JP3203513B2 - Robot for injection molding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a robot for an injection molding machine for removing a molded product from an opened mold or loading an insert part into the opened mold.

[0002]

2. Description of the Related Art Conventionally, a molded product protruded by an ejector is attached to a molding machine main body of an injection molding machine, and the ejected molded product is taken out to a product stocker attached to the molding machine main body. There is a known molded product removal apparatus (robot for an injection molding machine).

[0003] Various types of this type of molded product take-out apparatus are known. For example, Japanese Patent Application Laid-Open No. 8-304245 discloses a molded product take-out apparatus called a traverse type. Normally, in the traverse type, a chuck for holding or releasing a molded product is moved straight in the X direction (longitudinal direction of the molding machine body), the Y direction, and the Z direction. It has a function of accommodating it in a product stocker attached to the side of the molding machine main body.

On the other hand, a molded product taking-out apparatus using an articulated robot arm having a plurality of arm portions connected thereto is also disclosed in, for example, Japanese Utility Model Publication No. 4-45861 and Japanese Utility Model Publication No. 5-40989. The traverse type mentioned above,
Since it is necessary to ensure the movement stroke of the chuck in each direction as it is, there are difficulties such as an increase in the size of the entire apparatus and the need for an installation space corresponding to the movement stroke. The former type is advantageous in terms of miniaturization, compactness and space saving because the moving range of the chuck portion is reduced.

[0005]

However, the above-mentioned conventional molded product removing apparatus has the following problems.

[0006] First, since the unloading direction of the molded product is perpendicular to the longitudinal direction of the molding machine main body (Y direction), the product stocker for accommodating the product is placed laterally of the molding machine main body. It is necessary to be attached to. Therefore, there is no space between the installed injection molding machines, which leads to a decrease in workability and a decrease in the retrievability of the product stocker.

Secondly, in particular, in a traverse type molded product take-out apparatus, a track rail having a length necessary for moving a chuck portion in a vertical direction (Z direction) and a horizontal direction (Y direction) is provided in a molding machine main body. The protrusions in the upward and lateral directions not only increase the space occupied by the entire injection molding machine, but also hinder the presence of the injection molding machine, resulting in a decrease in safety for workers and a further decrease in workability.

The present invention has solved the above-mentioned problems in the prior art, and secures a space between injection molding machines and eliminates an obstacle, thereby improving workability. It is an object of the present invention to provide a robot for an injection molding machine capable of improving the quality of a product stocker (part stocker) and improving the retrievability (installability) of the product stocker (component stocker) and improving the safety for workers.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a robot for an injection molding machine (molding) for taking out a molded product from an opened mold C or loading an insert part into the opened mold C. When configuring the product take-out device 1 or the insert component loading device), the track mechanism 2 that does not project outward beyond the longitudinal end Ms of the molding machine main body M is disposed above the molding machine main body M. A moving body 3 that moves along the track mechanism 2 and protrudes outward from the longitudinal end Ms when the track mechanism 2 moves to the end 2e of the track mechanism 2; In the projecting portion 3o of the moving body 3 projecting outward from the longitudinal end Ms,
Elevating mechanism units 5a, 5 for raising and lowering molded product holding units 6a, 6b for holding or releasing holding of molded products or insert parts
b is provided.

In this case, according to a preferred embodiment, the moving body section 3 includes displacement mechanism sections 11, 12a, 12b for displacing the lifting mechanism sections 5a, 5b in the longitudinal direction H of the molding machine main body M. The lifting mechanism includes a product-side lifting mechanism 5a that raises and lowers a product-side holding unit 6a that holds or releases the product part of the molded product, and a runner unit that is separated from the product part of the molded product. One or both of the runner-side elevating mechanism 5b that raises and lowers the runner-side holding part 6b to be operated. Further, the product-side elevating mechanism 5a includes a sub-elevating unit 13 for elevating and lowering the product-side holding unit 6a, and the sub-elevating unit 1
The runner-side elevating mechanism 5b includes a main elevating unit 15 that elevates and lowers the runner-side holding unit 6b, and a main elevating unit 16 that elevates and lowers the sub-elevating unit 15.

Accordingly, when the robot for an injection molding machine is used in the molded product take-out apparatus 1, the track mechanism 2 is located above the molding machine main body M and longer than the longitudinal end Ms of the molding machine main body M. It does not protrude outward and the track mechanism 2
Is moved along the track mechanism 2 and protrudes outward from the longitudinal end Ms only when the molded product is carried out to the product stocker (collection box). When the molding machine main body M is not operated, none of the parts of the molded product removal device 1 protrude outward from the longitudinal end Ms. Therefore, at the same time as the obstruction is eliminated, the product stocker (recovery box) can be provided alongside the longitudinal end Ms of the molding machine main body M, so that the spatial clearance between the injection molding machines is secured. Further, the product-side elevating mechanism 5a includes a sub-elevating unit 13 for elevating and lowering the product-side holding unit 6a, and a main elevating unit 14 for elevating and lowering the sub-elevating unit 13, and the runner-side elevating mechanism 5b includes a runner-side elevating mechanism 5b. Sub-elevating unit 1 that moves up and down the side holding unit 6b
5 and the main lifting / lowering unit 16 that raises / lowers this sub-elevating unit 15 ensures a spatial clearance above the molding machine main body M in addition to a spatial clearance between the injection molding machines.

[0012]

Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

First, a molded product removal apparatus 1 according to the present embodiment.
(Robot for Injection Molding Machine)
This will be described with reference to FIG.

M is a molding machine main body of the injection molding machine, which is provided with an injection device Mi on one upper surface of the molding machine bed 20 and a mold clamping device Mc on the other upper surface. The mold clamping device Mc includes a mold setting plate 21 and a cylinder support plate 22 which are separately installed on the upper surface of the molding machine bed 20.
Four tie bars 23 are installed horizontally between the cylinder support plate 1 and the cylinder support plate 22, and the mold clamping plates 24 are slidably supported by the tie bars 23. And the mold setting plate 2
1, a fixed mold Cc is attached, a movable mold Cm is attached to the mold clamping plate 24, and a fixed mold Cc and a movable mold Cm are further attached.
The intermediate mold Ci is supported between the rods via rods 25. Further, a mold clamping cylinder 26 is attached to the cylinder support plate 22, and the tip of a piston rod 26 r protruding from the mold clamping cylinder 26 is connected to the mold clamping plate 24. In addition, fixed type C
The mold C is constituted by c, the movable mold Cm, and the intermediate mold Ci. The imaginary line 27 is a molding machine cover.

On the other hand, the molding machine body M has
Is attached. As shown in FIG. 2, the molded product take-out device 1 includes a track mechanism 2, and the track mechanism 2 is formed as a housing 3 that is elongated along the longitudinal direction H of the molding machine main body M.
One. As shown in FIGS. 3 and 4, the housing part 31 is formed in a channel shape having an open upper surface, and the bottom surface of the housing part 31 is provided on the upper surface of the mold placing plate 21 via the leg part 32 and the leg part 33. Are attached to the upper surface of the cylinder support board 22 through the respective members. At this time, take care that the housing portion 31 (the track mechanism portion 2) does not protrude outward from the longitudinal end portion Ms of the molding machine main body M, that is, the molding machine cover 27 or the molding machine bed 20 shown in FIG. I do.

Further, a ball screw mechanism 34 is provided at the center of the inside of the housing 31. Ball screw mechanism 3
4 is provided with a ball screw portion 35 along the longitudinal direction of the housing portion 31, and one end of the ball screw portion 35 is
6 and rotatably supported, and the other end of the ball screw portion 35 is coupled to a rotary shaft of a rotary drive portion 37 using a servomotor. A nut portion 38 is screwed into the ball screw portion 35, and the bottom surface of the movable body portion 3 is connected to the upper end of the nut portion 38. At this time, the movable body 3 is formed to be elongated along the longitudinal direction of the housing 31 and the end of the movable body 3 located on the opposite side to the longitudinal end Ms side is connected to the nut 38. Note that the movable body 3 projects outward from the longitudinal end Ms when the movable body 3 moves to the end 2 e of the track mechanism 2. Further, as shown in FIG. 4, the bottom lower surface of the movable body portion 3 is movably supported via a pair of linear bearings 39 disposed on the bottom upper surface of the housing portion 31 located on both sides of the ball screw portion 35. .

The movable body 3 includes a product-side elevating mechanism 5a that raises and lowers a product-side holding portion 6a that holds or releases a product portion of a molded product, and a runner portion that is separated from the product portion of the molded product. The runner-side elevating mechanism 5b that raises and lowers the runner-side holding portion 6b to be held or released is supported. At this time, the product-side elevating mechanism 5a and the runner-side elevating mechanism 5b are disposed at the protruding portion 3o of the moving body 3 protruding outward from the longitudinal end Ms. That is,
The product-side elevating mechanism 5a is fixed to an end position on the side of the longitudinal end Ms on the side surface 3s of the moving body 3, and the runner-side elevating mechanism 5b is a product-side elevating mechanism 5a.
And is arranged so as to be movable in the longitudinal direction H of the molding machine main body M along the side surface 3 s of the moving body portion 3. In this case, as shown in FIG. 6, a pair of upper and lower linear bearings 42 is interposed between the base 41 of the runner-side elevating mechanism 5b and the side surface 3s of the moving body 3, and the moving body 3 is provided with an air cylinder 43. Is fixed, and the movable rod 43r of the air cylinder 43 and the runner-side elevating mechanism 5b are connected by the connecting body 44. Thereby, the displacement mechanism 11 for displacing the runner-side elevating mechanism 5b in the longitudinal direction H of the molding machine main body M.
Is configured.

Further, as shown in FIG. 5, the product-side elevating mechanism 5a is a sub-elevating unit 13 for elevating and lowering the product-side holding unit 6a.
And a main elevating unit 14 for elevating the sub-elevating unit 13. In this case, the product-side holding unit 6a is provided with a suction unit 51 that suctions by suction negative pressure and an suction unit 5 by an air cylinder 52.
1 has a conversion part 53 for changing the direction by 90 °. The sub-elevating unit 13 uses a rodless air cylinder 54, and the product-side holding unit 6 a is attached to the movable unit 55 of the rodless air cylinder 54. The main elevating section 14 is constituted by a ball screw mechanism section 56 in which a ball screw section is rotated by a rotation drive section using a servomotor. A movable section 57 provided integrally with a nut section of the ball screw mechanism section 56 has a rodless air. The upper end of the cylinder 54 is attached, and the lower end of the ball screw mechanism 56 is attached to the side surface 3 s of the moving body 3.

On the other hand, the runner-side elevating mechanism 5b includes a sub-elevating unit 15 for elevating the runner-side holding unit 6b and a main elevating unit 16 for elevating the sub-elevating unit 15. in this case,
The runner-side holding portion 6b is a chuck portion 6 that is mechanically held.
One. The sub-elevating unit 15 uses an air cylinder 62 that moves the chuck unit 61 up and down.
The chuck portion 61 is attached to the tip of the movable rod 62r. The air cylinder 62 is supported by an L-shaped support portion 63, and a guide rod 64 fixed to the chuck portion 61 is guided by a guide hole provided in the support portion 63. The main lift 16 is a rodless air cylinder 65.
The upper end of the support part 63 is attached to the movable part 66 of the rodless air cylinder 65, and the lower part of the rodless air cylinder 65 is attached to the base 41.

Next, the operation of the molded article removing apparatus 1 according to the present embodiment will be described with reference to the flowchart shown in FIG.

First, after completion of molding, the mold clamping device Mc opens the mold C with the mold clamping cylinder 26 (step S1). As a result, the fixed type Cc, the intermediate type Ci, and the movable type Cm are opened at intervals as shown in FIGS. 1 and 2, respectively. At this time, the molded product removal device 1
Is stopped at the start end position Ps indicated by a solid line in FIGS. 1 and 2, and the product side elevating mechanism 5a and the runner side elevating mechanism 5b are moved to the ascending positions shown in FIGS. 5 and 6, respectively. is there. The product-side holding portion 6a is located at an intermediate position between the intermediate die Ci and the movable die Cm in the longitudinal direction H, and the runner-side holding portion 6b is located at an intermediate position between the intermediate die Ci and the fixed die C in the longitudinal direction H.
c. Further, the runner-side elevating mechanism 5b is at a retracted position separated from the product-side elevating mechanism 5a by the air cylinder 43.

By opening the mold, a sequence controller (not shown) displaces the movable portion 66 of the rodless air cylinder 65 and the movable rod 62r of the air cylinder 62 provided in the runner-side elevating mechanism 5b downward, and lowers the chuck portion 61. (Step S2). And the chuck part 61
Reaches the lowered position indicated by the solid line in FIG. 1, the chuck 61 is driven and controlled to grip (hold) the runner portion of the molded product (step S3). The molded product includes a product part and a runner part. The product part and the runner part are automatically separated (cut) by a mold opening operation, and the product part is separated from the intermediate mold Ci and the movable mold by an ejector (not shown). Cm, the runner part is attached to the fixed type Cc and the intermediate type C
It remains between i and the fixed type Cc. On the other hand, when the chuck portion 61 grips the runner portion, the rotation driving portion 37 of the track mechanism portion 2 is drive-controlled to move the moving body portion 3 slightly forward to the right in FIG. Completely (Step S4). Next, the rodless air cylinder 6
5 movable part 66 and movable rod 62 of air cylinder 62
r is displaced upward to raise the chuck portion 61 (step S5).

The movable portion 57 of the ball screw mechanism 56
And the movable part 55 of the rodless air cylinder 54 is displaced downward, and the suction part 51 is lowered (step S6).
When the suction unit 51 reaches the lowered position, the drive unit 37 of the track mechanism unit 2 is drive-controlled, and the suction unit 51 is slightly moved forward to suck (hold) the product unit (steps S7 and S8). ). When the product part is sucked, the rotation drive part 37 is drive-controlled to slightly move the suction part 51 backward. (Step S9). Further, the ball screw mechanism 5
The movable part 57 of No. 6 and the movable part 55 of the rodless air cylinder 54 are displaced upward to raise the suction part 51 (step S10).

In the embodiment, in order to facilitate understanding,
The case where the product-side elevating mechanism 5a and the runner-side elevating mechanism 5b are individually operated is shown. However, the product-side elevating mechanism 5a and the runner-side elevating mechanism 5b are operated by the air cylinder 43 and the track mechanism 2. May be performed simultaneously by combining.

Next, the drive of the rotation drive unit 37 of the track mechanism unit 2 is controlled to move the moving unit 3 to the end position Pe indicated by the phantom line in FIG. 1 (steps S11 and S12). As a result, the projecting portion 3o of the moving body 3 projects from the terminal end 2e of the track mechanism 2, that is, outwardly from the longitudinal end Ms of the molding machine main body M. Then, in this state, the air cylinder 43 is driven to displace the runner-side elevating mechanism 5b to a retracted position away from the product-side elevating mechanism 5a, and to position it above the collection box 91 (step S13). Thereafter, the drive of the runner-side elevating mechanism 5b is controlled to lower the chuck 61, and when the chuck 61 is lowered to a predetermined position, the drive of the chuck 61 is controlled to release the runner (step S).
14, S15). Therefore, the holding of the runner part is released,
The runner part is accommodated in a collection box 91 installed below. Then, the chuck unit 61 is raised, and when the chuck unit 61 reaches the raised position, the air cylinder 43 is drive-controlled to displace the chuck unit 61 to the forward position (steps S16 and S16).
17).

The driving of the air cylinder 52 of the conversion unit 53 is performed to change the suction unit 51 from the forward position shown by the solid line in FIG. 1 to the downward position shown by the imaginary line in FIG. Is driven to lower the suction section 51 (steps S18, S19). Then, when the suction unit 51 has moved down to the predetermined position, the drive of the suction unit 51 is controlled to release the product unit (step S20). Therefore, the holding of the product part is released, and the product part is stored in the product stocker 92 installed below. At this time, the product side elevating mechanism 5a
Are sequentially changed by controlling the rotation driving unit 37, the products can be stored in the product stocker 92 at regular intervals. Thereafter, the suction unit 51 is raised, and when the suction unit 51 reaches the ascending position, the conversion unit 53 returns the suction unit 51 from the downward position indicated by the virtual line in FIG. 1 to the forward position indicated by the solid line (steps S21 and S22). .

The operation of the product holding section 6a and the operation of the runner elevating mechanism 5b proceed simultaneously. Then, the drive of the rotation drive unit 37 of the track mechanism unit 2 is controlled and the moving unit 3 is moved backward to return to the start position Ps indicated by the solid line in FIG. 1 (steps S23 and S24). Hereinafter, the same operation is repeated for each molding cycle.

As described above, according to the molded product take-out apparatus 1 according to the present embodiment, since the track mechanism 2 does not protrude outward from the longitudinal end Ms of the molding machine main body M, the track mechanism 2 itself. Does not protrude outward from the molding machine main body M in the horizontal direction. On the other hand, the moving body 3 provided in the track mechanism 2
Moves along the track mechanism 2 and projects outward from the longitudinal end Ms only when the molded product is carried out to the product stocker 92 and the collection box 91. Therefore, for example, the molding machine main body M is operated. If not, none of the parts of the molded product removal device 1 will protrude outward from the longitudinal end Ms. Therefore, the product stocker 92 and the collection box 91 can be provided alongside the longitudinal end Ms of the molding machine main body M at the same time as the obstruction is eliminated, so that the space between the injection molding machines is secured. . As a result, it is possible to improve the workability, and further to improve the recoverability of the product stocker 92 and the collection box 91, and to improve the safety for the worker.

The product-side elevating mechanism 5a includes a sub-elevator 13 for elevating and lowering the product-side holding part 6a.
Since the main lift unit 14 is configured to move the runner-side lifting mechanism unit 5b up and down and the main lift unit 16 that moves the sub-lift unit 15 up and down, In addition to the spatial clearance between the injection molding machines M, the spatial clearance above the molding machine body M is ensured, and a large space saving of the entire injection molding machine can be realized.

The embodiment has been described in detail above.
The present invention is not limited to such an embodiment,
The detailed configuration, shape, material, method, and the like can be arbitrarily changed, added, or deleted without departing from the gist of the present invention.

For example, in the embodiment shown in FIGS. 1 to 7, the product side elevating mechanism 5a is fixed to the moving body 3, and the runner side elevating mechanism 5b is displaced by the air cylinder 43 (displacement mechanism 11). And the track mechanism 2
Although the ball screw mechanism 34 is provided on the moving body 3, the runner-side elevating mechanism 5b may be fixed to the moving body 3 and the product-side elevating mechanism 5a may be disposed so as to be displaceable.

As shown in FIG. 8, the product-side elevating mechanism 5
a and the runner-side elevating mechanism 5b may be configured to be displaceable. FIG. 8 shows that a linear motor 7 is
1 and displaceable mechanism parts 12a and 12b capable of independently displacing the product-side elevating mechanism part 5a and the runner-side elevating mechanism part 5b in the longitudinal direction H of the molding machine main body M. As a configuration for independently displacing the product-side elevating mechanism 5a and the runner-side elevating mechanism 5b, a servo motor that independently displaces the product-side elevating mechanism 5a and the runner-side elevating mechanism 5b is used. A pair of used ball screw mechanisms may be provided, or a transport belt or the like may be used.

On the other hand, in the case of the configuration as shown in FIG. 8, the moving body 3 on the track mechanism 2 only has to reciprocate from the start position Ps to the end position Pe. Therefore, the track mechanism 2
A rodless air cylinder 72 shown in FIG. 9 may be used in place of the ball screw mechanism 34 provided in FIG. In the figure, 7
Reference numeral 3 denotes a movable portion of the rodless air cylinder 72, and the movable portion 73 is attached to the bottom surface of the movable body portion 3. FIG.
9 and FIG. 9, the same portions as those in FIGS. 1 to 6 are denoted by the same reference numerals, and the configuration is clarified. On the other hand, as for the configuration of the track mechanism 2 and the moving body 3, the track mechanism 2 is configured by a simple guide rail,
May be configured as a self-propelled type having a built-in travel drive unit.

As described above, the moving means can adopt any structure. In particular, when accurate position control is required, a driving mechanism using a servomotor or the like may be formed, and the moving means may be moved to a preset position. When it is sufficient to simply reciprocate, a driving mechanism using an air cylinder (rodless air cylinder) or the like may be configured. Also, the overall operation may be realized by combining these operations.

Further, although the molded product taking out apparatus 1 for taking out a molded product from the opened mold C as a robot for an injection molding machine has been exemplified, the same applies to an insert component loading apparatus for loading an insert component into the opened mold. Can be used. In this case, a component stocker is installed in place of the product stocker 92, and an insert component contained in the component stocker is taken out by the robot for an injection molding machine (insert component loading device) according to the present invention, and is then placed in a mold. Can be loaded.

[0036]

As described above, in the robot for an injection molding machine according to the present invention, a track mechanism that does not protrude outside the longitudinal end of the molding machine main body is disposed above the molding machine main body. A moving body that moves along the track mechanism, and protrudes outward from a longitudinal end when the track mechanism moves to an end thereof; In the projecting part of the moving body part projecting outward from
Because it has a lifting mechanism that raises and lowers the molded product holding part that holds or releases the molded product or insert part,
It has the following remarkable effects.

[0037] Spacious room between the injection molding machines can be ensured, so that the operability can be greatly improved and the retrievability (installability) of the product stocker (part stocker) can be improved, and the safety for the worker can be improved. Can be achieved.

According to a preferred embodiment, the product-side elevating mechanism comprises a sub-elevating unit for elevating and lowering the product-side holding unit, and a main elevating unit for elevating the sub-elevating unit.
If the runner-side elevating mechanism is configured to include a sub-elevating unit that elevates and lowers the runner-side holding unit and a main elevating unit that elevates and lowers the sub-elevating unit, in addition to ensuring the spatial clearance between the injection molding machines, In addition, since a space above the molding machine main body can be secured, a large space saving of the entire injection molding machine can be realized.

[Brief description of the drawings]

FIG. 1 is a side view of a molded product taking out apparatus (injection molding machine robot) according to a preferred embodiment of the present invention;

FIG. 2 is a plan view of the molded product removal device,

FIG. 3 is a cross-sectional side view of a track mechanism in the molded product unloading device.

FIG. 4 is a cross-sectional front view of a track mechanism in the molded product take-out apparatus;

FIG. 5 is a partial cross-sectional front view including a product-side elevating mechanism in the molded product take-out apparatus;

FIG. 6 is a partial cross-sectional front view including a runner-side elevating mechanism in the molded product take-out apparatus;

FIG. 7 is a flowchart for explaining the operation of the molded article removal device in order.

FIG. 8 is a plan view showing a modified example of the displacement mechanism in the molded product take-out apparatus;

FIG. 9 is a cross-sectional side view showing a modified example of the track mechanism in the molded product take-out apparatus.

[Explanation of symbols]

 Reference Signs List 1 molded article removal device (robot for injection molding machine) 2 track mechanism section 2e end of track mechanism section 3 moving body section 3o projecting portion of moving body section 5a elevating mechanism section 5b elevating mechanism section 6a molded article holding section 6b molded article holding section Unit 11 Displacement mechanism unit 12a Displacement mechanism unit 12b Displacement mechanism unit 13 Sub-elevation unit 14 Main elevating unit 15 Sub-elevation unit 16 Main elevating unit C Mold M Molding machine main body Ms Longitudinal end of molding machine main body H Molding machine main body Longitudinal direction

Continued on the front page (72) Inventor Masayuki Sunahara 2110 Nanjo, Najo, Hanashi-gun, Nagano Prefecture Nissei Jushi Kogyo Co., Ltd. (56) References JP-A-9-201849 (JP, A) JP-A-4-265719 (JP, A) JP-A-61-171318 (JP, A) JP-A-6-166065 (JP, A) JP-A-63-247017 (JP, A) JP-A-63-132012 (JP, A) JP-A-8-300425 (JP, A) JP-A-6-12021 (JP, U) JP-A-3-109820 (JP, U) JP-A 5-40989 (JP, U) JP-A 4-45861 (JP, U) JP-A 60-184616 (JP, U) (58) Fields surveyed (Int. Cl. ⁷⁾ , DB name) B29C 45/00-45/84

Claims (6)

(57) [Claims] 1. A robot for an injection molding machine for taking out a molded product from an opened mold or loading an insert part into the opened mold, in a longitudinal direction of the molding machine main body above the molding machine main body. A track mechanism that does not protrude outward from the end is provided, and when the track mechanism moves along the track mechanism and moves to the end of the track mechanism, the longitudinal end A moving body portion that protrudes outward from the vertical direction, and a lifting portion that raises and lowers a holding portion that holds or releases the molded product or the insert part at a projecting portion of the moving body portion that protrudes outward from the longitudinal end. A robot for an injection molding machine, comprising a mechanism. 2. The robot for an injection molding machine according to claim 1, wherein the moving body includes a displacement mechanism for displacing the elevating mechanism in a longitudinal direction of the molding machine main body. 3. The injection molding machine according to claim 1, wherein the lifting mechanism is a product-side lifting mechanism that lifts and lowers a product-side holding unit that holds or releases a product part of the molded product. For robots. 4. The injection molding apparatus according to claim 3, wherein the product-side elevating mechanism includes a sub-elevating unit that elevates the product-side holding unit and a main elevating unit that elevates the sub-elevating unit. Machine robot. 5. A runner-side elevating mechanism that lifts and lowers a runner-side holding part that holds or releases a runner part separated from a product part in the molded product. The robot for an injection molding machine as described in the above. 6. The injection molding apparatus according to claim 5, wherein said runner-side elevating mechanism comprises a sub-elevating unit for elevating and lowering said runner-side holding unit, and a main elevating unit for elevating said sub-elevating unit. Machine robot.