JP5047197B2 - Cable protection guide device - Google Patents

Description

  The present invention is used for machine tools, electronic devices, civil engineering machines, industrial robots, transfer devices, etc., and electric cables, optical fiber cables, fluid supply for supplying power, signal transmission, liquid supply, air supply, etc. to these moving parts The present invention relates to a cable protection guide device for safely and reliably protecting and guiding flexible cables such as hoses for hoses and the like (hereinafter simply referred to as “cables”).

Conventionally, a plurality of link plates having a rotation restricting protrusion at one end and a rotation restricting protrusion fitting portion at the other end are arranged apart from each other in the left and right direction and connected in a flexible manner in the cable longitudinal direction. Cable that accommodates and guides cables between the link plates, and the bending angle is regulated by the rotation restriction protrusions and the rotation restriction protrusion fitting portions of the connected front and rear link plates coming into contact with each other by turning. Kind protection guide devices are well known.
A cable protection guide device provided with a buffer member for absorbing impact when the rotation restricting protrusion and the rotation restricting protrusion fitting portion come into contact with each other by turning and suppressing the contact sound is known.

  As shown in FIGS. 5 and 6, the known cable protection guide device 500 includes a rotation restricting projection 510 at one end of the link plate 501 and a rotation restricting projection fitting at the other end. Are provided, and the rotation restriction protrusion 510 and the rotation restriction protrusion fitting portion 520 of the front and rear link plates 501 are arranged and connected at positions where they come into contact with each other by a rotation of a certain angle or more, so that the bending angle is restricted. Has been.

  The rotation restricting projection fitting part 520 is provided with a recess 521 on the surface where the rotation restricting protrusion 510 abuts, and a buffer member 530 is provided projecting from the recess 521, and the rotation restricting protrusion fitting part 520 is rotated with the rotation restricting protrusion fitting part 520. When the buffer member 530 comes into contact and elastically deforms before the contact with the movement restricting protrusion 510, the impact is absorbed and the contact sound is suppressed (see, for example, Patent Document 1).

JP-A-9-119485 (page 4, FIG. 3)

  However, such a known cable protection guide device 500 needs to be attached to the abutting surface so as not to drop the buffer member 530, which is a separate member, and the man-hours for assembly and maintenance of the cable protection guide device 500 increase. There was a problem to do.

  The present invention solves the problems of the prior art as described above, that is, the object of the present invention is to provide a bending angle with only a slight elasticity of the link plate itself without using a separate buffer member. It is intended to provide a cable protection guide device that absorbs an impact by distributing the timing of contact that occurs when regulating the cable and reduces the man-hours for assembly and maintenance.

  According to the first aspect of the present invention, a link plate having a rotation restricting protrusion at one end and a rotation restricting protrusion fitting portion at the other end is spaced apart from the left and right and can be bent in the longitudinal direction of the cable. Are connected to each other, accommodates cables between the left and right link plates, protects and guides them, and the rotation restriction protrusions and the rotation restriction protrusion fitting portions of the connected front and rear link plates collide by rotation. In the cable protection guide device in which the bending angle is regulated by the above, the contact portion provided on each of the rotation restricting protrusion and the turn restricting protrusion fitting portion is formed in a wedge shape with a surface contact portion that makes the surfaces contact each other. The surface contact portion formed on each of the rotation restricting projection and the turn restricting projection fitting portion is slightly angled with respect to the turning radial direction. By being formed differently It is intended to solve the above problems.

  In addition to the configuration of the cable protection and guide device described in claim 1, the invention according to claim 2 is a wedge contact portion formed on each of the rotation restricting protrusion and the turn restricting protrusion fitting portion. However, the tip angle on the insertion side is formed larger than the tip angle on the insertion side, thereby further solving the problem.

  According to the first aspect of the present invention, a link plate having a rotation restricting protrusion at one end and a rotation restricting protrusion fitting portion at the other end is spaced apart from the left and right and can be bent in the longitudinal direction of the cable. Are connected to each other, accommodates cables between the left and right link plates, protects and guides them, and the rotation restriction protrusions and the rotation restriction protrusion fitting portions of the connected front and rear link plates collide by rotation. In the cable protection guide device in which the bending angle is restricted by the contact portion provided on each of the rotation restricting projection and the turn restricting projection fitting portion, the surface contact portion that makes contact with the flat surface and the wedge shape. Since the contact timing is distributed between the surface contact portion and the wedge contact portion, the contact portion of the wedge contact portion has an angle with the radial direction. Since the force is distributed in the sliding direction, Without using the member, it is possible to absorb the impact of the abutment that occurs when regulating the bending angle only a slight elasticity of the link plate itself, it is possible to reduce the man-hours of assembly and maintenance.

  The surface contact portions formed on the rotation restricting protrusion and the rotation restricting protrusion fitting portion are formed so as to have a slightly different angle with respect to the rotational radius direction, thereby achieving surface contact. Since the parts come into contact with each other in order from the end, the contact timing is dispersed at the surface contact part, and the impact of the contact can be absorbed, and the man-hours for assembly and maintenance can be reduced.

  The cable protection guide device according to the second aspect of the present invention is configured in each of the rotation restriction protrusion and the rotation restriction protrusion fitting portion in addition to the effect exhibited by the cable protection guide device according to the first aspect. Since the wedge contact portion formed is formed such that the distal end angle on the insertion side is larger than the distal end angle on the inserted side, the wedge contact portion of the rotation restricting projection and the rotation restricting projection fitting portion is the end portion. Since the impact is made in order, the timing of the impact is further dispersed at the wedge impact portion, and the force is dispersed in the direction in which the insertion side is compressed and the inserted side is widened. This can reduce the assembly and maintenance man-hours.

  In the present invention, a plurality of link plates having a rotation restricting protrusion at one end and a rotation restricting protrusion fitting portion at the other end are arranged to be separated from each other in the left and right directions, and are connected in a flexible manner in the cable longitudinal direction. Cables are housed between the left and right link plates for protection and guidance, and the bending angle is regulated by the pivoting protrusions and the pivoting protrusion fittings of the connected front and rear link plates coming into contact with each other. In the cable protection guide apparatus, the contact portion provided on each of the rotation restricting projection and the turn restricting projection fitting portion is engaged with a surface contact portion that makes the surfaces contact each other and a wedge contact portion that engages in a wedge shape. The surface contact portion formed on each of the rotation restricting protrusion and the turn restricting protrusion fitting portion is formed so that the angle is slightly different from the turning radial direction, The timing of impact and the direction of force are distributed Without using a separate cushioning member, if the impact is absorbed and the impact is absorbed and the man-hours for assembly and maintenance are reduced by regulating the bending angle, the specific implementation Any aspect may be used.

The material of the link plate of the cable protection guide device of the present invention may be any material such as engineering plastic and steel.
The cable protection and guide device of the present invention may be one in which the link plate is assembled by any member or means. For example, the link plate on the left and right are formed integrally with the connecting plate, and the link plate on the left and right are separated. It may be assembled and fixed by a connecting plate of the body, or provided so that the connecting plate can be opened and closed with respect to the link plate.

Below, the cable protection guide apparatus of this invention is demonstrated based on drawing.
1 is a partially exploded perspective view of a cable protection guide device of the present invention, FIG. 2 is a cross-sectional view of the link plates of FIG. 1 in a straight line state, and FIG. 3 is a view of the link plates of FIG. FIG. 4 is a sectional view in a bent state, and FIG. 4 is an enlarged explanatory view of the abutting portion of FIG.

  As shown in FIG. 1, a cable protection guide device 100 according to an embodiment of the present invention is used to protect and guide cables C, and a rectangular link frame 150 is elongated. A cable housing space in which a large number of them are connected and can be in a straight line state or a bent state depending on the movement state between a movable part and a stationary part (not shown), and these link frame bodies 150 are continuously formed. Protection guidance can be performed with the cables C inserted therein.

The link frame 150 includes a pair of left and right link plates 101 and 101 that are spaced apart from each other, a bent inner peripheral side connecting plate 102 that is horizontally mounted on the bent inner peripheral side of the link plates 101 and 101, and a laterally bent outer peripheral side. The bent outer peripheral side connecting plate 103 is integrated in a rectangular shape.
The bent inner peripheral side connecting plate 102 is integrated with a pair of left and right link plates 101, 101 by injection molding or the like, and one end of the bent outer peripheral side connecting plate 103 is rotatable to one link plate 101. And the other end can be opened and closed so as to be engageable with the other link plate 101.

The plate front and rear of the link plate 101 have an offset structure in which a step is formed in the plate thickness direction. A connection pin 104 is provided on the rear of the link plate 101 and a connection pin 104 is provided on the front of the plate. And a connecting pin hole 105 having substantially the same diameter.
The link frame bodies 150 are connected by fitting the connecting pins 104 and the connecting pin holes 105 of the link plates 101 and 101 arranged continuously to each other, and bent around the connecting pins 104. It has become.

A rotation restricting projection 110 is provided around the connecting pin 104, and a rotation restricting projection fitting portion 120 is provided around the connecting pin hole 105. When the adjacent link plates 101 are connected, the turn restricting protrusion 110 is rotated. The movement restricting protrusion 110 is located in the space of the rotation restricting protrusion fitting portion 120.
As shown in FIGS. 2 and 3, the contact portions 111 and 121 of the rotation restricting protrusion 110 and the turn restricting protrusion fitting portion 120 are provided on both sides in the respective rotating directions and are adjacent to each other. When the link plates 101 are in a straight line state and when the adjacent link plates 101 are in a most bent state, the bending angle is regulated in both directions of rotation.

  As shown in FIG. 4, the contact portions 111 and 121 of the rotation restricting protrusion 110 and the turn restricting protrusion fitting portion 120 are surface contact portions 112 and 122 provided on the side close to the center of rotation. The wedge contact portions 113 and 123 provided continuously therewith, the wedge contact portion 113 of the rotation restricting projection 110 being convex, and the wedge contact portion 123 of the rotation restricting protrusion fitting portion 120 being concave. Is formed.

The surface contact portion 112 of the rotation restricting protrusion 110 is set in parallel to the radial direction extending from the rotation center, and the surface contact portion 122 of the rotation restricting protrusion fitting portion 120 is from the rotation center. It is set to be inclined by a minute angle α with respect to the extending radial direction.
Further, if the angle of the apex of the wedge contact portion 113 of the rotation restricting projection 110 is B and the angle of the apex of the wedge contact portion 123 of the rotation restricting projection fitting portion 120 is A, A <B is set. Yes.

When the contact portions 111 and 121 of the rotation restricting protrusion 110 and the turn restricting protrusion fitting portion 120 configured as described above come into contact with each other, first, the center of rotation of the surface contact portions 112 and 122 is set. The closest part comes into contact and rotates until the entire surface contact parts 112 and 122 abut while absorbing the impact of the impact by elastic deformation of the rotation restricting protrusion 110 and the turn restricting protrusion fitting part 120.
Further, the portions far from the apexes of the wedge contact portions 113 and 123 come into contact with each other, and the wedge contact portion 113 is absorbed while absorbing the impact by the elastic deformation of the rotation restricting protrusion 110 and the turn restricting protrusion fitting portion 120. , 123 until the entire contact is made.

As described above, the contact portions 111 and 121 are sequentially formed by using the slight elasticity of the rotation restricting protrusion 110 and the turn restricting protrusion fitting portion 120 of the link plate 101 without using a separate buffer member. By making contact with each other, it is possible to absorb the impact of the collision because of the restriction of the bending angle.
Further, when the wedge contact portions 113 and 123 come into contact with each other, the contact surfaces of the wedge contact portions 113 and 123 have a large angle with respect to the direction in which the force is applied. Since the force is dispersed, the impact can be absorbed more effectively even with a slight elasticity.

  In addition, the wedge contact portions 113 and 123 are subjected to a force in the direction in which the insertion side is compressed and the insertion side is expanded, and as each apex approaches, the reaction force against the force gradually increases. The relative rotation of the movement restricting protrusion 110 and the rotation restricting protrusion fitting portion 120 is smoothly stopped, and the impact of the impact is smoothly absorbed.

  As described above, according to the cable protection and guide device of the present invention, the timing of contact and the direction of force are distributed, and the impact of the contact is absorbed because the bending angle is regulated without using a separate buffer member. The effects are enormous, such as reducing the man-hours for assembly and maintenance.

In addition, in the said Example, although the rotation control protrusion fitting part is formed in the concave shape, you may form in a through-hole shape.
Further, in the above embodiment, the rotation restricting projection protrudes inward of the pair of left and right link plates, and the rotation restricting projection fitting portion is opened outward, but the rotation restricting protrusion is outward. It may be formed so that the rotation restricting protrusion fitting portion is opened outward.

Moreover, in the said Example, although the rotation control protrusion and the rotation control protrusion fitting part are provided in one place of a rotation direction, you may provide in several places of a rotation direction.
In the above-described embodiment, the surface contact portion is provided on the radial rotation center side of the wedge contact portion. However, these may be reversed, and the surface contact portion and the wedge contact portion are two. You may arrange in combination of more than one place.

  Furthermore, in the above embodiment, the wedge contact portion of the rotation restricting protrusion is convex and the wedge contact portion of the rotation restricting protrusion fitting portion is formed in a concave shape, but these may be reversed, One contact portion may have two or more wedge contact portions, and the unevenness thereof may be combined in any manner.

The partial exploded perspective view of the cables protection guide device of the present invention. Sectional drawing of the linear state of link plates of FIG. Sectional drawing of the bending state of the link plates of FIG. FIG. 3 is an enlarged explanatory view of an abutting portion in FIG. 2. The partial cross-section side top view of the conventional cables protection guide apparatus. The enlarged view of the rotation control protrusion and buffer member of the conventional cables protection guide apparatus.

DESCRIPTION OF SYMBOLS 100,500 ... Cables protection guide apparatus 101,501 ... Link plate 102 ... Bending inner periphery side connection plate 103 ... Bending outer periphery side connection plate 104 ... Connection pin 105 ... Connection pin Holes 110, 510 ... rotation restricting projection 111 ... contact portion 112 ... surface contact portion 113 ... wedge contact portion 120, 520 ... rotation restricting projection fitting portion 521 · Recessed portion 121 · · · Contact portion 122 · · · Surface contact portion 123 · · · Wedge contact portion 530 · · · Buffer member 150 · · · Link frame C · · · Cables

Claims (2)

Link plates having a rotation restricting projection on one end and a rotation restricting projection fitting portion on the other end are spaced apart from each other in the left and right direction and are connected in a flexible manner in the cable longitudinal direction. Cables that accommodate and guide cables between them, and whose bending angle is regulated by the rotation restriction projections and the rotation restriction projection fitting portions of the connected front and rear link plates coming into contact with each other by rotation. In the protection guide device,
The contact portions provided in each of the rotation restricting protrusion and the turn restricting protrusion fitting portion are composed of a surface contact portion that makes contact with flat surfaces and a wedge contact portion that engages in a wedge shape. ,
Cables characterized in that surface contact portions formed on each of the rotation restricting protrusion and the rotation restricting protrusion fitting portion are formed so as to have a slightly different angle with respect to the turning radius direction. Protection guide device.   The wedge contact portion formed in each of the rotation restricting protrusion and the turn restricting protrusion fitting portion is formed such that the distal end angle on the insertion side is larger than the distal end angle on the inserted side. Item 4. A cable protection guide device according to item 1.

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