JP2013256977A - Single bolt type clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a single bolt type clamp in which a body comprised of a U-shaped trunk part and both arm parts is integrally formed, for clamping a plurality of members with a bolt mounted to one arm part and a pan part formed in the another arm part, and which can comply with a certification standard even if material strength of the pan part is at a lower level than material strength of a bolt front end.SOLUTION: A fixed chip 50 is mounted to a pan part 32 formed in another arm part 30 integrally formed with a trunk part 11 of a body 10, and a plurality of members is clamped with a bolt 40 mounted in one arm part 20 integrally formed with the trunk part 11. Further, a chevron projecting part 53 is formed at a front end 52 of the fixed chip 50, and an angle of an oblique side 55 in a cross section of the chevron projecting part 53 formed with an end surface 35 of the pan part 32 is set in a range of 30° to 60°.

Description

  The present invention relates to a single-bolt clamping metal fixture that clamps a plurality of members without welding or the like when installing a work lecture stand, a support frame, or the like in building construction foundation work or the like.

  In the foundation construction of buildings, etc., when installing a work platform or support frame, etc., both arm parts that are integrally molded with the body part are used as clamping metal fittings that clamp multiple members without welding. In a U-shaped main body, both bolts are attached to both arm parts, and both bolt type clamping metal fittings that clamp a plurality of members with the two bolts, and both arms formed integrally with the body part In a U-shaped main body having a portion, there is a single-bolt type clamp that attaches a bolt to one arm portion and clamps a plurality of members with a saucer portion formed on the other arm portion.

  Since both bolt type clamping brackets clamp a plurality of members with each bolt attached to both arm portions formed integrally with the body portion of the main body, the strength of the tip of the bolt that clamps the plurality of members is The strength of the main body can be set separately so as to meet the certification standard, and the material cost can be reduced.

  On the other hand, the single-bolt clamping metal fitting is formed in the other arm part by attaching a bolt to one arm part in a U-shaped body having both arm parts integrally formed with the body part. Since a plurality of members are clamped with the saucer portion, the strength of the saucer portion needs to be the same level as the strength of the front end portion of the bolt in order to meet the certification standard. In other words, in order to conform to the certification standards, the strength of the body that is integrally molded with the saucer portion must be the same level as the strength of the bolt tip, which is higher than the strength of the body that is set by the certification standards. There was a problem that the material cost was high.

  Further, in the one-bolt type clamping metal fitting, the clamping position for clamping a plurality of members is not at the center position between the bolt and the saucer part but at a position biased toward the saucer part side. That is, since the load applied to the other arm portion on which the tray portion is formed is larger than the load applied to the one arm portion on which the bolt is attached, the durability of the other arm portion is inferior to that of the one arm portion. There was a problem with.

  The present invention has been made to solve the above-described problems, and the object of the present invention is to make the strength of the material of the tray part integrally formed with the main body lower than the strength of the material of the bolt tip part. It is also to provide a single-bolt clamp that can meet the certification standards.

  Furthermore, another object is to ensure sufficient durability of the main body even when the clamping position for clamping a plurality of members is deviated from the center position of the bolt and the saucer portion and an eccentric load is applied to the main body. It is to provide a single bolt type clamping bracket that can be used.

  In order to achieve the above object, a single bolt type clamp according to claim 1 of the present invention comprises a bolt attached to one arm part integrally formed with a body part of a main body, and an integrally formed part with the body part. In a one-bolt type clamping bracket for clamping a plurality of members with a saucer portion formed on another arm portion that is formed, a base portion of a fixed tip is attached to a recess formed in the saucer portion, and the bolt A plurality of members are clamped by the fixed chip and the fixed chip.

  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 at a tip of the fixed chip, The angle between the hypotenuse in the cross section of the chevron convex portion and the end surface of the saucer portion is set in a range of 30 degrees to 60 degrees.

  Moreover, the single bolt type clamp according to claim 3 of the present invention is the single bolt type clamp according to claim 1 or 2, wherein a material of a tip portion of the fixed tip is a tip of the bolt. It is characterized by being at the same level as the material of the part.

  Further, a 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 other bolt to which the fixed chip is mounted is provided. The arm portion is made thicker than the one arm portion to which the bolt is attached.

  Moreover, the single bolt type clamping metal fitting which concerns on Claim 5 of this invention is a single bolt type clamping metal fitting in any one of Claim 1 thru | or 4, Comprising: The said fixing to the recessed part formed in the said saucer part It is characterized by being mounted by screwing the base portion of the chip, bonding with an adhesive, press-fitting, or shrink fitting.

  In the single bolt type metal fitting according to the present invention having the above-described configuration, the fixed tip attached to the concave portion of the saucer portion formed on the other arm portion integrally formed with the trunk portion of the main body has one arm portion. Since a plurality of members are clamped with the mounted bolts, it is not necessary to set the strength of the saucer portion to the same level as the strength of the front end portion of the bolt set according to the certification standard. Therefore, the body that is molded integrally with the saucer can be molded with a material that matches the strength of the body, which is lower than the strength of the bolt tip set according to the certification standard, and the material cost is reduced. be able to.

  In addition, since the single bolt type metal fitting according to the present invention has a mountain-shaped convex portion formed at the tip of the fixed chip, the plurality of members are securely clamped when the plurality of members are clamped with the bolts. be able to. 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 saucer portion is set in the range of 30 degrees to 60 degrees, the external force that acts on the fixed chip when a plurality of members are clamped is dispersed. It is possible to prevent the fixed chip from being damaged.

  Further, in the single bolt type metal fitting according to the present invention, the fixed tip mounted in the recess formed in the tray part clamps a plurality of members with the bolt, so the material of the tip of the fixed tip is the material of the main body. It can be set separately, and by making it the same level as the material of the tip of the bolt, it can be adapted to the certification standard.

  Moreover, since the one-bolt type metal fitting according to the present invention is configured such that the other arm part on which the saucer part to which the fixed chip is attached is formed is thicker than the one arm part to which the bolt is attached. Even if the clamping position when the member is clamped is biased toward the tray part and an eccentric load is applied to the other arm part, the strength of the other arm part can be made equal to the strength of the one arm part.

  In addition, the single bolt type metal fitting according to the present invention has a fixed chip fixedly coupled by screwing, or a fixed chip fixedly bonded by an adhesive, or fixed when the fixed chip is attached to the recess formed in the tray part. Since the tip is fixedly connected by press fitting or the fixed tip is fixedly connected by shrink fitting, the fixed tip is prevented from falling out of the recess of the tray when multiple members are clamped with the fixed tip and bolt. can do.

It is a front view of the single bolt type clamping metal fitting concerning the present invention. It is a right view of the single bolt type clamping metal fitting of FIG. (1) of the fixed chip | tip which concerns on this invention is a top view, (2) is sectional drawing. 3 is a case where the fixed chip according to FIG. 3 is mounted, wherein (1) is a cross-sectional view of a recess formed in the tray part, and (2) is a cross section showing a state where the fixed chip is mounted in the recess of (1). FIG. (1) of another fixed chip | tip which concerns on this invention is a top view, (2) is sectional drawing. 5 is a case where the fixed chip according to FIG. 5 is mounted, wherein (1) is a cross-sectional view of a recess formed in the tray part, and (2) is a cross section showing a state where the fixed chip is mounted in the recess of (1). FIG. It is a front view of another one bolt type clamping metal fitting concerning the present invention. It is a right view of the single bolt type clamping metal fitting of FIG.

  Preferred embodiments of the present invention will be described below 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 right side view of the single bolt type clamp according to FIG. 1, and FIG. 1) is a plan view, (2) is a cross-sectional view, FIG. 4 is a case where the fixed chip according to FIG. 3 is mounted, (1) is a cross-sectional view of a recess formed in the saucer part, 2) is a cross-sectional view showing a state in which the fixed chip is mounted in the recess of (1).

  The single bolt type clamp 1 according to the present invention includes a main body 10, a bolt 40, and a fixed chip 50 as shown in FIG. 1.

  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 bolt 40 (to be described later) is mounted at 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 recess portion 33 in which a base portion 51 of a fixed chip 50 described later is mounted is formed in the tray portion 32. Further, as shown in FIG. 2, the other arm part 30 is formed with a thick part 34 that gradually increases from the base part 36 near the body part 11 toward the tip part 31.

  The bolt 40 is formed of a material having a strength equal to or higher than that of SCr420 defined in JIS G 4104 defined in the JIS G 4104, both of the head 41 and the shaft 42, 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 fixed chip 50 is made of a material in which a base 51 and a tip 52 for clamping a member are integrally formed, and has a strength equal to or higher than that of SCr420 defined in JIS G 4104 defined by the bolt certification standard. Molded by heat-treating high-strength materials such as SCM / SNCM materials.

  Further, a chevron convex portion 53 is formed at the tip 52, and as shown in FIG. 3, a hypotenuse 55 of the chevron convex portion 53 in a vertical section cut at a position passing through the top 54 of the chevron convex portion 53 is formed. The angle α formed with the end face 35 of the tray portion 32 when the recess 33 is not formed is preferably set in a range of 30 to 60 degrees, and more preferably set at 45 degrees.

  In the state shown in FIG. 4, the base 51 of the fixed chip 50 is mounted by being fixedly coupled to the concave portion 33 formed in the tray portion 32 of the other arm unit 30 with an adhesive or the like.

  As another method of mounting the base portion 51 of the fixed chip 50 in the concave portion 33 formed in the tray portion 32 of the other arm portion 30, a screw portion is formed in the base portion 51 of the fixed chip 50 and formed in the concave portion 33. It may be fixedly coupled by screwing with the screw part. Furthermore, the fastening margin may be secured to about 45/1000 mm, and the base 51 of the fixed chip 50 may be press-fitted into the recess 33 or may be fixedly coupled by shrink fitting.

  Moreover, the shape of the mountain-shaped convex part 53 formed in the front-end | tip part 52 of the fixed chip | tip 50 is good also as a shape shown in FIG. 5, The state which attached the fixed chip | tip 50 in this case to the other arm part 30 is As shown in FIG.

  Furthermore, as shown in FIGS. 7 and 8, the fixed chip 50 may be mounted in a recessed portion 33 that is formed in another arm portion 30.

  As described above, the single-bolt clamp 1 according to the present invention is fixed to the recess 33 formed in the tray portion 32 of the other arm portion 30 that is integrally formed with the body portion 11 of the main body 10. Since the chip 50 clamps a plurality of members with the bolt 40 attached to one arm portion 20, the material of the tip portion 43 of the bolt 40 whose strength of the material of the saucer portion 32 is defined by the certification standard. It is not necessary to have the same level of strength. Therefore, it is possible to set the main body 10 integrally formed with the saucer portion 30 separately from the material of the bolt 40, and it is possible to reduce the material cost by molding with a material having a strength adapted to the certification standard. It becomes possible.

  In addition, since the mountain-shaped convex portion 53 is formed at the distal end portion 52 of the fixed chip 50, the plurality of members can be securely clamped when the plurality of members are clamped with the bolts 40. Moreover, the angle between the hypotenuse 55 in the cross section when the mountain-shaped convex portion 53 is cut at a position passing through the top 54 and the end surface 35 of the tray portion 32 when the concave portion 33 is not formed is in the range of 30 to 60 degrees. Therefore, it is possible to disperse the external force acting on the fixed chip 50 when a plurality of members are clamped, and to prevent the fixed chip 50 from being damaged.

  In addition, since the fixed tip 50 mounted in the recess 33 formed in the tray portion 32 clamps a plurality of members with the bolts 40, the material of the tip portion 52 of the fixed tip 50 is changed to that of the tray portion 32 of the main body 10. It can be set separately from the material, and even if the material of the tip 52 of the fixed chip 50 is at the same level as the material of the tip 43 of the bolt 40, the increase in material cost can be suppressed and It becomes possible to adapt.

  In addition, the other arm portion 30 in which the tray portion 32 to which the fixed chip 50 is attached is formed has a thick portion 34 that gradually increases in thickness from the base portion 36 toward the tip portion 31. Therefore, when the plurality of members are clamped by the fixed chip 50 and the bolt 40, the clamping position is biased toward the tray part 32, and even if an eccentric load is applied to the other arm part 30, the other arm part 30 is damaged. Can be prevented.

  Further, when the fixed chip 50 is mounted in the concave portion 33 formed in the tray portion 32, a screw portion is formed in the base 51 and the concave portion 33 of the fixed chip 50 and fixedly coupled by screwing. It becomes possible not to drop out from the recess 33. In addition, since the fixed chip 50 is fixedly coupled to the concave portion 33 with an adhesive, the fixed chip 50 can be prevented from falling off the concave portion 33. Furthermore, the fastening margin is secured to about 45/1000 mm, and the fixed chip 50 is fixedly coupled to the concave portion 33 by press fitting, or the fixed chip 50 is fixedly coupled to the concave portion 33 by shrink fitting. It becomes possible not to fall off.

DESCRIPTION OF SYMBOLS 1 Single volt | bolt type clamping metal fitting 10 Main body 11 Trunk part 20,30 Arm part 21,31 Tip part 22 Bolt hole 32 Receptacle part 33 Recessed part 34 Thick part 35 End surface 36 Base part 40 Bolt 41 Head part 42 Shaft part 43, 52 Tip Part 50 Fixed chip 51 Base 53 Mountain-shaped convex part 54 Top part 55 Oblique side α Angle formed by oblique side and end face

Claims (5)

A plurality of members are clamped by a bolt attached to one arm part integrally formed with the body part of the main body and a saucer part formed on another arm part integrally formed with the body part. For single bolt type clamps,
A one-bolt type clamping bracket, wherein a base portion of a fixed tip is mounted in a recess formed in the tray portion, and a plurality of members are clamped by the bolt and the fixed tip.   A chevron-shaped convex part is formed at the tip of the fixed chip, and an angle between an oblique side of the cross-section of the chevron-shaped convex part and an end surface of the saucer part is set in a range of 30 to 60 degrees. Item 1. A single-bolt clamp according to item 1.   3. The single bolt type clamp according to claim 1, wherein the material of the tip of the fixed tip is the same level as the material of the tip of the bolt.   The one-bolt type according to any one of claims 1 to 3, wherein the other arm portion to which the fixed chip is attached is thicker than the one arm portion to which the bolt is attached. Clamp bracket. The base part of the said fixed chip | tip is screwed together in the recessed part formed in the said saucer part, it couple | bonded with the adhesive agent, it press-fitted, or it mounted | worn by shrink fitting. Single bolt type clamping bracket as described.

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