head of the screw bolt are provided. On the lower surface of the base plate, at positions corresponding to the positions equally spaced from the protrusion on both sides, a cup made by punching steel pins and a small-diameter hole in the cup are passed through to It is characterized in that it comprises a bolt having a screw head at the upper end of the bolt screwed into the screw hole. (3) The invention of claim 3 is, in the joint of the laid iron plate for a construction site according to (1) or (2), the upper end face of each protrusion provided so as to integrally project from the base, It is characterized by applying a paint of a conspicuous color or a paint that emits a fluorescent color. At the joint of the above-mentioned iron plate for construction site, suspend the iron plate with a crane,
When the side surface of the end of the spread iron plate that is going to connect is lowered while contacting the tapered side surface from the protrusion provided on the base, the end of the spread iron plate will drop to the position determined by the top surface of the base. , Workers do not have to touch the laid iron plate.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. Reference numeral 1 denotes a base, which has a peripheral edge formed into a circular shape or a square shape. Providing protrusions 5 and 6 having both side surfaces with tapers 3 and 4 for positioning the iron plate to be connected so as to integrally project from the iron plate 2 at evenly spaced positions The portion is provided with a screw hole 7, and the lower surface of the iron plate 2 is provided with a plurality of ribs 8. A cap nut may be used for the screw hole 7. On the upper end surfaces of the protrusions 5 and 6, a paint of a noticeable color or a paint emitting a fluorescent color is applied. By configuring the protrusions 5 and 6 in this way, there is an advantage that it becomes easier for a worker to confirm the positions of the protrusions 5 and 6 when performing work for connecting iron plates laid in the daytime or nighttime. Reference numeral 9 denotes a cup, which has a rounded iron plate 11 having a corner portion on the upper surface side formed into a radius 10 and a diameter slightly smaller than the diameter of the base 1, and a small diameter hole 12 through which a screw bolt is inserted, and a screw bolt. A large-diameter hole 14 for accommodating the screw head formed at the upper end of the cup and having a space 13 for fitting a wrench is provided.
Steel pins 15 are provided at positions corresponding to the positions on the base 1 that are equally spaced from the protrusions 5 and 6 on both sides, and the protrusions 5 are provided at intervals of the pins 15.
A recess 16 into which the upper end of 6 can enter is provided. Each pin 1
As shown in FIG. 3, punches 18, 18 are provided on both sides of the pin 5 to prevent the pin 15 from moving. The cup 9 and the base 1 are surface-treated by unichrome plating. Reference numeral 19 denotes a screw bolt, which has a hexagonal screw head 22 housed in the large diameter hole 14 at the upper end of the bolt 19 which has a screw portion 20 which passes through the small diameter hole 12 and is screwed into the screw hole 7. Become. 17 is a screw head 22
Washer or spring washer that receives the lower surface of the.

[0006] In the joint of the spread iron plate for the construction site having the above-mentioned structure, the spread iron plate 2 suspended by a crane is used.
3 and the end side surface of the spread iron plate 24 to be connected are lowered from above the projections 5 and 6 while contacting the side surfaces of the projections 5 and 6 with the taper 3 and 4. As shown in FIG. 2, the end side surface of the spread iron plate 23 and the end side surface of the spread iron plate 24 are lowered to a predetermined position having an interval 25 slightly wider than the interval through which the screw bolt is inserted on the upper surface of the base 1. There, the crane was moved away and the cup 9
The end of the spread iron plate 23 and the end of the spread iron plate 24, and the tips of the pins 15 are abutted against the end upper surface of the spread iron plate 23 and the end upper surface of the spread iron plate 24, and at the same time, the projection 5 ,
The upper end of 6 is put under the recesses 16, 16. Then, after passing the screw bolt 19 through the small-diameter hole 12, the screw portion 2
0 is screwed into the screw portion 7, and the screw head 22 is screwed into a position where the screw head 22 is completely stored in the large-diameter hole 14, and the cup 9
When tightening the
The spread iron plate 23 and the spread iron plate 24 are connected by biting into the upper surfaces of the end portions of 3 and 24. Reference numeral 16 denotes a concave portion provided on the lower surface of the cup 9 so as to provide a lightweight and easy-to-carry joint for a construction site iron plate. In addition, the side surfaces of the end portions of the other two laid iron plates to be connected are the protrusions 5 and 6.
When the cups 9 are lowered while coming into contact with the side surfaces of the protrusions 5 and 6 having the tapers 3 and 4 from above, and the cups 9 are tightened with the screw bolts 19, four laid iron plates can be connected.

Next, a second embodiment of the present invention will be described with reference to FIGS. 4 to 14. Reference numeral 26 is a base, which is equidistant from the center of a circular iron plate 27 having rounded edges. Protrusions 30 and 31 having both side surfaces with tapers 28 and 29 for positioning the laid iron plate to be connected are provided so as to integrally project from the iron plate 27 at the position where the iron plate 27 is to be connected. , Screw holes 32 are provided, and a plurality of ribs 33 are provided on the lower surface of the iron plate 27. A cap nut may be used for the screw hole 32. It should be noted that a paint of a prominent color or a paint that emits a fluorescent color is applied to the upper end surfaces of the protrusions 30 and 31. By configuring the protrusions 30 and 31 in this way, there is an advantage that the positions of the protrusions 30 and 31 can be more easily confirmed when performing the work of connecting the spread iron plates in the daytime or the nighttime. In FIG. 5, reference numeral 34 denotes a cup, which is an iron plate having a diameter larger than the diameter of the iron plate 27, and a screw bolt is provided at the center of the iron plate 36 having a large rounded taper 35 from the upper middle portion to the peripheral portion. A small-diameter hole 37 through which the screw head is formed and a large-diameter hole 39 that stores the screw head formed at the upper end of the screw bolt and has a space 38 for fitting a wrench are provided. A steel pin 40 is provided at a position corresponding to a position spaced equidistantly from both sides of the protrusions 31 and 32, and a protrusion 31 is provided at a portion of the cup 34 that faces the protrusions 30 and 31. , 32 are provided with holes 43, 43 into which the upper ends of the holes 32, 32 can enter. The cup 43 and the base 26 are surface-treated by unichrome plating. On both sides of each pin 40, as shown in FIG. 12, punching 51 to prevent the pin 40 from moving,
51 is given. In FIG. 5, 44 is a screw bolt,
The screw portion 4 which passes through the small-diameter hole 37 and is screwed into the screw hole 32.
A hexagonal screw head 47 housed in a large-diameter hole 39 is provided at the upper end of the bolt 46 having the number 5. A washer or a spring washer 17 receives the lower surface of the screw head 47.

In the construction floor iron plate joint having the above structure, the end side surface of the floor iron plate 48 hung by the crane to be connected is lowered while contacting the side surface of the projection 30 having the taper 28. As shown in FIG. 5, the end of the laid iron plate 48 which is to be connected is the base 2
The upper surface of 6 descends to a defined position with a gap 49 close to the position of the threaded bolt. Next, it is possible to horizontally abut the end side surface of the laid iron plate 50 hung by a crane from above the projection 31 to the side surface with the taper 29, but as shown in FIG. It is also possible to position the end portion side surface to be connected by abutting it against the side surface of the projection 31 having the taper 29 so as to be brought into contact therewith. In this state, the crane is moved away, and the cup 34 is laid over the end of the laid iron plate 48 and the end of the laid iron plate 50, and the tip of each pin 40 is placed on the upper surface of the laid iron plate 48 and the laid iron plate 50. At the same time, the upper ends of the protrusions 30 and 31 are put under the holes 43 and 43. Next, after passing the screw bolt 44 through the small diameter hole 47, the screw portion 45 is screwed into the screw hole 32, and the screw head 47 is screwed into a position where the screw head 47 is completely stored in the large diameter hole 39, and the cup 34 When tightened, the tip of each pin 40 bites into the spread iron plates 48, 50, and the spread iron plates 48, 50 are connected. From the upper side of the protrusions 30 and 31, the protrusions 3 on the side surfaces of the end portions of the other two laid iron plates to be connected.
It is also possible to connect four laid iron plates by contacting the side surfaces with the tapers 28 and 29 of 0 and 31 while descending and tightening the cup 34 with the screw bolts 44. In this embodiment, it is suitable for laying and laying an iron sheet on an inclined ground, and since a large rounded taper 35 is attached from the central portion to the peripheral portion of the upper surface of the cup 34,
When used as a joint at the corner of a construction site, it has the advantage of preventing the bulldozer grouser from hitting the joint.

[0009]

Since the present invention is constructed as described above,
It has the following effects. (1) The invention according to claim 1 can position the end of each iron plate to be connected to the upper surface of the base of the joint only by operating the crane.
Since no workers need to enter near the joint base, it never violates the above-mentioned provisions of the Occupational Safety and Health Regulations, and provides a joint for a steel sheet laying on a construction site that can be safely used any number of times. be able to. (2) According to the invention described in claim 2, the spread iron plates can be connected to each other according to the angle of the sloping ground. (3) The invention according to claim 3 has an advantage that it becomes easier for a worker to further confirm the position of the positioning protrusion integrally protruding from the base when performing the work of connecting the spread iron plates in the daytime or night. .

[Brief description of drawings]

FIG. 1 is a plan view of a joint according to a first embodiment of the present invention.

FIG. 2 is a side view of the joint.

FIG. 3 is a view showing a state in which both sides of a pin are punched in the cup of the joint.

FIG. 4 is a plan view of a joint according to a second embodiment of the present invention.

5 is a side view taken along the line AOA of FIG.

FIG. 6 is a bottom view of the base of the joint.

FIG. 7 is a side view of the base.

FIG. 8 is a plan view of the base.

FIG. 9 is a plan view of the cup of the joint.

10 is a cross-sectional view taken along the line AOA of FIG.

FIG. 11 is a bottom view of the cup.

FIG. 12 is a view showing a state in which punches are made on both sides of a pin in the cup.

FIG. 13 is a plan view of the rear end of the pin.

FIG. 14 is a side view of the pin.

[Explanation of symbols]

1 base 3, 4 taper 5, 6 protrusion 7 screw holes 9 cups 12 small diameter holes 14 Large hole 15 pin 19 screw bolts 26 base 28, 29 taper 30, 31 protrusion 32 screw holes 34 cups 35 taper 37 Small diameter hole 39 Large diameter hole 40 pin 44 screw bolt

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E01C 9/08 E04B 1/61 F16B 5/06

Claims (3)

(57) [Claims] 1. A protrusion having tapered side surfaces for positioning a laying iron plate to be connected is integrally formed from the iron plate at positions equidistant from the center of the circular or square iron plate to both sides. The base of the iron plate is provided with a screw hole in the center of the iron plate, and the center of the iron plate with the corners of the upper surface rounded is formed with a small-diameter hole through which a screw bolt is inserted. A large diameter hole for housing the head of the bolt is provided, and a steel pin is punched at a position on the lower surface of the iron plate that corresponds to the position equally spaced from each protrusion of the base on both sides. And a screw head that is stored in the large-diameter hole of the cup at the upper end of the bolt having a screw part that passes through the small-diameter hole of the cup and screwed into the screw hole of the base. Construction consisting of bolts On-site iron plate joint. 2. A protrusion having tapered side surfaces for positioning a spread iron plate to be connected is provided at a position corresponding to a position equally spaced from the center of the circular iron plate to both sides. Provided so as to integrally project from the iron plate,
In the center of the iron plate, a base provided with a screw hole,
An iron plate having a diameter larger than the diameter of the iron plate, the central part of the iron plate having a rounded taper from the middle portion of the upper surface to the peripheral portion, has a small-diameter screw hole through which a screw bolt is inserted, and a head of the screw bolt. A large-diameter hole for accommodating a portion is provided, and steel pins are provided by punching at positions corresponding to positions on the lower surface of the iron plate that are equally spaced from each of the protrusions to both sides. From a cup and a screw bolt that has a screw head that passes through a small-diameter hole of the cup and that is screwed into the screw hole of the base and has a screw head housed in the large-diameter hole of the cup at the upper end of the bolt. A joint of spread iron plates for construction sites. 3. The joint of a spread iron plate for a construction site according to claim 1 or 2, wherein the upper end surface of each protrusion provided so as to integrally project from the base is colored in a conspicuous color or a fluorescent color. A joint of a spread iron plate for a construction site, which is characterized by being applied with paint to be emitted.