JP2022161198A - Packing - Google Patents

Abstract

To provide a packing having high versatility, and easy to construct.SOLUTION: A packing 1 is fitted at a part between a wall body (bearing wall 2) inserted with a tie-rod 3 and a nut 6 fitted to the tie-rod 3, and has: an inner cylindrical member 10 inserted with the tie-rod 3 therethrough and formed with a male screw part 11 on an outer circumferential part; an outer cylindrical member 30 inserted with the inner cylindrical member 10 and formed with a female screw part 31 to be screwed with the male screw part 11 on an inner cylindrical part; and energizing means 50 energizing torque for relatively rotating the other with respect to one of the inner cylindrical member 10 and the outer cylindrical member 30. The inner cylindrical member 10 allows the insertion of the tie-rod 3 in a non-locked state, and the energizing means 50 energizes the torque in a direction of the inner cylindrical member 10 projecting from the outer cylindrical member 30.SELECTED DRAWING: Figure 1

Description

The present invention relates to packing.

As a technique for preventing lifting of load-bearing walls in wooden buildings, it is common to install hold-down metal fittings on the legs of the load-bearing walls and tie the columns to the foundation and the columns of the lower floors.

However, in recent years, with the increase in the strength of load-bearing walls and the shift to middle-rise wooden buildings, the pull-out force acting on the edge of load-bearing walls during typhoons and earthquakes has increased. It may not be possible to prevent the lifting of the

As a countermeasure for such a problem, a method of installing tie rods so as to penetrate multiple floors from the lowest floor can be considered. In this method, tie rods are inserted into through-holes drilled in the upper and lower frames and beams of each story, and the tie rods are tightened and fixed to the beams of each story with nuts to distribute and support the pull-out force. .

By the way, in wooden buildings, it is known that the entire building subsides because the wood of the pillars and beams shrinks over time due to drying, and the gaps between members shrink due to vertical load. It is also known that the amount of subduction is greater in middle-rise buildings than in low-rise buildings. Therefore, when tie rods are used in middle-rise buildings, a large gap is created between the nut and the beam (specifically, the steel plate placed on the beam) due to the shrinkage of the wood, etc. There is a possibility that the uplift prevention function of the load-bearing wall cannot be exhibited and the uplift of the bearing wall due to an earthquake or the like cannot be prevented.

Therefore, many techniques have been developed and put to practical use to prevent the tie rods from rising even when the wood material shrinks.

For example, Patent Document 1 discloses a coupler that connects the ends of a pair of vertically divided tie rods, in which an outer cylindrical member to which one tie rod is connected and the other tie rod are connected, An inner cylinder member that is rotatably inserted into the cylinder member and moves along the axial direction of the outer cylinder member, and an elastic member that rotationally biases the inner cylinder member in the insertion direction with respect to the outer cylinder member . The outer cylindrical member has a first female threaded portion formed on the inner peripheral surface, and the inner cylindrical member has a first male threaded portion formed on the outer peripheral surface and screwed into the first female threaded portion of the outer cylindrical member. and a second female threaded portion formed on the inner peripheral surface and into which a second male threaded portion formed on the outer peripheral surface of the other tie rod is screwed. In such a coupler, when the wood shrinks or the like occurs, the inner cylindrical member rotates and relatively moves toward the outer cylindrical member due to the biasing force of the elastic member, and is pulled into the outer cylindrical member. . Further, with the relative movement of the inner cylinder member, the other tie rod relatively moves toward the inside of the outer cylinder member and is pulled into the outer cylinder member. As a result, the tie rod can be prevented from being lifted due to the shrinkage of the wood.

JP 2014-20423 A

However, in the coupler described in Patent Document 1, the tie rod is divided into upper and lower parts, and each tie rod must be attached to each of the outer cylinder member and the inner cylinder member, which requires a lot of work and time. . In addition, it is necessary to prepare an outer cylinder member and an inner cylinder member according to the outer diameter of the tie rod, resulting in low versatility.

The present invention was invented from such a point of view, and an object of the present invention is to provide a packing that has high versatility and can be easily applied.

In order to solve the above-described problems, the present invention provides a packing that is mounted between a wall through which a tie rod is inserted and a nut that is mounted on the tie rod, the packing having the tie rod inserted inside and a male packing on the outer circumference. an inner cylindrical member having a threaded portion; an outer cylindrical member through which the inner cylindrical member is inserted and having a female threaded portion into which the male threaded portion is screwed on an inner peripheral portion thereof; an urging means for urging a rotational force to relatively rotate one of the outer cylinder members with respect to the other, wherein the inner cylinder member allows the tie rod to pass through in an unlocked state, and the urging means It is characterized in that the inner cylinder member applies a rotational force in a direction of protruding from the outer cylinder member.

According to the packing of the present invention, the gap between the nut and the wall or the like (specifically, the steel plate on the wall side) increases when the wood of the wall or the like dries and shrinks. Since the cylindrical member is rotated relative to the outer cylindrical member to protrude the inner cylindrical member from the outer cylindrical member, the packing expands as the gap increases. As a result, the looseness of the nut can be eliminated, and the wall is securely fixed. In addition, since such a packing can be mounted on a wall body, the tie rod can be inserted through the inside in an unlocked state, and the nut 6 can be tightened, installation is easy. Furthermore, if the outer diameter of the tie rod is smaller than the inner diameter of the inner cylindrical member, tie rods with a plurality of diameters can be used, increasing versatility.

In the packing of the present invention, the biasing means is a coil spring arranged to surround the outer cylinder member, one end of the coil spring is connected to the inner cylinder member, and the other end of the coil spring is connected to the The one connected to the outer cylinder member is preferable. According to such a configuration, when the coil spring is connected to both the outer cylinder member and the inner cylinder member in a compressed state, the coil spring restores to its original shape when the gap between the wall and the nut becomes large. As a result, the inner cylinder member automatically rotates and protrudes from the outer cylinder member.

The packing of the present invention preferably further includes a stopper for fixing the inner cylinder member to the outer cylinder member in a state in which the inner cylinder member is contracted with respect to the outer cylinder member. According to such a configuration, the packing in the expansion standby state can be easily installed by removing the stopper after the packing is installed between the wall and the nut with the inner cylinder member fixed to the outer cylinder member by the stopper. can do.

In the packing of the present invention, it is preferable that a flat portion for engaging a wrench is formed on at least one of the outer peripheral portion of the inner cylindrical member and the outer peripheral portion of the outer cylindrical member. According to such a configuration, the packing can be easily tightened.

In the packing of the present invention, it is preferable that the male threaded portion and the female threaded portion are reverse threads, and that the inner cylindrical member extends from the outer cylindrical member while rotating clockwise when viewed from above. According to such a configuration, the nut that is in contact with the upper portion rotates clockwise at the same time as the inner cylindrical member rotates, so the nut moves downward, and the packing expands and is pushed downward. In other words, it is possible to obtain an expansion effect of twice the thread pitch with respect to the rotation of the inner cylindrical member.

The packing of the present invention has high versatility and can be easily constructed.

It is a perspective view showing packing concerning an embodiment of the present invention. It is an exploded perspective view showing packing concerning an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the packing which concerns on embodiment of this invention, (a) is a top view, (b) is a side view. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the packing which concerns on embodiment of this invention, (a) is horizontal direction sectional drawing, (b) is vertical direction sectional drawing. FIG. 4 is a vertical cross-sectional view showing the stretched state of the packing according to the embodiment of the present invention; It is a figure which shows the state which installed the packing which concerns on embodiment of this invention, (a) is a longitudinal cross-sectional view which shows the original state of packing, (b) is a longitudinal cross-sectional view which shows the expansion|stretching state of packing.

A packing according to an embodiment of the present invention will be described in detail with reference to the drawings. In the description, the same elements are denoted by the same reference numerals, and overlapping descriptions are omitted.

In this embodiment, as shown in FIG. 6, the case where the packing 1 is installed at the upper end portion of the tie rod 3 passing through the load-bearing wall 2 in a wooden building will be described as an example. A lower end portion of the tie rod 3 protrudes downward from the lower end of the bearing wall 2 and is embedded in the foundation 4 . The upper end of the tie rod 3 protrudes upward from the upper end of the bearing wall 2 . A steel plate 5 serving as a washer is laid on the upper surface of the bearing wall 2 . A through hole is formed in the steel plate 5 , and the upper end of the tie rod 3 is inserted through the through hole of the steel plate 5 . The packing 1 is inserted through the upper end of the tie rod 3 that has passed through the steel plate 5 , and the tie rod 3 that further protrudes above the packing 1 is screwed with a nut 6 . If the wooden building has multiple stories, the tie rods 3 pass through the multiple stories.

The packing 1 is mounted between a steel plate 5 laid on a bearing wall (wall body) 2 through which a tie rod 3 is inserted and a nut 6 mounted on the tie rod 3 . As shown in FIGS. 1 and 2, the packing 1 includes an inner cylinder member 10, an outer cylinder member 30, and biasing means 50. As shown in FIGS.

As shown in FIGS. 3 and 4, the inner cylinder member 10 is a cylindrical member into which the tie rod 3 can be inserted in an unlocked state (unthreaded state). also has a large inner diameter. A male screw portion 11 is formed on the outer peripheral portion of the inner cylindrical member 10 . The male threaded portion 11 is formed at the lower portion of the inner tubular member 10 and in a portion to be inserted into the outer tubular member 30 . The external threaded portion 11 is not formed at the upper end portion of the outer periphery of the inner cylindrical member 10 , and a cylindrical circumferential portion 12 is formed. The upper end portion of the inner cylinder member 10 projects upward from the outer cylinder member 30 , and the upper end surface of the inner cylinder member 10 contacts the nut 6 .

A stopper locking hole 13 and a biasing means locking hole 14 are formed in the circumferential portion 12 . The stopper locking hole 13 is a hole into which one end of a later-described stopper 25 is inserted, and extends along the radial direction of the inner cylindrical member 10 . The biasing means locking hole 14 is a hole into which one end (upper end) of the coil spring 51 constituting the biasing means 50 is inserted, and extends along the tangential direction of the inner peripheral surface of the inner cylindrical member 10 . ing.

A flat portion 15 is formed on the upper edge of the circumferential portion 12 . A pair of plane portions 15 are formed so as to be parallel to each other, for locking a spanner.

The outer cylindrical member 30 has the inner cylindrical member 10 inserted therein, and has a female screw portion 31 formed on the inner peripheral portion thereof. The male threaded portion 11 of the inner cylinder member 10 is screwed into the female threaded portion 31 , and when the inner cylinder member 10 rotates relative to the outer cylinder member 30 , the inner cylinder member 10 rotates toward the outer cylinder member 30 . move axially with respect to The male threaded portion 11 and the female threaded portion 31 are reverse threads, and are raised relative to the outer tube member 30 when the inner tube member 10 rotates to the right as viewed from above.

A stopper locking hole 33 is formed in the upper end surface of the outer cylindrical member 30 . The stopper locking hole 33 is a hole into which the other end (lower end) of the stopper 25 is inserted, and extends downward from the upper end surface. The stopper locking holes 33 are provided at four locations, and are arranged at predetermined equal intervals on the upper end surface of the outer cylinder member 30 . The stopper 25 is a rod-shaped member for preventing rotation of the inner cylinder member 10 with respect to the outer cylinder member 30, and spans between the locking holes 13 and 33 for stoppers.

A locking hole 34 for biasing means is formed in the lower end portion of the outer peripheral surface of the outer cylindrical member 30 . The biasing means locking hole 34 is a hole into which the other end (lower end) of the coil spring 51 is inserted, and extends radially from the outer peripheral surface of the outer cylindrical member 30 .

A flat portion 35 is formed at the lower edge of the outer peripheral surface of the outer cylinder member 30 . A pair of plane portions 35 are formed so as to be parallel to each other, for locking a spanner.

The biasing means 50 biases one of the inner cylinder member 10 and the outer cylinder member 30 with a rotational force to relatively rotate the other. In this embodiment, the biasing means 50 rotates the inner cylinder member 10 relative to the outer cylinder member 30 . The biasing means 50 biases the rotational force in the direction in which the inner cylinder member 10 protrudes from the outer cylinder member 30 (the direction in which the inner cylinder member 10 rotates to the right when viewed from above). The biasing means 50 is composed of a coil spring 51 arranged so as to surround the outer cylindrical member 30 .

The coil spring 51 is mounted in a wound and compressed state, and the coil spring 51 expands while rotating, thereby biasing the inner cylindrical member 10 in a rightward rotation direction. One end (upper end) of the coil spring 51 is connected to the inner cylinder member 10 , and the other end (lower end) of the coil spring 51 is connected to the outer cylinder member 30 . Specifically, the coil spring 51 includes a coil body wound in a coil shape, a rising portion 52a rising upward from the coil body, a horizontal portion 52b bending from the tip of the rising portion 52 and extending horizontally, and a protruding portion 52c that protrudes radially inward at the lower end of the coil body. The horizontal portion 52b at the upper end of the coil spring 51 is inserted into the locking hole 14 for biasing means of the inner cylindrical member 10, and the tip thereof faces in the direction to rotate the inner cylindrical member 10 to the right. A protruding portion 52 c at the lower end of the coil spring 51 is inserted into the biasing means locking hole 34 of the outer cylindrical member 30 and faces toward the center of the outer cylindrical member 30 . In this manner, the coil spring 51 is engaged with the projecting portion 52c projecting in the radial direction of the outer cylindrical member 30, so that the coil spring 51 is not displaced in the radial direction. Further, since the horizontal portion 52b at the upper end of the coil spring 51 protrudes in the tangential direction of the inner cylinder member 10, the inner cylinder member 10 can be easily rotated.

As shown in FIG. 6(a), the packing 1 configured as described above is laid on a load-bearing wall (wall body) 2, a tie rod 3 is inserted therein, and a nut 6 is attached to the upper end of the tie rod 3. Installation is easy because it can be installed simply by tightening the . The packing 1 is clamped between the steel plate 5 and the nut 6 screwed onto the upper end of the tie rod 3 while the coil spring 51 is in a compressed state (in a crimped state). Before the packing 1 is installed, the inner cylindrical member 10 is fixed to the outer cylindrical member 30 by the stopper 25 so that the coil spring 51 is kept compressed. After the packing 1 is installed, the inner cylinder member 10 becomes rotatable with respect to the outer cylinder member 30 by removing the stopper 25 . At this time, by tightening the nut 6, the inner cylindrical member 10 cannot protrude upward, so the coil spring 51 of the packing 1 is maintained in a compressed state.

When the wood shrinks from this state due to drying or vertical load, the upper end of the load-bearing wall 2 and the steel plate 5 are lowered, and the gap with the nut 6 is increased as shown in FIG. 6(b). Then, the inner cylinder member 10 is allowed to move upward, and the inner cylinder member 10 is rotated clockwise by the urging means 50 and rises relative to the outer cylinder member 30 (see FIG. 5). The inner cylindrical member 10 rotates and rises to a position where it presses the nut 6 from below. In other words, although the gap between the nut 6 and the steel plate 5 on the bearing wall 2 side becomes large, the biasing means 50 rotates the inner cylinder member 10 to the right relative to the outer cylinder member 30 so that the inner cylinder member 10 is projected from the outer cylinder member 30, the packing 1 expands following the increase of the gap. As a result, the looseness of the nut 6 can be eliminated, and the load-bearing wall 2 is securely fixed.

If the tie rod has an outer diameter that is smaller than the inner diameter of the inner cylinder member 10, tie rods with a plurality of diameters can be used, and versatility is enhanced.

The biasing means 50 is a coil spring 51 which is stretched between the outer cylindrical member 30 and the inner cylindrical member 10 in a compressed state. When 51 restores its original shape, the inner cylinder member 10 automatically rotates and protrudes from the outer cylinder member 30, so that the increase in the gap can always be followed.

In the present embodiment, the stopper 25 is further provided for fixing the inner cylinder member 10 to the outer cylinder member 30 in a state in which the inner cylinder member 10 is retracted with respect to the outer cylinder member 30 so that the inner cylinder member 10 is fixed to the outer cylinder member 30 without rotation. By removing the stopper 25 after the packing 1 is installed with the tubular member 10 fixed to the outer tubular member 30, the packing 1 in the extended standby state can be easily installed.

Since flat portions 15 and 35 for engaging wrenches are formed on the inner cylindrical member 10 and the outer cylindrical member 30, the packing 1 can be easily tightened.

In this embodiment, as shown in FIG. 5, when the inner cylinder member 10 rotates to the right, the frictional force between the upper end surface of the inner cylinder member 10 and the lower end surface of the nut 6 causes the nut 6 that is in contact with the upper part. also rotates to the right. Here, since the male threaded portion 11 and the female threaded portion 31 are reverse-threaded, when both are rotated clockwise, the inner cylindrical member 10 rises relative to the outer cylindrical member 30, and the nut 6 moves toward the tie rod 3. and go down. That is, since the packing 1 is stretched and pushed downward by the nut 6, it is possible to obtain the effect of stretching twice the thread pitch (the effect of filling the gap) with respect to the rotation of the inner cylindrical member 10.

Although the embodiments for carrying out the present invention have been described above, the present invention is not limited to the above-described embodiments, and design changes can be made as appropriate without departing from the gist of the present invention. For example, in the above embodiment, the stopper 25 spans between the stopper locking holes 13 and 33, but is not limited to this. One of them may be engaged with the flat portion 15 of the inner tubular member 10 and the other may be engaged with the stopper engaging hole 33 of the outer tubular member 30 .
In addition, although the biasing means 50 is composed of the coil spring 51, it is not limited to this.

1 packing 2 bearing wall (wall body)
3 Tie Rod 6 Nut 10 Inner Cylinder Member 11 Male Thread Portion 15 Plane Portion 21 Coil Spring 25 Stopper 30 Outer Cylindrical Member 31 Female Thread Portion 35 Plane Portion 50 Biasing Means 51 Coil Spring

In order to solve the above-described problems, the present invention provides a packing that is mounted between a wall through which a tie rod is inserted and a nut that is mounted on the tie rod, the packing having the tie rod inserted inside and a male packing on the outer circumference. an inner cylindrical member having a threaded portion; an outer cylindrical member through which the inner cylindrical member is inserted and having a female threaded portion into which the male threaded portion is screwed on an inner peripheral portion thereof; an urging means for urging a rotational force to relatively rotate one of the outer cylinder members with respect to the other, wherein the inner cylinder member allows the tie rod to pass through in an unlocked state, and the urging means A coil spring is disposed so as to surround the outer cylinder member, and biases a rotational force in a direction in which the inner cylinder member protrudes from the outer cylinder member. and the other end of the coil spring is connected to the outer cylindrical member .

According to the packing of the present invention, the gap between the nut and the wall or the like (specifically, the steel plate on the wall side) increases when the wood of the wall or the like dries and shrinks. Since the cylindrical member is rotated relative to the outer cylindrical member to protrude the inner cylindrical member from the outer cylindrical member, the packing expands as the gap increases. As a result, the looseness of the nut can be eliminated, and the wall is securely fixed. In addition, since such a packing can be mounted on a wall body, the tie rod can be inserted through the inside in an unlocked state, and the nut 6 can be tightened, installation is easy. Furthermore, if the outer diameter of the tie rod is smaller than the inner diameter of the inner cylindrical member, tie rods with a plurality of diameters can be used, increasing versatility. Furthermore, if the coil spring is connected to both the outer cylinder member and the inner cylinder member in a compressed state, when the gap between the wall and the nut becomes large, the coil spring restores to its original shape, thereby enabling the inner cylinder member to rotates automatically and protrudes from the outer cylinder member.

Claims (5)

A packing attached between a wall through which a tie rod is inserted and a nut attached to the tie rod,
An inner cylindrical member, into which the tie rod is inserted and a male threaded portion is formed on the outer peripheral portion, and a female threaded portion, into which the inner cylindrical member is inserted and to which the male threaded portion is screwed, is formed on the inner peripheral portion. and an urging means for urging one of the inner cylinder member and the outer cylinder member to rotate the other relative to the other,
The inner cylindrical member allows the tie rod to pass through in an unlocked state,
A packing, wherein the biasing means biases a rotational force in a direction in which the inner cylinder member protrudes from the outer cylinder member. The biasing means is a coil spring arranged to surround the outer cylindrical member,
The packing according to claim 1, wherein one end of said coil spring is connected to said inner cylindrical member, and the other end of said coil spring is connected to said outer cylindrical member. 3. The packing according to claim 1, further comprising a stopper that fixes the inner cylinder member to the outer cylinder member in a state in which the inner cylinder member is contracted with respect to the outer cylinder member. 4. A planar portion for engaging a wrench is formed on at least one of the outer peripheral portion of the inner cylindrical member and the outer peripheral portion of the outer cylindrical member. Packing described in . The male threaded portion and the female threaded portion are reverse threads,
The packing according to any one of claims 1 to 4, wherein the inner cylindrical member extends from the outer cylindrical member while rotating clockwise when viewed from above.

Images