JP3327837B2 - Automatic screw tightening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic screw tightening device for automatically tightening bolts and nuts mounted on a mounting member.

[0002]

2. Description of the Related Art Bolts and nuts have been widely used for fixing various construction-related articles and railroad sleepers to rails. For example, as shown in FIG. 14, the railroad pillow and the rail are pressed by pressing a holding spring 103 having a plate-shaped portion 102 passed from above the pillow 100 to the rail 101 by tightening a bolt n to the pillow 100. 100 and rail 1
01 is fixed. However, if the rail 101 is repeatedly vibrated, the rail 101 may be naturally loosened even if the biasing force of the pressing spring 103 is applied.

[0003] On the other hand, in a wooden building, for example, columns and beams are joined and fixed using building blade bolts.
No matter how perfect the nut is tightened or if the nut has a detent function, as the wood dries during construction and the columns and beams shrink, the nut Therefore, a gap is formed between the column and the beam, and the nut does not press the column, so that the nut does not function at all.
Then, the present inventor, as a solution to this problem,
Invented an automatic bolting device for building plate bolts. As shown in FIG. 15, this is a cylindrical rotor a, a cylindrical casing b which receives the rotor a so as to be rotatable and slidable up and down in the axial direction, and A spiral spring c wound around the outer periphery and applying a rotational force to the rotor a; and a nut n screwed to the blade bolt is received on the inner peripheral side of the rotor a. And a projection a2 projecting outward in the radial direction on the outer periphery on the upper end side of the rotor a, and a driving and fixing means b1 such as a needle on the lower end side of the casing b. A recess b2 is provided on the inner circumference on the upper end side of the casing b so as to receive the projection a2 in a non-rotatable manner. Then, in a state where the nut n is engaged with the engaging portion a1 of the rotor a, the casing b is fixed to a pillar or a beam as a mounting member to which the nut n is mounted by driving and fixing means b1. Slides toward the upper end side of the casing b, and the protrusion a
Numeral 2 comes out from the concave portion b2, applies a rotational force to the nut n engaged with the rotor a urged by the mainspring c, and keeps the nut n constantly urged. By keeping the nut n in the biased state in this way,
When the wood dries and the gap between the nut n and the pillar is widened, the nut n is automatically rotated by the force of the mainspring c,
The tightened state between the nut n and the column h1 can be maintained. However, in this case, the casing b can be fixed by being driven into the wood by the driving and fixing means b1 such as a needle provided at the tip end side of the casing b, but the metal on the rail 101 of the railway as shown in FIG. When the holding spring 103 made of metal is pressed with the bolt n, the metal holding spring 103 is arranged around the bolt n, so that the casing b is fixed by the driving and fixing means b1 such as a needle. Cannot be fixed by driving. Therefore, there is a problem that it is difficult to apply the bolts and nuts and the like mounted on the mounting member 103 made of metal or the like in the building blade bolt automatic tightening device as shown in FIG.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above circumstances, and automatically tightens bolts and the like mounted on a mounting member made of metal or the like which is difficult to drive with nails or the like. A first object is to provide an automatic screw tightening device capable of preventing loosening.

A second object of the present invention is to provide an automatic screw tightening device which can easily and quickly mount a nail or the like to a mounting member made of metal or the like which is difficult to drive.

The present invention is an automatic screw fastening device for a rail fixing bolt which can be easily attached to a rail fixing bolt to which a rail of a rail is fixed, and which can automatically tighten the rail fixing bolt to prevent loosening. Is the third purpose.

[0007]

The present invention SUMMARY OF] by providing a device threaded automatic tightening having the following features, the Division
To resolve the problem. The first invention of the present application is the main body 1, 100.
And mounting members 2 and 200. Main body 1, 100
Includes urging members 5 and 110 for urging the bolts and nuts n in the tightening direction. One end of the biasing member 5,110, by being engaged nonrotatably with bolts and nuts n, bolts and nuts n is applied a clamping force by the urging force of the urging member 5,110. Mounting members 2, 20
0 is a mounting member 103 on which bolts and nuts n are mounted;
9, mounting member mounting portions 22, 2 which are non-rotatably mounted
2, 220, 220, and the mounting member 2, 200
Is locked to the other end of the urging members 5 and 110 of the main bodies 1 and 100 so that the other ends of the urging members 5 and 110 of the main bodies 1 and 100 are attached via the mounting members 2 and 200. And is fixed to the mounting members 103 and 9. At least one of the main body 1, 100 and the mounting members 2, 200 includes a casing 3, 240a, 240a, and the urging members 5, 11 are provided in the casing 3, 240a, 240a.
0 is arranged, and the other end sides of the urging members 5, 110 are locked to the casings 3, 240a, 240a. The casing 3, 240a, 240a
200 makes it impossible to rotate. Further, the mounting member 2, 200
Are at least two attachment member pieces 2a, 2b, 200
a, 200b. Each of these mounting member pieces 2a, 2b, 200a, 200b
a, 21c, 210a, 210c, and the connecting members 21a, 21c, 210a, 210c connect the mounting member pieces 2a, 2b, 200a, 200b to each other, thereby being fixed to the mounting members 103, 9. Things.

The second invention of the present application is directed to the first invention of the present application. Each of the mounting member pieces 2a, 2b, 200a, 200b is fitted with each of opposing ends formed on the mounting members 103, 9. And fitting means 22a, 220a, 220, and 220, respectively, which are connected to each other.
21c, 210a and 210c. Then, as the connecting means 21a, 21c, 210a, 210c fit the respective ends of the mounting members 103, 9 into the fitting portions 22, 22, 220, 220, the mounting member pieces 2a, 2b,
200a and 200b are connected to each other and the mounting member 1
03 and 9 are attached non-rotatably.

The third invention of the present application is the first or second invention of the present application.
The mounting member 2, 220 according to the present invention comprises a main body receiving portion 26, 260 capable of receiving the main body portion 1, 100. Then, as the main body receiving portions 26 and 260 receive the main body portions 1 and 100, the other end sides of the urging members 5 and 110 are attached to the mounting members 2 and 220, respectively.
10 so that one end side can engage with a bolt or a nut n.
It was done .

[0010] A fourth aspect of the present invention includes a main body 1 and a mounting member 2. The main body 1 includes a casing 3, a rotor 4 movably disposed in the casing 3 in an axially up-down direction, and rotatably arranged, and a biasing member 5. One end of the urging member 5 is connected to the casing 3, and the other end of the urging member 5 is connected to the rotor 4, so that the rotor 4 is moved inside the casing 3 by the urging force of the urging member 5. The rotation force is applied. The rotor 4 is provided with the engaging portion 41 on the lower end side, so that the rotor 4 can non-rotatably engage with the bolt or the nut n . The casing 3 and the rotor 4 are provided with locking means 33 and 42 that can be engaged and disengaged from each other, so that the rotor 4 is maintained in the casing 3 in a biased state where a rotational force is applied. At the same time, as the rotor 4 is moved upward with respect to the casing 3, the engagement between the casing 3 and the rotor 4 is released, and the rotor 4 is engaged by the urging force of the urging member 5. Bolts engaged with 41
The nut n can be tightened. The mounting member 2 includes at least two opposing mounting member pieces 2a and 2b.
Each of these mounting member pieces 2a, 2b has a fitting portion 2 for fitting each of the opposite ends of the mounting members 103, 9 to the lower end side.
2 and 22 are provided on the upper end side with main body mounting portions 23 and 23, respectively. Furthermore, these attachment member pieces 2a, 2b are provided with connecting means 21a, 21c to be connected to each other. The connection means 21a and 21c are connected to each other by attaching the ends of the mounting members 103 and 9 to the fitting portions 22 and 22, respectively.
23 is a main body receiving portion 26 that can receive the main body 1 in a non-rotatable manner.
Is formed. The main body 1 is inserted into the main body receiving portion 26.
Is received, the rotor 4 moves upward with respect to the casing 3, and the engagement between the casing 3 and the rotor 4 is released.

[0011] In the first invention of the present application configured as described above ,
In this case, it is sufficient to attach the mounting member mounting portions 22, 22 of the mounting member 2 to the mounting members 103, 9. For example, the mounting member mounting portions 22, 22 may be attached to the opposite ends of the mounting members 103, 9, respectively. If the fitting member 10 is made of metal or concrete, it is difficult to drive a nail into the fitting member.
It can be attached to 3 and 9.

In the second aspect of the present invention , the mounting member 10 is inserted into each of the fitting portions 22, 22 of the mounting member pieces 2a, 2b.
It suffices that the opposing ends of the members 3 and 9 are fitted into each other, so that the mounting member pieces 2a and 2b can be connected to each other and non-rotatably mounted on the mounting members 103 and 9. Therefore, work such as screw tightening is not required at all, and the work of attaching to the mounting members 103 and 9 can be facilitated.

In the third invention of the present application, the mounting member 2,
At 220, a main body receiving portion 2 capable of receiving the main body portions 1 and 100 is provided.
6 and 260, and as the main body receiving portions 26 and 260 receive the main body portion 1 and 100, the urging members 5 and 11 are provided.
0 is attached to the attachment members 2 and 220, and one end of the urging members 5 and 110 is attached to a bolt or nut.
To n to provide a tightening force. By doing so, the mounting members 2 and 220 are attached to the mounting member 10.
Attached to 3,9, it is sufficient to receive the body portion 1100 to the main receiving unit 26,260, can the bolts and nuts n the energized by the urging force of the urging member 5, bolt or Na
In this state, a tightening force can be applied to the cut n , and the work can be facilitated.

In the fourth invention of the present application, the main body receiving portion 2
As the main body 1 is received by the rotor 6, the rotor 4 can be moved upward with respect to the casing 3 to release the engagement between the casing 3 and the rotor 4. In this way, after the mounting member pieces 2a and 2b are mounted on the mounting members 103 and 9 and the main body 1 is received in the main body receiving portion 26, the bolts and nuts engaged with the engaging portion 41 of the rotor 4 are formed. n can be biased by the biasing force of the biasing member 5, and the operation can be facilitated.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of the automatic screw tightening device according to the first embodiment of the present invention.

The automatic screw tightening device according to the first embodiment includes a main body 1 and a mounting member 2. The main body 1 is shown in FIG.
(A) As shown in (B), a cylindrical casing 3, a rotor 4 rotatably arranged in the casing 3, and a biasing member 5
And a lid 6.

The rotor 4, FIG. 3 (A) (B) ( C) as shown in a tubular shape, the lower end side of the cylinder wall, a bolt and Na
It has an engaging portion 41 that can engage the unit in a non-rotatable manner. The engaging portion 41 is formed so as to correspond to hexagonal bolts and nuts.
Although a square hole shape is sufficient, in this embodiment, a large number of corner portions are formed to facilitate engagement with hexagonal bolts and nuts.

An outer periphery of the upper end of the rotor 4 is provided with a locking portion 42 for preventing rotation which is formed in a substantially regular hexagonal shape. or,
A winding portion 44 for winding a mainspring 5 as a biasing member 5 described later is provided on the outer peripheral surface near the upper end of the rotor 4. Further, a rotor side locking groove 45 for locking the inner peripheral end of the mainspring spring 5 is formed in the winding portion 44 by being cut out from the upper end of the rotor so as to penetrate into the cylinder. Have been.

As shown in FIGS. 4 (A) and 4 (B), the casing 3 is formed of a cylindrical body capable of receiving the rotor 4 rotatably and slidably in the axial direction. The upper end of the casing 3 has an upper projecting portion 31 projecting radially inward. In addition, a locking member 33 for preventing rotation formed in a regular 24-sided shape is provided on the inner periphery of the upper protrusion 31.
The locking portion 42 for preventing rotation of the rotor 4 is received and can be locked non-rotatably. Also, this casing 3
The upper end is provided with a screw portion 34 for screwing the lid. A casing-side locking groove 35 for locking the outer peripheral end of the spring 1 is formed in the peripheral surface of the casing 3 so as to be cut from the lower end. A plurality of teeth 36 are provided over the entire lower surface of the casing 3.

In the present embodiment, the biasing member 5 is formed of a spiral spring 5 having a winding elasticity by spirally winding a steel plate. As shown in FIGS. 2 (A) and 2 (B), The inner and outer ends are bent into a U-shape,
The inner peripheral end 51 of the mainspring 5 is passed through the rotor-side locking groove 45 of the rotor 4 and hooked, and the outer peripheral end 52 is passed through the casing-side locking groove 45 of the casing 4 and hooked. 4 and the casing 3.

As shown in FIG. 5, the lid 6 is provided with a main body screwing portion 61 on the inner periphery at the lower end, and is screwed to the lid screwing portion 34 of the casing 3 so that the upper portion of the casing 3 It is attached to close the inner peripheral side of the casing 3 from above. In addition, a flange 62 is provided on the outer periphery of the lid 6.

The main body 1 thus formed is
As shown in FIGS. 2 (A) and 2 (B),
The locking portion 42 for preventing rotation of the rotor 4 and the locking portion 33 for preventing rotation of the casing 3 are engaged in a state of being wound around the winding portion 44. Therefore, the rotor 4 in this state receives the winding elasticity of the mainspring 5, and the locking portion 42 for preventing rotation of the rotor 4 and the locking portion 3 for preventing rotation of the casing 3.
When the engagement with the casing 3 is released, the winding elasticity of the mainspring 5 causes the casing 3 to move relative to the casing 3 in FIG.
Rotate clockwise. Grease or the like is inserted between the casing 3 of the main body 1 and the rotor 4 so that the casing 3
The function of the mainspring spring 5 and the rotor 4 may be prevented from deteriorating, and may be changed as appropriate.

In the present embodiment, the mounting member 2 is composed of a front mounting member 2a and a rear mounting member 2b which are substantially symmetrical in the front-rear direction as shown in FIG. . Each includes plate portions 21, 21, mounting member mounting portions 22, 22 formed below plate portions 21, 21, and main body mounting portion 23 formed above plate portions 21, 21. 2
3 respectively. Connection holes 21a, 21a are provided on both left and right sides of the plate portion 21 of the front mounting member 2a, respectively. On the other hand, on both left and right sides of the plate portion 21 of the rear mounting member piece 2b, connecting pieces 21b, 21 projecting forward from the front end are provided.
b are provided respectively, and these connection pieces 21b, 21
b At the tip of each, fitting claws 21c, 21c are provided to protrude upward. The front mounting member piece 2a and the rear mounting member piece 2b are fitted back and forth, so that the fitting claws 21c, 21b of the connection pieces 21b, 21b are fitted as shown in FIGS.
c enters the connection holes 21a, 21a from below and connects them, whereby the front mounting member piece 2a and the rear mounting member piece 2
b and one attachment member 2 is formed. Further, the front mounting member piece 2a and the rear mounting member piece 2b are respectively provided with hook holes 21d and 21d formed in the plate portions 21 and 21,
Fitting claws 21c, 2 inserted into connection holes 21a, 21a
1c is pressed downward, and each hook hole 2
The tool can be easily divided by hooking a tool or the like on 1d and 21d and pulling them in the retreating direction. Further, each of the plate portions 21, 21 is provided with a semicircular rotor insertion hole 23, 23, and by connecting the two plate portions 21, 21, two rotor insertion holes 23, 23 are formed. 2
3 forms one circular hole large enough to pass through the lower periphery of the rotor 4.

The mounting member mounting portions 22, 22 are for non-rotatably mounting to the mounting member on which the member to be mounted is mounted. In this embodiment, the mounting member mounting portion 22 of the front mounting member piece 2a is As shown in FIG. 6B, a front piece 22a extending downward from the front end of the plate portion 21 and a front piece 22a
And a lower piece 22b extending rearward from the lower end of the lower end of the plate portion 61 to form a U-shaped cross-section insertion opening 22 opened on the rear side below the plate portion 61. The mounting member mounting portion 22 of the rear mounting member piece 2b includes a rear piece 22c extending downward from the rear end of the plate portion 21 and a lower piece 22d extending rearward from the lower end of the rear piece 22c. Thus, a fitting portion 22 having a U-shaped cross section opened at the front side surface is formed. The distance L between the front piece 22a and the plate portion 21 and the distance L between the rear piece 22c and the plate portion 21 of each of the insertion portions 22, 22 of this embodiment are different from those of the railway rail 101 shown in FIG. Plate-shaped part 1 of holding spring 103 used for fixing
The thickness of the plate spring 102 is set to be substantially the same as the thickness of the plate spring 102, so that the front end and the rear end of the plate-like portion 102 of the holding spring 103 can be fitted.

The main body mounting portions 23, 23 of the front mounting member piece 2a and the rear mounting member piece 2b are for mounting the main body portion 1 so as to be non-rotatable.
23a. Each of the fitting pieces 23a, 23a
The front mounting member 2a and the rear mounting member 2b are connected to each other to form a single cylindrical shape. A main body receiving portion 26 into which the casing 3 of the main body 1 can be fitted is defined. Also, at the lower end in the main body receiving portion 26,
A plurality of engaging teeth 26a... 26a are provided. The engaging teeth 26a ... 26a engage with the teeth 36 ... 36 of the casing 3 of the main body 1 received in the main body receiving portion 26, so that the teeth 36 ... 36 of the casing 3 and the main body 1 Are formed at the right and left centers of the upper surfaces of the plate portions 21, 21 on the radial inside of the fitting pieces 23a, 23a so as to be meshable with the teeth 36,. On the other hand, the upper ends of the fitting pieces 23a, 23a are provided with flanges 23b, 23b projecting radially inward along the fitting pieces 23a, 23a. The engaging teeth 26a... 26a are not limited to those arranged at the left and right center positions of the upper surfaces of the plate portions 21 and 21, and are not limited to those formed on a part of the upper surfaces of the plate portions 21 and 21, It may be formed over the entire circumference of the upper surface of the plate portions 21, and may be changed as appropriate.

Next, a method of using the automatic screw tightening device of the first embodiment will be described by taking as an example a case where the automatic screw tightening device is used for a rail fixing bolt n for fixing a rail 101 of a railway shown in FIG. In this case, the holding spring 103 is used as a mounting member, and the holding spring 103
Then, the mounting member 2 is mounted. First, the front mounting member 2a
The front end of the holding spring 103 is fitted into the fitting insertion portion 22 from the front side.
And the rear end of the holding spring 103 is fitted into the fitting portion 22 of the rear mounting member 2b from the rear side. Then, the fitting portion 22 of the rear mounting member 2b is inserted.
At approximately the same time when the rear end of the holding spring 103 has been fitted in the connecting pieces 21b, 21b of the rear mounting member piece 2b.
The fitting claws 21c, 21c naturally enter the connection holes 21a, 21a of the front attachment piece 2a from below. Thus, the main body receiving portion 260 is defined at the center between the front mounting member piece 2a and the rear mounting member piece 2b, and the rail fixing bolt n is arranged below the main body receiving portion 260. The holding spring 103 can be fixed in a non-rotatable state. Therefore, the front mounting member piece 2a and the rear mounting member piece 2b
Can be simply fitted to the holding spring 103, and the mounting work can be facilitated.

Next, the main body 1 is pushed into the main body receiving portions 26 of the main body mounting portions 23 of the fixed mounting member 2 from above. At this time, the main body mounting portions 23, 2
The diameter of the flanges 23b, 23b of the casing 3 is the casing 3 of the main body 1.
If it is difficult to push in by hand, the cover 6 of the main body 1 may be pushed in by hitting it with a hammer or the like, so that the fitting pieces 23a of the main body mounting portions 23, 23, 23a is divided into two, so that the fitting piece 2
3a and 23a are bent and can be easily pushed in.

The main body 1 is attached to the main body mounting portions 23, 2
3A, the head of the rail fixing bolt n to which the pressing spring 103 is fixed is engaged with the engaging portion 41 of the rotor 4 in the main body 1 as shown in FIG.
The outer periphery of the lower end of the rotor 4 enters the rotor insertion holes 23 a, 23 a of the mounting member 2 and comes into contact with the upper surface of the holding spring 103. When the main body 1 is further pushed in from that state, only the casing 3 of the main body 1 is pushed down as shown in FIG. 7 (B). The downward movement of the casing 3 causes the flange locking grooves 62 of the lid 6 to be inserted into the flanges 23b, 23b of the main body mounting portions 23, 23.
Are inserted by elasticity, and the teeth 36... 36 of the casing 3 and the engaging teeth 26 a.
6a mesh with each other. Thereby, the casing 3 is prevented from coming off upward by the flange portions 23b, 23b, and is prevented from rotating in the main body receiving portion 26 due to the meshing of the teeth 36 ... 36, 26a ... 26a. And
Maintain its position within the body receptacle 26. On the other hand, both teeth 36 ... 36, 26a accompanying the downward movement of the casing 3
Approximately at the same time as the meshing of 26a, the detent locking portion 42 of the rotor 4 which has been engaged with the detent locking portion 33 of the casing 3 is disengaged from the detent locking portion 33, and the mainspring spring 5
Causes the rotor 4 to rotate, and applies the rotational force to the head of the rail fixing bolt n engaged with the engaging portion 41. Thereby, the rail fixing bolt n can be maintained in a state of being urged in the tightening direction. Therefore, after that, for example, when the vibration is repeatedly applied to the rail 101 and the tightening torque of the rail fixing bolt n starts to decrease,
At the same time, the rail fixing bolt n can be automatically tightened by the elastic force of the mainspring 1, and a constant tightening torque can be constantly maintained. still,
When removing the automatic screw tightening device of the present invention from the rail fixing bolt n, as described above, the connection pieces 21b, 21b of the rear mounting member 2b which have entered the connection holes 21a, 21a of the front mounting member 2a. It is only necessary to remove the fitting claws 21c, 21c to separate the front mounting member piece 2a and the rear mounting member piece 2b, whereby the main body 1 can be removed from the mounting member and the main body 1 can be fixed to the rail. Bolt n. Therefore, even if it becomes necessary to remove the rail fixing bolt n from the sleeper, it can be easily removed.

By performing as described above, the main body 1 can be fixed to the holding spring 103, which is difficult to drive a nail, and the mounting operation can be facilitated. Further, when used for the rail fixing bolt n, there is a possibility that a large amount of iron powder and dust may be covered. However, the lid 6 can prevent the casing 3 from entering the casing 3 and impair the functions of the spring and the like. This can prevent the rail fixing bolt n from being urged in the tightening direction.

In the first embodiment, teeth 36... 36 provided on the casing 3 and engaging teeth 26 a. However, the present invention is not limited to this configuration, and any configuration may be used as long as the casing 3 of the main body 1 that has entered the main body receiving portion 26 can be non-rotatably engaged. (B) As shown in (B), longitudinal grooves 27, 27 projecting radially outward are provided along the vertical direction on the inner peripheral surface of the fitting pieces 23a, 23a forming the main body receiving portion 26 of the mounting member 2. At the same time, longitudinal grooves 27, 2
7, a ridge (not shown) is provided.
The casing 3 is pushed into the main body receiving portion 26 while being inserted into the main body 7 or 27, or a part is cut and raised from the plate to form a projection, and the projection is attached to the lower surface of the casing 3; A projection that can be engaged or a projection receiving recess that can receive the projection may be formed, and may be appropriately changed.

In the present embodiment, the cover 6 is provided on the main body 1. However, the present invention can be carried out without the cover 6, and when the cover 6 is not provided, the outer peripheral surface of the casing 3 is provided with a flange. A stopper groove 62 is provided, or as shown in FIG. 9, the upper end of the casing 3 of the main body 1 that has entered the main body receiving portion 26 is pressed by the flanges 23b, 23b, and the main body 1 is moved up and down with respect to the mounting member 2. You may not be able to move. In the case where the lid 6 is provided, the lid 6 is not limited to the form in which the lid 6 is screwed to the casing 3 and attached as in the above-described embodiment.
For example, as shown in FIG. 9, after the upper end of the casing 3 of the main body 1 that has entered the main body receiving portion 26 is pressed by the flanges 23b, 23b, the lid 6 made of a cap is placed on the upper part of the mounting member 2 from above. It may be changed as appropriate.

The mounting member for mounting the mounting member mounting portion of the mounting member 2 is a rail 101 of a railway in this embodiment.
Is used as the holding spring 103, but if it is used for another thing, it is sufficient if it is a member side on which a bolt or the like is attached. For example, a plate generally used when tightening a bolt or a nut is used. The seat 9 may be attached to the seat 9 or a plate-shaped seat 9 for exclusive use. For example, FIG.
As shown in the figure, when a bolt is tightened on a steel frame, a seat 9 is arranged between the steel frame m and the bolt n, and the bolt n is tightened to a certain extent, and the bolt 9 is mounted between the seat 9 and the steel frame m. Member 2
Are formed in a state in which a gap is formed such that the insertion portions 22 and 22 can be inserted.
2 and 22 are set, and the main body 1 is pushed in. As a result, the rotor 4 is disengaged from the casing 3 and the bolt n
Is tightened into the steel frame m by receiving the rotational force from the rotor 4. When the fitting portions 22, 22 of the mounting member 2 are set, the seat 9 is not fixed to the steel frame m, and may rotate together.
After setting 2, the lower nut n1 screwed to the bolt n is tightened to such an extent that a resistance acts between the mounting member 2 and the steel frame m. Thus, when the rotor 4 and the casing 3 are disengaged from each other, the rotor 4 rotates with respect to the casing 3 receiving resistance from the steel frame m to tighten the bolt n, and the seat 9 to the steel frame m. The bolt n can be pressed and fixed, and the bolt n can be biased. Further, when there is a possibility that the nut n1 rotates together when the rotor 4 tightens the bolt n, the nut n1 may be locked by a tool or the like.

Next, a second embodiment will be described. The automatic screw tightening device according to the second embodiment includes a main body 100 and an attachment member 200, as in the previous embodiment. The main body 100 according to this embodiment is spirally wound. And a holding member 120 that holds the mainspring 110 in a state of being wound and elastic. The inner peripheral end of the spiral spring 110, ball
An engaging portion 111 is provided as an engaging means capable of non-rotatably engaging the nut and the nut n . This engaging portion 111
Is formed by bending the inner peripheral end of the mainspring 110 into a hexagonal shape. The engaging means is not limited to a form in which the end of the mainspring spring 110 is bent and formed. For example, the inner peripheral end of the mainspring spring 110 is attached to the rotor 4 having the same engaging portion 41 as in the previous embodiment. Alternatively, an engagement piece may be provided to engage with a groove provided in a bolt or a nut , and further, a bolt or a nut may be attached to an inner peripheral end of the mainspring spring 110 in advance.

A locking piece 112 for locking to the mounting member 200 is provided on the outer peripheral end of the mainspring 110. The locking piece 112 is formed by bending the outer peripheral end of the mainspring 110 into a substantially U-shape.

The holding member 120 is formed of a string-shaped member, and is wound around the entire outer periphery of the mainspring spring 110 having a winding elasticity, thereby preventing expansion of the mainspring spring 110 due to elasticity.
0 is maintained in a state having winding elasticity.

Similar to the first embodiment, the mounting member 200 is composed of two parts: a front mounting member piece 200a and a rear mounting member piece 200b, which are substantially symmetrical and are opposed to each other. . Each includes plate portions 210, 210, mounting member mounting portions 220, 220 formed below plate portions 210, 210, and main body mounting portion 230 formed above plate portions 210, 210. 230 respectively. The plate portion 210 of the front mounting member piece 200a is provided with connection holes 210a, 210a, and the rear mounting member piece 200b
The plate portion 210 is provided with connection pieces 210b, 210b having fitting claws 210c, 210c. These have the same configuration as that of the first embodiment, and fitting claws 210c, 210c are fitted in the connection holes 210a, 210a.
As a result, the front mounting member piece 2a and the rear mounting member piece 2b are connected to form one mounting member 200.
The front mounting member 200a and the rear mounting member 20
0b also has the hook holes 21 as in the first embodiment.
d and 21d (see FIGS. 6A and 6B) may be provided so that they can be easily divided after connection. Also, each plate portion 210,
210 has semicircular rotor insertion holes 230, 230.
The two plate portions 210 are connected to each other, so that the two rotor insertion holes 230 form one circular hole.

The mounting members 220, 220 have the same configuration as that of the first embodiment. Specifically, the mounting member mounting portion 220 of the front mounting member piece 200a is
The lower surface of the plate portion 210 is constituted by a fitting portion 220 having a U-shaped cross section and opened on the rear side below the plate portion 210 by the lower portion 20a and the lower piece 220b. The mounting member mounting portion 220 of the rear mounting member piece 200b is formed of a U-shaped cross-section insertion opening 220 having a front side face opened by a rear piece 220c and a lower piece 220d.

The front mounting member 200a and the rear mounting member 20
0b are attached to the side wall 2
40a and 240a are provided. Side walls 240a, 240
a, each of which extends upward from the plate portions 210, 210 and has a semicircular cross-section, and forms a single cylindrical body by connecting the front mounting member piece 200a and the rear mounting member piece 200b. Then, a main body receiving portion 260 that can receive the mainspring spring 110 of the main body portion 1 is formed therein. The side wall 240a of the front mounting member 200a has a spring locking groove 2
41 are provided. The spring locking groove 241 is for locking the locking piece 112 of the mainspring 110, and is formed from the upper end of the side wall 240a to the plate portion 210. Further, the lower end side of the spring locking groove 241 is
The locking piece 112 of the mainspring 110 is inserted into the lower surface of the plate portion 210 by communicating with a through hole 211 formed in the plate 10.

The automatic screw tightening device of the second embodiment is
For example, to use the rail fixing bolt n described in the first embodiment, the following procedure is performed. First, the front mounting member 200a and the rear mounting member 200b are fixed to the holding spring 103 in the same manner as in the first embodiment. As a result, as shown in FIGS. 12A and 12B, the main body receiving portion 260 is sectionally formed at the center between the front mounting member piece 200 a and the rear mounting member piece 200 b, and The state is such that the rail fixing bolt n is arranged at the lower part. Next, the mainspring 110 is inserted into the main body receiving portion 260 from above. To insert the mainspring 110 into the main body receiving portion 260, the engaging portion 111 of the mainspring spring 110 and the rail fixing bolt n in the main body receiving portion 260 are positioned above the main body receiving portion 260. The locking piece 112 and the spring locking groove 241 are aligned, and the spring 110 is pressed down to the main body receiving portion 260 from that state. At this time, the mainspring 110 may be pushed down by hand or the like.
(A) A plate-shaped auxiliary tool K as shown by a broken line is used therein, and if the upper side of the spring 110 is hit with the auxiliary tool K, the entire spring 110 can be simultaneously pressed downward and easily pressed down. It is preferable in that it can be performed.
When the mainspring spring 110 is pushed down, FIG.
As shown in FIG. 2 (B), the engaging portion 111 of the mainspring 110 is used.
Is attached to the head of the rail fixing bolt n,
The locking pieces 112 enter the spring locking grooves 241, respectively.
In FIG. 13 (a), only the mainspring 110 enters the main body receiving portion 260, leaving the holding member 120, without hitting the side wall 240a on the side of the spring locking groove 241 of the front mounting member piece 200a. The holding member 120 comes off from the upper side of the mainspring 110 as shown in FIGS. Accordingly, the rail fixing bolt n engaged with the engaging portion 111 by the winding elasticity of the mainspring spring 110 can be maintained in a state of being urged in the tightening direction. When there is a possibility that a large amount of iron powder, dust, or the like may be applied, the front mounting member piece 200a
Side walls 240a, 24 of the rear mounting member piece 200b
A lid may be placed on the upper end of Oa.

By performing as described above, the casing 100 and the rotor 4 do not need to be provided in the main body 100 as in the main body 1 of the first embodiment, a simple configuration is required, and the cost is low. Manufacturable and economical.

In the second embodiment, the side walls 240a, 240a of the front mounting member 200a and the rear mounting member 200b function as the casings 240a, 240a of the mainspring 110, respectively. It plays a role similar to that of the casing 3 in the embodiment, but can be implemented without the casing without the side walls 240a, 240a, and can be changed as appropriate.

In the second embodiment, the holding member 12
In the operation of inserting the mainspring 110 into the main body receiving portion 260, the mainspring 0 is naturally detached from the mainspring 110, but is not limited to this form. For example, the engaging portion 111 of the mainspring 110 is attached to the rail fixing bolt n.
The locking piece 112 of the mainspring 110 is inserted into the spring locking groove 241.
After each setting, the holding member 120 may be removed by cutting or the like, or may be changed as appropriate.

Also in the second embodiment, similarly to the first embodiment, it can be attached to the seat 9 as shown in FIG. 10 and can be changed as appropriate. The above is the description of the second embodiment.

In the first and second embodiments, the mounting members 2 and 200 are replaced with the front mounting member pieces 2 having a substantially symmetrical shape.
a, 200a and the rear mounting member pieces 2b, 200b, but the present invention is not limited to this form, and one or a plurality of them may be used. In the case of two parts, the structure is not limited to two equal parts, but may be two parts of asymmetric large and small, and may be changed as appropriate.

The biasing member 5 is not limited to the one formed by the mainspring 5, but may be a spring having a winding elasticity by, for example, winding a steel wire into a spiral shape. Can be used as appropriate.

Furthermore, the mounting member mounting portions of the mounting members 2 and 200 are not limited to those having the form of the fitting portions 22 and 220, and may be of the form fixed to the mounting member with bolts or the like. . However, when using bolts or the like, work efficiency is deteriorated, and thus, it is preferable to employ the fitting portions 22, 200 as in the above-described embodiment in that the fixing operation can be easily performed. Also, the front mounting member pieces 2a, 200a
As for the means for connecting the rear mounting member pieces 2b, 200b, the fitting claws 21c, 210c and the connection holes 21a, 210
a, it is also possible to use a bolt or the like, but in this case, too, the work efficiency deteriorates, so the fitting claws 21c and 210c and the connection hole 21
a, 210a and the front mounting member pieces 2a, 200
a Fitting portions 22, 22 of the rear mounting member pieces 2b, 200b
If the end of the mounting member is inserted into the fitting claw 21
It is preferable that the connection holes 21a and 210a fit into the connection holes c and 210c so that the connection can be performed, thereby improving the working efficiency. In addition, the mounting portion for the mounting member is
2, 220, the plate portions 21, 21
0, the front piece 220a and the lower piece 220b
1, 210, rear pieces 22c, 220c and lower piece 22
d, 220d are not limited to being integrally formed, but the plate portions 21, 210 may be provided with the front piece 220a and the lower piece 22a.
0b may be attached to the plate portion 210 with the rear pieces 22c and 220c and the lower pieces 22d and 220d attached to the plate portions 21 and 210 so as to be slidable in the left-right direction, and may be changed as appropriate.

On the other hand, the application of the automatic screw tightening device of the present invention is not limited to the case where it is used for the rail fixing bolt n for fixing the rail 101 of the railway as described above, but is applicable to various bolts and nuts. it can. Further, the automatic screw tightening device of the present invention makes it impossible to easily rotate the mounting member to which the bolt or nut is mounted, even when the mounting member to which the bolt or nut is mounted is difficult to drive a nail or the like, such as metal or concrete. It can be attached, and is particularly suitable for bolts and nuts mounted on such a mounting member that is difficult to drive such as nails. However, it can also be used for bolts and nuts mounted on wood and the like, and can be appropriately changed.

[0048]

As described above, according to the first aspect of the present invention, the mounting member mounting portions 22, 22 of the mounting member 2 may be mounted on the mounting members 103, 9, and for example, the mounting member mounting portions 22, 22 are provided.
Can be attached to the mounting members 103, 9 made of metal or concrete, which are difficult to drive nails into, by fitting each of the opposite ends of the mounting members 103, 9 into.

The second invention of the present application is an effect of the first invention of the present application.
In addition, the opposite ends of the mounting members 103 and 9 may be fitted into the fitting portions 22 and 22 of the mounting member pieces 2a and 2b, thereby connecting the mounting member pieces 2a and 2b to each other. Thus, it can be non-rotatably attached to the mounting members 103 and 9. Therefore, work such as screw tightening is not required at all, and the work of attaching to the mounting members 103 and 9 can be facilitated.

According to the third invention of the present application, the mounting members 2 , 220 are mounted on the mounting members 103, 9, and the main body receiving portions 26, 26 are mounted.
0 may receive the main body parts 1 and 100, and the urging member 5
Bolts and nuts n can be biased by the biasing force of
Bolts and nuts n can be tightened,
Work can be made easier.

The fourth invention of the present application relates to the mounting member pieces 2a, 2b
After the main body 1 is received by the main body receiving portion 26 after the main body 1 is mounted on the mounting members 103 and 9, the bolts and nuts n engaged with the engaging portions 41 of the rotor 4 are It can be in an energized state, and the work can be facilitated.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an automatic screw tightening device according to a first embodiment of the present invention.

FIG. 2 (A) is a plan view of a main body with a cover removed, and FIG. 2 (B) is a cross-sectional view taken along the line II-II of FIG. 2 (A).

3 (A) is a plan view of the rotor, FIG. 3 (B) is a front view of the rotor, and FIG. 3 (C) is a bottom view of the rotor.

FIG. 4 (A) is a front view of a casing, and FIG.
(B) is a bottom view of the casing.

FIG. 5 (A) is a front view of the lid, and FIG. 5 (B) is a central longitudinal sectional view of the lid.

6 (A) is a plan view showing a state in which a front mounting member piece and a rear mounting member piece are connected, and FIG. 6 (B) is a view taken along the line VI-VI in FIG. 6 (A).
It is a line sectional view.

7 (A) is a cross-sectional explanatory view when the main body is pushed into the main body receiving portion of the mounting member, and FIG. 7 (B) is a state in which the main body is inserted into the main body receiving portion of the mounting member. FIG.

8 (A) is a plan view of another embodiment of the mounting member, and FIG. 8 (B) is a sectional view taken along line VIII-VIII of FIG. 8 (A).

FIG. 9 is a cross-sectional view of an entire automatic screw fastening device according to still another embodiment.

FIG. 10 is a cross-sectional view of still another screw automatic tightening device as a whole.

FIG. 11 is an exploded perspective view of an automatic screw tightening device according to a second embodiment of the present invention.

FIG. 12A is an explanatory view when the main body according to the second embodiment is inserted into the main body receiving portion of the mounting member;
FIG. 12B is a plan view of FIG.

FIG. 13A is a cross-sectional view of a state in which a main body according to the second embodiment has entered a main body receiving portion of an attachment member, FIG.
FIG. 3 (B) is a plan view thereof.

FIG. 14 is an explanatory view showing a state in which a rail is fixed by pressing a pressing spring with a rail fixing bolt.

FIG. 15 is a cross-sectional view of a conventional building blade bolt.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Main body part 2 Mounting member 2a Front mounting member piece 2b Rear mounting member piece 3 Casing 4 Rotor 5 Mainspring 6 Cover 21a, 21a Connection hole 21c, 21c Fitting claw 22 Mounting member mounting portion 23 Body mounting portion 26 Body Receiving part 26a Engaging teeth 36 teeth n bolts and nuts

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-173930 (JP, A) JP-A-7-208437 (JP, A) JP-A-4-327016 (JP, A) 96530 (JP, U) Japanese Utility Model Showa 51-78503 (JP, U) Japanese Utility Model Showa 51-61605 (JP, U) Japanese Utility Model Utility Model Hei 3-65704 (JP, U) Japanese Utility Model Showa 45-17685 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16B 39/02

Claims (4)

(57) [Claims] A body (1) (100) and a mounting member (2) (200) are provided, and the body (1) (100) urges a bolt or a nut (n) in a tightening direction. biasing member for (5) (110) includes a biasing member (5) by one end of the (110) are engaged non-rotatably engaged with the bolts and nuts (n), bolts and nuts (n) Is tightened by the urging force of the urging members (5) and (110), and the mounting members (2) and (200) rotate to the mounting members (103) and (9) on which the bolts and nuts (n) are mounted. Mounting members (22), (22), (220), and (220) for mounting members that can be immovably mounted.
0) is locked to the other end side of the urging members (5) and (110) of the main body parts (1) and (100), whereby the urging members (5) of the main body parts (1) and (100) are locked.
The other end of (110) is attached to the mounting member via the mounting members (2) and (200).
(103) (9) der those fixed to is, the main body (1) at least one of the (100) and mounting member (2) (200), the casing (3) (240a) (240a) A biasing member (5) (110) is arranged in the casing (3) (240a) (240a), and the other end of the biasing member (5) (110) is
(3) (240a) (240a)
a) (240a) cannot be rotated by the mounting members (2) and (200), and the mounting members (2) and (200) have at least two mounting member pieces (2a) (2b) (200a) and (200b). ), And these mounting member pieces (2
a) (2b) (200a) (200b), each connecting means (21a) (21c) (210a)
(210c), and the connecting members (21a) (21c) (210a) (210c) are connected to each other by the mounting member pieces (2a) (2b) (200a) (200b), whereby the mounting member ( 103) An automatic screw tightening device fixed to (9). 2. A fitting portion (22) for fitting each of the opposite ends formed on the mounting members (103) and (9) with each of the mounting member pieces (2a) (2b) (200a) (200b). 22) (220) and (220), each of which is connected to each other by connecting means (21a) (21c)
(210a) and (210c), and the connecting means (21a) (21c) (210a) (2
10c), fitting members (103) (9) in the fitting portions (22) (22) (220) (220)
As each end of the fitting is fitted, the mounting member pieces (2a) (2b)
(200a) (200b) each connected to each other mounting members (103) (9)
請 characterized in that non-rotatably those are attached to
The automatic screw tightening device according to claim 1. Wherein the mounting member (2) (220), body portion (1) (10
The main body receiving portions (26) and (260) are capable of receiving the main body portions (1) and (100) with the main body receiving portions (26) and (260).
The other end of the biasing member (5) (110), together with attached to the mounting member (2) (220), one end of the biasing member (5) (110), Bo
3. The automatic screw tightening device according to claim 1, wherein the automatic screw tightening device is adapted to engage with a bolt or a nut (n) . 4. A housing comprising a main body (1) and a mounting member (2), wherein the main body (1) comprises a cylindrical casing (3) and a casing.
(3) a rotator (4) rotatably arranged in the axial direction so as to be movable in the vertical direction and a biasing member (5), and one end of the biasing member (5) is Connected to the casing (3),
By connecting the other end of the urging member (3) to the rotor (4), the rotor (4) is provided with a rotational force in the casing (3) by the urging force of the urging member (5). The rotor (4) is provided with an engaging portion (41) at the lower end so that the rotor (4) can non-rotatably engage with the bolt or nut (n), and the casing (3) and the rotor (4) ) Are provided with locking means (33) and (42) which can be engaged and disengaged, so that the rotor (4) is maintained in a biased state provided with a rotational force in the casing (3). As the rotor (4) is moved upward with respect to the casing (3), the engagement between the casing (3) and the rotor (4) is released, and the rotor is biased. The bolt or nut (n) engaged with the engaging portion (41) can be tightened by the urging force of the mounting member, and the mounting member (2) is at least two opposing mounting member pieces.
(2a) (2b), each of these mounting member pieces (2a) (2b),
At the lower end side, fitting portions (22) and (22) for fitting the opposite ends of the mounting members (103) and (9) are provided, and at the upper end side, the main body mounting portions (23) and (23) are provided, respectively. The mounting member pieces (2a) and (2b) include connection means (21a) and (21c) connected to each other, and the connection means
As (21a) and (21c) fit the ends of the mounting members (103) and (9) into the fitting portions (22) and (22), the mounting member pieces (2a) and (2b) are connected to each other. A main body receiving portion (26) is formed in the main body mounting portions (23) and (23) so as to receive the main body (1) in a non-rotatable manner, and the main body (1) is received in the main body receiving portion (26). Accordingly, the rotor (4) moves upward with respect to the casing (3) to release the lock between the casing (3) and the rotor (4). Tightening device.