JP3022241B2 - Grommet mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus used for attaching a grommet in a wire harness assembling process.

[0002]

2. Description of the Related Art For example, in a wire harness for an automobile, an electric wire bundle constituting the wire harness may be wired through a partition between a cabin and an engine room or between a cabin and a trunk room. In such a case, an accessory made of rubber or the like called a grommet is used for the wire harness. What is a grommet?
The wire bundle is attached to a through hole penetrating the partition wall, and the wire bundle is inserted into the wire insertion portion of the grommet. Therefore, it is necessary to ensure reliable waterproofness between the grommet and the wire bundle. For this reason, the grommet is adapted to be fitted to the outer peripheral surface of the wire bundle with a considerable tension. To fit the grommet into the wire bundle, do the following:

[0003] The wire insertion portion of the grommet is once expanded elastically largely. Then, in this state, the wire bundle is inserted into the wire insertion portion, and the wire bundle is strongly fitted to the wire bundle by a tension force due to elastic contraction. To expand the wire insertion portion of the grommet, a considerable force is required. In particular, when a connector is previously attached to the end of the wire bundle, the wire insertion portion of the grommet must be expanded considerably in order to allow the connector to be inserted, and a considerably large force is required. For this reason, there is a problem that the burden on the operator is large and the work efficiency is deteriorated in the continuous grommet mounting operation.

[0004]

As a countermeasure to this problem, Japanese Unexamined Utility Model Publication No. 63-128633 and Japanese Unexamined Patent Publication No.
The grommet was spread using a device as disclosed in Japanese Patent No. 342928. However, these devices have the following problems. That is, the device disclosed in Japanese Utility Model Laid-Open Publication No. 63-128633 holds the grommet expanded in advance, and inserts the wire bundle through the grommet held in this state. Therefore, the operation of expanding the grommet must still be performed manually by an operator or by using a required device. Therefore, with this device, the number of man-hours for grommet mounting work has increased, and work efficiency has not been sufficiently improved.

[0005] The grommet expanding machine disclosed in Japanese Patent Application Laid-Open No. H5-342928 is a machine arranged on a wire harness assembly line and intended to be used in a grommet mounting process in the assembly line. This grommet diameter-expanding machine employs an expanding claw that expands in a radial direction in order to expand the grommet. The expanding claw is driven by hydraulic pressure. For this reason, the structure of the grommet spreader is complicated, heavy, and very expensive.

An object of the present invention is to provide an inexpensive grommet mounting apparatus which can easily expand the grommet and mount the grommet on an electric wire bundle.

[0007]

In order to achieve the object of the present invention, a grommet mounting device according to the first aspect of the present invention is arranged such that the grommet mounting device is disposed above the gantry and is inserted through a wire insertion portion of the grommet. The first, second, third, and fourth expanding claws are provided on the base, and the expanding claws are relatively symmetrically moved in four directions. and state, and link means for displacing into a state of being separated radially from each other in this state, provided to the gantry, and a driving means for driving the link means, the Li
The link means has one end connected to the first expanding claw and the other
A fixing member having one end fixed to the upper surface of the gantry, and one end
It is connected to a second expanding claw which is arranged opposite to the first expanding claw.
And the other end is connected to the driving means, and the second expanding claw is moved to the first position.
The first to make the upper and lower claw relatively approach and separate in the vertical direction
The link member and one end are not 90 ° with respect to the first expanding claw.
Connected to the third expanding claw disposed at the
A second link member having the other end connected to a predetermined position of the gantry
And a fourth expanding end, one end of which is arranged to face the third expanding claw.
A first link portion connected to the claw and having the other end connected to the base;
A third member connected substantially symmetrically to the predetermined position with respect to the material;
Link member, and first and second link members
And the second link member interlocked with the displacement of the first link member.
A first interlocking member for displacing the link member;
Connecting the first link member to the third link member;
The second displaces the third link member in conjunction with the displacement of the material.
And an interlocking member .

According to this structure, the first, second, third and fourth expanding claws can be brought together and brought close to each other by driving the link means by the driving means. In this state, each expanding claw is inserted into the wire insertion portion of the grommet. Next, by driving the link means by the driving means, each expanding claw is radially moved in four directions. Thereby, the wire insertion portion of the grommet can be expanded in four directions. Moreover, since the linking means and the driving means for moving the expanding claws are provided on the gantry, these can be configured as a unit.
When the driving means is operated, the link means is moved to the first link portion.
The material is displaced downward, and the second expansion is performed on the first expansion claw.
The claws move downward. On the other hand, the second and third link portions
The materials are respectively connected via the first and second interlocking members.
It is displaced in conjunction with the first link member. That is, the second
When the link members rotate around a predetermined position on the
In addition, the third link member is provided around the other predetermined position of the gantry.
Pivots, so that the third and fourth expanding claws move one another.
Left in the symmetrical direction. As a result, each expanding nail has four sides
Spreading symmetrically, according to any one of claims 1 to 4
It has the same effect as Ming. In addition, each such link
Each expanding claw is moved in four directions by the member and the interlocking member.
As the driving means, the first link
Use a simple one that only moves the lock member to one side
Can be

According to a second aspect of the present invention, there is provided a grommet mounting apparatus according to the first aspect, wherein the driving means is connected to the link means, and the link means is driven by a stepping operation. And a stepping lever that separates the expanding pawls from each other, and a biasing member that elastically biases the stepping lever in the anti-stepping direction so that the expanding pawls are close to each other. Is what you do.

According to this structure, the link means is driven by stepping on the foot lever. Accordingly, the wire insertion portion of the grommet can be expanded in four directions by moving each expanding claw, and the same effect as the invention according to claim 1 can be obtained. In addition, since the stepping lever is elastically urged in the anti-stepping direction by the urging member, when the foot is released from the stepping lever, the expanding claws are moved in directions approaching each other. In particular, in the invention according to the present invention, since the link means can be driven only by stepping on the foot lever, no power source equipment such as a power source or an air source or a hydraulic source is required.

According to a third aspect of the present invention, there is provided a grommet mounting apparatus according to the second aspect, wherein when the foot lever is operated, a plurality of the grommet mounting apparatuses move along the stepping direction when the foot lever is operated. It is characterized by having a holding mechanism for holding at a position. According to this configuration, the same operation as the invention according to claim 2 is exerted. In addition, when the foot lever is operated, the foot lever can be held at a predetermined position by the holding mechanism, so that there is no need for the operator to constantly step on the foot lever to perform work. Further, since the stepping lever can be held at a plurality of positions along the stepping direction, the degree of opening of each expanding claw can be adjusted according to the thickness of the wire bundle inserted into the grommet.

According to a fourth aspect of the present invention, there is provided a grommet mounting apparatus according to the first aspect, wherein the driving means is connected to link means and operates a cylinder rod. A single-acting cylinder that drives the link means and separates the expanding claws from each other; and an elastic member that displaces the cylinder rod in a counter-acting direction by elastic force so that the expanding claws are in close proximity to each other. It is characterized by having.

According to this configuration, the link means is driven by the single-acting cylinder. Accordingly, the wire insertion portion of the grommet can be expanded in four directions by moving each expanding claw, and the same effect as the invention according to claim 1 can be obtained. In addition, since a single-acting cylinder is used, the cylinder does not operate in a direction in which the expanding claws come close to each other. Therefore, after the wire bundle is inserted through the grommet, the expansion claw is tightened by the operation of the cylinder, thereby preventing the wire bundle and the grommet from being removed. Furthermore, an elastic force is applied to the cylinder rod of the single-acting type cylinder by an elastic member in a counter-acting direction of the cylinder rod. Thus, when the operation source for operating the single-acting cylinder is stopped, the elastic force moves the cylinder rod in the counter-acting direction, and the expanding claws are moved in directions approaching each other.

[0014]

[0015]

[0016]

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a perspective view schematically showing a grommet mounting apparatus according to one embodiment of the present invention. Referring to FIG. 1, grommet mounting device (hereinafter, referred to as "device") A
Will be described. The device A is used for assembling the wire harness, for attaching the grommet, that is, for inserting the wire bundle forming the wire harness into the wire insertion portion of the grommet, and is provided so that the wire bundle can be easily passed. This is a device for expanding the wire insertion portion of the grommet in advance by the expander SN.
In order to expand the electric wire insertion portion, the expander SN is inserted into the electric wire insertion portion, and then the expander SN is expanded.

This apparatus A includes a gantry 10 and an expander SN (in this embodiment, four expanding claws 21, 22, 23, 24) arranged above the gantry 10. ,
A link mechanism LM for displacing each of the expanding claws 21, 22, 23, 24 to a predetermined state, a lever 30 for driving the link mechanism LM by a stepping operation, and a holding mechanism 40 for holding the operated lever 30 at a plurality of positions. And a spring 50 for pulling the lever 30 in the anti-stepping direction.

The gantry 10 has a leg 11 and a top plate 12. The top plate 12 can place a wire harness to which a grommet is attached, and work is performed on the top plate 12. The top plate 12 is provided with a through groove 12a through which each link member (described later in detail) configuring the link mechanism LM passes. A hook 15 for hooking a spring 50 is provided on the lower surface of the top plate 12 so as to project downward (see FIG. 4).

On the other hand, the legs 11 support the top plate 12, and pillar members 11a, 11a,
11b, 11c, and 11d. Further, in order to make the leg 11 have sufficient rigidity, between the column members 11a and 11b, the column members 11b and 11c, and the column members 11c and 11d,
The cross members 11e, 11f, and 11g are respectively connected. Further, reference numeral 13 indicates a support plate. The support plate 13 is bridged between the cross members 11e and 11g. The lower part of the link member of the link mechanism LM extends to below the support plate 13. Therefore, a slit through which the link member penetrates is formed in the support plate 13.

FIG. 2 is an enlarged perspective view showing a state where the expander SN is closed, and FIG. 3 is an enlarged perspective view showing an opened state.
Referring to FIG. 2, the expander SN includes four expanding claws 21 and 2.
2, 23, 24, and each of the expanding claws 21, 22, 2
Reference numerals 3 and 24 denote a state in which the expander SN is divided into four equal parts in the circumferential direction. Each of the expanding claws 21, 22, 23, and 24 is displaced between a state in which they are gathered and approached as shown in FIG. 2 and a state in which they are radially spread apart from each other as shown in FIG. Is available. As described above, the link mechanism LM displaces the expanding claws 21, 22, 23, and 24 between the close state and the separated state.

In a state where the expanding claws 21, 22, 23, and 24 are close to each other, as shown in FIG.
It has a so-called tapered substantially conical shape. By forming the expander SN in such a tapered shape, the grommet can be easily inserted into and removed from the wire insertion portion. In addition, each expanding claw 21, 22, 23, 2
As shown in FIG. 3, in a state in which the four are separated from each other, the expanding claws 21, 22, 23, and 24 are radially spread in four directions (up, down, left, and right directions) symmetrically. Further, mounting pieces 21a, 22a, 23a, 24a for mounting the respective expanding claws 21, 22, 23, 24 to the link mechanism LM are provided at the base ends of the expanding claws 21, 22, 23, 24. Is formed.

FIG. 4 is a front view of the apparatus A, showing the link mechanism LM in detail. With reference to the figure, the link mechanism LM includes a fixed link member 61 to which the expanding pawl 21 is attached, a first link member 62 to which the expanding pawl 22 is attached, and a second link member to which the expanding pawl 23 is attached. The second link member 63 and the third link member 6 to which the expanding claw 24 is attached
4, the first and second link members 63 and 64 are displaced in conjunction with the displacement of the first link member 62, respectively.
It has an interlocking member 65 and a second interlocking member 66.

Referring to FIGS. 2 and 4, fixed link member 61 is formed of a flat plate and has a substantially L-shape. The expanding claw 21 is fastened and fixed to one end of the fixed link member 61 using a bolt B1. In addition, the fixed link member 61
Is fixedly fastened to the top plate 12 using bolts B2. The first link member 62 is formed of a straight elongated plate. The upper portion of the first link member 62 protrudes upward through a through groove 12 a provided in the top plate 12. The expanding claw 22 is fastened and fixed to the upper end of the first link member 62 using a bolt B1. Thereby, the expanding claw 22
It is arranged below the expanding claw 21 so as to face the expanding claw 21. On the other hand, the lower part of the first link member 62 is inserted into the support plate 13. The lower end of the first link member 62
It is connected to the lever 30 via the pin P1. Therefore, the first link member 62 is slidable vertically with respect to the top plate 12 and the support plate 13.

The second link member 63 has a substantially U-shape and has a fixed arm 63a and an operating arm 63b. The fixed arm portion 63a and the operating arm portion 63b are straight elongated plates. Both 63a, 63
One ends of b are fixed by, for example, welding in a state of being overlapped in the thickness direction. That is, the operating arm 63b is disposed on the side facing the direction perpendicular to the paper surface in FIG. 4 with respect to the fixed arm 63a.

The upper part of the second link member 63 (the upper part of the operating arm 63b) protrudes upward through the through groove 12a. The expanding claw 23 is fastened and fixed to the upper end of the operating arm portion 63b using a bolt B1. Thereby, the expanding claw 23 is arranged at a position shifted to the left by 90 ° with respect to the expanding claw 21. On the other hand, the second link member 63
(The other end of the fixed arm 63a) is rotatably connected to the lower surface of the top plate 12 via a pin P1.

The third link member 64 is connected to the second link member 6.
3, and has a fixed arm portion 64a and an operating arm portion 64b. Fixed arm 64a
With respect to the operating arm 63b of the second link member 63,
In FIG. 4, it is arranged on the side facing in the direction perpendicular to the paper surface. The operating arm portion 64b is disposed on the near side in a direction perpendicular to the paper surface in FIG. 4 with respect to the fixed arm portion 64a. Accordingly, the operation arm portions 63b, 64b of the second link member 63 and the third link member 64 are arranged on the same plane, and the first arm is provided between the operation arms 63b, 64b.
A link member 62 is provided. The fixed arm portion 64a and the operating arm portion 64b are connected to the second link member 63.
In the same manner as described above, they are fixed by welding, for example.

The upper portion of the third link member 64 (the upper portion of the operation arm portion 64b) protrudes upward through the through groove 12a. The expanding claw 24 is fastened and fixed to the upper end of the operating arm portion 64b using a bolt B1. As a result, the expanding claw 24 is disposed at a position shifted to the right by 90 ° with respect to the expanding claw 21, that is, at a position facing the expanding claw 23. On the other hand, the other end of the third link member 64 (the other end of the fixed arm 64a) is rotatably connected to the lower surface of the top plate 12 via the pin P1. The portion where the other end of the fixed arm portion 64a of the third link member 64 is connected, and the portion where the other end of the fixed arm portion 63a of the second link member 63 is connected, with the first link member 62 interposed therebetween. They are arranged symmetrically.

The first interlocking member 65 is made of a straight and elongated flat plate. The first interlocking member 65 is disposed on the other side of the first link member 62 in a direction perpendicular to the paper surface of FIG. Both ends of the first interlocking member 65 are connected to the operating arm portions 63 b of the first link member 62 and the second link member 63.
Side is rotatably connected via pins P2 and P1, respectively. That is, the lower end of the first interlocking member 65
The pin P2 is connected to the first link member 62, and the upper end is connected to a fixed portion of the second link member 63 between the fixed arm 63a and the operating arm 63b.

The second interlocking member 66 is similar to the first interlocking member 65, and is formed of a straight elongated plate. The second interlocking member 66 is disposed on the near side of the first link member 62 in a direction perpendicular to the paper surface of FIG. Both ends of the second interlocking member 66 are connected to the first link member 62 and the third link member 62.
The link member 64 is rotatably connected to the operation arm 64b side via pins P2 and P1, respectively. That is, the lower end of the second interlocking member 66 is connected to the first link member 62 together with the lower end of the first interlocking member 65 by the pin P2, and the upper end is connected to the third link member 64.
Are connected to a fixed portion between the fixed arm portion 64a and the operating arm portion 64b.

Next, referring to FIGS. 1 and 4, the lever 30 is formed of a straight elongated plate, and the base end 31 is provided with a cross member 11f provided on the leg 11 via a pin P3.
Is rotatably connected to the A pedal 32 is attached to the tip of the lever 30 so that a foot operation can be easily performed. At a substantially central portion of the lever 30, an elongated hole 33 is provided along the longitudinal direction of the lever 30. This long hole 3
3, the pin P1 is inserted, and the first pin P1 is inserted through the pin P1.
The lower end of the link member 62 is rotatably connected to the lever 30. Therefore, the lever 30 is operated by stepping on the
When rotated in the direction of the hollow arrow, the first link member 6
The lower end of 2 moves straight downward while sliding in the long hole 33, and the link members 61, 62, 63, 64, 6
5, 66 are in the state shown in FIG. Also, lever 30
Is provided with a hook 34 for attaching a spring 50.

The holding mechanism 40 has a locking projection 41 and a locking plate 42. The locking projection 41 is made of a member having an L-shaped cross section, and is attached to the lever 30 by, for example, welding. On the other hand, the locking plate 42 is made of a flat plate,
An engagement recess 42a with which the locking projection 41 engages is provided. The engagement recesses 42 a are provided at two places along the stepping direction of the lever 30. Note that this engagement recess 42
a can be provided in large numbers.

The spring 50 is a so-called tension spring, and both ends thereof are hooked and connected to the hook 15 provided on the top plate 12 and the hook 34 provided on the lever 30. Thus, the lever 30 is constantly urged to rotate in the anti-stepping direction, that is, in the direction opposite to the white arrow. FIG. 6 is an enlarged view of a main part showing in detail the connection structure between the base end 31 of the lever 30 and the cross member 11f. Referring to FIG. 6, a base end portion 31 of lever 30 is rotatably supported by pins P1 whose both ends are supported by two opposed mounting brackets BK1. A gap S is formed between the two mounting brackets BK1. Therefore, the lever 30 moves between the gaps S.
You can move left and right freely.

Accordingly, when the lever 30 is turned down by stepping on the foot and the lever 30 is moved to the right side and then released from the lever 30, the lever 30 is pulled upward by the spring 50. The tip 41 a of the locking projection 41 protruding from the lever 30 is engaged with the engagement recess 42 a of the locking plate 42. Thereby, the posture of the lever 30 can be maintained (see FIG. 5).

According to this embodiment, the following operational effects can be obtained. First, referring to FIGS. 1 and 4, in a normal state, the lever 30 is urged by the spring 50 to rotate upward, so that the first link member 62 is
It has been pushed up. Thereby, each expanding claw 2
1, 22, 23, and 24 are gathered together and are in close proximity (see FIG. 2). In this state, each expanding claw 2
Insert 1, 22, 23, 24 into the wire insertion portion of the grommet to be mounted.

Next, referring to FIG. 5, when the lever 30 is depressed and turned in the direction of the white arrow in FIG. 4, the first link member 62 is pulled downward. As a result, each of the expanding claws 21, 22, 23, and 24 is connected via the link mechanism LM.
It is displaced in a state of spreading radially in four directions (see FIG. 3). More specifically, when the lever 30 is stepped on, the first link member 62 is displaced downward, and
In response, the expanding claw 22 moves downward. On the other hand, the second and third link members 63 and 64 are connected to the first link member 62 via the first and second interlocking members 65 and 66, respectively.
Displaces in conjunction with. That is, while the second link member 63 rotates around a predetermined position on the lower surface side of the top plate 12,
The third link member 64 rotates around another predetermined position on the lower surface side of the top plate 12, whereby the expanding claws 23 and 24
Separate symmetrically from each other. Therefore, the wire insertion portion of the grommet can be expanded symmetrically in four directions. In this state, the wire bundle of the wire harness to which the grommet is to be attached is inserted into the wire insertion portion.

Subsequently, when the foot is released from the lever 30, the elastic force of the spring 50 causes the lever 30 to rotate in the anti-stepping direction, and the expanding claws 21, 22, 23, and 24 come together and come close to each other. At the same time, the bundle of wires inserted is tightened by the tensile force of the elastic contraction of the grommet. The electric wire bundle inserted into the electric wire insertion portion is provided with each of the expanding claws 21, 22, 23,
24, the respective expanding claws 2 adjacent to each other while approaching each other.
Each of the expanding claws 21, 22, 2 from between 1, 22, 23, 24
Pull out outside of 3,24. Then, the grommet can be detached from the spreader SN and attached to the wire bundle by pulling the wire bundle toward the distal end of the spreader SN.

As described above, the wire insertion portion of the grommet can be easily and easily expanded only by stepping on the lever 30, so that the grommet can be mounted on the wire bundle without imposing a large burden on the operator. . Moreover,
Since the link mechanism LM for displacing the expanding claws 21, 22, 23 and 24 and the lever 30 for driving the link mechanism LM have a simple structure and are provided on the gantry 10, the apparatus A
Can be easily configured as a unit. Therefore, the installation location is not limited, and the device can be easily relocated. As a result, the device A can be used for mounting a grommet on a wire harness assembly line, or for mounting an independent grommet away from the line.

In addition, the device A according to the present embodiment has the following operational effects. Since the link mechanism LM can be driven only by the stepping operation of the lever 30, the power source equipment such as a power source, an air source, or a hydraulic source is not required, and the apparatus A can be manufactured at a low cost with a simple structure. Since the operated lever 30 can be held at a predetermined position by the holding mechanism 40, there is no need for the operator to constantly step on the lever 30 to perform the operation. Therefore, the burden on the operator in the grommet mounting operation is further reduced,
Even continuous work can proceed efficiently. Further, since the lever 30 can be held at two positions (in some cases, a plurality of positions) along the stepping direction,
The degree of opening of the expanding claws 21, 22, 23, and 24 can be adjusted according to the thickness of the wire bundle inserted into the grommet.

When the first link member 62 is displaced downward by the lever 30, each of the link members 63, 64, 65, and 6 is displaced.
6 are displaced in conjunction with each other, and the respective expanding claws 21, 22, 23, 24
Are spread symmetrically in four directions, and as a means for driving the link mechanism LM, an extremely simple structure such as the lever 30 can be adopted. As a result, the device A can be manufactured even more cheaply. Further, as a means for driving the link mechanism LM, a simple means capable of moving the first link member 62 to one side may be employed.

The present invention is not limited to the above embodiment, but can be modified as shown in FIG.
Referring to FIG. 7, the feature of this modification is that, in one embodiment, the first link member 62 is displaced by the stepping operation of the lever 30, whereas in this modification, the air cylinder 80 is To displace the first link member 62, and to use the column members 11a and 11
b, 11c, 11d can be adjusted in height,
In the lower part of each column member 11a, 11b, 11c, 11d,
The point is that the casters 90 are provided.

The other configuration is the same as that of the embodiment, and the same components are denoted by the same reference numerals and the description thereof will not be repeated. The air cylinder 80 is a single-action type having a cylinder tube 81 and a cylinder rod 82. That is, by supplying air, the cylinder rod 82 operates in a contracting direction. In FIG. 7, the cylinder rod 82 is in an extended state.
1, 22, 23, and 24 are in a state of being close to each other.

The cylinder tube 81 is mounted on the leg 11 by a mounting bracket BK5. More specifically, the legs 11 include cross members 11e and 11
g (see FIG. 1), and a stay ST1 is provided so as to bridge the cross members 11e and 11g. The mounting bracket BK5 is fastened to the stay ST1 using a bolt B5 and a nut N5.
The cylinder tube 81 is fastened to the mounting bracket BK5 using, for example, a bolt (not shown). The mounting bracket BK5 has a long hole 1
6a are provided, and a bolt B5 is inserted into the elongated hole 16a. Thereby, the mounting height of the air cylinder 80 can be adjusted, and the degree of opening of each expanding claw can be adjusted.

The distal end 82a of the cylinder rod 82 is connected to a link mechanism LM via a pin P2. That is, the distal end portion 82a of the cylinder rod 82 is connected to the first link member 62, the first interlocking member 65, and the second interlocking member 66.
At the same time, each is rotatably connected to each other by one pin P2. Further, two springs 50 are provided to pull the cylinder rod 82 upward, that is, in the direction in which the cylinder rod 82 is not operated. Both ends of each spring 50 are connected to the cylinder rod 82 side and the top plate 12 side. Specifically, two hooks 15 are provided on the lower surface side of the top plate 12 and almost directly above the cylinder rod 82. Each end of each spring 50 is hooked on the pin P2 and the hook 15. The one spring 50 is arranged on the near side of the pin P2 in the direction perpendicular to the plane of the paper, and the other spring 50 is arranged on the other side in the direction perpendicular to the plane of the paper. In this modification, the spring 5
Although two 0s are used, one may be used.

Reference numeral AU is an electromagnetic valve for supplying air to the air cylinder 80. This solenoid valve AU has
Although not shown, a required air supply device (for example, a compressor or the like) is connected. Also, reference numeral FS
Is a foot switch that provides an input for driving the solenoid valve AU. The foot switch FS has a so-called self-holding function. When the foot switch FS is depressed once, air is supplied to the air cylinder 80 and the cylinder rod 82 contracts. Then, when the driver steps again, the supply of air to the air cylinder 80 is stopped. In this state, the spring 50 causes the cylinder rod 82 to be pulled upward and extended. Reference numeral PL indicates a supply line for sending air from the solenoid valve AU into the cylinder tube 81.

On the other hand, a stone projection 16 is provided at the lower end of the leg 11. Specifically, each column member 11a of the leg 11
At the lower ends of 11b, 11c, 11d, project downward.
A so-called stud bolt SB is provided. Also,
The stone protrusion member 16 is provided with a screw hole (not shown). And the stud bolt SB is screwed into the screw hole of the stone protrusion member 16 and attached. Therefore, the height of the stone projection member 16 can be adjusted by rotating the stone projection member 16 with respect to the stud bolt SB.

Further, each column member 11a, 11b, 11
A stay ST2 is provided below c and 11d, and a caster 90 is attached to each of the stays ST2. Therefore, the device A is supported by the casters 90 by rotating the stone projecting member 16 to lower its height. In addition, the stone protrusion member 1
By increasing the height of 6, the device A can be supported by the stone projecting member 16.

According to this modification, the following operation is achieved. Depress the foot switch FS and press the air cylinder 8
0, thereby driving the link mechanism LM. In other words, when the foot switch FS is depressed once, the cylinder tube 81 passes from the solenoid valve AU through the supply line PL.
Air is supplied into the inside. Thereby, the cylinder rod 8
2 is contracted, and the first link member 62 is displaced downward. Due to the displacement of the first link member 62, each of the link members 63, 64, 65, 6 constituting the link mechanism LM is provided.
6 is displaced. As a result, each expanding claw 21, 22, 23,
By displacing the wire 24, the wire insertion portion of the grommet inserted into the spreader SN can be expanded in four directions.

In addition, the cylinder rod 82 is
Therefore, when the foot switch FS is depressed again to stop the operation of the air cylinder 80, the cylinder rod 82 is extended by the elastic force of the spring 50, and the first link member 62 is moved. It is pushed up. As a result, each expanding claw 2
1, 22, 23, and 24 move in directions approaching each other.

In this modified example having the above operation,
An effect similar to that of the embodiment is obtained. Further, since the link mechanism LM is driven by the air cylinder 80, the work can be performed more easily than the stepping operation, and the burden on the operator can be greatly reduced. Further, since the single-acting air cylinder 80 is used, the cylinder rod 82 does not extend due to air. That is, by operating the air cylinder 80 by supplying air, the expanding claws 21, 22, 23, and 24 do not move in directions approaching each other. Therefore, if a double-acting cylinder is used, if the cylinder rod 82 is extended, the first link member 62 will be pushed up by a large force. Due to this, the wire bundle inserted into the grommet is strongly tightened by the respective expanding claws 21, 22, 23, and 24, and there is a possibility that the wire bundle may be damaged or may not come off from the expander SN. In the example, there is an advantage that there is no such fear. In addition, it is possible to prevent an accident in which the operator accidentally pinches a finger or the like between the expanding claws 21, 22, 23, and 24 by mistake.

By the way, if the spring 50 is not provided, the first link member 62 is not pulled upward, and the expanding claws 21, 22, 23, 24 do not move in the approaching direction. Rather, the first link member 62 tends to be displaced downward by the weight of the cylinder rod 82 and the first link member 62. Therefore, when the supply of air is stopped, the spreader SN is in an open state, and it is not possible to mount the grommet on the spreader SN in the next operation.

Further, as the spreader SN tends to open naturally, a force is applied in the direction of expanding the grommet with the wire bundle inserted, and it becomes difficult to remove the grommet from the spreader SN. On the other hand, in the present modified example, each of the expanding claws 21, 22, 2
3 and 24 are moved in the approaching direction, so that the spreader SN
Can be securely closed without strongly tightening the wire bundle, and the grommet does not become difficult to remove from the spreader SN.

The device A can be easily moved by rotating the stone projecting member 16 to lower its height and supporting the device A by the casters 90. Further, by increasing the height of the stone protrusion 16, the device A can be supported by the stone protrusion 16 in a fixed state. Therefore, there is an advantage that the transfer of the device A can be performed more smoothly than in the embodiment.

In addition, in one embodiment and a modified example,
Since the expanding claws 21, 22, 23, and 24 are fastened by the bolts B1, they can be easily replaced with expanding jaws of other shapes. As a result, even if the shape of the grommet to be mounted is changed, it is possible to easily cope with this change, and the versatility of the device A can be improved.

[0055]

As described above, according to the first aspect of the present invention, by operating the driving means, each expanding claw inserted into the wire insertion portion of the grommet via the link means is symmetrical in four directions. This allows the wire insertion portion to be expanded and the wire bundle to be easily inserted into the wire insertion portion. In addition, since the link means and the driving means for moving each expanding claw have a simple structure and are provided as a unit on the gantry, the installation place is not limited and the transfer means can be easily moved. . Therefore, by installing the grommet mounting device at a required location, the grommet mounting device can be used for a grommet mounting operation on a wire harness assembly line or an independent grommet mounting operation remote from the line. In addition, each link member and interlocking member
Therefore, since each expanding claw is displaced symmetrically in four directions,
As the step, the first link member is reciprocated in one direction.
Can adopt simple things that can be
There are advantages.

According to the second aspect of the present invention, the same effects as those of the first aspect of the invention can be obtained. In addition, in the invention according to the present invention, a power source, a power source equipment such as an air source or a hydraulic source is not required, and the link means can be driven only by stepping on the foot lever. Absent. Moreover, it can be manufactured at a low cost with a simple structure. Furthermore, when the foot is released from the foot lever, the respective expanding claws are moved in a direction approaching each other by the urging member. Therefore, after inserting the wire bundle through the grommet, the grommet can be easily pulled out from each expanding claw. Can be.

According to the third aspect of the invention, the same effect as that of the second aspect of the invention can be obtained. In addition, since the foot lever can be held at a predetermined position, there is no need for the worker to constantly step on the foot lever to perform work, and the burden on the worker can be reduced. Furthermore, since the degree of opening of each expanding claw can be adjusted, the diameter of the wire insertion portion of the grommet can be expanded to an optimum diameter according to the thickness of the wire bundle to be inserted into the grommet.

According to the fourth aspect of the invention, the same effects as those of the first aspect of the invention can be obtained. In addition, since the diameter of the wire insertion portion of the grommet is increased by driving the link means by the single-acting cylinder, the work load can be greatly reduced, and the grommet mounting operation can be performed extremely easily. Further, since a single-acting cylinder is used, the expanding claws do not move in the directions approaching each other by the cylinder. As a result, there is no possibility that the wire bundle inserted into the grommet is damaged by being strongly pinched by each of the expanding claws, and the wire bundle is not stuck. In addition, it is possible to effectively prevent an accident in which a finger or the like is strongly pinched between the expanding claws. On the other hand, if the operation source for operating the single-acting cylinder is stopped, the cylinder rod is moved by the elastic member, and the expanding claws move in the direction approaching each other without strongly tightening the wire bundle, so that the double-acting By moving the cylinder rod using the mold cylinder and bringing the expanding claws close to each other, a large force that strongly tightens the wire bundle is not applied, and the wire bundle can be easily pulled out from between the expanding claws. it can.

[0059]

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state where the spreader is closed.

FIG. 3 is a perspective view showing a state where the spreader is opened.

FIG. 4 is a front view of the device with the spreader closed.

FIG. 5 is a front view of the device with the spreader open.

FIG. 6 is an enlarged view of a main part showing a connection structure of a base end portion of a lever.

FIG. 7 is an enlarged front view of a main part of an apparatus according to a modification.

[Explanation of symbols]

 A device SN expander LM link mechanism 10 gantry 21 expanding claw 22 expanding claw 23 expanding claw 24 expanding claw 30 lever 40 holding mechanism 50 spring 61 fixed link member 62 first link member 63 second link member 64 first 3 link member 65 1st interlocking member 66 2nd interlocking member 80 Air cylinder 82 Cylinder rod

Claims (4)

(57) [Claims] 1. A gantry, first, second, third and fourth expanding claws arranged above the gantry and capable of being inserted through a wire insertion portion of a grommet; A link means for displacing the expanding claws relatively symmetrically in four directions so that the expanding claws are gathered and approached to each other, and displaced from this state radially away from each other; , and drive means for driving the link means, said link means has the other end on the frame with one end connected to the first expansion nail
A fixing member fixed to the surface portion and a second expanding claw , one end of which is opposed to the first expanding claw.
And the other end is connected to the driving means, and
The open nail is vertically moved relatively to and away from the first expanding nail.
A first link member to be moved and one end thereof located at a position shifted by 90 ° from the first expanding claw.
Connected to the third expanding claw and the other end
A second link member connected to a fixed position and a fourth expanding claw , one end of which is disposed to face the third expanding claw.
And the other end is connected to the first link member of the gantry.
On the other hand, a third rib connected to a position substantially symmetrical with the predetermined position.
Link member , the first link member and the second link member,
Displaces the second link member in conjunction with the displacement of the link member
A first linking member to be connected, a first link member and a third link member,
The third link member is displaced in conjunction with the displacement of the third link member.
Characterized by having a second interlocking member
Grommet mounting device. 2. The grommet mounting device according to claim 1, wherein the driving means is connected to the link means, drives the link means by a stepping operation, and separates the expanding claws from each other. A grommet mounting device, comprising: a biasing member that resiliently biases the foot lever in the anti-stepping direction so that the claws come close to each other. 3. The grommet mounting device according to claim 2, further comprising: a holding mechanism for holding the foot lever at a plurality of positions along the stepping direction when the foot lever is operated. apparatus. 4. The grommet mounting device according to claim 1, wherein the driving means is connected to the link means, and drives the link means by operating a cylinder rod to separate the expanding claws from each other. A grommet mounting device, comprising: a cylinder; and an elastic member for displacing the cylinder rod in a counter-acting direction by an elastic force so that the expanding claws come close to each other.