JPH0525573B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support device for a mold storage body that accommodates and supports molds in a bending machine such as a press brake.

A rack device is generally used as a device for storing and supporting a mold in a bending machine. However, in order to automatically replace the molds in the bending machine, a plurality of link members are pivotally connected in an endless manner, and a mold storage body for storing and supporting the molds is provided in the plurality of link members. A device with a different configuration has been developed. In the case of such a configuration, it is necessary to guide the plurality of link members with rigid guide rails so as not to cause any problems even when supporting a heavy mold.

The present invention includes a plurality of link members integrally provided with a mold storage body capable of storing and supporting molds in a bending machine, for example, which are pivotally connected to each other in an endless manner, and each link member is connected by a guide rail. This invention was invented so that each link member can smoothly turn along the guide rail without causing a large play between each link member and the guide rail during guiding.

Now, referring to Fig. 1, what is generally indicated by the reference numeral 1 is a bending machine such as a press brake, which, like a general press brake, has C-shaped left and right side frames 3L and 3R. We are prepared. The upper parts of the left and right side frames 3L, 3R are integrally connected by an upper frame 5, and the lower parts are connected by a lower frame 7. A long lower mold 9 is detachably attached to the upper part of the lower frame 7, and above the lower frame 7,
A ram 13 supporting an upper die 11 which cooperates with the lower die 9 to bend the plate material S is provided so as to be movable up and down. The ram 13 is attached to the side frames 3L, 3
It is connected to a vertically movable piston rod of hydraulic cylinders 15L and 15R supported by R, and is moved vertically by the operation of the hydraulic cylinders 15L and 15R.

In order to attach and detach the lower die 9 and the upper die 11 to the bending machine 1, the lower die 9 and the upper die 1 are
1 is provided so as to be movable in the longitudinal direction with respect to the lower frame 7 and the ram 13 and to be detachable and replaceable.
Further, on one side of the bending machine 1, a mold changing device 17 for attaching and removing the lower die 9 and the upper die 11 to and from the bending machine 1 is disposed. As will be explained in detail later, the mold changing device 17 is
It is provided with a plurality of mold storage bodies that can freely store the lower mold 9 and the upper mold 11, and is also provided with a mold loading/unloading device that pushes and pulls the lower mold 9 and the upper mold 11 in the longitudinal direction to carry them in and out.

Although the mold changing device 17 stores the long lower mold 9 and upper mold 11 used in the bending machine 1, its width in the left and right direction is equal to the width in the left and right direction of the bending machine 1. In comparison, it is considerably smaller, for example, 1/2 or 1/3. Therefore, the mold changing device 17 is considerably smaller than the bending machine 1, and the area of a factory or the like can be effectively utilized. In other words, the mold changing device 17 is configured to divide the long lower mold 9 and upper mold 11 into a plurality of parts and store them therein.

In order to store the parts divided into a plurality of parts, the lower mold 9 and the upper mold 11 are each divided into a plurality of divided lower molds 9D and a plurality of divided upper molds 11D, as shown in FIG. Note that a detailed explanation of the structure for dividing the lower mold 9 and the upper mold 11 into a plurality of parts and the structure for connecting the divided parts will be omitted.

Referring to FIGS. 1, 2, and 3, the mold changing device 17 has a plurality of supporting legs 55.
It is constituted by a box-shaped frame 57 supported by. A loading/unloading port 61 for loading and unloading the lower mold 9 and the upper mold 11 is opened in one side plate 59 where the frame 57 faces the bending device 1.
The other side plate 63 on the opposite side is provided with an opening 65 for observing the inside. Therefore, the mold changing device 17 can carry in and out the lower mold 9 and the upper mold 11 from the loading/unloading port 61, and the opening 65
It is possible to observe the internal state from inside.

Referring again to FIGS. 2 and 3, a portion of the one side plate 59 and the other side plate 63 are the adjustment side plates 59A,
63A, respectively. The above adjustment side plate 6
3A is slightly adjustable in the direction toward and away from the other side plate 63, and the lower part of the adjustable side plate 63A is connected to a bracket 67 fixed to the lower part of the other side plate 63.
It is pivotally connected to via a pivot 69. Near the top of the other side plate 63 and the adjustment side plate 63A, L-shaped brackets 71 are mounted facing each other.
A pull bolt 73 and a push bolt 75 are attached to the bracket 71 for adjusting the approach and separation of the adjustment side plate 63A from the other side plate 63. Further, brackets 77 are fixed to appropriate locations on the other side plate 63, and the brackets 67 are provided with tightening fixtures 79 made of bolts, nuts, etc., for fixing the brackets 77 through long holes drilled in the adjustment side plate 63A. It is installed. Therefore, after slightly adjusting the adjustment side plate 63A in the direction toward and away from the other side plate 63,
The adjustment side plate 63A can be fixed to the other side plate 63.

The connection structure between the one side plate 59 and the adjustment side plate 59A is the same as the connection structure between the other side plate 63 and the adjustment side plate 63A described above, so a detailed explanation thereof will be omitted. In addition, the one side plate 59 facing the
The other side plate 63 and each adjustment side plate 59A and 63A are integrally connected via a plurality of beam members 81, respectively. Therefore, the adjustment side plates 59A, 63A move toward and away from the one side plate 59 and the other side plate 63 simultaneously. The above adjustment side plate 5
Adjustments 9A and 63A are made to appropriately tension the endless mold support device, which will be described later.

As is clear from FIGS. 2 to 4, inside the box-shaped frame 57 of the mold changing device 17, a plurality of mold storage bodies 83 capable of storing the lower mold 9 and the upper mold 11 are installed. In addition, a mold loading/unloading device 85 for pushing and pulling the lower mold 9 and upper mold 11 stored in the mold storage body 83 to carry them in and out is installed inside.

As best shown in FIG. 4, the mold storage body 83 is made of a channel member, and both ends thereof extend until close to the inner surfaces of the one side plate 59 and the other side plate 63. The mold storage body 83
A plurality of lower mold holder support rollers 87 for supporting the lower mold holder 19 supporting the divided lower mold 9D are rotatably attached to face each other near the entrance on the inner surface of the lower mold holder support rollers. A plurality of regulating members 89 are attached to prevent the lower die holder 19 from separating from the lower mold holder 87. Furthermore, a ball plunger 91 is installed at an appropriate position near the entrance to hold the lower mold holder 19 so that it does not easily move due to vibrations or the like.

Moreover, the upper die holder 3 supporting the split upper die 11D
5, a plurality of upper mold holder support rollers 93 are rotatably attached to face each other near the bottom of the mold storage body 83. A regulating member 95 is attached to prevent the mold holder 35 from separating. Further, on the inner surface of the mold storage body 83, a plurality of swing regulating members 97 are disposed facing each other to restrict the swinging of the upper mold holder 35, and the upper mold holder 35 may move due to vibration or the like. A plurality of holder blocks 101 each having a ball plunger 99 for holding the block so that it does not move easily are attached at appropriate positions.

As understood from the above configuration, the mold storage body 8
3 can accommodate either the divided lower mold 9D or the divided upper mold 11D.

As shown in FIGS. 2 to 4, both ends of the mold storage body 83 are integrally supported by link members 103 and 105, respectively, and a large number of link members 103 and 105 each support a hinge pin 107. They are connected in an endless manner via the pivots. Each hinge pin 107 has an inner roller 1
09 is rotatably mounted, and each inner roller 10
9 is the adjustment side plate 59 from the inner surface of the one side plate 59.
The guide rails 111 and 113 are in contact with the inner circumferential surfaces of the guide rails 111 and 113, which are connected in an endless manner from the inner surface of the other side plate 63 to the inner surface of the adjustment side plate 63A.

Every other link member 103, 105 has
A guide rail 111 corresponding to the inner roller 109,
An outer roller 115 that contacts the outer circumferential surface of roller 113 is rotatably mounted. Therefore, the plurality of mold storage bodies 83 whose both ends are supported by the respective link members 103 and 105 can pivot along the guide rails 111 and 113.

As understood from the above description, each link member 103, 105 has inner and outer rollers 109, 115.
first link members 103A, 105A with
B, 105B are arranged alternately, and the first and second
Link members 103A, 105A; 103B, 1
05B are pivotally connected to each other to form a ring shape.

As is clear from FIGS. 2 and 4, the mold storage body 83 is located inside the guide rails 111, 113. Therefore, the mold storage body 83
When the divided lower mold 9D or the divided upper mold 11D is stored in the interior, the center of gravity is located at the guide rail 111,
It will be located inside 113. Therefore, when moving from the straight part of the guide rails 111, 113 to the arcuate part of the guide rails 111, 113, the inertia in the tangential direction is smaller in comparison. Therefore, the motor for turning the mold housing 83 along the guide rails 111, 113 can be small, and the necessary indexing of the mold housing 83 becomes easy.

By the way, the first link member 103A, which contacts the inner and outer peripheral surfaces of the guide rails 111 and 113,
When the inner and outer rollers 109, 115 provided in 105A move, it is desirable that the distance between the inner and outer rollers 109, 115 and the guide rails 111, 113 be zero.

Therefore, the first link members 103A, 10
When the inner and outer rollers 109, 115 of 5A pass through the straight parts of the guide rails 111, 113,
In a state where the guide rails 111, 113 are sandwiched between the inner and outer rollers 109, 115 from orthogonal directions, a straight line connecting the axes of the inner and outer rollers 109, 115 is perpendicular to the guide rails 111, 113, and the inner roller 9 center distance and outer roller 115
It is desirable that the distances between the axes of the two axes are equal to each other.

Further, when the first link members 103A, 105A pass through the arcuate portions of the guide rails 111, 113, the center of the arcuate portion and each outer roller 1
Inner roller 1 is placed on a straight line in the radial direction connecting the axis of
09, and the inner and outer rollers 109, 11
5 guide rails 111, 11 from the radial direction.
It is desirable that the distance between the axes of the inner roller 109 be smaller than the distance between the axes of the outer roller 115.

However, as mentioned above, the inner and outer rollers 10
If the distances between the axes of 9 and 115 are equal,
Since the interval between the inner and outer rollers 109, 115 is approximately equal to the thickness of the guide rails 111, 113, the inner roller 109 is caused by the difference in diameter between the outer circumferential surface and the inner circumferential surface of the guide rails 111, 113 in the arcuate portion.
The distance between the axes is reduced, and the guide rails 111 and 113 are held extremely firmly, making smooth movement difficult.

Conversely, as described above, the inner and outer rollers 109,
In the configuration in which the guide rails 115 are arranged in advance on a straight line in the radial direction of the arc-shaped portion, the guide rails 111, 11
3, the inner and outer rollers 109,1
Play between 15 and guide rails 111, 113
There is a problem that (interval 〓) becomes large.

Therefore, in this embodiment, in consideration of both of the above problems, the straight portions and arcuate portions of the guide rails 111 and 113 are connected to the first link members 103A and 103A.
Even when 05A passes through, the distance between the guide rails 111, 113 and the inner and outer rollers 109, 115 is always kept almost constant, so that the distance between the guide rails 111, 113 and the inner and outer rollers 109, 115 is kept almost constant, so that smooth movement can be achieved without any large play. It is constructed so that it can be moved.

That is, in this embodiment, the center O of the arcuate portion of the guide rails 111, 113 and the inner rollers 10 at both ends of the first link members 103A, 105A
When the angle formed by the imaginary line OA connecting the axis A of the guide rail 111 and the axis A of the guide rails 111 and 113 is θ, the distance 〓 is always kept almost constant, taking into account the balance between the arcuate portion and the straight portion, regardless of the thickness of the guide rails 111 and 113. The axis A of the inner roller 109 and the axis B of the outer roller 115 are
The distance between the axes of the inner roller 109 is set slightly smaller than the distance between the axes of the outer roller 115 so that the angle formed by the imaginary line AB connecting the imaginary line AB and the imaginary line OA is approximately θ/4. Members 103A, 105
It is attached to both ends of A. In other words, as can be understood from FIG. 4, the inner roller 109 is shifted from the radial straight line connecting the axis of the outer roller 115 and the center O of the arcuate portion, and is moved to the first link member 103A. , 105A, and the distance between the axes of the inner roller 109 is set to the outer roller 1.
The distance between the axes is smaller than that of No. 15.

Therefore, each first link member 103A, 10
Even if the guide rails 111, 113 are located in the straight or arcuate portions, a large gap may occur between the guide rails 111, 113 and the inner and outer rollers 109, 115. The first link members 103A and 105A can move smoothly along the guide rails 111 and 113. Second link member 103
Since both ends of B and 105B are pivotally supported by the first link members 103A and 105A on both sides, the second
Of course, the link members 103B and 105B can be moved smoothly.

Each link member 103A, 105A; 103B,
105B along the guide rails 111, 113, the frame 5 of the mold changing device 17
7 is equipped with a drive motor 117. Third
As shown in the figure, the drive motor 117 is mounted inside the side plates 59, 63, and both ends of a rotating shaft 121 are connected to the drive motor 117 via a reduction gear 119 provided in the drive motor 117. It is rotatably supported by the one side plate 59 and the other side plate 63. Pinions 123 are attached near both ends of this rotating shaft 121, and each pinion 123 meshes with a rack 125 attached to each of the first and second link members 103A, 105A; 103B, 103B. . Therefore,
By rotating the pinion 123 by the drive motor 117, each of the first and second link members 10
3A, 105A; 103B, 103B is easy 1
25 and along the guide rails 111 and 113.

First and second link members 103A, 105
A; In order to facilitate the indexing of the mold housing 83 supported by 103B and 105B, the number of teeth of the pinion 123 and the number of teeth of each rack 125 are set to be the same. Therefore, one revolution of the pinion 123 will feed one rack by 125 minutes. Further, a dog 127 is attached to each rack 125, and a limit switch 1 for detecting the dog 127 is installed at an appropriate position on the frame 57.
29 is installed. Therefore, by the action of the dog 127 and the limit switch 129, the indexing of each mold housing 83 can be detected.

Referring to FIGS. 2 and 4, the mold loading/unloading device 85 is located inside the aforementioned guide rails 111, 113. The mold loading/unloading device 85 transfers the split lower mold 9D and the split upper mold 11D stored in the mold storage body 83 at a position corresponding to the loading/unloading entrance 61 of the frame 57 in the mold changing device 17 to the bending machine. 1, or the divided lower mold 9D and the divided upper mold 11D provided in the bending machine 1.
This serves to carry the mold into the mold storage body 83. Note that the mold loading/unloading device 85 does not constitute the main point of this embodiment, so a more detailed explanation will be omitted.

As can be understood from the description of the embodiments described above, in short, the present invention provides annular guide rails 111 and 113 comprising a straight line portion and an arcuate portion, and allows the user to freely move along the guide rails 111 and 113. A plurality of first link members 103A, 10
The guide rails 111, 1 are installed near both ends of 5A.
An inner roller 109 in contact with the inner peripheral surface of 13 and an outer roller 115 in contact with the outer peripheral surface are rotatably provided,
A separate second link member having no inner and outer rollers 109, 115 between each of the first link members 103A, 105A having the inner roller 109 and outer roller 115.
The link members 103B, 105B are arranged and provided, and the first and second link members 103A,
105A, 103B, 105B are pivotally connected to each other to form an annular shape, and a mold storage body 83 is provided on at least one of the first and second link members, and the inner and outer rollers 109, 115 are connected to each other. The guide rail 111 when each first link member 103A, 105A provided passes through the straight portion and the arcuate portion of the guide rail 111, 113,
The inner roller 1 is arranged so that the distance between the inner roller 113 and the inner and outer rollers 109, 115 is always kept almost constant.
09 is smaller than the distance between the axes of the outer roller 115, and each of the first link members 103
It is attached near both ends of A, 105A.

Therefore, according to the present invention, even when the link member is located on a straight portion or an arcuate portion of the guide rail, there is no possibility that large play will occur between the inner and outer rollers and the guide rail. The link member can move smoothly along the guide rail. Furthermore, since the play is small, the generation of noise and vibration is also extremely small.

Note that the present invention is not limited to the above-described embodiments, but can be implemented in other embodiments by making appropriate changes.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the positional relationship between the bending machine and the mold changing device, Fig. 2 is an enlarged cross-sectional view taken along the - line in Fig. 1, and Fig. 3 is a side cross-section of Fig. 2. 4 are detailed enlarged views of the main parts of FIG. 2. 103, 105... Link member, 109... Inner roller, 111, 113... Guide rail, 11
5...Outer roller.

Claims (1)

[Claims] 1. Annular guide rails 111, 113 each having a straight portion and an arcuate portion are provided, and the guides are provided near both ends of a plurality of first link members 103A, 105A that are movable along the guide rails 111, 113. An inner roller 109 in contact with the inner peripheral surfaces of the rails 111 and 113 and an outer roller 115 in contact with the outer peripheral surfaces are rotatably provided, and the inner roller 10
Inner and outer rollers 10 are provided between the first link members 103A and 105A having outer rollers 115 and 9.
Separate second link member 10 without 9,115
3B, 105B are arranged and provided, and each of the first and second link members 103A, 105A, 1
03B and 105B are pivotally connected to each other to form an annular shape, and at least one of the first and second link members is provided with a mold storage body 83,
Each first roller is provided with the inner and outer rollers 109, 115.
The distance between the guide rails 111, 113 and the inner and outer rollers 109, 115 is always maintained substantially constant when the link members 103A, 105A pass through the straight portions and arcuate portions of the guide rails 111, 113. A support device for a mold storage body, characterized in that the distance between the axes of the inner roller 109 is smaller than the distance between the axes of the outer roller 115, and the inner roller 109 is attached near both ends of each of the first link members 103A, 105A. .