JP3182319U - Single bolt type clamp - Google Patents

Abstract

A body comprising a U-shaped body part and both arm parts is integrally formed, and a plurality of members are formed by a bolt attached to one arm part and a saucer part formed on another arm part. Provided is a single-bolt type clamp that can meet the certification standard even when the material of the saucer is lower than the strength of the material of the bolt tip when clamping.
A saucer bolt 50 is screwed into a bolt hole 33 formed in a saucer portion 32 of another arm 30 from an inner side B of the main body 10, and is screwed into a head portion 51 of the saucer bolt 50 and one arm portion 20. A plurality of members are clamped with the shaft portion 42 of the presser bolt 40 fitted together. Furthermore, a mountain-shaped convex portion 54 is formed on the end surface 53 of the head 51 of the saucer bolt 50, and the angle between the hypotenuse in the cross section of the mountain-shaped convex portion 54 and the end surface 53 of the head 51 is in the range of 30 to 60 degrees. Set.
[Selection] Figure 1

Description

  The present invention relates to a single-bolt clamp that clamps a plurality of members without welding or the like when a work lecture stand or a support rack is installed in a building construction foundation.

  Both arms that are integrally formed with the body of the main body are used as clamping brackets that clamp multiple members without welding, etc., when installing work lecture platforms or support racks in building construction foundations, etc. In a U-shaped main body having a portion, each bolt is screwed into both arm portions from the outside of the main body, and a plurality of members are clamped by the shaft portions of the two presser bolts. And a U-shaped main body having both arm portions integrally formed with the body portion of the main body, and a shaft portion of a presser bolt screwed into the bolt hole formed in one arm portion from the outside of the main body, There is a single-bolt type clamp that clamps a plurality of members with a tray part formed on another arm part.

  The double-bolt type clamping bracket clamps a plurality of members with the shaft portion of each presser bolt screwed from the outside of the main body to both arm portions formed integrally with the body portion of the main body. The strength of the shaft portion of the presser bolt to be tightened and the strength of the main body can be set separately so as to conform to the certification standard, and the material cost can be reduced.

  However, since both the presser bolt type clamps are adjusted by adjusting the presser bolts on both sides when clamping a plurality of members, the work at the time of clamping is complicated, and the shafts of the presser bolts have a plurality of members. Therefore, when a large member with a small area of the shaft portion of the presser bolt in contact with the member is clamped, the clamping strength in the twisting direction is weak.

  On the other hand, a single-bolt type clamping bracket is a U-shaped main body having both arm portions integrally formed with the body portion of the main body, and is screwed into the bolt hole formed in one arm portion from the outside of the main body. Since a plurality of members are clamped by the shaft part of the presser bolt that has been joined and the saucer part formed on the other arm part, the work at the time of clamping is easy and the area of the saucer part is large, which is large. When a member is clamped, it has a stable clamping strength in the twisting direction. However, since a plurality of members are clamped between the shaft portion and the saucer portion of the presser bolt, the strength of the saucer portion needs to be the same level as the strength of the shaft portion of the presser bolt. That is, in order to conform to the certification standard, the strength of the main body integrally formed with the saucer portion is set to the same level as the strength of the shaft portion of the presser bolt, which is higher than the strength of the main body set by the certification standard. There was a problem that it was necessary and the material cost was high. Furthermore, in order to securely clamp a plurality of members between the presser bolt and the saucer part, it is necessary to process the end surface of the saucer part integrally formed with the body part of the main body after molding, which is troublesome. There was a problem that the cost increased.

  The present invention has been made to solve the above-mentioned problems, and the object of the present invention is to determine the strength of the material of the tray part integrally formed with the body part of the main body and the material of the shaft part of the presser bolt. It is to provide a single-bolt type clamp that can meet the certification standard even at a level lower than the strength of the steel plate.

  Furthermore, another object is to provide a single-bolt clamping metal fitting that can eliminate the need for processing for securely clamping a member after integral molding to a tray part molded integrally with a body portion of a main body. That is.

  In order to achieve the above object, a one-bolt type clamp according to claim 1 of the present invention has a bolt hole formed in one arm portion integrally formed with a body portion of a main body from the outside of the main body. In the one-bolt type clamping clamp for clamping a plurality of members by a shaft portion of a screwed presser bolt and a saucer portion formed on another arm portion integrally formed with the body portion, A saucer bolt is screwed into the bolt hole formed in the body from the inside of the main body, and a plurality of members are sandwiched between the head portion of the saucer bolt and the shaft portion of the presser bolt screwed to the one arm portion. It is characterized by tightening.

  Moreover, the single-bolt type clamp according to claim 2 of the present invention is the single-bolt type clamp according to claim 1, wherein a mountain-shaped convex portion is formed on the end face of the head of the saucer bolt. It is characterized by this.

  Moreover, the single bolt type clamp according to claim 3 of the present invention is the single bolt type clamp according to claim 2, wherein the hypotenuse in the cross section of the mountain-shaped convex portion is the end face of the head. The angle formed is set in the range of 30 degrees to 60 degrees.

  Moreover, the single-bolt type clamp according to claim 4 of the present invention is the single-bolt type clamp according to any one of claims 1 to 3, wherein the tray part is integrally formed with the body part. The curved surface due to the draft angle formed on the surface is corrected, and the end surface of the tray portion is a flat surface.

  Further, a single bolt type clamp according to claim 5 of the present invention is the single bolt type clamp according to any one of claims 1 to 4, wherein a boundary between the head and the shaft portion of the saucer bolt is provided. A reinforcing portion is formed on the surface.

  Moreover, the single bolt type clamp according to claim 6 of the present invention is the single bolt type clamp according to any one of claims 1 to 5, wherein the material of the head of the saucer bolt is the above. It is characterized by the same level as the material of the shaft part of the presser bolt.

  The single-bolt type clamping bracket according to the present invention having the above-described configuration is configured such that a saucer bolt is screwed into a bolt hole formed in the saucer portion from the inside of the main body, and the head of the saucer bolt and the one arm Since the plurality of members are clamped with the shaft part of the presser bolt screwed to the part, the strength of the material of the saucer part is at the same level as the material strength of the shaft part of the presser bolt set according to the certification standard There is no need to do. Therefore, the body part and both arm parts of the body that are integrally molded with the saucer part are molded with a material that conforms to the strength of the body, which is lower than the strength of the shaft part of the presser bolt set according to the certification standard. And material costs can be reduced. Furthermore, it is possible to eliminate the need for processing for securely clamping the member after integral molding in the tray portion that is integrally molded with the body portion of the main body, thereby reducing processing costs.

  In addition, the single bolt type clamp according to the present invention is configured such that a saucer bolt is screwed into a bolt hole formed in the saucer part from the inside of the main body, and is screwed into the head part of the saucer bolt and the one arm part. Since the plurality of members are clamped with the shaft part of the presser bolt that has been joined, the adjustment when clamping the plurality of members is made with a single presser bolt, and the work is easy, and contact with the member Since the area of the head of the receiving bolt is large, even if a large member is clamped, it is possible to have a stable clamping strength in the twisting direction.

  In addition, since the single-bolt type clamping bracket according to the present invention has a chevron-shaped convex portion formed on the head of the saucer bolt, the plurality of members can be reliably secured when clamping the plurality of members with the holding bolt. Can be clamped. In addition, since the angle formed by the hypotenuse in the cross section of the mountain-shaped convex portion with the end face of the head is set in the range of 30 to 60 degrees, the external force acting on the head of the saucer bolt when a plurality of members are clamped It can disperse | distribute and can prevent the damage | damage of the head of a saucer bolt.

  In addition, the single bolt type clamping bracket according to the present invention has a reinforcing part formed at the boundary between the head part of the saucer bolt and the shaft part, so that a bending moment acts on the saucer bolt and the head where stress is concentrated. Breaking from the boundary of the shaft portion can be prevented.

  In addition, the one-bolt clamping metal fitting according to the present invention has a flat surface obtained by correcting a curved surface due to a draft formed in a saucer portion integrally formed with the body portion, and is thus screwed into the saucer portion. It is possible to prevent a bending moment from acting on the saucer bolt.

  In addition, the single bolt type clamp according to the present invention is configured such that a saucer bolt is screwed into a bolt hole formed in the saucer part from the inside of the main body, and is screwed into the head part of the saucer bolt and the one arm part. Since multiple members are clamped with the shaft part of the presser bolt, the material of the head part of the pan bolt is set at the same level as the material of the shaft part of the presser bolt, separately from the body material, and certified. It can be adapted to the standards.

It is a front view of the single bolt type clamping metal fitting concerning the present invention. It is a vertical sectional view of the bolt hole formed in the other arm of FIG. (1) of the saucer volt | bolt which concerns on this invention is a left view, (2) is a front view, (3) is sectional drawing. It is a vertical sectional view of a state in which the saucer bolt according to the present invention is screwed into the bolt hole, (1) when the bolt shown in FIG. 3 is screwed, (2) screwed another saucer bolt. Is the case. It is a front view of another saucer bolt concerning the present invention. It is a horizontal sectional view which shows the state which screwed the saucer volt | bolt shown in FIG. 3 in the bolt hole formed in the saucer part of another shape.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the drawings. However, the scope of the present invention is not intended to be limited to the contents described in this embodiment unless otherwise specified.

  FIG. 1 is a front view of a single bolt type clamp according to the present invention, FIG. 2 is a vertical sectional view of a bolt hole formed in another arm of FIG. 1, and FIG. 3 is a saucer according to the present invention. (1) of the bolt is a left side view, (2) is a front view, (3) is a sectional view, and FIG. 4 is a state in which the saucer bolt according to the present invention is screwed into the bolt hole shown in FIG. FIG. 5 is a vertical sectional view, (1) is a case where the bolt shown in FIG. 3 is screwed, (2) is a case where another saucer bolt shown in FIG. 5 is screwed, and FIG. FIG. 6 is a front view of a saucer bolt different from 3, and FIG. 6 is a diagram showing a screwed bolt bolt formed in a saucer portion having a curved surface with a draft angle different from FIG. 1. It is a horizontal sectional view of the state

  As shown in FIG. 1, the one-bolt type clamp 1 according to the present invention includes a main body 10, a presser bolt 40, and a receiving bolt 50.

  The main body 10 is composed of a trunk portion 11 and both arm portions (20, 30) formed integrally with the trunk portion 11, and is equal to or more than S35C defined in JIS G 4051 defined by the certification standards. It is formed by hot forging using mechanical structural steel having strength and the like. The accreditation standard is the “crimping standard for clamps” established by the Temporary Industrial Association based on the commission of the Ministry of Health, Labor and Welfare and enacted on January 1, 1994.

  One arm portion 20 of both arm portions (20, 30) formed integrally with the body portion 11 is formed with a bolt hole 22 into which a presser bolt 40 (to be described later) is screwed to the distal end portion 21. In addition, a tray portion 32 is formed at the distal end portion 31 of the other arm portion 30, and a bolt hole 33 into which a tray bolt 50 described later is screwed is formed in the tray portion 32. In addition, since the end surface 34 of the saucer portion 32 is a curved surface due to a draft when integrally formed with the body portion 11, the end surface 34 is processed to be flat so as to be in close contact with the head 51 of the saucer bolt 50. Yes. Further, as shown in FIG. 2, an inclined portion 35 corresponding to the reinforcing portion 57 of the saucer bolt 50 is formed at the inlet portion of the bolt hole 33.

  The presser bolt 40 is screwed into a bolt hole 22 formed in one arm portion 20 from the outer side A of the main body 10. Both the head 41 and the shaft 42 of the presser bolt 40 are formed of a material having a strength equal to or higher than that of SCr420 defined in JIS G 4104 defined by the certification standard, and the tip of the shaft 42 that clamps the member. The portion 43 is hardened to HRA75 or higher by heat treatment to ensure strength and wear resistance.

  The saucer bolt 50 is screwed into the bolt hole 33 formed in the saucer part 32 of the other arm part 30 from the inner direction B of the main body 10. As shown in FIG. 3, a chevron convex portion 54 is formed on the end surface 53 of the head 51 of the saucer bolt 50, and the chevron convex portion in a vertical section cut at a position passing through the top 55 of the chevron convex portion 54. The angle α formed by the oblique side 56 of the head 54 and the end face 53 of the head 51 is preferably set in the range of 30 to 60 degrees, more preferably in the range of 40 to 50 degrees. . Furthermore, a reinforcing portion 57 whose inner diameter gradually decreases from the head portion 51 toward the shaft portion 52 is formed at the boundary between the head portion 51 and the shaft portion 52. FIG. 4A shows a state in which the tray bolt 50 is screwed into the bolt hole 33 formed in the other arm portion 30 described above.

  As for the material of the receiving bolt 50, both the head 51 and the shaft 52 are formed of a material having a strength equal to or higher than that of the SCr420 defined in JIS G 4104, which is defined by the certification standards, like the presser bolt 40, and a plurality of members The head 51 for clamping is hardened to HRA75 or higher by heat treatment to ensure strength and wear resistance.

  In addition, as shown in FIG. 5, the saucer volt | bolt 50 may be a case where the reinforcement part is not formed. In this case, since the end surface 34 of the saucer portion 32 is processed to be a flat surface, as shown in FIG. 4 (2), the shaft portion side end surface 58 of the head 51 of the saucer bolt 50 is provided on the other arm portion 30. The end surface 34 of the tray portion 32 is in close contact with the end portion 34.

  In the case where the reinforcing portion 57 is formed on the saucer bolt 50, as shown in FIG. 6, when the bolt is formed in the bolt hole 33 formed in the saucer portion 32 having a curved surface with a draft angle, the saucer bolt 50 is provided. A gap is formed between the shaft-side end surface 58 of the head 51 and the end surface 34 of the saucer portion 32, but since the reinforcing portion 57 is formed, a bending moment is unlikely to act on the saucer bolt 50. ing.

  As described above, the single-bolt clamp 1 according to the present invention includes a plurality of the head 51 of the saucer bolt 50 and the shaft 42 of the presser bolt 40 that are screwed into the bolt holes 33 formed in the saucer 32. Therefore, the strength of the material of the tray part 32 molded integrally with the main body 10 can be made lower than the strength of the material of the shaft part 42 of the presser bolt 40 set according to the certification standard, Material costs can be reduced. Further, the receiving part 32 formed integrally with the main body 10 does not need to be processed for surely clamping the member to be performed after the integrated forming, and the processing cost can be reduced.

  Further, since the plurality of members are clamped by the head 51 of the saucer bolt 50 and the shaft portion 42 of the presser bolt 40, it is possible to adjust only the presser bolt 40 when clamping the plurality of members. Therefore, the work is facilitated, and the area of the head 51 of the saucer bolt 50 that comes into contact with the member is large. Therefore, even when a large member is clamped, it is possible to have a stable clamping strength in the twisting direction.

  Further, a convex portion 54 is formed on the head 51 of the saucer bolt 50, and the angle α between the hypotenuse 56 in the cross section of the convex portion 54 and the end surface 53 of the head 51 is in the range of 30 to 60 degrees. Therefore, it is possible to disperse the external force acting on the head 51 of the saucer bolt 50 when a plurality of members are clamped, and to prevent the saucer bolt 50 from being damaged.

  Further, since the reinforcing portion 57 is formed at the boundary between the head portion 51 and the shaft portion 52 of the saucer bolt 50, a bending moment acts even when screwed into the saucer portion 32 having a curved surface formed by a draft angle. Even if a bending moment acts on the saucer bolt 50, it can be prevented from being broken.

  Further, when the curved surface due to the draft formed in the saucer portion 32 is corrected and formed into a flat surface by being molded integrally with the body portion 11, it is screwed with the bolt hole 33 formed in the saucer portion 32. Even if no reinforcing part is formed on the receiving bolt 50, the shaft side end surface 58 of the head 51 of the receiving bolt 50 is in close contact with the end surface 34 of the receiving tray 32, so that the receiving bolt 50 is bent. It is possible to prevent the moment from acting.

DESCRIPTION OF SYMBOLS 1 Single-bolt type clamping metal fitting 10 Main body 11 Trunk part 20, 30 Arm part 21, 31 Tip part 22, 33 Bolt hole 32 Receptacle part 34, 53, 58 End face 35 Inclined part 40 Pressing bolt 41, 51 Head part 42, 52 Shaft part 43 Tip part 50 Receptacle bolt 54 Mountain-shaped convex part 55 Top part 56 Slope side 57 Reinforcement part α

Claims (6)

A shaft portion of a presser bolt screwed from the outside of the main body into a bolt hole formed in one arm portion integrally formed with the body portion of the main body, and another arm integrally formed with the body portion In the single bolt type clamping bracket that clamps a plurality of members with the saucer part formed in the part,
A plurality of members are formed by screwing a saucer bolt into the bolt hole formed in the saucer portion from the inside of the main body, and a head portion of the saucer bolt and a shaft portion of the presser bolt screwed into the one arm portion. A single-bolt clamping bracket characterized by clamping a bolt.   The one-bolt type clamping bracket according to claim 1, wherein a chevron-shaped convex portion is formed on an end surface of a head portion of the tray bolt.   The single-bolt type clamp according to claim 2, wherein an angle formed by a hypotenuse in the cross section of the mountain-shaped convex portion with an end face of the head is set in a range of 30 to 60 degrees.   The piece according to any one of claims 1 to 3, wherein a curved surface due to a draft formed in the tray portion integrally formed with the body portion is corrected, and an end surface of the tray portion is a flat surface. Bolt type clamp.   The one-bolt type clamping bracket according to any one of claims 1 to 4, wherein a reinforcing portion is formed at a boundary between the head portion and the shaft portion of the tray bolt. The single bolt type clamp according to any one of claims 1 to 5, wherein a material of a head of the tray bolt is the same level as a material of a shaft portion of the presser bolt.

Images