JP5204681B2 - Spring brake device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spring brake device, which can brake a rotator with high reliability and can be manufactured with high production efficiency. <P>SOLUTION: In the brake device 60, one end part 607b, 608b of each coil spring 607, 608 is laid in a radially extended state, when force is received from each cylinder 603, 604 so that the force from the cylinder 603, 604 does not act thereon, or is laid in a radially contracted state when the force is loosened. An adjusting mechanism (an adjustment mechanism composed of a combination of a hooking block 609, 610 and an adjuster block 611, 612) is interposed each between a movable hook 607b, 608b in each coil spring 607, 608 and the cylinder 603, 604 to correct the angle in each winding direction of the coil spring 607, 608 therebetween. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a spring brake device, and more particularly to a hook retaining structure in a spring.

Conventionally, a spring brake device has been widely used as a brake against rotation or vertical movement of a rotating shaft (see, for example, Patent Documents 1 to 4). The main structure of the spring brake device according to the prior art will be described with reference to FIG.
As shown in FIG. 7A, the spring brake device is provided with a coil spring 1607 as a main element for executing a braking operation. The coil spring 1607 is provided in a state of winding the outer periphery of a rotary core 1606 provided integrally with the rotary shaft 1030.

  As shown in the enlarged portion of FIG. 7A, the coil spring 1607 is formed, for example, by winding a wire having a circular cross section a plurality of times, and one end (fixed hook) 1607a thereof is a knock pin 1615. It is being fixed to the fixed block 1602 via. On the other hand, the other end portion (movable hook) 1607b of the coil spring 1607 is movable in the coil winding direction by a cylinder or the like not shown.

  In the state where the force is not applied to the movable hook 1607b of the coil spring 1607 (refer to the enlarged portion of FIG. 7A), the spring spring 1607 causes the coil brake 1607 to tighten the rotary core 1606 in the radial direction. The rotating core 1606 is in contact with the outer peripheral surface 1606f. In this state, the rotating core 1606 is braked by the tightening force of the coil spring 1607, and the rotation stopped state of the rotating shaft 1030 is maintained.

On the other hand, when a force is applied to the movable hook 1607b of the coil spring 1606 and the inner diameter of the coil spring 1606 is expanded, a gap is generated between the coil spring 1607 and the outer peripheral surface 1606f of the rotating core 1606, thereby releasing the brake. The
In the spring brake device, the direction in which the brake is effective with respect to the rotation of the rotating core 1606 is set by the winding direction of the coil spring 1607 and the setting of the fixed hook 1607a. Specifically, when the coil spring 1607 shown in FIG. 7A is employed, the rotation in the left direction (counterclockwise) as seen by the arrow B is stopped, or the stopped state is maintained. Can do. Therefore, when applying a brake against rotation in the reverse direction, a coil spring having a reverse winding direction is employed, or a fixed hook and a movable hook in the coil spring 1607 are provided in reverse. It becomes possible.

Japanese Patent Publication No. 01-47656 Japanese Patent Publication No. 03-28607 Japanese Patent Publication No. 06-89797 Japanese Patent No. 4055759

    However, in the spring brake according to the related art, when the fixed hook 1607a or the movable hook 1607b is attached to the coil spring 1607, it is necessary to perform final assembly in accordance with the actual product due to manufacturing errors of the coil spring 1607. That is, as shown in FIG. 7B, when the fixed hook 1607a of the spring coil 1607 is first fixed by the knock pin 1615, a manufacturing error of the spring coil 1607 causes a phenomenon that the position of the movable hook 1607 varies.

Here, in the spring brake device, the relative relationship between the coil spring 1607 and the rotating core 1606 affects the braking performance, and the clearance between the outer peripheral surface 1606f of the rotating core 1606 and the coil spring 1607 when the brake is released. Is an important factor.
As described above, in the spring brake device according to the prior art, when assembling the coil spring in the manufacturing stage, it is forced to perform in-situ matching with other components, which has a problem from the viewpoint of production efficiency. .

  The present invention has been made to solve the above-described problems, and can stop the rotation of the rotating body with high reliability, or can maintain the stopped state, and can achieve high production efficiency. An object of the present invention is to provide a spring brake device that can be produced.

In order to achieve the above object, the present invention employs the following configuration.
The present invention has a coil spring that is mounted on a rotating body, and when the coil spring is in a reduced diameter state, the brake is effective and expands due to the contact (friction) resistance between the coil spring and the rotating body. A spring brake device in which a brake is released when in a radial state. One end of a coil spring is fixed to the device base, and the other end is connected to a movable body. And the coil spring receives the force from the said movable body in the said other end part, and can change a diameter (change of a spring winding diameter) freely.

Here, “one end part” and “the other end part” do not indicate one point of the end but an area having a certain length.
Further, in the spring brake according to the present invention, when the movable body applies a force to the other end of the coil spring, the coil spring is in a diameter-expanded state, and the movable body does not apply a force to the other end of the coil spring. Alternatively, when the applied force is relaxed, the coil spring is reduced in diameter. In the spring brake device according to the present invention, between the one end portion of the coil spring and the device base, or between the other end portion of the coil spring and the movable body, in the winding direction of the coil spring. An adjustment mechanism for correcting the angle is inserted as a structural feature.

  In the spring brake device according to the present invention, an adjustment mechanism is interposed between the one end portion of the coil spring and the device base, or between the other end portion of the coil spring and the movable body. The adjusting mechanism is inserted to correct the angle between the one end of the coil spring and the device base or between the other end of the coil spring and the movable body. is there. Therefore, in manufacturing the spring brake device according to the present invention, one end of the coil spring can be fixed or hooked, and the other end can be fixed or hooked via the adjusting mechanism.

  Here, as described above, the coil spring has a manufacturing error in its production, and the mutual angle of both ends from the design value may deviate from the design value. However, in the spring brake device according to the present invention, this is the case. The above manufacturing error of a simple coil spring can be corrected by an adjusting mechanism, so that it is not necessary to perform an assembling work with the actual product. Moreover, since the relative positioning of the coil spring with respect to the rotating body can be reliably performed using the adjusting mechanism, high reliability can be obtained.

Therefore, the spring brake device according to the present invention can brake the rotating body with high reliability and can be produced with high production efficiency.
In the above, the term “brake” is used in a concept including “holding brake”.
The spring brake device according to the present invention can employ the following variations.

  In the spring brake device according to the present invention, the adjustment mechanism is interposed between the other end of the coil spring and the movable body, and is configured by a combination of two ring-shaped blocks. One of them is provided with a groove or hole for hooking the other end of the coil spring, and the other is extended with a pin for receiving a force from the movable body toward the radially outer side. It is possible to adopt a configuration in which two ring-shaped blocks are fastened together with an angle correction between them.

  In the spring brake device according to the present invention, the adjustment mechanism is interposed between one end of the coil spring and the device base, and is configured by a combination of two ring-shaped blocks. One of them is provided with a groove or hole for hooking the other end of the coil spring, the other is fixed to the apparatus base, and the two ring-shaped blocks are compensated for angle between each other. It is possible to adopt a configuration in which they are tightly connected in a state where they are connected.

  Further, in the spring brake device according to the present invention, a bolt is projected from one of the two ring-shaped blocks toward the other ring-shaped block, and a hole allowing the insertion of the bolt is opened on the other. Thus, it is possible to adopt a configuration in which two ring-shaped blocks are fastened by bolts with bolts inserted through holes provided in the other ring-shaped block. And when employ | adopting this structure, the structure that the hole in the other ring-shaped block is a long hole in the winding direction of a coil spring is employable. When tightening the bolt and the nut, the angle correction can be performed using the long hole.

  In the spring brake device according to the present invention, the coil spring is configured with a wire having a rectangular cross section, and adopts a configuration in which surface contact is made with the rotating body when the brake is applied. be able to. Accordingly, it is possible to generate a higher frictional force than that of the coil spring (circular cross section) of the spring brake device according to the related art shown in FIG. 7, and to obtain a high brake characteristic.

  In the spring brake device according to the present invention, the coil spring is formed of a wire having a rectangular cross section, and the aspect ratio in the cross section of the wire is substantially “1”. Can do. When such a coil spring is employed, high brake characteristics and high response performance can be obtained. Even in the case of coil springs made of wires having the same rectangular cross section, the vertical and horizontal coverings are substantially “1”, that is, the square cross section has a higher response characteristic when the brake is applied, than the rectangular cross section. be able to.

  In the spring brake device according to the present invention, the second coil spring is mounted around the rotating body, one end of the second coil spring is fixed to the device base, and the other end. Receives the force from the second movable body and is movable in the winding circumferential direction, and the second coil spring has a direction in which the brake against the rotating body works with respect to the coil spring. A configuration that is the opposite can be adopted. As a result, even when the rotating body rotates in both forward and reverse directions, the brake can be applied corresponding to both directions.

  In the spring brake device according to the present invention, a configuration is adopted in which a regulating member for regulating the outer diameter is arranged on the winding outer periphery of the coil spring when the coil spring is in an expanded state. be able to. In the case of adopting such a configuration, it is possible to suppress an attempt to expand the diameter when the outer diameter of the spring varies due to variations in the manufacturing of the coil spring. A large gap can be secured.

  In the spring brake device according to the present invention, the coil spring is in a reduced diameter state in a free state (a state where no force is received), and the inner diameter thereof is smaller than the outer diameter of the rotating body. Can be adopted. When such a configuration is adopted, when the apparatus power supply is interrupted for some reason, the rotation of the rotating body can be stopped, which is excellent in terms of safety.

1 is a schematic perspective view showing a partial configuration of a rotary drive system 1 according to an embodiment. FIG. 2 is a plan view (partially sectional view) showing a configuration of a brake device 60 included in the rotation drive system 1. 4 is a schematic side view showing the structure of fixed hooks 607a and 608a of coil springs 607 and 608 in the brake device 60. FIG. (A) is a model perspective view which shows the structure of the movable hook 607b of the coil spring 607 in the brake device 60, and the structure of the latching block 609 and the adjuster block 611, (b) is the rotation core 606 and a coil spring. 6 is a schematic side view (partial cross-sectional view) showing a positional relationship with 607. FIG. (A) is a model front view which shows the coil spring 607 in the state by which the brake was applied, (b) is a model front view which shows the coil spring 607 in the state by which the brake was cancelled | released, (c) FIG. 5 is a schematic side view (partially sectional view) showing a positional relationship between the rotary core 606 and the coil spring 607 in a state where the brake is released. It is a top view (partial sectional view) showing a configuration of a brake device according to a modification. (A) is a schematic side view which shows the structure of the brake device based on a prior art, (b) is a schematic front view which shows the structure of the spring 1607. FIG.

The best mode for carrying out the present invention will be described below with reference to the drawings. Note that the embodiment described below is used as an example for easily explaining the structural features of the present invention and the effects obtained from the characteristic configurations. Except for essential features, there is no limitation on the following contents.
[Embodiment]
1. Overall Configuration The overall configuration of the rotary drive system 1 according to the present embodiment will be described with reference to FIG. FIG. 1 shows an extracted portion relating to rotational drive of the rotational drive system 1 according to the present embodiment.

As shown in FIG. 1, the rotational drive system 1 according to the present embodiment includes a single motor 10 and a brake device 60 connected thereto. A drive shaft 10 a extends from the motor 10, and a rotary shaft 30 is connected via a coupler 20.
The rotary shaft 30 is supported by two pillow blocks 40 and 50, and a brake device 60 disposed between the two pillow blocks 40 and 50 is inserted.

The motor 10 can rotate in both forward and reverse directions in accordance with instructions from a control unit (not shown).
2. Configuration of Brake Device 60 Next, the configuration of the brake device 60 that is the most structural feature of the rotational drive system 1 according to the present embodiment will be described with reference to FIG. FIG. 2 is a plan view (partially sectional view) showing a configuration of the brake device 60.

  As shown in FIG. 2, the exterior of the brake device 60 is configured by two side plates 600 and 601, a fixed block 602, cylinder blocks 603 and 604, and a cover plate 605. The two side plates 600 and 601 are provided with holes to which bearings 613 and 614 are attached, and the rotary shaft 30 is supported by the bearings 613 and 614.

  In the brake device 60, a rotating core 606 is attached to the rotating shaft 30. The rotating core 606 is rotatable together with the rotating shaft 30 and has a larger diameter than the rotating shaft 30. The rotating core 606 is provided with two coil springs 607 and 608, and the coil spring 607 and the coil spring 608 are set to have the same winding direction.

  The coil springs 607 and 608 have one end portions (hereinafter referred to as “fixed hooks”) 607 a and 608 a fixed to the fixed block 602 at a substantially center in the longitudinal direction (X-axis direction) of the rotary core 606. Yes. The other end portions (hereinafter referred to as “movable hooks”) 607 b and 608 b of the coil springs 607 and 608 are respectively connected to the cylinder blocks 603 and 604 via the latch blocks 609 and 610 and the adjuster blocks 611 and 612. It is attached to the movable part.

  The movable hooks 607b and 608b in the coil springs 607 and 608 are hooked in grooves 609b and 610b provided in the latching blocks 609 and 610, and the latching blocks 609 and 610 and the adjuster blocks 611 and 612 are latched. The bolts 609a and 610a installed in the blocks 609 and 610 are fixed by fastening the nuts 617 and 618.

  Lever pins 611a and 612a project from the adjuster blocks 611 and 612 toward the corresponding cylinder blocks 603 and 604, respectively. The movable parts (not shown in FIG. 2) in the cylinder blocks 603 and 604 apply force to the lever pins 611a and 612a, and the adjuster blocks 611 and 612 receive the force to wind the coil springs 607 and 608. Rotate in the direction. At this time, since the latching blocks 609 and 610 and the adjuster blocks 611 and 612 are fixed, the movable hooks 607b and 608b of the coil springs 607 and 608 are moved in the winding direction of the coil springs 607 and 608, The coil springs 607 and 608 change in diameter.

As shown in FIG. 2, the fixed block 602 and the cover plate 605 are formed with a small gap with respect to the outer surfaces of the coil springs 607 and 608, and the coil spring 607 is unnecessarily or distorted. , 608 serves to prevent the diameter from expanding. The said clearance gap exists in the range of 0.5 [mm]-1.0 [mm], for example.
3. Fixing of the fixing block 602 and the coil springs 607 and 608 in the brake device 60 A fixing form of the fixing block 602 and the coil springs 607 and 608 in the brake device 60 will be described with reference to FIG. 3A shows a fixed form of the fixed block 602 and the coil spring 607, and FIG. 3B shows a fixed form of the fixed block 602 and the coil spring 608. 3 is a diagram when the fixed block 602 and the coil springs 607 and 608 are schematically viewed as indicated by an arrow A in FIG.

  As shown in FIGS. 3A and 3B, in the coil springs 607 and 608, the fixed hooks 607a and 608a are wound respectively. As shown in FIG. 3A, in the coil spring 607, a fixed hook 607a extends to the left side in the Y-axis direction from a portion that is an upper part in the Z-axis direction with respect to the rotary core 606, and a tip portion thereof is It has been wound almost once.

On the other hand, as shown in FIG. 3B, in the coil spring 608, a fixed hook 608a extends to the left side in the Y-axis direction from the lower part in the Z-axis direction with respect to the rotary core 606, and the tip thereof The part is wound approximately once as described above.
As shown in FIGS. 3A and 3B, the fixing hooks 607 a and 608 a in the coil springs 607 and 608 are fixed to the fixing block 602 with knock pins 615 and 616, respectively. In the present embodiment, by adopting such a fixed form, unnecessary force is not applied to the coil springs 607 and 608, and the coil springs 607 and 608 are prevented from being distorted.

  For example, as shown in FIGS. 3 (a) and 3 (b), when fixing these fixing hooks so as to be sandwiched from above and below in the Z-axis direction without winding the tip end portions of the fixing hooks, the coil springs are expanded. When making the diameter state, it is expected that the coil spring will be distorted depending on the degree of tightening related to the fixing, which may cause a problem from the viewpoint of brake characteristics.

On the other hand, in the case of adopting the fixing form as in the present embodiment, it is possible to create “nige” in the upper and lower directions in the Z-axis direction on the fixing hooks 607a and 608a of the coil springs 607 and 608. And it can have a high brake characteristic.
4). Latching blocks 609 and 610 and adjuster blocks 611 and 612 in the brake device 60
As described above, in the brake device 60 according to the present embodiment, when the coil springs 607 and 608 are connected to the cylinder blocks 603 and 604, the latching blocks 609 and 610 and the adjuster blocks 611 and 612 are interposed therebetween. It is inserted. The latch blocks 609 and 610 and the adjuster blocks 611 and 612 serve as an adjustment mechanism for correcting the angle in the winding direction of the coil springs 607 and 608 by combining these. A specific configuration will be described with reference to FIG. 4A by taking the coil spring 607, the latch block 609, and the adjuster block 611 as an example.

  As shown in FIG. 4A, the latching block 609 and the adjuster block 611 are both ring-shaped plate bodies, and the rotating shaft 30 or the rotating core 606 is inserted through the center hole. . In the latching block 609, a groove portion 609b is provided on a part of the outer periphery thereof. The groove portion 609b is formed in accordance with the cross-sectional shape of the movable hook 607b of the coil spring 607, and the tip end portion of the movable hook 607b of the coil spring 607 is hooked on this portion.

Two bolts 609a are planted from the left main surface in the X-axis direction of the latching block 609 toward the left side in the X-axis direction. The two bolts 609a are provided longer than the thickness of an adjuster block 611 described later.
As shown in FIG. 4A, the adjuster block 611 is provided with two insertion holes 611 b corresponding to the two bolts 609 a of the hooking block 609. The two insertion holes 611b are long holes in the circumferential direction. Therefore, when the latch block 609 and the adjuster block 611 are tightened, the relative angle in the circumferential direction between the latch block 609 and the adjuster block 611 can be corrected by using the insertion hole 611b of the adjuster block 611. When these are assembled, the nut 617 (see FIG. 3) is screwed to the bolt 609a after correcting the angle between them.

A lever pin 611a extends from the outer periphery of the adjuster block 611 toward the cylinder block 603 side (back in the Y-axis direction).
In addition, each form of the coil spring 608, the latch block 610, and the adjuster block 612, the latch form, etc. are the same as the above.
As described above, in the brake device 60 according to the present embodiment, when the brake device 60 is manufactured, the movable hooks 607b and 608b of the coil springs 607 and 608 are engaged with the cylinder blocks 603 and 604 and the latch block as an adjusting mechanism therebetween. 609 and 610 and adjuster blocks 611 and 612 are connected via a combination structure.

  The coil springs 607 and 608 produce a manufacturing error in their production, and the angle between the hooks at both ends may deviate from the design value from the design value. However, in the brake device 60 according to the present embodiment, this is the case. Since the above manufacturing error of the coil springs 607 and 608 can be corrected by the adjusting mechanism, it is not necessary to perform the assembling work with the actual product. Moreover, since the relative positioning of the coil springs 607 and 608 with respect to the rotary core 606 can be reliably performed using the adjustment mechanism, high reliability can be obtained.

5. Configuration of Coil Springs 607 and 608 The configuration of the coil springs 607 and 608 will be described using the coil spring 607 as an example with reference to FIG.
FIG. 4B is a schematic side view showing the relative relationship with the rotating core 606 when the movable hook 607b of the coil spring 607 is not subjected to force and is in a reduced diameter state.

  As shown in FIG. 4B, the coil spring 607 is formed of a wire having a rectangular cross section. More specifically, as shown in a portion surrounded by a two-dot chain line in FIG. 4B, the ratio (aspect ratio) between the height H and the width W of the wire constituting the coil spring 607 is substantially “1”. That is, it has a square cross section. The aspect ratio does not necessarily need to be substantially “1”. However, compared to the case of using a wire having a rectangular cross section, the aspect ratio is set when the brake is applied or when the brake is applied and when the brake is applied. Excellent in terms of response when canceling.

  Further, in the present embodiment, since the coil spring 607 made of a wire having a square cross section is employed, the contact area with the outer peripheral surface 606f of the rotary core 606 can be increased. That is, in the case of a coil spring 1607 made of a wire having a circular cross section like the brake device according to the prior art shown in FIG. 7A, the contact with the outer peripheral surface 1606f of the rotating core 1606 is a line contact. In the present embodiment, by using a coil spring 607 made of a wire having a square cross section, the contact with the outer peripheral surface 606f of the rotary core 606 can be made a surface contact. For this reason, the braking effectiveness can be increased.

The coil spring 608 has the same configuration as described above.
6). Brake Operation of Brake Device 60 The brake operation of the brake device 60 will be described with reference to FIG. 5A is a schematic front view showing the latching block 609 and the adjuster block 611 when the brake is applied, and FIG. 5B is the latching block when the brake is released. 609 and the adjuster block 611 are also schematic front views, and (c) is a schematic cross-sectional view showing the rotating core 606 and the coil spring 607 in a state where the brake is released.

  As shown in FIG. 5A, when the movable portion 603a in the cylinder block 603 is at the lower part in the Z-axis direction, the tip of the latch pin 611a is also in that portion. In this state, the tip of the movable hook 607b of the coil spring 607 is oriented between “1 o'clock” and “2 o'clock” as shown in FIG. 5A, and the coil spring 607 is not compressed. It is in a diameter state. In this state, the rotating core 606 and the coil spring 607 are in contact with each other as shown in FIG. 4B, and the brake is applied with the frictional force therebetween.

  Next, as shown in FIG. 5 (b), when the movable portion 603a of the cylinder block 603 is at the upper part in the Z-axis direction, the tip of the lever pin 611a that is hooked is also in that portion, and the movable hook of the coil spring 607 The tip end portion of 607b faces the direction between “2 o'clock” and “3 o'clock” as shown in FIG. In this state, the coil spring 607 is in an expanded state as shown in FIG. 5C, and a gap t is generated between the outer peripheral surface 606 f of the rotary core 606 and the coil spring 607.

The gap t is represented by (D ₁ -D ₀ ) / 2.
Here, D ₁ is the inner diameter of the coil spring 607 when in the diameter-expanded state, and D ₀ is the outer diameter of the rotating core 606.
The coil spring 608 has the same configuration, and moves similarly by driving the cylinder block 604.

In the brake device 60 according to the present embodiment, the brake is applied by the change between the states of FIGS. 5A and 4B and the states of FIGS. 5B and 5C. And a state in which the brake is released are realized.
[Modification]
Next, the structure of the brake device according to the modification will be described with reference to FIG. FIG. 6 is a view corresponding to FIG. 2 used when describing the brake device 60 of the above embodiment. In FIG. 6, a side plate in the brake device is omitted.

As shown in FIG. 6, in the brake device according to this modification, the main difference in configuration from the brake device 60 according to the above embodiment is that the winding directions of the coil springs 657 and 658 and the coil are associated therewith. Rotating cores 656 and 669 are provided corresponding to the springs 657 and 658, respectively.
The coil spring 657 and the coil spring 658 are wound in opposite directions. Specifically, the coil spring 657 located on the left side in the X-axis direction is wound to the right with respect to the rotary core 656, while the coil spring 658 located on the right side in the X-axis direction is wound around the rotary core. It is wound to the left with respect to 669. In the coil spring 657 wound rightward, the end on the left side in the X-axis direction is a fixed hook 657a, and is fixed to the fixed block 652 with a knock pin 665.

  On the other hand, the coil spring 658 wound leftward also has a fixed hook 658 a at the left end in the X-axis direction, and is fixed to the fixed block 670 with a knock pin 666. Here, the end portions of the fixed hooks 657a and 658a in the coil springs 657 and 658 are wound in the same manner as shown in FIG. 3, and the knock pins 665 and 666 are inserted through the center portions thereof.

  As shown in FIG. 6, the coil springs 657 and 658 are both movable hooks 657b and 658b at the right end in the X-axis direction, and the latch blocks 659 and 660 and the adjuster block are the same as in the above embodiment. The cylinder blocks 653 and 654 are hooked through 661 and 662. As the movable parts of the cylinder blocks 653 and 654 move up and down, the lever pins 661a and 662a of the adjuster blocks 661 and 662 move up and down, thereby expanding and reducing the diameter of the coil springs 657 and 658. The state will change.

  Also in this modification, the latching blocks 659 and 660 and the adjuster blocks 661 and 662 are inserted as having an adjusting mechanism for correcting the angle between the coil springs 657 and 658 and the cylinder blocks 653 and 654. The mechanism is the same as described above, and the bolts 659a and 660a and the nuts 667 and 668 are fastened to each other in a state where the angle is corrected.

In this modified example, there is no equivalent to the cover plate 605 of the brake device 60 according to the above-described embodiment, but this is the inner side of the fixed blocks 652, 670 and the cylinder blocks 653, 654 in the modified example. This is because the wall surface has the function.
Also in the brake device according to the modified example having the above-described configuration, the same operations and effects as the brake device according to the above embodiment can be obtained.

[Other matters]
In the embodiment and the modification described above, the adjusting mechanism (the latching blocks 609, 610, 659, 660 and the adjuster) is provided between the movable hooks 607b, 608b, 657b, 658b and the cylinder blocks 603, 604, 653, 654 in the brake device. The mechanism realized by the combination of the blocks 611, 612, 661, 662) is inserted, but an adjusting mechanism is provided between the fixed hooks 607a, 608a, 657a, 658a and the fixed blocks 602, 652, 670. It may be inserted. However, in this case, as compared with the case of the configuration of the above-described embodiment and modification, a larger force is applied in a state where the brake is applied, so the two blocks 609, 610, 659, 660, It is necessary to ensure the tightness between 611, 612, 661, 662.

Moreover, in the said embodiment and modification, although coil spring 607,608,657,658 using the wire which has a square cross-sectional shape was employ | adopted, this invention is not limited to this, and the wire which has various cross-sectional shapes A coil spring having the following structure can be employed.
In the embodiment and the modification described above, the adjustment mechanism is configured by combining the latching blocks 609, 610, 659, and 660 and the adjuster blocks 611, 612, 661, and 662. However, the present invention is not limited to this, and any mechanism may be used as long as a mechanism capable of correcting the angle is interposed between one end of the coil spring and the movable body or the base of the apparatus.

  The present invention is useful for realizing a spring brake device that can be produced with high production efficiency and has high reliability.

1. Rotation drive system 10. Motor 20. Coupler 30,35. Rotating shaft 40, 50. Pillow block 60. Spring brake device 600,601. Side plate 602, 652, 670. Fixed block 603,604,653,654. Cylinder block 605. Cover plate 606, 656, 669. Rotating core 607,608,657,658. Coil springs 609, 610, 659, 660. Hanging block 611,612,661,662. Adjuster block 613,614. Bearing 615,616,665,666. Knock pins 617, 618, 667, 668. nut

Claims (7)

A coil spring is mounted around the rotating body. When the coil spring is in a reduced diameter state, the brake works by contact resistance between the coil spring and the rotating body. Is a spring brake device that is released
One end of the coil spring is fixed to the apparatus base, and the other end is connected to the movable body. The other end receives the force from the movable body, and the diameter of the coil spring can be freely changed.
When the movable body is applying a force to the other end of the coil spring, the coil spring becomes expanded state, wherein the movable body is not applying a force to the other end of the coil spring, or slack the force applied When the coil spring is turned, the coil spring is in a reduced diameter state,
Between one end of the coil spring and the apparatus base, or between the other end of the coil spring and the movable body, for angle correction in the winding direction of the coil spring between each other. The adjustment mechanism is inserted ,
The adjustment mechanism is interposed between the other end of the coil spring and the movable body, and is configured with a combination of two ring-shaped blocks.
One of the two ring-shaped blocks is provided with a groove or hole for hooking the other end of the coil spring,
On the other of the two ring-shaped blocks, a pin for receiving a force from the movable body is extended outward in the radial direction,
2. The spring brake device according to claim 1, wherein the two ring-shaped blocks are fastened together with an angle correction between them. From one of the two ring-shaped blocks, a bolt protrudes toward the other ring-shaped block,
The other of the two ring-shaped blocks has a hole that allows insertion of the bolt,
The two ring-shaped blocks are such that the bolt inserted through the other hole is fastened by a nut,
The spring brake device according to claim 1 , wherein the hole in the other ring-shaped block is a long hole in the winding direction of the coil spring. The coil spring is configured drives out wire having a rectangular cross-section, Oite when braked, according to claim 1 or 2, characterized in that surface contact with the rotary member Spring brake device. 4. The spring brake device according to claim 3 , wherein the coil spring has an aspect ratio of substantially 1 in a cross section of the wire. 5. A second coil spring is attached to the rotating body,
One end of the second coil spring is fixed to the apparatus base, and the other end receives the force from the second movable body and is movable in the winding circumferential direction;
The spring brake device according to any one of claims 1 to 4 , wherein the second coil spring is opposite to the coil spring in a direction in which a brake is applied to the rotating body. The spring brake device according to any one of claims 1 to 5 , wherein a regulating member for regulating an outer diameter in the expanded state is disposed on a winding outer periphery of the coil spring. . The spring brake device according to any one of claims 1 to 6 , wherein the coil spring is in a reduced diameter state in a free state, and an inner diameter thereof is smaller than an outer diameter of the rotating body.

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