JPH0743008B2 - Partition structure inside the cable drag chain - Google Patents

Description

Description: TECHNICAL FIELD The present invention partitions the inside of a cable drag chain that supports and guides a hose, a cable, and the like (hereinafter, simply referred to as “cable or the like”) that supplies power to a moving body. For the structure.

Conventional technology and its problems The conventional drag chain has a structure in which a plurality of tubular link bodies are flexibly connected, as disclosed in, for example, Japanese Patent Laid-Open No. 56-159914, and one end thereof is Is connected to a moving machine and has a function of protecting a cable or the like so that the cable or the like having the other end fixed is housed in a sealed state and the cable or the like is not damaged. Therefore, the drag chain can be bent and moved along with the cable or the like when the machine moves.

However, in such a drag chain, due to a repeated bending motion during long-term use, the cables or the like shift to one side in the drag chain, the cables or the like come into contact with each other, and the cables or the like are twisted and entangled. Sometimes.
For this reason, there is a problem that it takes time to replace the cables and the like.

Further, it is convenient if the cables can be grouped inside the cable drag chain for different purposes and thicknesses, but there has been no such mechanism in the past.

Means for Solving Problems A cable drag chain having a plurality of cylindrical link bodies formed by connecting the upper side and the lower side of a pair of spaced-apart link plates with an upper side connecting rod and a lower side connecting rod, respectively. Engagement portions formed in the longitudinal direction of the respective opposing surfaces of the upper side coupling rod and the lower side coupling rod, a plurality of protrusions arranged in the longitudinal direction of the one opposing surface, and the engaged portions. The above problem is solved by a configuration including a partition plate having engaging portions that engage with each other at both ends thereof, and a locking piece that is provided on the partition plate and engages between the plurality of protrusions.

The partition plate is provided between the upper and lower side connecting rods by the engagement between the engaging portion and the engaged portion. The inside of the drag chain is partitioned by a partition plate, and cables and the like are appropriately dispersed and stored in the drag chain.

Therefore, the contact between the cables and the like is reduced, and the cables and the like are not twisted or entangled.

Further, the partition plate can be fixedly mounted by selecting the mounting position.

That is, after the upper side connecting rod or the lower side connecting rod is once removed from the link plate and the drag chain is opened, the locking piece is engaged between the selected protrusions, and the upper side connecting rod or the lower side connecting rod is returned to the original position of the link plate. By closing the built-in drag chain, the engaging portion and the engaged portion are engaged with each other, and the partition plate is provided between the upper and lower side connecting rods at the selected position.

Therefore, the inside of the drag chain is partitioned according to the number of cables and the like. Further, since the locking pieces are engaged between the protrusions, the partition plate will not be displaced even when the drag chain repeatedly bends.

Embodiments FIGS. 1 to 10 show an embodiment of the present invention, FIG. 1 is a front view showing a bent state of an inner surface of a link plate of a cable drag chain, and FIG. 2 is an enlarged perspective view of a main part of the drag chain. FIG. 3 is an exploded perspective view of the link body,
(A) is an upper side connecting rod, (b) and (c) are a pair of link plates spaced apart and facing each other, (d) is a partition plate erected upright between the upper side connecting rod and the lower side connecting rod, and (e) is FIG. 4 (a) is a lower side connecting rod, FIG. 4 (a) is an inner side view of a link plate having a pivotal support portion of the upper side connecting rod, and FIG.
FIG. 5 is a plan sectional view in which end portions of adjacent link plates are superposed and connected, and FIG. 6 is a view of a removable and rotatable mounting portion between one end of the upper side connecting rod and the upper side of one link plate. It is a perspective view of a part, (a) is one end of the upper side connecting rod,
(B) is an upper side of the link plate, and FIG. 7 is a perspective view of an essential part of a removably attachable mounting portion between the other end of the upper side connecting rod and the upper side of the other link plate, and (a) is an upper side connecting rod. The other end, (b) is the upper side of the other link plate, and
Figures (a) and (b) are sectional views of the partition plate in the mounted state, Fig. 8 (c) is a sectional view of the mounted partition plate in an inverted state, and Fig. 9 shows that the upper side connecting rod can be disassembled into two members. FIG. 10A is a perspective view of the top cover member, FIG. 10B is a perspective view of the upper side connecting member, and FIG. 10 is another example in which the lower side connecting rod can be disassembled into two members. Here, (a) is a perspective view of the lower side joining member, and (b) is a perspective view of the lower surface cover member.

The cable drag chain 1 for accommodating and supporting the cables and the like shown in FIG. 1 superimposes and connects the ends of a large number of link bodies 2 with each other and connects them sequentially with a connecting pin 3, and each link body 2 is a cable. Fixed end F and moving end M of drag chain 1
, And is mutually bendable in one direction, for example, downward as shown, but is not bendable in the other direction, for example, upward, and is connected to each other.

As shown in FIG. 2, each link body 2 includes a pair of spaced-apart link plates 4a, 4b, an upper side connecting rod 6 for connecting the upper sides of both link plates 4a, 4b to each other in a removable manner, and both links. A lower side connecting rod (7) for connecting the lower sides of the plates (4a, 4b) to each other so that they can be fitted to each other; There is.

The upper side connecting rod 6 is rotatably fitted around the upper side of one of the link plates 4a, and snaps into the inner connecting recessed portions 9 formed on the facing inner side surfaces of the one ends of all the link plates. An outer coupling recess 10 formed with a mating coupling pin 3 projecting from the opposite outer surface of the other end of the link plate.
A snap-fastening pin hole 3'for inserting and removing the connecting pin 3 is provided therethrough, and the inner connecting concave portion 9 and the outer connecting concave portion 10 of adjacent link plates are superposed and connected as shown in FIG. By fitting the connecting pin 3 into the pin hole 3'and snap-engaging, the respective link bodies 2 are connected to form the cable drag chain 1 as shown in FIG.

As shown in FIG. 3, each link body 2 has a cover portion 6c.
Is assembled by the upper side connecting rod 6 having a pair, the pair of link plates 4a and 4b facing each other at a distance, the partition plate 8, and the lower side connecting rod 7 having the cover portion 7b, and inner surfaces of one end of the pair of link plates 4a, 4b. As shown in FIG. 4, a connecting pin 3 is provided in a protruding manner in the inner connecting recess 9 formed in
At the symmetrical positions on both sides of the first bending regulation surface 11, 11 'for regulating the angle of downward bending of the chain 1 in one direction, for example, the chain 1 in FIG.
In the figure, the first inversion prevention surfaces 12 and 12 'for preventing the chain 1 from bending upward and the stopper receiving concave portion 13 having parallel opposing surfaces are provided, and the first bending restriction surfaces 11 and 11 are provided. Second bending restriction surface 14 that cooperates with ′ to restrict the downward bending angle of the chain, and the first inversion prevention surfaces 12, 1
A fan-shaped recess 16 is provided which has a second reversal blocking surface 15 which cooperates with 2'to prevent upward bending of the chain.

On the other hand, in the other end outer connecting recess 10 of the pair of link plates 4a, 4b, a snap lock pin hole 3'for inserting the snap engaging connecting pin 3 and a stopper receiving recess 13 are rotatably loosely fitted. And a fan-shaped stopper 17 protruding in the diameter and a fan-shaped stopper 18 rotatably loosely fitted in the fan-shaped notch recess 16 are formed, and the boat-shaped stopper 17 includes the first bending restriction surface 11, The first bending stopper surface 19, 19 'which is in rotational contact with 11'
And first reversal stopper surfaces 20 and 20 'that are in rotary contact with the first reversal prevention surfaces 12 and 12' are formed in a straight line that converges in the tip direction, and the fan-shaped stopper 18 has , A second bending stopper surface that comes into rotational contact with the second bending restriction surface 14
21 and a second reversal stopper surface 22 which is in rotational contact with the second reversal prevention surface 15 are formed.

Therefore, when the inner connecting recess 9 at one end and the outer connecting recess 10 at the other end of the link plates adjacent to each other in the longitudinal direction are overlapped and connected to each other as shown in FIG. The adjacent link plates are rotatably connected to each other by being fitted and snap-engaged with the first ′ ′ first bending limiting surfaces 11, 11 ′ and the first bending stopper surfaces 19, 11.
The cable drag chain 1 has a maximum downward bending angle as shown in FIG. 1 due to the pivotal contact with 19 'and the pivotal contact between the second bending restriction surface 14 and the second bending stopper surface 21. It is regulated, and the pivotal contact between the first reversal blocking surfaces 12 and 12 'and the first reversal stopper surfaces 20 and 20' and the second reversal blocking surface 15
The cable drag chain 1 cannot be inverted from the direction shown in FIG. 1 and bent upward due to the rotational contact between the second reverse stopper surface 22 and the second reverse stopper surface 22, and therefore the chain is straightened. The middle part does not hang downward.

By making the radius of the other end circular arc surface 10 'smaller than the radius of the one end circular arc surface 9'of the link plates 4a, 4b, it is possible to increase the downward bendable angle between the adjacent link plates. As a result, the radius of curvature of the chain 1 can be reduced, and the arc surface 10 '
By making the radius smaller, the bending rotation guide surface of the arcuate surface 9'of the adjacent link plates can be lengthened, so that the bending guide between the link plates can be smoothly and reliably performed.

Further, an upper side pivotal support portion into which one end of the upper side connecting rod 6 is removably and rotatably fitted and inserted into the upper side of one of the link plates 4a.
23 and a lower side fitting portion 24 having a cover portion 24 'for removably fitting one end of the lower side connecting rod 7 and the other end of the upper side connecting rod 6 to the upper side of the other link plate 4b. The lower side fitting portion 26 is provided with a snap locking portion 25 that enables it and a cover portion 26 'that allows the other end of the lower side connecting rod 7 to be fitted and removed.

Then, as shown in FIG. 6 (a), a pair of rotating shaft portions 27, 27 fitted to the upper side pivotally supporting portion 23 and a rotation guide concave surface 28 are provided at the one end extending portions 6a, 6b of the upper side connecting rod 6. And a snap locking projection 29 projecting on the concave surface is provided, and the upper side pivotal support portion 23 of one of the link plates 4a has the rotation shaft of the upper coupling rod 6 as shown in FIG. 6 (b). Bearing surfaces 30, 30 for rotationally supporting the portions 27, 27, and rotational guide convex surface 31 of the rotational guide concave surface 28.
And the snap locking recess 32 of the snap projection 29, and therefore, one end of the upper side connecting rod 6 has a rotating shaft portion 27, 27.
The fitting between the bearing surface 30 and the bearing surface 30 prevents the movement in the front-rear, left-right direction and downward, and the snap projection 29 and the snap locking recess
Snap engagement and rotation guide concave surface 28 of 32 and rotation guide convex surface 31
Since the upper side connecting rod 6 and the upper side of the link plate 4a are immovably connected to each other and are not loosened, the upper side connecting rod 6 is prevented from floating by being slidably engaged with the lower surface of the link plate 4a.

However, by opening the other end of the upper side connecting rod 6 upward,
The engagement between the snap projection 29 and the snap locking recess 32 is disengaged, the rotation guide concave surface 28 is slidably guided by the rotation guide convex surface 31, and the rotation shaft portions 27, 27 are supported by the bearing surfaces 30, 30. It becomes rotatable,
The one end extending portions 6a, 6a of the upper side connecting rod 6 abut against the inner side 33, 33 of the upper side of the link plate 4a, whereby the open standing rotation position of the upper side connecting rod 6 is regulated, and at the same time, the upper side connecting rod 6a It is possible to insert and remove one end of the rod 6.

Further, in the fall position of the upper side connecting rod 6, the upper side connecting rod 6
The cover portions 34, 34 ', which are connected to the edges 6b, 6b, extend inward from the upper side of the link plate 4a and maintain the upper surface hermeticity of the link body 2.

On the other hand, at the other end of the upper side connecting rod 6, as shown in FIG. 7 (a), a fitting concave portion 35 for inserting and removing the snap engaging portion 25 projecting inside the upper side of the link plate 4b is formed. A snap hole 37 having a snap claw locking piece 36 is provided in the 35.

As shown in FIG. 7B, the snap locking portion 25 has a snap hole fitting projection 39 having a snap claw 38 for locking the snap claw locking piece 36 and the other end of the upper side connecting rod 6 falling. And a support piece 40 for blocking the above.

Therefore, when the other end of the upper side connecting rod 6 is pressed against the snap locking part 25 of the link plate 4b, the snap hole 37 is pushed open and the snap claw locking piece 36 is locked to the snap claw 38, and the snap locking part. 25 is fitted in the fitting concave portion 35, the snap hole fitting convex portion 39 is fitted in the snap hole 37, and the other end of the upper side connecting rod 6 and the upper side of the link plate 4b are detachably coupled.

Both ends 7a, 7a of the lower side connecting rod 7 form a T shape as shown in FIG. 3 (e), and snap claws 41, 41 are provided on both sides.
And the lower side fitting portions 24 and 26 projecting inside the lower sides of the link plates 4a and 4b are engaged with the snap claws 41 and 41 as shown in FIG. 4 (a). T-shaped fitting recesses 43, 43 having locking protrusions 42, 42 are provided as recesses.

Therefore, both ends 7a, 7a of the lower side connecting rod 7 are connected to the link plate 4
When it is pushed into the fitting recesses 43, 43 on the lower side of a, 4b, the snap claws 4
1, 41 and the engaging projections 42, 42 are snap-engaged, and the lower side connecting rod 7 connects the lower sides of the link plates 4a, 4b to each other so that they can be fitted into and removed from each other.

Further, as shown in FIGS. 3 (e), 8 (a) and 8 (b), an upper slide guide dovetail groove having a large number of conical tip projections 44 is provided on the inner upper surface of the lower side connecting rod 7. Has a groove 45,
On the inner lower surface of the upper side connecting rod 6, the sliding guide dovetail groove 45
Downward slide guide grooves 46 are provided directly above each other so as to face each other, and a pair of lower slide snap engagement leg pieces 4 formed at the lower end of the partition plate 8 are formed in the opposed slide guide grooves 45 and 46, respectively.
7, 47 and a pair of upper slide snap engagement leg pieces 48, 48 formed at the upper end of the partition plate 8 are slidably loosely fitted, and a lower end is provided between the pair of lower slide snap engagement leg pieces 47, 47. A short hanging locking piece 70 having a taper guide surface is vertically provided, and the tip 70a of the locking piece 70 [Fig. 8 (b)] has an acute angle. Can be inserted and removed. Further, a number is attached to the tip 70a of the locking piece 70 in the arrangement order of the locking pieces 70 (not shown).

Therefore, when the partition plate 8 is pushed down at a desired position, the hanging locking piece 70 is clamped between the locking projections 44 and the position is fixed, so that the floating movement of the cable or the like housed in the cable drag chain 1 can be prevented. It can be prevented by the partition plate 8 to prevent surface abrasion damage of cables and the like.

When the partition plate 8 is inverted as shown in FIG. 8 (c), since there is no hanging locking piece between the upper sliding snap engagement leg pieces 48, 48, it does not engage with the locking projection 44. The partition plate 8 can freely slide in the upper and lower concave grooves 45, 46.

FIG. 9 shows another embodiment of the upper side connecting rod 6, which is separably fitted to the upper surface cover member 6'as shown in (a) and the upper side connecting member 6 "as shown in (b). To configure the first
FIG. 10 shows that the lower side connecting rod 7 is detachably fitted to the lower side connecting member 7 ″ as shown in (a) and the lower surface cover member 7 ′ as shown in FIG. By removing the top cover member 6'and the bottom cover member 7 ', the cable drag chain can be changed from the closed type to the open type.

EFFECTS OF THE INVENTION According to the present invention, since the partition plate that engages with the engaged portion is provided between the upper and lower side connecting rods, when the cable drag chain is moved, the cable or the like shifts to one side and twists. As a result, entanglement does not occur, and cable replacement work can be easily performed.

Further, since the partition plate can be fixed and adjusted in its position as appropriate, the inside of the cable drag chain can be partitioned according to the number of cables and the like and the application.

Further, with the configuration of claim 2, the snap-type partition structure can be easily realized.

[Brief description of drawings]

1 to 10 show an embodiment of the present invention, FIG. 1 is a front view showing a bent state of an inner side surface of a link plate of a cable drag chain, and FIG. 2 is an enlarged perspective view of an essential part of the cable drag chain, 3 is an exploded perspective view of the link body,
(A) is an upper side connecting rod, (b) and (c) are a pair of link plates which are separated and opposed to each other, (d) is a partition plate, (e) is a lower side connecting rod, and FIG. 4 (a) is FIG. 3 ( 3B is a front view of the link plate, FIG. 3B is a rear view of the link plate superposed and connected to the link plate of FIG. 3B, and FIG. FIG. 6 is a perspective view showing a fitting / removing structure between the upper side of one of the link plates and one end of the upper side connecting rod. FIG. 6 (a) is a perspective view of a main part of one end of the upper side connecting rod, and FIG. FIG. 7 is a perspective view of a main part of the upper side of the link plate, and FIG. 7 is a perspective view showing a fitting / removing structure of the upper side of the other link plate and the other end of the upper side connecting rod.
(A) is a perspective view of a main part of the other end of the upper side connecting rod, (b) is a perspective view of a main part of the upper side of the other link plate, FIG. 8 (a),
FIG. 8B is a sectional view of the partition plate in an attached state, FIG. 8C is a sectional view of the inverted partition plate in an attached state, and FIG. 9 is an exploded view of another embodiment of the upper side connecting rod. a) is a perspective view of a cover member, (b) is a perspective view of an upper side joining member, FIG. 10 is an exploded view of another embodiment of a lower side joining rod, (a) is a perspective view of a lower side joining member, (B) is a cover member. 1 …… Cable drag chain 2 …… Link body 4a, 4b …… Link plate 6 …… Upper side connecting rod 7 …… Lower side connecting rod 8 …… Partition plate 44 …… Locking protrusion (protrusion) 45,46 …… Sliding Guide groove (engaged part) 47 …… Lower sliding snap engaging leg (engaging part) 48 …… Upper sliding snap engaging leg (engaging part) 70 …… Locking piece

Claims (2)

[Claims] 1. A cable drag chain having a plurality of tubular link bodies formed by connecting the upper side and the lower side of a pair of spaced apart and opposed link plates with an upper side connecting rod and a lower side connecting rod, respectively. Engages with the engaged portions formed in the longitudinal direction of the opposing surfaces of the rod and the lower side connecting rod, a plurality of protrusions arranged in the longitudinal direction of the one opposing surface, and engages with the engaged portions. A partition structure inside a cable drag chain, comprising a partition plate having engaging portions at both ends thereof, and a locking piece provided on the partition plate and engaged between the plurality of projections. 2. The partition structure inside the cable drag chain according to claim 2, wherein the engaged portion is a groove, and the engaging portion is an engaging leg piece.