JP5235244B1 - Strap band device for connection - Google Patents

Abstract

[PROBLEMS] To provide a housing 4 having a strength capable of withstanding torsional force K even if a tightening torque greater than an allowable torque is applied to the screw rod 9 during rotation of the screw rod 9, and the durability of the housing 4 is improved. A strap band device for connection 1 is provided.
Since the housing 4 is provided as a bottomed frame body 4c formed by work hardening by drawing, the rigidity of the bottomed frame body 4c is increased, the housing 4 is solidified, and the screw rod 9 is rotated. Sometimes, even if a tightening torque higher than the allowable torque is applied to the screw rod 9, the housing 4 is strong enough to withstand the torsional force K, and is not inadvertently twisted and deformed. The good meshing state with 9a is maintained, and the strong tightening force of the strap band 3 against the connection hose 2 is maintained for a long time.
[Selection] Figure 1

Description

  The present invention relates to a connection strap band device in which a strap band is wound around a connection portion between a tubular member and a metal tube or the like, and is tightened with a constant tightening force, and particularly improved to a housing in which a screw rod is rotatably arranged. It is related with the strap band apparatus for connection which gave.

In recent years, the hose for connection, which is a fastened object around which the strap band is wound, is used for air conditioning of vehicles that pump liquid refrigerant, and especially for turbo piping exposed to high temperatures and pressures. Is required.
In order to increase the mechanical strength of the hose, measures such as increasing the rubber hardness of the hose, increasing the number of reinforcing threads embedded in the hose, and adopting an adhesive composite structure in which the strap band is integrated with the resin hose are taken. ing. Unlike a normal rubber hose, the hose with an adhesive composite structure requires a high tightening force on the hose, and a method for ensuring a stable tightening state is being sought.

  A general structure of this type of strap band is such that a tooth row portion made up of a large number of slit teeth is provided at the other end portion of the band and overlapped with one end portion having a housing so as to be slidable. At the time of attachment to the hose, the screw in the housing is engaged with the slit teeth of the tooth row portion, and the other end portion of the band slides on one end portion by rotating the hose.

As specific examples of the strap band device, Patent Literatures 1 to 5 disclose a screw band, a hose fastener, a hose clamp, a hose clip, and a connection clamp device, respectively.
In Patent Documents 1 to 5, the storage portion attached to the band is referred to as a polymer compound tightening portion, housing, housing portion, casing, and housing. All of them have a worm screw in the housing as the storage portion. The structure is configured to mesh with the row portion so as to be rotatable, and to fasten the object to be fastened by the tightening torque of the worm screw with respect to the tooth row portion.

Japanese Utility Model Publication No. 07-44962 Japanese Utility Model Publication No. 01-176293 JP 2003-28366 A Japanese National Patent Publication No. 06-507465 Japanese Patent No. 4738328

In the tooth row portion of the band, a bridge-like beam side portion existing between the two slit teeth is provided, and the helical tooth of the worm screw comes into pressure contact with the beam side portion as the worm screw rotates.
In patent documents 1-5, since a helical tooth receives reaction force from the beam side part of a dentition part in the process in which a worm screw slides a dentition part in connection with rotation operation of a worm screw, a housing has a band. A torsional force acting around the radial direction is generated on the outer surface of the.

  In particular, when a large tightening torque is applied to the worm screw, the worm screw slidably contacts the dentition portion in the process of reducing the diameter due to the tightening force, and the housing is twisted to a large extent, resulting in torsional deformation. There is a possibility that the meshing state of the part and the spiral teeth is deteriorated, the band tightening is loosened, and the band tightening force against the object to be fastened is impaired.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an allowable torque to the screw rod during the rotation operation of the screw rod because the bottomed frame body as a housing has undergone work hardening and has increased rigidity. It is an object of the present invention to provide a robust strap band device for connection that has a strength that allows a housing to withstand twisting force even when the above tightening torque is applied and that does not inadvertently twist and deform.

(About claim 1)
The strap band is formed in an end ring shape from one end side and the other end side bent so as to overlap the outer side of the one end side, and is configured to wind an object to be fastened. The housing is fixedly attached to one end of the strap band.
The screw rod is disposed in the housing so as to be rotatable and has a helical tooth formed with a predetermined pitch width. A large number of slits are provided on the other end side of the strap band, traverse the strap band in the width direction, and are arranged at equal intervals along the circumferential direction in a state inclined by a predetermined angle with respect to the circumferential direction. By engaging the helical teeth of the screw rods with these slits, a tooth row portion is formed by providing a bridge-shaped beam side portion in which the helical teeth mesh between adjacent slits.
As the screw rod rotates, the other end of the strap band slides relative to the one end side by sliding the spiral teeth against the beam side, and the strap band is reduced in the diameter reduction direction. Deform and tighten the object to be fastened. The housing has a shallow bottomed frame made up of a bottom and a rectangular frame integrally formed by drawing and hardening a single metal sheet having openings and small circular holes on the left and right. As shown in FIG.
After the drawing process, the left opening and the right opening constitute an elongated first insertion hole and second insertion hole through which one end of the strap band is inserted. The small circular hole constitutes an insertion hole, and a spindle hole is formed on one side of the bottomed frame body at the upper portion of the first insertion hole.
The screw rod is inserted into the support hole which is one end of the screw rod, and the other end is engaged with the upper edge of the opening of the insertion hole, so that the screw rod engages the tooth teeth with the helical teeth. In the bottomed frame, it is arranged so as to be rotatable.
The opening edge of the elongated opening formed on the one end side of the strap band is a pair of rectangular shapes provided with tips that are projected toward the bottom in a state of being separated from each other by a predetermined distance. The protrusion is integrally formed. At both edge portions along the circumferential direction of the bottom portion, recessed portions are provided in which a pair of projecting portions are engaged and mounted so as to sandwich the bottom portion in the circumferential direction.

  According to the first aspect of the present invention, in the process in which the screw rod slides on the dentition portion and the strap band undergoes the diameter reduction deformation in accordance with the rotation operation of the screw rod, the housing has a reaction force from the beam side portion of the dentition portion. To receive a torsional force acting radially on the outer surface of the strap band.

At this time, the bottomed frame body is subjected to work hardening by drawing, and its rigidity is increased and the housing is strengthened. Therefore, even if the housing receives a twisting force, the strength of the housing is sufficient to resist the twisting force. It becomes a big size.
For this reason, even if a tightening torque higher than the allowable torque is applied to the screw rod during the rotation operation of the screw rod, the housing has a strength that can withstand the twisting force and does not inadvertently twist and deform. As a result, a good meshing state between the beam side portion and the helical tooth is maintained, and the strong tightening force of the strap band with respect to the object to be fastened is maintained for a long period of time.
Also, when attaching the strap band to the housing, the pair of protrusions on one end side of the strap band are engaged with the recesses and attached, so that one end side can be fixed to the bottom in a non-moving state. Become.
In addition, since the protruding portion is integrally formed on one end portion side of the strap band, the one end portion side can be fixed to the bottom portion in a non-moving state without adding a new separate member, and the fixing structure is complicated. It is also advantageous in terms of cost.

(About claim 2)
The first insertion hole portion and the second insertion holes portion, thereby inserting the one end of the strap band so as to abut against the inner surface of the bottom.

  In claim 2, when the strap band is assembled to the housing, the strap band can be quickly and easily inserted into the housing by inserting one end of the strap band into the first insertion hole and the second insertion hole. Assembling is improved and assemblability is improved, which contributes to productivity.

In this case, since the one end portion side is in contact with the inner surface of the bottom portion, the contact area between the one end portion side and the bottom portion is increased, and the fixed state of the bottom portion with respect to the one end portion side is strengthened.

Here, as a normal mounting structure, the bottom part of the housing is divided into two parts, that is, a left side part and a right side part, and the left side part and the right side part are fixed to each other by bending and crimping to one end side. .
In this mounting structure, if a tightening torque greater than the allowable torque is applied to the screw rod during the rotation operation of the screw rod, the torsional force of the housing is transmitted to the bottom and a large torsional force acts on the bottom. There is a possibility that the abutting portion between the tip edge and the tip edge of the right side portion is twisted, the left side portion and the right side portion are distorted, and the fixed state of the bottom portion with respect to the one end side is deteriorated.

  On the other hand, in claim 2, the bottom portion that abuts on the one end side is an integrated body that has been hardened by work hardening, so that even if a large twisting force acts on the bottom portion, the bottom portion is the left side portion and the right side portion. Unlike the mounting structure having the abutting portion with the portion, the bottom portion is not twisted and deformed, and the fixed state of the bottom portion with respect to the one end portion side can be maintained well.

( Claim 3 )
The screw rod is a trapezoidal screw in which the thread of the helical tooth has a trapezoidal profile.
According to a third aspect of the present invention , the helical teeth of the screw bar mesh with the beam side portion of the dentition portion in the vicinity of the tooth root having a large tooth thickness and high strength.
That is, the helical tooth meshes with the beam side part in a large area, the meshing of the helical tooth with the beam side part is stabilized, and the meshing part of the helical tooth with respect to the beam side part increases, during the rotation operation of the screw rod, The sliding contact force of the spiral teeth with respect to the beam side portion is increased, and the tensile force with respect to the other end portion side of the strap band can be strengthened with the rotation operation of the screw rod.

(About claim 4 )
The metal sheet is a stainless steel metal, and the bottomed frame as a housing has a thickness set within a dimensional range of 1.0 mm to 2.0 mm.
According to the fourth aspect of the present invention , the bottomed frame as the housing is work-hardened by drawing the metal sheet, so that the thickness is small and lightweight while maintaining the necessary strength, and the management is easy and easy to handle. .

(Example 1) which is a perspective view which shows the strap band apparatus for a connection. (A)-(d) is the schematic which shows the process in which a metal sheet is formed in the bottomed frame of a housing by drawing (Example 1). (A) is a perspective view showing a state in which the other end side is overlapped on one end side of the strap band, (b) is a longitudinal section showing a state in which the screw rod in the housing is engaged with the beam side part of the tooth row part. (Example 1) which is a figure. (A) is a perspective view (Example 2) which shows the bottomed frame as a housing, (b)-(d) is a perspective view which shows the bottomed frame as a housing (modification). (A) is a perspective view of a housing, (b) is a perspective view of one end side of a strap band, and (c) is a longitudinal sectional view taken along line NN in (b) (Example 3). (A) is a perspective view which shows the state which attached the strap band to the housing, (b) is a perspective view which shows the state which gave the surface pressing process to the bottom part of the housing (Example 3).

  In the connecting strap band device of the present invention, the housing is provided as a bottomed frame body formed by work hardening by drawing, the rigidity of the bottomed frame body is increased, the housing is solidified, and the durability against torsional deformation is increased. An improved configuration is a technical feature.

[Configuration of Example 1]
A connecting strap band device 1 according to a first embodiment of the present invention will be described with reference to FIGS.
The connection strap band device 1 in FIG. 1 takes into account the recent circumstances in which high durability is required for the connection hose 2 as a fastening object, for example, increases the rubber hardness of the connection hose 2 and increases the mechanical strength. Therefore, the reinforcement thread is increased. For this reason, it is suitable for the case where a tightening force of a large surface pressure is required for the connection hose 2 as a tightening force, for example, an engine with a supercharger (not shown) for increasing the air filling rate. This is applied when an intercooler that cools compressed air and an intake pipe (both not shown) are connected.

  The connecting clamp device 1 includes a strap band 3 which is bent so as to form an end-like ring as a whole, and is wound around the connecting hose 2 as described later. The strap band 3 is formed in a band shape having a desired width and length by an elastic material such as a SUS304 stainless steel plate.

The one end 3A of the straps band 3, housings 4 is mounted along the tangential direction of the one end side 3A. As shown in FIGS. 2A to 2D, the housing 4 includes a rectangular bottom portion 4a and a rectangular frame portion 4b, which are integrally formed by processing and hardening a single metal sheet 4A (SUS304) by drawing. It is comprised as the shallow bottomed frame 4c which consists of. In other words, the bottomed frame 4c has a shallow box shape with an open top, and its thickness (t) is set within a dimensional range of 1.0 mm to 2.0 mm. t) is adopted.

  In manufacturing the bottomed frame 4c, as shown in FIG. 2A, a metal sheet 4A having a rectangular opening 6a and an opening 6b with a small circular hole 6e on the left and right is prepared, and a cavity 4B is provided. Installed in a rectangular mold 5. In this state, the metal slider 7 is lowered to draw the metal sheet 4A, and as shown in FIG. 2 (b), the formed metal sheet 4A is taken out from the cavity 4B, and as shown in FIG. 2 (c). In addition, the bottomed frame 4c is formed by grinding and removing the ear fringe portion 6c in the upper peripheral portion.

  In this drawing process, the openings 6a and 6b of the frame 4b are formed in the lower part of the frame 4b due to plastic deformation that expands the cut region, and are inserted into the strap band 3 at one end 3A. The first insertion hole 6A and the second insertion hole 6B are configured. Accordingly, the small circular hole 6e constitutes an insertion hole 6C that abuts a shaft portion 9e of a screw rod 9 described later.

That is, as shown in FIG. 2 (d), a shaft hole 4d positioned above the first insertion hole 6A is provided on one side of the bottomed frame 4c. The side portion is provided with an insertion hole 6C located above the second insertion hole portion 6B.
Although the metal sheet 4A having the opening 6a and the opening 6b with the small circular hole 6e on the left and right is used, the metal sheet 4A is made non-porous, and after drawing, the first difference is obtained by machining means such as cutting. The insertion hole 6A, the second insertion hole 6B, and the insertion hole 6C may be formed.

  As shown in FIG. 3B, the one end side 3A of the strap band 3 is inserted through the first insertion hole portion 6A and the second insertion hole portion 6B of the frame portion 4b, and in this state, the bottom portion 4a is It is firmly fixed by caulking to the one end portion side 3A (see symbol G in FIGS. 1 and 2D). On the outer side of the one end side 3A of the strap band 3, the other end side 3B bent in an arc shape so as to overlap therewith is located.

  As shown in FIG. 3A, the other end side 3B of the strap band 3 crosses the strap band 3 in the width direction W and is inclined in the circumferential direction R by a predetermined angle θ with respect to the circumferential direction R. A large number of slits 8a are arranged in parallel at equal intervals.

  The screw rod 9 is a kind of worm gear having spiral teeth 9a formed with a predetermined pitch width, and the spiral teeth 9a constitute a trapezoidal screw whose thread has a trapezoidal profile. One end of the screw rod 9 has a support shaft 9b, and the other end has a large flange 9c and a square head 9d adjacent to the flange 9c.

The screw rod 9 is rotatably arranged inside the housing 4 through the insertion hole 6C, and the support shaft 9b is inserted into the support shaft hole 4d of the frame portion 4b, and the other end is opened to the insertion hole 6C. The upper edge portion 6d is locked, and the flange portion 9c is brought into contact with the outside of the frame portion 4b in a retaining state (see FIG. 3B).
The screw rod 9 is disposed in the bottomed frame 4c of the housing 4 and the bottom portion 4a is crimped to the one end portion side 3A, whereby the spiral teeth 9a of the screw rod 9 are engaged with the slits 8a. In this state, the dentition portion 8 is formed by providing the bridge-shaped beam side portion 10 in which the spiral teeth 9a mesh between the adjacent slits 8a.

  A portion of the strap band 3 that overlaps the inside of the bottom portion 4a on the one end portion side 3A bulges outward along the radial direction S to form a protruding portion 3m that accommodates the bottom portion 4a. The bulging amount E of the overhanging portion 3m is set equal to the thickness T of the bottom portion 4a so that the outer side surface 4w of the bottom portion 4a is flush with the inner side surface 3u of the strap band 3.

  In the above configuration, when the screw rod 9 is rotated through the rectangular head portion 9d, the screw rod 9 causes the spiral teeth 9a to slidably contact the beam side portion 10 as a result of this operation. The side 3B slides relative to the one end portion side 3A along the tightening direction, and the strap band 3 is deformed in the reduced diameter direction to tighten the connection hose 2 as the object to be fastened.

[Effect of Example 1]
In the first embodiment, in the process in which the screw rod 9 slides on the tooth row portion 8 and the strap band 3 undergoes a diameter-reducing deformation in accordance with the rotation operation of the screw rod 9, the housing 4 has the helical tooth 9a having the tooth row portion 8 in the process. Therefore, a torsional force K acting around the radial direction S on the outer surface of the strap band 3 is received as shown in FIG.

At this time, the bottomed frame 4c is work-hardened by drawing, and the rigidity of the bottomed frame 4c is increased so that the housing 4 is hardened. Therefore, even if the housing 4 receives the torsional force K, the strength of the housing 4 becomes the torsional force. It is big enough to withstand.
For this reason, even when a tightening torque higher than the allowable torque is applied to the screw rod 9 during the rotation operation of the screw rod 9, the housing 4 has a strength that can withstand the twisting force K, and may be twisted and deformed carelessly. Absent. Thereby, the good meshing state of the beam side part 10 and the helical tooth 9a is maintained, and the strong fastening force of the strap band 3 with respect to the article to be fastened is maintained for a long period of time.

  Formed along the width direction W of the strap band 4 on the left and right sides of the frame portion 4b of the bottomed frame 4c as the housing 4, and is in contact with the inner surface of the bottom portion 4a through the one end side 3A of the strap band 3. A first insertion hole portion 6A and a second insertion hole portion 6B are provided, and are fixed by caulking the bottom portion 4a to the one end portion side 3A.

  As a result, when the strap band 3 is assembled to the housing 4, the strap band 3 can be quickly strapped by a simple operation of inserting one end side 3A of the strap band 3 into the first insertion hole 6A and the second insertion hole 6B. The band 3 can be assembled to the housing 4 and the assemblability is improved, thereby contributing to the improvement of productivity.

Since the bottom portion 4a of the bottomed frame 4c is fixed to the one end portion 3A of the strap band 3 by caulking, it is advantageous in terms of cost and is fixed using welding, a fastening bolt (not shown), or the like. Unlike the case, it contributes to quick assembly of the housing 4.
In this case, since the one end portion side 3A is in contact with the inner surface of the bottom portion 4a, the contact area between the one end portion side 3A and the bottom portion 4a is increased, and the bottom portion 4a is firmly fixed to the one end portion side 3A.

Here, as a normal mounting structure, the bottom part of the housing is divided into two parts, a left side part and a right side part, and the left side part and the right side part are fixed to one end side by bending and crimping to 3A. Mention.
In this mounting structure, when a tightening torque greater than the allowable torque is applied to the screw rod 9 during the rotation operation of the screw rod 9, the torsional force K of the housing is transmitted to the bottom, and a large torsional force K acts on the bottom. The butted portion between the leading edge of the left side portion and the leading edge of the right side portion is twisted and the left side portion and the right side portion are distorted, and the fixed state of the bottom portion with respect to the one end side 3A may be deteriorated.

  On the other hand, in the first embodiment, the bottom 4a that is in contact with the one end side 3A is an integrated body that has been hardened by work hardening, so that even if a large twisting force K acts on the bottom 4a, the bottom 4a. Unlike the mounting structure having the butted portion of the left side portion and the right side portion, the bottom portion 4a is not twisted and deformed, and the fixed state of the bottom portion 4a with respect to the one end portion side 3A can be kept good.

The portion of the strap band 3 that overlaps the inside of the bottom portion 4a on the one end side 3A forms an overhang portion 3m that bulges outward along the radial direction S and accommodates the bottom portion 4a, and the outer surface 4w of the bottom portion 4a is the strap. The inner surface 3u of the band 3 is flush with the inner surface 3u.
For this reason, while forming the overhang | projection part 3m in the part corresponding to the bottom part 4a in the one end part side 3A, since the outer side surface 4w of the bottom part 4a is flush with the inner side surface 3u of the strap band 3, it is a strap for the connection hose 2. There is an advantage that the tightening force of the band 3 does not decrease at the overhang portion 3m and acts evenly on the entire surface of the connection hose 2 without being biased to one side.

Since the screw rod 9 is a trapezoidal screw having a trapezoidal profile in the thread of the helical tooth 9a, the helical tooth 9a of the screw rod 9 has a large tooth thickness and has a high strength near the tooth bottom. It meshes with the beam side 10.
That is, the helical tooth 9a meshes with the beam side part 10 in a large area, the meshing of the helical tooth 9a with the beam side part 10 becomes stable, and the meshing points of the helical tooth 9a with the beam side part 10 increase, and the screw When the rod 9 is rotated, the sliding contact force of the spiral teeth 9a with respect to the beam side portion 10 is increased, and the tensile force on the other end portion side 3B of the strap band 3 can be strengthened as the screw rod 9 is rotated.

  The metal sheet 4A is a stainless steel metal, and the bottomed frame 4c as the housing 4 has a thickness (t) set within a dimensional range of 1.0 mm to 2.0 mm. The bottom frame 4c is work-hardened by drawing the metal sheet 4A and maintains the required strength, but the thickness (t) is small and light, and is easy to manage and easy to handle.

[Configuration of Example 2]
FIG. 4A shows Example 2 of the present invention. Example 2 differs from Example 1 in that a bottomed frame 4c as a housing 4 is configured by a bottomed frame 4h composed of an elliptical annular frame 4f and an oblong bottom 4g.
Even if the bottomed frame 4h is configured as in the second embodiment, the same effect as in the first embodiment can be obtained.

  As a modification of the second embodiment, as shown in FIG. 4 (b), a bottomed frame 4 i as a housing 4 is made to have an octagonal frame portion 4 j that is flat in the circumferential direction of the strap band 3 and a flat octagonal bottom portion 4 k. As shown in FIG. 4 (c), a bottomed frame 4m as a housing 4 includes a rhombus frame portion 4n that is flat in the circumferential direction of the strap band 3, and a flat rhombus bottom portion 4p. As shown in FIG. 4 (d), the bottomed frame 4s as the housing 4 is composed of a hexagonal frame 4u flat in the circumferential direction of the strap band 3 and a flat hexagonal bottom 4v. You may comprise by.

[Configuration of Example 3]
5 and 6 show a third embodiment of the present invention. The third embodiment differs from the first embodiment in that a fixing mechanism 20 for attaching the bottom portion 4a is newly provided in place of the caulking to the bottom portion 4a of the housing 4. Since the fixing mechanism 20 is newly provided, the bulging portion 3m provided on the one end side 3A of the strap band 3 in Example 1 is omitted.
As shown in FIGS. 5A and 5B, the fixing mechanism 20 includes concave portions 20 a and 20 b formed on the bottom portion 4 a of the housing 4 and a pair of projecting portions 21 formed on one end side 3 </ b> A of the strap band 3, 22 is provided. The recessed portions 20a and 20b are provided so as to be U-shaped notches at both end edges in the circumferential direction R of the bottom portion 4a.

As shown in FIG. 5B, an elongated opening 23 is formed on one end side 3 </ b> A of the strap band 3.
As shown in FIG. 5C, the opening end edges 23a and 23b corresponding to the recessed portions 20a and 20b of the opening 23 are ejected by, for example, a press device (not shown) so as to protrude toward the bottom 4a. A pair of protrusions 21 and 22 having the tips 21a and 22a are formed in a rectangular shape.
The tips 21a, 22a of the protrusions 21, 22 are arranged along the circumferential direction R by a predetermined distance Q1. This interval Q1 is set equal to the separation dimension Q2 between the recesses 20a and 20b, and the band dimension Q3 along the width direction W of the tips 21a and 22a is set equal to the narrowing dimension Q4 of the recesses 20a and 20b. (See FIG. 5A).

6A, when the one end side 3A of the strap band 3 is inserted into the housing 4, the tips 21a and 22a of the protrusions 21 and 22 sandwich the bottom 4a along the circumferential direction R. It engages with the recesses 20a and 20b.
As a result, the one end side 3A of the strap band 3 is prevented from moving in the circumferential direction R and the width direction W, and is fixed in a non-moving state. At this time, a fine step Sp is generated between the tips 21a and 22a of the protruding portions 21 and 22 and the outer surface of the bottom 4a in the recessed portions 20a and 20b. However, the step Sp may be eliminated to be flush with each other.
Thereafter, the edge ridges generated at both edge portions of the bottom portion 4a are plastically deformed into a chamfered shape by surface pressing as shown by hatching Tm in FIG.

Thus, in Example 4, when attaching the strap band 3 to the housing 4, since the protrusion parts 21 and 22 of the one end part side 3A of the strap band 3 engage with the recessed parts 20a and 20b, the one end part side 3A Can be fixed to the bottom portion 4a in a stationary state.
Moreover, since the protruding portions 21 and 22 are integrally formed on the one end side 3A of the strap band 3, the one end side 3A can be fixed to the bottom portion 4a in a non-moving state without adding another new member. The fixing structure 20 is not complicated and is advantageous in terms of cost.

[Modification]
(A) In the first and second embodiments, the strap band 3 may be formed of a reinforced synthetic resin, a copper plate, or various metal alloys in place of the SUS304 stainless steel plate.
(B) The thickness (t) of the bottomed frame 4c in the housing 4 is set to 1.5 mm. However, the thickness (t) is not limited to the dimensional range of 1.0 mm to 2.0 mm. You may change variously according to an attachment condition.

(C) Although the housing 4 is mounted along the tangential direction of the one end side 3A of the strap band 3, geometric accuracy is not necessary, and a slight deviation from the tangential direction is within an allowable range. From the point of view, it may be a tangential direction.
(D) Instead of caulking to the bottom 4a of the housing 4, the strap 4 is attached to the bottom 4a of the housing 4 using attachment means such as various types of welding (resistance welding, projection welding, arc welding, TIG welding, plasma welding). 3 may be fixed to one end portion side 3A.

(E) Although the screw rod 9 is a trapezoidal screw having a trapezoidal cross section, the screw rod is not limited to a trapezoidal screw and may be a normal screw having a triangular thread.
(F) For the threaded rod 9, the spiral shaft length is formed in a drum shape, and this shaft length is made easy to follow along the circumferential direction of the strap band 3, so that the spiral teeth 9 a are formed on the beam side portion 10. The number of teeth engaged may be increased.

  In the strap band device for connection according to the present invention, since the housing is provided as a bottomed frame body formed by work hardening by drawing, the rigidity of the bottomed frame body is increased and the housing is solidified. Even if a tightening torque higher than the allowable torque is applied to the screw rod during the rotation of the screw rod, the housing has a strength that can withstand the twisting force and does not inadvertently twist and deform. The demand of related companies is stimulated to improve the durability of the housing, and it can be applied to the machine industry through the distribution of related parts.

1 Connection strap band device 2 Connection hose (fastened object)
3 Strap band 3A One end side of strap band 3B Other end side of strap band 4 Housing 4A Metal sheet 4a, 4g, 4k, 4p, 4v Bottom portion 4b, 4f, 4j, 4n, 4u Frame portion 4c, 4h, 4i, 4m, 4t bottomed frame
4d frame support shaft hole 6A first insertion hole 6B second insertion hole 6C insertion hole
6a, 6b metal sheet opening
Opening edge of 6d insertion hole
6e small circular hole 8 tooth row part 8a slit 9 screw rod 9a spiral tooth
9b spindle
9c buttock
9d square head 10 beam side 20 fixing mechanism 20a, 20b bottom recess 21, 22 projection 21a, 22a projection tip 23 opening P longitudinal direction of beam side Q1 spacing between projections K strap band Torsional force acting around the radial direction of the strap R The circumferential direction of the strap band W The width direction of the strap band S The radial direction of the strap band

Claims (4)

A strap band that is formed in a ring shape from one end side and the other end side that is bent so as to overlap the outer side of the one end side and winds an object to be fastened,
A housing fixedly attached to the one end side of the strap band;
A screw rod which is disposed in the housing so as to be rotatable and has spiral teeth formed with a predetermined pitch width;
A plurality of slits that are provided on the other end side of the strap band, traverse the strap band in the width direction, and are arranged at equal intervals along the circumferential direction in a state inclined by a predetermined angle with respect to the circumferential direction;
A tooth-line portion formed by providing a bridge-shaped beam side portion that meshes with the spiral teeth between the adjacent slits by engaging the spiral teeth of the screw rod with the slit;
As the screw rod rotates, the screw rod causes the spiral teeth to slide in contact with the beam side portion, so that the other end side of the strap band slides relative to the one end side. In the strap band device for connection, the strap band is deformed in the diameter reducing direction and tightens the object to be fastened.
The housing has a shallow bottomed frame composed of a bottom and a rectangular frame integrally formed by drawing and hardening a single metal sheet having openings and small circular holes on the left and right. As a body, it is configured in a shallow box shape with an upper surface opening, and the left opening and the right opening after drawing are elongated first insertion holes for inserting the one end side of the strap band and Each of the second insertion holes constitutes a small hole, and the small circular hole constitutes an insertion hole, and includes a support hole formed on one side of the bottomed frame body at the top of the first insertion hole. ,
The screw rod inserts a support shaft, which is one end thereof, into the support shaft hole, and engages the other end with an upper edge of the opening of the insertion hole, whereby the screw rod inserts the helical teeth into the dentition. It is arranged so that it can be rotated in the bottomed frame body in a state of meshing with the part,
The opening edge portion of the elongated opening formed on the one end side of the strap band is formed in a rectangular shape with tips that are projected toward the bottom portion while being separated from each other by a predetermined distance. A pair of protrusions are integrally formed, and at both end edges along the circumferential direction of the bottom portion, there are provided recessed portions to which the pair of protrusions are engaged and mounted so as to sandwich the bottom portion in the circumferential direction. A characteristic strap band device for connection. Claim wherein the first insert groove portion and the second insertion holes unit, characterized in that the pre-SL by inserting the one end of the strap band and is adapted to abut against the inner surface of the bottom The strap band device for connection according to 1. 2. The connecting strap band device according to claim 1 , wherein the screw rod is a trapezoidal screw in which a screw thread of the helical tooth has a trapezoidal cross-sectional profile . 2. The connection according to claim 1, wherein the metal sheet is a stainless steel metal, and the bottomed frame as the housing has a thickness set in a range of 1.0 mm to 2.0 mm . Strap band device.

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