TWI600607B - Tension generating device - Google Patents

Description

Tension generating device

The present invention relates to a tension generating device used in a factory or the like for assembling an industrial product.

Previously, there was a spring balancer or a wire reel that converts the spring force of the coil spring into tension.

The spring balancer or the cable reel is used for hanging (hanging and holding) tools, work equipment, and the like at a work site where an industrial product is assembled (see Patent Document 1).

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Laid-Open Patent Publication No. 2006-103860

The tension based on the elastic force of the coil spring can also be used in various applications other than the hanging tool or the work equipment. Especially in the current call for crisis management or power saving for disasters, the requirements for power that does not require electricity are very high.

However, since the conventional spring balancer or the cable reel is configured for the purpose of a hanging tool or a working device, there is a problem that installation other than hanging is not easy and it is difficult to use it for other purposes.

In view of the above problems, an object of the present invention is to provide a tension generating device which can be easily used for various purposes.

In order to solve the above problems, the present invention provides a tension generating device having: a cable that transmits tension; a rotating cylinder that fixes one end of the cable to be wound up; and a rotational force that imparts a rotational force to rotate the rotating cylinder toward the winding side The coil spring is characterized in that the rotating cylinder and the coil spring are housed in a rectangular parallelepiped main body case, and the main body case is provided with a screw hole for attaching the main body case to a desired position when in use.

Preferably, the fixing screw holes are provided on all surfaces except one surface.

Further, it is preferable to provide an adjustment mechanism for adjusting the tension.

Further, it is preferable that a wire retaining member for preventing the wire from coming off is provided along the outer circumferential surface of the rotating cylinder.

Further, it is preferable that the winding diameter of the rotating cylinder is gradually reduced from one end of the wire to the other end.

Further, it is preferable that the tension generating device is used in a synchronous vehicle.

According to the present invention, by directly using the rotating cylinder and the coil spring of the prior spring balancer and using a predetermined casing, it is possible to provide a tension generating device which has a wide range of use and can generate tension without electric power. . The tension generating device of the present invention can be not only suspended It can be used or installed according to the shape of the support body or the installation site, etc., upwards, laterally, and obliquely as needed. Therefore, it can be used for synchronous trolleys, lifting platforms, tilting tables, and horizontal drawing tables. And so on.

1, 20‧‧‧ Tension generating device

2‧‧‧ Ontology

3‧‧‧Steel cable

4‧‧‧ratchet

5‧‧‧ spindle

6‧‧‧ coil spring

7‧‧‧buffer rubber

8‧‧‧Chain

9, 21‧‧‧Extracting components

10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h‧‧‧ screw holes

11, 22‧‧‧ long holes

12‧‧‧Rotating tube

13‧‧‧ body box

14‧‧‧ center axis

15‧‧‧ slot department

16‧‧‧ Nuts

17‧‧‧Steel wire retaining member

30‧‧‧Synchronous trolley

Fig. 1 is a front elevational view showing a tension generating device according to a first embodiment of the present application.

Fig. 2 is a plan view showing a tension generating device according to a first embodiment of the present application.

Fig. 3 is a rear elevational view showing the tension generating device according to the first embodiment of the present application.

Fig. 4 is a left side view showing the tension generating device according to the first embodiment of the present application.

Fig. 5 is a cross-sectional view showing the A-A cut surface of the tension generating device shown in Fig. 1;

Fig. 6 is a left side view showing the tension generating device according to the second embodiment of the present application.

Fig. 7 is a front elevational view showing an example of use of the tension generating device according to the first embodiment of the present application in a synchronous vehicle.

(First embodiment)

A tension generating device according to a first embodiment of the present application will be described with reference to Figs. 1 to 5 .

Fig. 1 is a front elevational view showing the tension generating device 1 according to the first embodiment of the present application. The tension generating device 1 according to the first embodiment is composed of a main body 2 covered by a main body case 13 formed of a thin metal plate and a wire rope 3 drawn from the left side surface of the main body 2. The main body case 13 can be opened by removing the screw disposed on the front surface of the tension generating device 1, and the inside of the main body 2 is provided with a coil spring 6 which will be described later, and the cable 3 is wound by the biasing force of the coil spring 6. The tension is applied to the body 2 in a manner.

A ratchet 4 and a spindle 5 that is engaged with the ratchet 4 are provided near the center of the front surface of the body 2. The user can rotate the spindle 5 by using a hexagonal bar wrench (not shown) to elastically deform the coil spring 6, thereby adjusting the tension of the cable 3. The tension generating device according to the first embodiment is configured to be able to adjust the tension in this manner, and thus is easily used for various purposes.

The cable 3 is provided with a cushion rubber 7 and is constructed to have a fixed length and avoid further winding. Further, a thimble 8 is attached to the front end of the cable 3. Further, in the invention of the present application, the front end of the cable 3 is not limited to the configuration in which the ring 8 is attached, and may be configured to be fixed in a ring shape alone or in a ring or hook.

An opening member 9 for preventing abrasion of the wire 3 is provided at an opening of the supply cable 3 from the body 2. As the material of the extraction member 9, it is preferable that the steel cord 3 is not worn and the wear resistance of the material itself is also high. For example, engineering plastics such as polyacetal resin can be used. The extraction member 9 is detachably screwed and can be replaced when worn due to use.

The former spring balancer or cable reel is used by hanging on the operator's head, so that even if the cable outlet is opened to a large extent, the operator's finger or the hem of the clothes is caught in the cable or the rotating drum. The risk is also small, and the tension generating device of the present invention is designed to be able to be used at the hand or the foot of the operator, thereby reducing the withdrawal of the cable to improve safety.

Fig. 2 is a plan view showing the tension generating device 1 according to the first embodiment. The body 2 has a substantially rectangular parallelepiped shape, and a pair of screw holes 10a and 10b are formed on the upper surface of the body 2. The screw holes 10a, 10b are used to screw the body 2 to a desired position when the tension generating device 1 is used. As a result, the tension generating device of the first embodiment can be easily attached to a desired position, and can be easily used in existing equipment. Further, the tension generating device 1 of the first embodiment is also more likely to generate tension in a desired direction. That is, in the tension generating device 1 shown in FIG. 1, for example, the left side of the pattern can be generated. The tension on the right side, but if the tension generating device 1 is rotated 90 degrees clockwise, the tension from top to bottom can be generated, and if it is rotated by 90 degrees, the tension from the left side to the right side can be generated, and if it is rotated by 90 degrees, It can produce tension from bottom to top. Further, the extraction of the wire 3 is not limited to the direction perpendicular to the surface of the main body case 13 on the side where the discharge port is formed, so that the tension can be easily set in all directions.

Fig. 3 is a rear elevational view showing the tension generating device 1 according to the first embodiment of the present application. On the back surface of the body 2, screw holes 10c, 10d, 10e, and 10f are formed, which are used to screw the body 2 to a desired position when the tension generating device 1 is used.

Fig. 4 is a left side view showing the tension generating device 1 according to the first embodiment of the present application. In order to explain the extraction member 9, the representation of the cable 3 is omitted.

The drawer member 9 is screwed to the body case 13 and is formed with an elongated hole 11 that extends obliquely with respect to the thickness direction of the body 2. The long hole 11 is formed at a position corresponding to a through hole (not shown) formed in the main body case 13, and constitutes an extraction port of the cable 3 that penetrates the inside and the outside of the main body 2. Since the rotating cylinder 12 that winds up the cable 3 has a conical shape as described below, the steel cord 3 extending from the rotating cylinder 12 can be prevented from contacting the extraction member 9 as much as possible by tilting the growth hole 11.

On the left side of the body 2, screw holes 10g, 10h for screwing the body 2 to a desired position are also formed. In the drawings, the right side surface and the bottom surface of the main body 2 are not shown, but two screw holes are formed in the same manner as the left side surface and the upper surface. In other words, the screw holes are formed in five faces other than the front surface, and the tension generating device 1 according to the first embodiment of the present application can easily fix the main body 2 at a desired position. Further, in the invention of the present application, the number or position of the screw holes may be changed depending on the use. For example, it is also possible to provide screw holes only on the upper surface, the lower surface, and both sides, or to change the number of screw holes on each side. the amount.

Fig. 5 is a cross-sectional view showing the A-A cut surface shown in Fig. 1 of the tension generating device 1 according to the first embodiment.

The inner body 2 is provided with a central shaft 14 rotatably supported by the main body case 13; a coil spring 6 having a central side end fixed to the central shaft 14; and a rotating cylinder 12 opposite to the outer side of the coil spring 6. The portions are coupled and rotatably supported on the central shaft 14. The coil spring 6 is a rotational force that causes the rotary cylinder 12 to rotate in the direction in which the cable 3 is wound.

The outer peripheral surface of the rotary cylinder 12 has a conical surface shape, and a groove portion 15 that is recessed toward the inner side in the radial direction is formed in a spiral shape on the outer peripheral surface. The end portion of the groove portion 15 on the side of the larger diameter portion of the groove portion 15 is detachably fixed to the end portion of the wire rope 3, and the wire rope 3 is wound toward the side having a smaller diameter. The reason why the end of the cable 3 is detachably fixed is that the cable 3 can be replaced when the cable 3 is deteriorated due to use.

When the cable 3 is pulled out by the user's operation or the like, the coil spring 6 is elastically deformed to increase the number of windings, and the rotational force of the coil spring 6 to the rotating cylinder 12 is increased, but the peripheral surface of the rotating cylinder 12 has a conical shape. Therefore, the reaction force received from the cable 3 is gradually applied to the larger diameter side of the rotary cylinder 12, and the rotating cylinder 12 is gradually increased in rotational torque. Moreover, when the cable 3 is taken up, it acts in the opposite manner to the above.

As a result, the tension generating device 1 of the first embodiment is applied to the position of the rotating cylinder 12 by changing the reaction force from the wire rope 3, thereby offsetting the change in the rotational force of the coil spring 6 to the rotating drum 12, regardless of the volume. Both yields produce a substantially constant tension. Since the tension is fixed, the tension generating device 1 of the first embodiment can be easily used for various purposes.

Furthermore, the invention of the present application is not limited to being capable of generating a large amount regardless of the amount of winding out. The type of tension that results in fixation. That is, the inclination angle of the outer peripheral surface of the conical surface with respect to the rotation axis may be adopted at all angles depending on the application, or may be increased by changing the rate of change of the winding diameter, for example, as the tension length of the cable 3 becomes longer. The configuration is such that, conversely, the tension is reduced as the length of withdrawal of the cable 3 becomes longer.

Nuts 16a to 16e (not shown in addition to 16c and 16e) are attached to the inner side of the screw holes 10a to 10h formed in the main body case 13.

On the outer side of the outer peripheral surface of the conical surface of the rotating cylinder 12, a plate-shaped wire retaining member 17 extending along the inclined surface is provided. The cable retaining member 17 is a member that prevents the cable 3 from falling out of the rotating cylinder 12. The position in the circumferential direction of the cable retaining member 17 is preferably in the vicinity of the boundary between the portion of the cable 3 that is wound around the rotating cylinder 12 and the portion of the cable 3 that extends linearly from the rotating cylinder 12, in the first embodiment. The radial extension is provided directly above the center of rotation of the rotating cylinder 12. Further, in the first embodiment, the cable retaining member 17 is fixed to the front side portion of the main body case 13 by a cantilever, but the present invention is not limited thereto.

In the conventional spring balancer, the substantially circular main body case has an inner diameter surface facing the outer peripheral surface of the conical surface of the rotary cylinder, so that the inner diameter surface prevents the steel cord from coming off the rotating cylinder. However, in the present invention, since the main body case 13 has a rectangular parallelepiped shape and does not have an inner diameter surface facing the rotary cylinder 12, the wire rope retaining member 17 is provided to prevent the wire rope 3 from falling off.

(Second embodiment)

Next, a tension generating device 20 according to a second embodiment of the present application will be described with reference to Fig. 6 . The tension generating device 20 of the second embodiment is the same as the tension generating device 1 of the above-described first embodiment except for the extracting member 21 for extracting the cable and the rotating cylinder (not shown). The same part of the tension generating device 1 of the first embodiment The extraction member 21 and the rotary cylinder of the tension generating device 20 according to the second embodiment will be described.

Fig. 6 is a left side view showing the tension generating device 20 of the second embodiment. In order to explain the extraction member 21, the representation of the cable is omitted.

Unlike the first embodiment, the outer peripheral surface of the rotary cylinder (not shown) of the tension generating device 20 has a cylindrical surface shape. Therefore, the biasing force of the coil spring increases as the cable is pulled out, and the tension applied to the cable increases.

By making the outer peripheral surface of the rotating cylinder into a cylindrical shape, the wire is pulled out or taken up while moving in the horizontal direction of FIG. 6, so that the long hole 22 of the drawing member 21 is not inclined but is The body box extends in the thickness direction to reduce contact with the cable.

The tension generating device according to the first embodiment or the tension generating device according to the second embodiment can be selected depending on the application. However, when the double tension generating device is manufactured, the main box, the coil spring, the cable, and the like are provided. For common parts, manufacturing can be suppressed by cost. In the tension generating device 1 according to the first embodiment and the tension generating device 20 according to the second embodiment, the main body case is preferably formed in the through hole of the main body case because the shape of the drawing opening of the cable is different. The shape also differs depending on the shape of the suction port. For example, an inclined through hole may be provided on the left side surface of the main body case 13 as shown in FIG. 1, and the thickness of the body 2 may be provided in the lower portion of the right side surface. The through holes extending in the direction are used to make the main body case 13 a common component. Alternatively, a large through hole that can be used in any of the embodiments can be provided only by the left upper surface portion of the main body case 13 shown in FIG. 1, and the extraction member corresponding to the embodiment can be used. The main body case 13 is set as a common component.

Finally, referring to Fig. 7, the tension generating device 1 of the first embodiment is used. The use case is explained. Further, in the present application example, the tension generating device 20 of the second embodiment described above can be used in the same manner as the tension generating device 1 of the first embodiment.

In the assembly line of a conveyor for manufacturing an industrial product such as an automobile, the tension generating device according to the first embodiment of the present application is used in a synchronous cart 30 in which a component or the like is mounted and moved simultaneously with a conveyor in a fixed section. An example of 1.

The tension generating device 1 is attached to the lower portion of the synchronous cart 30, and the ring 8 provided at the front end of the cable 3 is hooked to the fixing portion. With this configuration, when the synchronous cart 30 is pulled by the engaging portion (not shown) of the conveyor and moved at the same time as the conveyor, the cable 3 of the tension generating device 1 is extracted, and if the interval is When the user releases the engagement with the conveyor at the end of the work or the like, the tension generating device 1 winds up the cable 3 and returns the synchronous carriage 30 to the original position.

Since the tension generating device 1 has a rectangular parallelepiped shape and has screw holes on each surface other than the front surface, it can be easily attached to a conventional synchronous vehicle. Moreover, by using the biasing force of the coil spring 6, the synchronous trolley can be made active without power.

Furthermore, the use of the tension generating device of the present invention is not limited to the synchronous trolley, and may be used in the following applications by changing the configuration of the coil spring or the cable or the like: changing the size of the capacity to move or hold the belongings, Alternatively, temporarily store the kinetic energy in the coil spring. Moreover, the length of the stroke can also be changed by changing the configuration of the rotating cylinder and the cable.

As described above, according to the present invention, it is possible to provide a tension generating device which can be easily used for various purposes and which can generate tension without requiring electric power.

1‧‧‧Tension generating device

2‧‧‧ Ontology

3‧‧‧Steel cable

7‧‧‧buffer rubber

8‧‧‧Chain

9‧‧‧Extracting components

10c~10f‧‧‧ screw hole

13‧‧‧ body box

Claims (7)

A tension generating device comprising: a cable that transmits tension; a rotating cylinder that fixes one end of the cable to be wound up; and a coil spring that imparts a rotational force that rotates the rotating cylinder toward the winding side; The rotating cylinder and the coil spring are housed in a rectangular body box; and a plurality of surfaces of the main body box are formed through the inner and outer portions of the main body box to form a screw hole for mounting the main body box at a desired position when in use; The outer circumferential surface of the rotating cylinder extends from one side of the rotation center axis of the rotating cylinder to the other side, and the steel cable retaining member for preventing the cable from falling off is fixedly disposed inside the main body box; formed in the main body box a predetermined position, an outlet member having an elongated hole corresponding to a through hole penetrating through the inner and outer portions of the body case is mounted to the body case; the elongated hole of the outlet member extends in a direction corresponding to an outer diameter shape of the rotating barrel; The cable is withdrawn through the elongated hole of the extraction member. The tension generating device of claim 1, wherein the fixing screw hole is provided on all but one surface. A tension generating device according to claim 1, which is provided with an adjusting mechanism for adjusting the tension. A tension generating device according to claim 2, which is provided with an adjusting mechanism for adjusting the tension. A tension generating device according to any one of claims 1 to 4, wherein the rotation The winding path of the cylinder is gradually reduced from one end of the cable to the other end. A tension generating device according to any one of claims 1 to 4, which is used in a synchronous trolley. The tension generating device of claim 5, which is used in a synchronous trolley.