Injection molding machine

Abstract

To provide a technique for routing a linear member in a space above a rotary table in an injection molding machine equipped with a safety guard that restricts entry from a molded product removal area to a mold clamping area.SOLUTION: A mold clamping device 100 of an injection molding machine 10 includes: an upper platen 110; a rotary table 114 to which a plurality of lower molds 820 are attached; a linear member 170 having one end fixed to the rotary table 114; and a safety guard 128 that restricts entry from a molded product removal area A2 to a mold clamping area A1. The linear member 170 has one end fixed to the rotary table 114 and is routed upward from there, and the safety guard 128 includes a movable guard 130 that rotates together with the rotary table 114 and a fixed guard 140 that is fixed to a frame 900. The fixed guard 140 is disposed at a position offset from a rotation center 140c of the rotary table 114 toward the mold clamping area A1 or the molded product removal area A2.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to an injection molding machine.

Background Art

[0002] Patent Document 1 discloses an injection molding machine in which a plurality of mold devices are mounted on a rotary table, and each of the plurality of mold devices is sequentially arranged in a mold clamping area and a molded product take-out area by the intermittent rotation of the rotary table. According to this injection molding machine, it is possible to simultaneously perform mold clamping of the mold device in the mold clamping area, injection of the molding material into the mold device, and taking out of the molded product in the molded product take-out area, and the molding cycle can be shortened.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In an injection molding machine as described in Patent Document 1, in order to be able to perform taking out of the molded product etc. during mold clamping while ensuring safety, a safety guard is provided to restrict entry from the molded product take-out area where taking out of the molded product etc. is performed to the mold clamping area where mold clamping is performed. However, when a safety guard is provided, if a linear member such as wiring or piping with one end fixed to the rotary table is routed in the upper space of the rotary table, the linear member will interfere with the safety guard every time the rotary table rotates intermittently. On the other hand, if the linear member is routed in the lower space of the rotary table, it becomes difficult to arrange complex devices under the rotary table.

[0005] The present invention has been made in such circumstances, and an exemplary object of one aspect thereof is to provide a technique capable of routing a linear member in the upper space of a rotary table in an injection molding machine provided with a safety guard that restricts entry from the molded product take-out area to the mold clamping area.

Means for Solving the Problems

[0006] In order to solve the above problems, an injection molding machine according to an aspect of the present invention is an injection molding machine including a mold clamping device, the mold clamping device including an upper platen to which an upper mold is attached, a rotary table to which a plurality of lower molds are attached, a lower platen that rotatably supports the rotary table from below, a linear member having one end fixed to the rotary table, and a safety guard that restricts entry from the molded product take-out area to the mold clamping area. The linear member has one end fixed to the rotary table and is routed upward therefrom, and the safety guard includes a movable guard attached to the upper surface of the rotary table and rotating together with the rotary table, and a fixed guard provided above the movable guard and fixed to the frame. The fixed guard is disposed at a position offset toward the mold clamping area side or the molded product take-out area side with respect to the rotation center of the rotary table.

[0007] Any combination of the above components, or those obtained by mutually substituting the components and expressions of the present invention among methods, devices, systems, etc., are also effective as aspects of the present invention.

Advantages of the Invention

[0008] According to the present invention, it is possible to provide a technique capable of routing a linear member in the upper space of a rotary table in an injection molding machine provided with a safety guard that restricts entry from the molded product take-out area to the mold clamping area.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0010] Hereinafter, the same or equivalent components, members, and steps shown in each drawing are denoted by the same reference numerals, and redundant explanations are omitted as appropriate. Also, the dimensions of the members in each drawing are shown enlarged or reduced as appropriate for easy understanding. Also, a part of the members that are not important for explaining the embodiments in each drawing is omitted from the display.

[0011] Refer to FIGS. 1 to 4. In FIGS. 2 and 3, the display of the four panels 101 to 104 is omitted. Also, in FIGS. 1 to 3, the display of the upper mold 810 and the lower mold 820 is omitted. Also, in FIG. 4, the display of the injection device 200 is omitted.

[0012] FIGS. 1, 2, and 4 show a state where the rotation stop position of the rotary table 114 is the first rotation stop position, and FIG. 3 shows a state where the rotation stop position of the rotary table 114 is the second rotation stop position. The first rotation stop position is a rotation stop position where the first mounting portion 115_1 is located at the mold clamping position P1 and the second mounting portion 115_2 is located at the molded product take-out position P2. In other words, the first rotation stop position is a position where the lower mold 820 mounted on the first mounting portion 115_1 faces the upper mold 810. The second rotation stop position is a rotation stop position rotated 180° from the first rotation stop position, and is a rotation stop position where the second mounting portion 115_2 is located at the mold clamping position P1 and the first mounting portion 115_1 is located at the molded product take-out position P2. In other words, the second rotation stop position is a position where the lower mold 820 mounted on the second mounting portion 115_2 faces the upper mold 810.

[0013] The following description is based on the XYZ orthogonal coordinate system. For convenience, the X-axis direction corresponds to the horizontal front-back direction, the Y-axis direction corresponds to the horizontal left-right direction, and the Z-axis direction corresponds to the vertical up-down direction. In the X-axis direction, the side indicated by the arrow is referred to as the front side or the near side, and the opposite side is referred to as the back side or the far side. In the Y-axis direction, the side indicated by the arrow is referred to as the right side, and the opposite side is referred to as the left side. In the Z-axis direction, the side indicated by the arrow is referred to as the upper side, and the opposite side is referred to as the lower side. The X-axis direction coincides with the direction in which the mold clamping area A1 and the molded product removal area A2 face each other. Also, the X-axis direction coincides with the direction in which the mounting portion 115 located in the molded product removal area A2, and thus the lower mold 820, and the mounting portion 115 located in the mold clamping area A1, and thus the lower mold 820, face each other.

[0014] The injection molding machine 10 includes a mold clamping device 100, an injection device 200, an ejector device 300, and a frame 900.

[0015] The mold clamping device 100 performs mold closing, mold clamping, and mold opening of the mold device 800. The mold clamping device 100 has a mold clamping direction that is the vertical direction, and includes an upper platen 110, a rotary table 114 provided at a distance below the upper platen 110, a lower platen 120 that rotatably supports the rotary table 114 from below, four panels 101 to 104 that surround the upper platen 110, the rotary table 114, and the lower platen 120, a safety guard 128 provided in an area surrounded by the four panels 101 to 104, an intrusion detection unit 160 that detects the intrusion of an object into the area, and a linear member 170 having one end fixed to the rotary table 114. Note that the mold clamping device 100 may be a horizontal type in which the mold clamping direction is the horizontal direction.

[0016] The upper platen 110 is driven by a drive unit (not shown) and moves up and down with respect to the rotary table 114 and thus the frame 900. The upper mold 810 is attached to the opposing surface (lower surface) of the upper platen 110 with respect to the rotary table 114.

[0017] The lower platen 120 is fixed to the frame 900. A rotary table 114 is rotatably supported on the opposing surface (upper surface) 120a of the lower platen 120 that faces the upper platen 110 in the vertical direction.

[0018] The rotary table 114 has a first mounting portion 115_1 and a second mounting portion 115_2 (collectively referred to as "mounting portion 115" when not particularly distinguished or grouped) on its upper surface 114a. The two mounting portions 115 are provided on opposite sides of each other by 180° with respect to the rotation center 140c of the rotary table 114. A lower mold 820 is attached to each of the first mounting portion 115_1 and the second mounting portion 115_2. The mold device 800 is composed of an upper mold 810 and a lower mold 820.

[0019] By intermittently rotating the rotary table 114 by 180° alternately clockwise and counterclockwise by a rotation motor (not shown), the two lower molds 820 alternately move to the mold clamping position P1 and the molded product removal position P2. When one of the two lower molds 820 is located at the mold clamping position P1, the other lower mold 820 is located at the molded product removal position P2.

[0020] The mold clamping position P1 is the position where the mold device 800 is clamped. The molded product removal position P2 is the position where the molded product is removed from the lower mold 820.

[0021] By raising and lowering the upper platen 110 with respect to the rotary table 114, mold closing, mold clamping, and mold opening of the mold device 800 are performed.

[0022] The front panel 101, the rear panel 102, the left side panel 103, and the right side panel 104 are fixed to the frame 900. The side panels 103, 104 each have doors 103a, 104a. The user can open the doors 103a, 104a to perform maintenance on the mold device 800. When the doors 103a, 104a are opened, the lowering of the upper platen 110 is mechanically locked.

[0023] The front panel 101 is provided with an opening 101a. The user can access the lower mold 820 located at the molded product take-out position P2 through the opening 101a to set an insert material in the lower mold 820 or take out the molded product from the lower mold 820.

[0024] The opening 101a has no door installed and is always open. This is because it is cumbersome to open and close the opening 101a every time an insert material is set in the lower mold 820 or the molded product is taken out from the lower mold 820, and it also causes the molding cycle to become longer.

[0025] The safety guard 128 divides the area surrounded by the four panels 101 to 104 into a clamping area A1 having a clamping position P1 and a molded product take-out area A2 having a molded product take-out position P2. The safety guard 128 restricts an object such as a worker's hand that has entered the molded product take-out area A2 from the opening 101a from further entering the clamping area A1 from the molded product take-out area A2.

[0026] The intrusion detection unit 160 detects the intrusion of an object such as a worker's hand into the molded product take-out area A2. In the illustrated example, the intrusion detection unit 160 is a light curtain and includes a light projection unit 161 and a light reception unit 162. When at least a part of a plurality of parallel light rays emitted from the light projection unit 161 does not reach the light reception unit 162, the intrusion detection unit 160 detects that there is an object blocking the light rays between the light projection unit 161 and the light reception unit 162, that is, an object has entered the molded product take-out area A2.

[0027] As described above, the opening 101a is always open, so that the worker can enter the molded product removal area A2 even while the mold clamping unit 100 is performing an operation that is dangerous to the worker. Therefore, if the intrusion detection unit 160 detects the intrusion of an object, the mold clamping unit 100 does not perform the dangerous operation. In detail, if the intrusion detection unit 160 detects the intrusion of an object while the mold clamping unit 100 is performing a dangerous operation, the mold clamping unit 100 stops the dangerous operation. Furthermore, even if the timing to perform the dangerous operation arrives, the mold clamping unit 100 does not start the dangerous operation while the intrusion detection unit 160 detects the intrusion of an object.

[0028] On the other hand, even if the intrusion detection unit 160 detects the intrusion of an object, if the operation is not dangerous to the worker, the mold clamping apparatus 100 executes the operation. In detail, if the intrusion detection unit 160 detects the intrusion of an object while the mold clamping apparatus 100 is executing an operation that is not dangerous, the control device 700 causes the mold clamping apparatus 100 to continue executing the operation without stopping it. Also, when the timing to execute an operation that is not dangerous arrives, the mold clamping apparatus 100 starts the operation even while the intrusion detection unit 160 is detecting the intrusion of an object.

[0029] For example, a dangerous action is the rotation of the turntable 114. This is because if a hand or the like is placed in the molded product removal area A2 while the turntable 114 is rotating, there is a risk that the hand will be pinched between a member that rotates together with the turntable 114 and a member that does not rotate together with the turntable 114. Therefore, if the intrusion detection unit 160 detects the intrusion of an object while the turntable 114 is rotating, the mold clamping unit 100 stops the rotation of the turntable 114. Furthermore, even if the timing to rotate the turntable 114 arrives, the mold clamping unit 100 does not start rotating the turntable 114 while the intrusion detection unit 160 is detecting the intrusion of an object.

[0030] For example, a dangerous operation is the lowering of the rod of the ejector device 300 protruding into the cavity space of the lower mold 820, which will be described later. This is because if a hand or the like is placed in the molded product take-out area A2 during the lowering of the rod, there is a risk of being pinched between the ejector plate that descends with the rod and the lower mold 820. Therefore, when the intrusion detection unit 160 detects the intrusion of an object during the lowering of the rod, the mold clamping device 100 stops the lowering of the rod. Also, even when the timing to lower the rod arrives, the mold clamping device 100 does not start lowering the rod while the intrusion detection unit 160 detects the intrusion of an object.

[0031] Since the intrusion from the molded product take-out area A2 to the mold clamping area A1 is restricted by the safety guard 128, the operations of the mold clamping device 100 performed in the mold clamping area A1, such as mold clamping, mold closing, and mold opening, do not correspond to dangerous operations in the present embodiment.

[0032] The linear member 170 is wiring and piping. The number of linear members 170 is not particularly limited. One end of the linear member 170 is connected (i.e., fixed) to a connector 164 fixed to the upper surface 114a of the rotary table 114 on the front side of the safety guard 128. That is, one end of the linear member 170 is fixed to the rotary table 114 via the connector 164 on the front side of the safety guard 128. Therefore, one end side of the linear member 170 rotates with the rotary table 114. Specifically, one end side of the linear member 170 moves back and forth between the left back side (see FIG. 2) and the right back side (see FIG. 3) of the molded product take-out area A2. The other end side of the linear member 170 is fixed to a non-movable member in the molded product take-out area A2. The non-movable member is a member that does not rotate with the rotary table 114 and does not move up and down with the upper platen 110.

[0033] The wiring is, for example, a high-voltage wire for supplying power to a heater that heats the lower mold 820, or a low-voltage wire for transmitting an electrical signal from a thermocouple that measures the temperature of the lower mold 820.

[0034] The pipes are, for example, a supply pipe that supplies a heat medium (refrigerant or heat medium) such as water for adjusting the temperature of the lower mold 820 into the lower mold 820, and a discharge pipe that discharges the heat medium from the inside of the lower mold 820 to the outside.

[0035] In addition, in FIGS. 1 to 4, the display of the linear member between the connector 164 and the lower mold 820 is omitted.

[0036] The injection device 200 is a vertical type in which the axial direction of a cylinder (not shown) is the vertical direction, and is disposed above the upper platen 110. Note that the injection device 200 may be a horizontal type in which the axial direction of the cylinder is the horizontal direction. Further, the mold clamping device 100 combined with the vertical injection device 200 may be either vertical or horizontal. Similarly, the mold clamping device 100 combined with the horizontal injection device 200 may be either horizontal or vertical.

[0037] The injection device 200 has a cylinder (not shown) provided with a nozzle at its tip. The injection device 200 is driven by a drive unit (not shown) and moves up and down with respect to the upper platen 110 and thus the mold device 800 disposed at the mold clamping position P1. The injection device 200 touches the nozzle against the mold device 800 disposed at the mold clamping position P1 by descending, and injects a molding material into the cavity space of the mold device 800. A molded product is obtained by solidifying the molding material filled in the cavity space. The number of cavity spaces is, for example, plural, and a plurality of molded products can be obtained simultaneously. The number of cavity spaces may also be one.

[0038] The ejector device 300 peels the molded product from the lower mold 820 disposed at the molded product take-out position P2. The ejector device 300 is not particularly limited, but in the present embodiment, the rod is raised and the rod is protruded into the cavity space of the lower mold 820 to peel the molded product from the lower mold 820.

[0039] The above is the basic configuration of the injection molding machine 10. Subsequently, its operation will be described.

[0040] Refer to FIG. 5. The process in FIG. 5 is repeatedly executed. The clamping device 100 rotates the rotary table 114 (S101). Note that the clamping device 100 rotates the rotary table 114 in the opposite direction to the previous process. That is, if it was rotated clockwise in the previous process, it is rotated counterclockwise in this process. Also, if it was rotated counterclockwise in the previous process, it is rotated clockwise in this process. Specifically, when the rotation stop position of the rotary table 114 is the first rotation stop position (the rotation stop positions in FIGS. 1, 2, and 4), the rotary table 114 is rotated 180° counterclockwise, and when the rotation stop position of the rotary table 114 is the second rotation stop position (the rotation stop position in FIG. 3), the rotary table 114 is rotated 180° clockwise. By rotating the rotary table 180°, the lower die 820 on which the molded product was located at the clamping position P1 and the lower die 820 located at the molded product take-out position P2 are exchanged.

[0041] The clamping device 100 sequentially executes die closing (S102), clamping (S103), filling of the molding material (S104), and die opening (S105).

[0042] The ejector device 300 protrudes a rod into the cavity space of the lower die 820 (S201). As a result, the molded product is peeled off from the lower die 820. The operator takes out the molded product from the lower die 820 (S301). The ejector device 300 lowers, that is, retracts the rod (S202). The operator sets the insert material in the lower die 820 (S302).

[0043] If an object's entry into the molded product take-out area A2 is detected during the rotation of the rotary table in S101, the rotation of the rotary table in S101 stops. Also, while an object's entry into the molded product take-out area A2 is detected, the rotation of the rotary table in S101 is not started.

[0044] If an object's intrusion into the molded product take-out area A2 is detected while the rod of S202 is being retracted, the retraction of the rod of S202 stops. Also, while an object's intrusion into the molded product take-out area A2 is detected, the retraction of the rod of S202 is not started. Note that even when the retraction of the rod is stopped or the like, the mold closing of S102, the mold clamping of S103, the filling of the molding material of S104, and the mold opening of S105 in the mold clamping area A1 are executed.

[0045] Subsequently, the safety guard 128 will be described in more detail.

[0046] Refer to FIGS. 1 to 4. The safety guard 128 includes two movable guards 130, two fixed guards 140, and a central guard 150. The two fixed guards 140 and the central guard 150 are held by a holding frame 129. The holding frame 129 is fixed to the side panels 103, 104. Therefore, the two fixed guards 140 and the central guard 150 are fixed to the side panels 103, 104 and thus to the frame 900 via the holding frame 129. Although not particularly limited, the guards 130, 140, 150 may be formed to be transparent or translucent. In this case, the state of the mold clamping area A1 can be visually recognized.

[0047] The central guard 150 is a V-shaped plate-like member in plan view. The central guard 150 is arranged such that the apex of the V is located in front of the rotation center 140c of the rotary table 114 in the front view, and both ends of the V are located on the rear side of the rotation center 140c of the rotary table 114. The central guard 150 is configured to avoid the upper platen 110.

[0048] The two fixed guards 140 are plate-like members and extend from both ends of the central guard 150 respectively. The fixed guards 140 are arranged such that the main surfaces face in the X-axis direction. Therefore, in plan view, the fixed guards 140 extend in the Y-axis direction.

[0049] The two fixed guards 140 are arranged on the rear side of the rotation center 140c of the rotary table 114. In other words, the two fixed guards 140 are arranged at a position offset to the rear side, i.e., the mold clamping area A1 side, with respect to the rotation center 140c of the rotary table 114.

[0050] More specifically, the two fixed guards 140 are arranged on the back side of a straight line L extending in the Y-axis direction passing through the rotation center 140c of the rotary table 114 in a plan view. In other words, the two fixed guards 140 are arranged at a position offset to the rear side, i.e., the mold clamping area A1 side, from the straight line L.

[0051] Note that the two fixed guards 140 are arranged at positions that do not interfere with the lifting of the upper platen 110, of course.

[0052] The fixed guard 140 is provided above the movable guard 130. The fixed guard 140 is formed so that the movable guard 130, the lower mold 820, and the molded product can pass under the fixed guard 140 when the rotary table 114 rotates.

[0053] The fixed guard 140 may include an upper guard 141 and a lower guard 142 as in the examples of FIGS. 2 and 3. The lower guard 142 is provided between the upper guard 141 and the movable guard 130 in the vertical direction. The lower guard 142 is fixed to a non-movable member. The non-movable member may be the upper guard 141. That is, the lower guard 142 may be fixed to the upper guard 141 as in the examples of FIGS. 2 and 3.

[0054] The lower guard 142 is removably fixed. "Removably fixed" means that the lower guard 142 is fixed so that the operation of fixing the lower guard 142 and the operation of releasing the fixing can be repeatedly executed. Alternatively, the lower guard 142 is fixed to the upper guard 141 with a hinge or the like. That is, the lower guard 142 is fixed to the upper guard 141 so as to be foldable (folded back). Alternatively, the lower guard 142 is fixed to the upper guard 141 so as to be slidable up and down.

[0055] Here, when attaching the upper mold 810 to the upper platen 110, the upper mold 810 and the lower mold 820 are placed at the molded product take-out position P2 in the molded product take-out area A2 using a crane or the like, the rotary table 114 is rotated to place them at the mold clamping position P1 in the mold clamping area A1, the upper platen 110 is lowered to bring the upper platen 110 into contact with the upper mold 810, and the upper mold 810 is fixed to the upper platen 110 with a fixture. Since the fixed guard 140 is not formed so that the upper mold 810 can pass under the fixed guard 140, if the fixed guard 140 remains as it is, the upper mold 810 will contact the fixed guard 140 when the rotary table 114 is rotated.

[0056] On the other hand, by removing the lower guard 142 or the like, it is possible to avoid the upper mold 810 from contacting the fixed guard 140.

[0057] A notch 140a for passing the sprue attached to the molded product is formed at the lower end of the fixed guard 140, and in the illustrated example, at the lower end of the lower guard 142.

[0058] Here, if the vertical distance D from the rotary table 114 to the fixed guard 140 is short, when the mold thickness of the mold device 800 is thick, the lower mold 820 with the molded product with a sprue cannot pass under the fixed guard 140. That is, a mold device 800 with a thick mold thickness cannot be used. Also, if the distance D is long, in other words, if the height of the movable guard 130 is high, even when using a mold device 800 with a thin mold thickness, it is necessary to raise the upper platen 110 relatively high according to the height of the movable guard 130 when the mold is opened so that the movable guard 130 can pass under the upper platen 110 and the upper mold 810. This hinders the shortening of the molding cycle.

[0059] On the other hand, since the fixed guard 140 has a notch 140a for passing the sprue, compared with the case where the notch 140a is not formed, even if the distance D is the same, a mold device 800 with a thicker mold thickness can be used. Alternatively, the distance D can be shortened while the mold thickness of the mold device 800 that can be used remains the same.

[0060] The two movable guards 130 are arranged so as to sandwich the rotation center 140c of the rotary table 114. The two movable guards 130 are fixed on the connector 164 fixed to the upper surface 114a of the rotary table 114. That is, the two movable guards 130 are fixed to the rotary table 114 via the connector 164. Therefore, the two movable guards 130 rotate together with the rotary table 114.

[0061] Each of the two movable guards 130 includes a first movable guard 131 that cooperates with the fixed guard 140 to restrict the intrusion of an object when the rotation stop position of the rotary table 114 is the first rotation stop position (the rotation stop positions in FIGS. 1, 2, and 4), and a second movable guard 132 that cooperates with the fixed guard 140 to restrict the intrusion of an object when the rotation stop position of the rotary table 114 is the second rotation stop position (the rotation stop position in FIG. 3).

[0062] The first movable guard 131 has a main body portion 131a. The main body portion 131a has a main surface facing in the X-axis direction when the rotation stop position of the rotary table 114 is the first rotation stop position, that is, extends in the Y-axis direction in a plan view.

[0063] The second movable guard 132 has a main body portion 132a. The main body portion 132a has a main surface facing in the X-axis direction when the rotation stop position of the rotary table 114 is the second rotation stop position, that is, has a main body portion 132a that extends in the Y-axis direction in a plan view.

[0064] Preferably, when the rotation stop position of the rotary table 114 is the first rotation stop position, the first movable guard 131 overlaps the fixed guard 140 in a plan view, and when the rotation stop position of the rotary table 114 is the second rotation stop position, the second movable guard 132 overlaps the fixed guard 140 in a plan view.

[0065] In any case, when the rotational stop position of the rotary table 114 is the first rotational stop position and the second rotational stop position, the gap between the movable guard 130 and the fixed guard 140 only needs to be large enough that an operator's finger cannot reach the dangerous part (e.g., directly below the upper platen 110) from that gap. For example, it is sufficient if the dimension of the gap and the distance from the gap to the upper platen 110 satisfy a predetermined safety standard.

[0066] When the rotational stop position of the rotary table 114 is the first rotational stop position or the second rotational stop position, one end of the linear member 170, i.e., the end fixed to the rotary table 114, is positioned offset to the back side or the front side with respect to the straight line L by an offset amount Q2 smaller than the offset amount Q1 of the fixed guard 140. Note that when the offset amount Q2 is smaller than the offset amount Q1, the case where the offset amount Q2 is 0 is also included. That is, the case where one end of the linear member 170 is positioned on the straight line L is also included.

[0067] Further, the linear member 170 is connected to the connector 164 between the first movable guard 131 and the second movable guard 132. In the illustrated example, there are a plurality of linear members 170, and the plurality of linear members 170 are connected to the connector 164 in one of the two movable guards 130. That is, the plurality of linear members 170 are fixed to the rotary table 114 on the same side with respect to the rotation center 140c of the rotary table 114.

[0068] The linear member 170 is routed upward from the connection portion with the connector 164. That is, the linear member 170 is not routed under the lower platen 120. This enables a complicated device to be arranged under the lower platen 120.

[0069] According to the embodiment described above, since the fixed guard 140 is disposed at a position offset with respect to the rotation center 140c of the rotary table 114, when the rotary table 114 is intermittently rotated alternately clockwise and counterclockwise between the first rotation stop position and the second rotation stop position, that is, when the rotary table 114 is intermittently rotated alternately by 180° clockwise and counterclockwise, it is possible to avoid the linear member 170 interfering with the fixed guard 140.

[0070] Further, according to the present embodiment, when the rotation stop position of the rotary table 114 is the first rotation stop position or the second rotation stop position, one end of the linear member 170 is located at a position offset to the back side or the front side with respect to the straight line L by an offset amount smaller than that of the fixed guard 140. In this case, it is possible to more reliably avoid the linear member 170 interfering with the fixed guard 140.

[0071] Further, according to the present embodiment, when there are a plurality of linear members 170, the plurality of linear members 170 are fixed to the rotary table 114 on the same side with respect to the rotation center 140c of the rotary table 114. Thereby, even when there are a plurality of linear members 170, it is possible to avoid interference with the fixed guard 140.

[0072] The present invention has been described based on the embodiments. It is understood by those skilled in the art that these embodiments are illustrative, and various modifications are possible for each of the constituent elements and combinations of each processing process, and such modifications are also within the scope of the present invention. Hereinafter, modifications will be described.

[0073] (Modification 1) In the embodiment, the case where the movable guard 130 includes the first movable guard 131 and the second movable guard 132 has been described. However, the movable guard 130 may be formed as a single block having a thickness in the X direction. That is, a single movable guard 130 may serve both as the first movable guard 131 and the second movable guard 132. In this case, the movable guard 130 is preferably formed so as to overlap the fixed guard 140 in plan view both when the rotation stop position of the rotary table 114 is the first rotation stop position and when it is the second rotation stop position. To achieve this, the thickness of the movable guard 130 in the X direction may be twice or more the offset amount Q1 of the fixed guard 140.

[0074] (Modification 2) The two fixed guards 140 may be arranged in front of the rotation center 140c of the rotary table 114. In other words, the two fixed guards 140 may be arranged at a position offset toward the front side, that is, the molded product take-out area A2 side, with respect to the rotation center 140c of the rotary table 114. More specifically, the two fixed guards 140 may be arranged on the front side of a straight line L extending in the Y-axis direction passing through the rotation center 140c of the rotary table 114 in plan view. In other words, the two fixed guards 140 may be arranged at a position offset toward the front side, that is, the molded product take-out area A2 side, from the straight line L. In this case, the linear member 170 may be routed so as not to be pinched between the upper mold 810 and the lower mold 820 or the like.

[0075] Any combination of the above-described embodiments and modifications is also useful as an embodiment of the present invention. The new embodiments produced by the combination have the effects of the respective embodiments and modifications being combined. It is also understood by those skilled in the art that the functions to be achieved by each constituent element described in the claims are realized by a single one of the constituent elements shown in the embodiments and modifications or by the cooperation thereof.

Explanation of Reference Numerals

[0076] 10 Injection molding machine, 100 type clamping device, 110 upper platen, 114 rotating table, 120 lower platen, 128 safety guard, 130 movable guard, 140 fixed guard, 170 linear member, A1 type clamping area, A2 molded product taking-out area.

Claims

1. An injection molding machine equipped with a mold clamping device, wherein the mold clamping device includes: an upper platen to which an upper mold is attached; a rotating table to which a plurality of lower molds are attached; a lower platen that rotatably supports the rotating table from below; a linear member having one end fixed to the rotating table; a safety guard that restricts entry from the molded product take-out area to the mold clamping area; and one end of the linear member is fixed to the rotating table and is routed upward therefrom, the safety guard includes a movable guard attached to the upper surface of the rotating table and rotating together with the rotating table, and a fixed guard provided above the movable guard and fixed to the frame, the fixed guard is disposed at a position offset toward the mold clamping area side or the molded product take-out area side with respect to the rotation center of the rotating table. An injection molding machine.

2. The injection molding machine according to claim 1, wherein, when the rotating table stops at the rotation stop position where the lower mold faces the upper mold, the one end of the linear member fixed to the rotating table is offset toward the back side or the front side with respect to the rotation center by an offset amount smaller than that of the fixed guard.

3. The injection molding machine according to claim 1, comprising a plurality of the linear members, wherein the plurality of linear members are fixed to the rotating table on the same side with respect to the rotation center.

4. The injection molding machine according to claim 1, wherein the fixed guard overlaps the movable guard in a plan view when the rotating table stops at the rotation stop position where the lower mold faces the upper mold.

5. The plurality of lower molds are two lower molds, a first movable guard that overlaps the fixed guard in a plan view when the rotating table stops at the rotation stop position where one of the two lower molds faces the upper mold, and a second movable guard that overlaps the fixed guard in a plan view when the rotating table stops at the rotation stop position where the other of the two lower molds faces the upper mold. The injection molding machine according to claim 1.

6. The injection molding machine according to claim 5, wherein the linear member is fixed to the rotating table between the first movable guard and the second movable guard.

7. The fixed guard includes an upper guard and a lower guard provided between the upper guard and the movable guard. The injection molding machine according to claim 1, wherein the lower guard is removable, foldable with respect to the upper guard, or fixed slidably with respect to the upper guard.

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