JP2012246601A - Screw tightening device for construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily fit a screw tightening device for construction.SOLUTION: A screw rod 5 having first and second nuts 6, 39 coupled to front and rear-end male screw parts 5a, 5b is coupled to a lock plate 8 through a guide cylinder 37, a compression coil spring 10 is interposed between the guide cylinder and the second nut threadably engaging the screw rod, and while the lock plate is locked to a member 1 for construction, the screw rod is locked to the member 2 for construction through the first nut. The first nut is tightened to mutually fix members for construction, and the first nut is tightened to compress the compression coil spring by a compression amount substantially equal to a shrinkage amount accompanying secular change of the members for construction. The rear-end side male screw part of the screw rod has the number of turns provided more than the number of turns corresponding to the compression amount of the compression coil spring as compared with the number of turns of the front-end side male screw part of the screw rod, and the second nut is provided with a slide contact surface 39a coming into contact with a plate surface 8b of the lock plate so as to compress the compression coil spring by the compression amount together with the guide cylinder in a state in which the second nut is stopped from rotating as the first nut and screw rod rotate.

Description

  The present invention relates to a building screw fastening device for joining building members such as columns and beams.

  Conventionally, joining means such as columns, mortises and mortises are used to join building members such as columns and beams, and a joint called a hago plate is used to make the joining more reliable. It is done. Hago plate is a screw rod with a locking plate welded. For example, when a beam and a beam are joined together by a dovetail groove, a hole is made in the beam on the dovetail side and the screw rod is inserted into this hole. Then, the locking plate is attached to the side of the beam on the dovetail side and fixed with a nail or the like, and the beams are tightened by screwing a nut into a screw rod penetrating the dovetail groove sideways. When joining a beam to a column, make a hole in the column sideways, insert a screw rod through this hole, attach a locking plate to the side of the beam and fix it with a nail, etc. The nuts are screwed together to tighten the beams and columns.

  However, when building members such as beams are joined together using conventional boards, bolts, etc., the tightening force by bolts, etc. is weakened due to shrinkage due to secular deformation of wood, for example, shrinkage due to drying. There is a risk that the strength of the steel will decrease. In general, rattling has already been observed from June to 1 year after construction. In addition, since the board is usually used in an amount of 100 to 150 pieces / 30 tsubo, almost all of these are considered to loosen, the building becomes fragile with respect to the torsional force around the vertical axis. It tends to collapse due to wind.

  In view of this, the present inventor has connected the screw rod to the locking plate via the guide tube, the first nut is screwed to the front-end male screw portion of the screw rod, and the rear end-side male screw of the guide tube and the screw rod. A compression coil spring is interposed between the second nut screwed into the screw portion, the locking plate is locked to one of the building members, and the screw rod is interposed between the front end male screw portion and the first nut. The other building member is locked and the first nut is tightened to fix one building member to the other building member. By tightening the second nut, the compression coil spring is used for building. There has been proposed a building screw fastening device that is compressed to the same extent or more than the amount of shrinkage accompanying the aging of the member (see Patent Document 1). It was confirmed that the strength of the house was increased and the earthquake resistance was improved by using this building screwing device.

Japanese Patent No. 2801854

  However, when the first nut is tightened with an impact wrench or the like to compress the compression coil spring, the screw rod rotates together with the rotation of the first nut. Accordingly, there is a problem that the second nut also rotates. When the second nut rotates together with the screw rod, the compression coil spring is not compressed, and even if it is compressed, the compression becomes insufficient, and the vibration resistance cannot be imparted.

  Therefore, conventionally, an operator operates the impact wrench or the like with one hand to rotate the first nut, and the other hand operates the spanner to fix the second nut so as not to turn.

  However, this operation is very troublesome because it requires both hands of the operator and requires a large amount of force. Further, since the compression coil spring has a large spring constant, the compression amount of the compression coil spring may be insufficient.

  Moreover, in the conventional architectural screw fastening device, since the screw rod is placed directly on the plate surface of the locking plate and welded, the distance between the screw rod and the locking plate is small. The second nut attached to the rear end threaded portion must also be naturally reduced. As a result, the compression coil spring may become unstable.

  The object of the present invention is to solve the above problems.

  In order to solve the above problems, the present invention employs the following configuration.

  In order to facilitate understanding of the present invention, reference numerals in the drawings are given in parentheses, but the present invention is not limited thereto.

  That is, in the invention according to claim 1, the screw rod (5) in which the first nut (6) and the second nut (39) are respectively screwed into the male screw portions (5a, 5b) at the front and rear ends includes the guide cylinder. The compression coil spring (10) is connected to the locking plate (8) through (37), and between the guide tube (37) and the second nut (39) screwed into the screw rod (5). Is interposed, the locking plate (8) is locked to one building member (1, 17), and the screw rod (5) is connected to the other building via the first nut (6). The one building member (1, 17) is fixed to the other building member (2, 18) by being locked to the member (2, 18) and tightening the first nut (6). In addition, the compression coil spring (10) is fixed to the building member (1, 2, 17) by tightening the first nut (6). 18) The screw tightening device for building that is compressed by a compression amount equivalent to or larger than the contraction amount accompanying the secular deformation of 18), wherein the male screw portions (5a, 5a, In 5b), the number of turns of the rear end side male screw part (5b) corresponds to the amount of compression of the compression coil spring (10) rather than the number of turns of the front end side male screw part (5a) of the screw rod (5). The second nut (39) is provided with a sliding contact surface (39a) that contacts the plate surface (8b) of the locking plate (8). With the rotation of the one nut (6) and the screw rod (5), the compression nut spring (10) together with the guide tube (37) is moved by the amount of compression while the second nut (39) is prevented from rotating. Adopt architectural screw tightening device that can be compressed

  As described in claim 2, in the screw tightening device for building according to claim 1, the locking plate (8) is provided with a raised portion (8a), and the guide is provided on the raised portion (8a). The cylinder (37) can be placed thereon.

  According to the present invention, even if the building member made of wood contracts with aging, the compression coil spring (10) gradually recovers elastically in response to the contraction, so the screw rod (5) and nut (6, 39), the fastening force between the building members such as beams and beams, beams and columns, beams and locking plates, wood and concrete, etc. is maintained. Of course, the male screw portions (5a, 5b) at the front and rear ends of the screw rod (5) are behind the number of turns of the front male screw portion (5a) of the screw rod (5). The end male screw portion (5b) is formed so that the number of turns is larger than the number of turns corresponding to the compression amount of the compression coil spring (10), and the second nut (39) is provided with the locking plate. The sliding surface (39a) that contacts the plate surface (8b) of (8) is provided. Thus, with the rotation of the first nut (6) and the threaded rod (5), the compression coil spring (10) is moved to the guide tube (37) while the second nut (39) is prevented from rotating. At the same time, when the construction screw tightening device is attached, the first nut (6) is turned with an impact wrench or the like, and the second nut (39) is released. The compression coil spring (10) can be compressed. Therefore, it is possible to simply, quickly and accurately perform the installation work of the building screw fastening device.

  In the present invention, when the raised portion (8a) is provided on the locking plate (8) and the guide tube (37) is placed on the raised portion (8a), the screw rod ( The distance between 5) and the locking plate (8) is increased, so that the compression coil spring (10) can be more stably compressed with the second nut (39) being larger.

It is a partial notch top view of the building screw fastening apparatus which concerns on this invention. FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 1. It is a disassembled perspective view of the building screw fastening apparatus which concerns on this invention. It is a perspective view after the assembly of the building screw fastening apparatus. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6. It is a disassembled perspective view in the other usage example of the screw fastening apparatus for buildings which concerns on this invention. It is a perspective view after the assembly of the building screw fastening apparatus.

  Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings.

  In FIG. 5 thru | or FIG. 6, the codes | symbols 1 and 2 each show the beam which consists of timber which is a building member of a building. There is a dovetail 3 at the end of one beam 1, a dovetail groove 4 is formed in the middle of the other beam 2, and there is a dovetail 3 inserted into the groove 4 so that one beam 1 becomes the other It is joined to the beam 2 so that it cannot be pulled out.

  The building screw tightening device 36 shown in FIGS. 1 to 3 is attached to the joint portion.

  The architectural screw fastening device 36 includes a screw rod 5 in which a first nut 6 and a second nut 39 are respectively engaged with male screw portions 5a and 5b at the front and rear ends, and the screw rod 5 is slidably inserted. And a metal locking plate 8 to which the guide cylinder 37 is fixed by welding or the like.

  The locking plate 8 is a rectangular metal plate, and a raised portion 8a is formed on the front end side thereof by press molding or the like. The upper surface of the raised portion 8 a is a concave surface that can match the side surface of the guide tube 37. A hole 41 through which the bolt 9 is passed is provided on the rear end side of the locking plate 8.

  The guide cylinder 37 is a metal cylinder, and is placed on the raised portion 8a of the locking plate 8 so that its axial center coincides with the longitudinal direction of the locking plate 8, and is fixed by welding or the like. A clearance is provided between the hole of the guide tube 37 and the screw rod 5 passed therethrough.

  The screw rod 5 inserted through the guide tube 37 protrudes forward from the top of the locking plate 8. The first nut 6 is screwed into the front end side male screw portion 5 a of the screw rod 5 protruding from the guide tube 37. A washer 11 is applied to the first nut 6 as necessary.

  The rear end side of the screw rod 5 remains on the locking plate 8, and the second nut 39 is screwed into the male screw portion 5b on the rear end side.

  A compression coil spring 10 is interposed between the second nut 39 and the guide tube 37 in the screw rod 5. The compression coil spring 10 is formed by winding a linear spring material having a square cross section a plurality of times, and both ends thereof are formed thin so that the compression coil spring 10 is cylindrical when compressed. Both ends are in contact with adjacent winding portions so as to be easily inserted between the guide tube 37 and the second nut 39. The cross-section of the linear spring material is not limited to a quadrangle, but may be another shape such as a circle.

  As shown in FIGS. 1 and 2, in the screw rod 5, the spiral of the rear end side male screw portion 5b is formed so that the number of turns is larger than that of the front end side male screw portion 5a. Specifically, the number of turns of the rear end side male screw portion 5b is set to be greater than the number of turns corresponding to the compression amount of the compression coil spring 10 than the number of turns of the front end side male screw portion 5a. This compression amount is desirably the maximum compression amount of the compression coil spring 10. Further, as shown in FIGS. 5 and 6, the compression amount is such that the beam 1 as one building member is fixed to the beam 2 as the other building member and the first nut 6 is tightened. Thus, the compression coil spring 10 has a compression amount that is the same as or larger than the amount of contraction accompanying the aging deformation of the building member.

  As shown in FIGS. 1 to 4, the second nut 39 is provided with a flat sliding contact surface 39 a that contacts a flat surface 8 b that is a front side plate surface of the locking plate 8. The sliding contact surface 39a does not necessarily have to be a flat surface. In short, it should be a surface that can contact the locking plate 8 to prevent the rotation of the second nut 39 and slide on the locking plate 8. That's fine.

  As a result, as shown in FIGS. 6 and 7, the first nut 6 is turned in a state where the first nut 6 and the locking plate 8 are restrained in place, and the front end side male screw portion 5a is moved over the first nut 6a. When the screw rod 5 is further rotated after being screwed to the end of the spiral, the screw rod 5 rotates together with the first nut 6. At that time, the flat sliding contact surface 39a of the second nut 39 is in surface contact with the flat surface 8b of the locking plate 8 and the sliding contact surface 39a slides on the flat surface 8b. Screws toward the guide tube 37 in a state where the rotation is stopped despite the rotation of the screw rod 5. As a result, the compression coil spring 10 is compressed between the second nut 39 and the guide cylinder 37 by a desired compression amount.

  Next, the operation of the building screw fastening device 36 will be described with reference to FIGS.

  As shown in FIGS. 5 to 7, in order to increase the joining force between the beams 1 and 2, the building screw fastening device 36 is attached to the joining portion of the beams.

  That is, a hole 7 is opened laterally in the beam 2 on the dovetail side, and the screw rod 5 is inserted into the hole 7. At this time, the screw rod 5 is inserted into the guide tube 37. Further, a locking plate 8 is applied to the side surface of the beam 1 on the side, and is locked and fixed with a bolt 9 or the like.

  The front-end male screw portion 5a of the screw rod 5 penetrates the beam 2 on the dovetail groove sideways, and the first nut 6 is screwed to the front-end male screw portion 5a protruding from the beam 2 via the washer 11. The A second nut 39 is screwed onto the rear end side male screw portion 5 b of the screw rod 5.

  When the first nut 6 is rotated in the tightening direction by an impact wrench or the like (not shown), the first nut 6 is screwed on the front end side male screw portion 5a to the end of the spiral, and the washer 11 together with the washer 11 It contacts the side surface and simultaneously stops relative to the threaded rod 5. When the first nut 6 continues to be turned even after the stop, the screw rod 5 rotates together with the first nut 6 at a fixed position. During this rotation, the sliding contact surface 39a of the second nut 39 is in surface contact with the flat surface 8b of the locking plate 8, and the sliding contact surface 39a slides on the flat surface 8b. The second nut 39 is screwed toward the guide tube 37 in a state where the rotation is stopped despite the rotation of the screw rod 5. As a result, the compression coil spring 10 is compressed by a desired amount of compression between the second nut 39 and the guide tube 37, and is elastically deformed as shown in FIG.

  As a result, the engagement force between the dovetail 3 and the dovetail groove 4 is increased, and the beams 1 and 2 are tightened by the amount of compression of the compression coil spring 10. The amount of compressive deformation of the compression coil spring 10 is about the same as or larger than the amount of contraction accompanying the secular deformation of the beams 1 and 2 made of wood, and is about 3 mm to 5 mm, for example. As a result, even if the beams 1 and 2 are contracted due to aging, the compression coil spring 10 is elastically restored little by little according to the contraction, and the tightening force by the screw rod 5 and the first and second nuts 6 and 39 is increased. Maintained. Therefore, the gap between the dovetail 3 and the dovetail groove 4 is also eliminated, the fastening state between the beams 1 and 2 is maintained, and the strength of the building is maintained.

  As shown in FIGS. 5 to 7, the locking plate 8 has a hole 13 formed in the beam 1, a bolt 9 is passed through the hole 1, and a nut 14 is tightened. May be. Or you may use together. Further, a rubber elastic washer 15 and a metal washer 16 are interposed between the nut 14 and the recessed portion 34 of the beam 1, and the amount of contraction due to drying or the like of the beam 1 is anticipated or the same as the amount of contraction. If the elastic washer 15 is compressed more, the locking plate 8 can be more suitably prevented from loosening and rattling.

  In addition, the building screw fastening device can be used in the form shown in FIGS. 8 and 9.

  8 and 9, reference numerals 17 and 18 denote beams and columns made of wood, which are building members of the building, respectively. A mortise 19 is formed at the end of the beam 17, and a mortise (not shown) is formed in the middle of the column 18. The mortise 19 is inserted into the mortise so that the beam 17 becomes the column 18. It is joined.

  In order to increase the bonding force between the beam 17 and the column 18, the building screw fastening device 36 is attached to the joint portion.

  That is, a hole 22 is formed in the column 18 in the lateral direction, and the screw rod 5 is inserted into the hole 22. Then, the locking plate 8 is applied to the side surface of the beam 17 and is locked by a bolt 24 or the like. The front male screw portion 5a of the screw rod 5 penetrates the column 18 sideways, and a metal washer 11 and a first nut 6 are attached to the penetrating portion, and the first nut 6 is attached to the front male screw portion 5a. Screwed. In addition, the compression coil spring 10 is inserted into the rear end side male screw portion 5b of the screw rod 5 passing through the guide tube 37 rearward, and finally the second nut 39 is screwed.

  A recessed portion 27 that houses the metal washer 11, the first nut 6, and the like is provided at a location where the compression coil spring 10 and the like in the column 18 are applied.

  Therefore, when the first nut 6 screwed into the distal male screw portion 5a is rotated in the tightening direction, the engagement force between the tenon 19 and the tenon hole is increased, and the beam 17 and the column 18 are tightened. When the first nut 6 is tightened, the compression coil spring 10 is compressed and elastically deformed between the guide tube 37 and the second nut 39. The amount of compression is the same as that shown in FIGS. Degree. Thereby, even if the beam 17 or the column 18 contracts due to drying or the like, the compression coil spring 10 is elastically restored little by little according to the contraction amount, so that the screw rod 5, the first nut 6, the second nut 39, etc. The tightening force by is maintained. Therefore, the gap between the mortise 19 and the mortise is also eliminated, the fastening state between the beam 17 and the column 18 is maintained, and the strength of the building is maintained.

  In addition, although the said locking plate 8 was fixed to the beam 17 with the volt | bolt 24, it is also possible to fix to the beam 17 using the said building screw fastening apparatus.

DESCRIPTION OF SYMBOLS 1, 2 ... Beam 5 ... Screw rod 5a ... Front end side male screw part 5b ... Rear end side male screw part 6 ... First nut 8 ... Locking plate 8a ... Raised part 8b ... Plate surface 10 ... Compression coil spring 17 ... Beam 18 ... pillar 37 ... guide tube 39 ... second nut 39a ... sliding contact surface

Claims (2)

  A screw rod in which a first nut and a second nut are screwed to the male screw portions at the front and rear ends is connected to a locking plate via a guide tube, and the second screw screwed to the guide tube and the screw rod. A compression coil spring is interposed between the nut and the locking plate, the locking plate is locked to one building member, and the screw rod is locked to the other building member via the first nut, By tightening the first nut, the one building member is fixed to the other building member, and by tightening the first nut, the compression coil spring is deformed over time with respect to the building member. In the architectural screw tightening device that is compressed by a compression amount equivalent to or greater than the contraction amount accompanying the above, the male screw portion at the front and rear ends of the screw rod is the front end side male screw portion of the screw rod The number of turns of the rear end side male screw part is more than the number of turns of The number of turns corresponding to the compression amount of the compression coil spring is increased, and the second nut is provided with a sliding contact surface that contacts the plate surface of the locking plate, whereby the first nut and The architectural screw tightening apparatus, wherein the compression coil spring can be compressed together with the guide tube by the compression amount with the rotation of the screw rod and the second nut being prevented from rotating.   2. The architectural screw tightening device according to claim 1, wherein a raised portion is provided on the locking plate, and the guide tube is placed on the raised portion.

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