JPH078384B2 - Stretcher chuck device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a stretcher for gripping both ends of a profile and applying tension in order to correct bending, warping, twisting, etc. of the profile after extrusion molding. The present invention relates to a chuck device for a stretcher that holds and fixes one end of a shape member.

Prior Art A long profile formed by extrusion molding (hereinafter, simply,
(To be referred to as a shape member), in order to correct bending, warping, twisting, etc. that occur during molding and to ensure quality accuracy as a product, tension is applied in the longitudinal direction. A stretcher of the type that grips and pulls the part is used.

In this stretcher, a chuck device that grips one end of a profile and a stretcher device that grips and pulls the other end make a pair to apply tension to the profile, and the profile is supported from below. It is arranged below the table. However, the chuck device of the stretcher is movable below the table, and can cope with a profile having any length. Further, the conventional chuck device grips the profile by vertically gripping it with an immovable upper gripping member projecting upward from the profile and a movable lower gripping member rising while pushing up the profile from below. Therefore, the lower surface of the profile is
The table is grasped in a state of being levitated from the upper surface level of the table.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Therefore, according to such a conventional technique, when the chuck device of the stretcher grips the shape member, the shape of the shaper does not depend on the vertical thickness of the shape member (hereinafter, simply referred to as thickness). Since it was necessary to push up the upper surface of the material until it abuts the upper gripping member, the flying distance from the table top surface level becomes too large for a profile material with a small thickness, and bending, warping or twisting due to its own weight occurs in the middle part. However, there was an unavoidable problem that such things tend to occur. In order to prevent these problems, for example, the height position of the upper gripping member is changed using sensors such as limit switches and photoelectric switches, and the gripping height is controlled according to the thickness of the profile. There is also a way to do it,
This is because it is very difficult to achieve accurate control because the entire device is complicated and the profile to be detected is often deformed, and the direction and degree are irregular. Is.

Therefore, in view of the situation of the prior art, an object of the present invention is to mechanically interlock the descending motion of the upper gripping member and the ascending motion of the lower gripping member when gripping the profile, thereby achieving the whole structure. Provided is a stretcher chuck device having a simple structure and capable of preventing an inadvertent deformation of a shape member due to an inappropriate grip height of the shape member even if the thickness of the shape member changes. To do.

Means for Solving the Problems A structure of the present invention for achieving the above object is to provide a bogie that can travel forward and backward, a rear end of which is rotatably supported by the bogie, and a front end of which can swing up and down. Possible body frame, positioning member that is attached to the front end of this body frame and regulates the height position of the body frame, and is mounted on a dolly and can move up and down to support the front end of the body frame through the positioning member A support member, an upper grip member and a lower grip member mounted on the support frame, and when the positioning member is driven upward, the front end portion of the main body frame descends and at the same time, the lower grip member rises and the upper grip member is grasped. The gist is to hold the profile between the member.

In addition, a swingable hook for anchoring this is attached to the carriage, and this hook releases the anchor when lowering the support member while lowering the main body frame, while driving the positioning member upward. In this case, the anchoring mechanism interlocking with the positioning member can prevent the anchoring from being released.

Further, the upper grip member may be divided into left and right parts and retracted downward.

Therefore, in this structure, the positioning member is attached to the front end of the vertically movable body frame,
Further, since the support member mounted on the trolley supports the front end portion of the main body frame via this positioning member, the positioning member is driven upward with respect to the main body frame,
The height position with respect to the support member does not change, and on the contrary, the front end of the main body frame descends relative to the positioning member and the support member.

On the other hand, since the upper gripping member is mounted on the main body frame, the upper gripping member also descends as the main body frame descends. Further, since the lower grip member ascends when the positioning member relatively rises with respect to the main body frame,
The profile is sandwiched and gripped between the descending upper gripping member and the ascending lower gripping member, and the gripping height of the profile is substantially constant regardless of the thickness of the profile. Can be kept.

Further, if a hook is attached to the carriage and an offsetting mechanism that interlocks with the positioning member is attached to this hook, the offsetting mechanism will be activated when the positioning member is driven upward to lower the body frame in order to grip the profile. The tether can be operated to maintain the tether, while the tether is released and the troll can be moved when the support member is lowered to lower the main body frame. In any case, the anchorage of the carriage can be maintained or released automatically mechanically in conjunction with the lowering of the main body frame.

Furthermore, if the upper gripping member is divided and retracted downward, the height of the entire device can be made extremely small, so that the upper gripping member can be easily installed below the table and is extremely free from the system design. is there.

It operates as described above.

Example Hereinafter, an example will be described with reference to the drawings.

The chuck device of the stretcher includes a carriage 10, a main body frame 20, an upper clamp 30 having an upper grip member 31, a lower clamp 40 having a lower grip member 41, a lifter 50 having a positioning member 51, and a support member 60. Equipped with (Fig. 1),
It is arranged below the tables T, T ... For supporting the profile W. However, it is assumed that the stretcher of the stretcher that forms a pair with the chuck device and grips and pulls the other end of the profile W is disposed in front of the chuck device (direction of arrow K1 in the figure).

The trolley 10 includes left and right side frames 11 and 11, which are long in the front and rear,
.. for connecting these lower parts, and rollers 13, 13, ..
(FIG. 2, FIG. 2) and rollers 13, 13, ... Can be moved forward and backward on a pair of rails R, R by a drive mechanism (not shown).

On the outside of the left and right side frames 11, 11, hooks 14, 14 for anchoring the truck 10 to the rails R, R are fixed to a shaft 14a swingably supported by the side frames 11, 11.
The locking portions 14b, 14b at the lower end can engage with the hook blocks Rb, Rb ... By engaging the hooks 14, 14 with the hook blocks Rb, Rb ..., the carriage 10 can be anchored and fixed at positions corresponding to the hook blocks Rb, Rb. Further, front bearing portions 11a, 11a and rear bearing portions 11b, 11b are formed on the front and rear sides of the side frames 11, 11 so as to project upward.

The body frame 20 is a prismatic member 21 mounted on the carriage 10,
Front and rear brackets 22 and 22 and rear brackets 23 and 23, which are erected on the left and right, are provided on the upper surfaces of the front and rear ends thereof (FIGS. 1 and 4). The rear end portion of the main body frame 20 is swingably supported by the carriage 10 via a shaft 11c that passes through the rear brackets 23, 23 and the left and right rear bearing portions 11b, 11b of the carriage 10 in common. ing. Therefore, the front end of the main body frame 20 can swing up and down about the shaft 11c.

On the upper surface near the front end of the body frame 20,
Is installed (FIGS. 1 and 3). Upper clamp 30
Is provided with a pair of upper gripping members 31, 31 that open and close to the left and right, and the base end portions of the upper gripping members 31, 31 are fixed to the pair of shafts 33, 33. The shafts 33, 33 have two gears 33 that mesh with each other.
a and 33a are fitted together, a pinion 33b is further fitted to one shaft 33, and is meshed with a rack 34a attached to a rod of the cylinder 34. The shafts 33, 33 are rotatably supported by bearings 35, 36 fixed to the upper surface of the main body frame 20 (Fig. 1).

On each of the end faces of the upper gripping members 31, 31, there are protrusions 31 that engage with each other.
A and a recess 31b are formed (FIG. 3). Cylinder 34
Drive the rack 34a in the direction of arrow K2 in the figure through
The upper gripping members 31, 31 that have been opened left and right and retracted downward are
In the directions of arrows K3 and K4 in the figure, respectively, the shafts 33 and 33 are rotated in an arc shape around the shafts, and the convex portions 31a and the concave portions 31b are engaged with each other, and are integrated above the main body frame 20. It can be closed (two-dot chain line in Fig. 2). However, the upper grip member
31 and 31 are sufficiently lower than the tables T, T ... when they are opened left and right, and can be retracted downward, and when they are closed upward,
It is assumed that it is possible to project high above the tables T, T ... And surround the profile W on the tables T, T ... From the outside.

The lifter 50 is attached to the front end of the body frame 20 (FIGS. 1 and 4). The lifter 50 includes a pair of positioning members 51, 51, arms 52, 52, and a shaft 53 as main constituent members. Axis 53 is the front bracket 2 of the body frame 20
It is rotatably supported via 2 and 22. However, the front brackets 22, 22 support the shaft 53 between the under brackets 22a, 22a fixed to the upper surface of the prismatic member 21 and the cover brackets 22b, 22b attached to the under brackets 22a, 22a (FIG. 4). ). Arms 52, 52, whose tip ends are directed obliquely downward, are fixed to both left and right ends of the shaft 53.

The positioning members 51, 51 are rollers that are axially attached to the respective tip ends of the arms 52, 52, and correspond to the pedestals 62a, 62a of the support member 60. The positioning members 51, 51 are shafts
When 53 is rotated in the direction of arrow K5 in the figure, it can rise with respect to the shaft 53, but at this time, since its height position is maintained at a constant height by the support member 60, relatively,
The front end of the body frame 20 is adapted to descend.

The lower clamp 50 is a link member 42 fixed to the middle portion of the shaft 53.
And another link member 43 that is parallel to the link member 42, and a lower grip member 41 that is rotatably attached to the respective tip ends of the link members 42 and 43. The base end of the link member 43 is fixed to a shaft 43a parallel to the shaft 53, the shaft 43a,
Similar to the shaft 53, it is rotatably supported by the under brackets 22a, 22a and the cover brackets 22b, 22b.

The lower gripping member 41 is arranged above the main body frame 20 so as to be positioned inside the upper gripping members 31, 31 in a frame-shaped closed state (FIG. 2). The lower gripping member 41 forms a parallelogram with the link members 42 and 43 and the front brackets 22 and 22, and when the shaft 53 is rotationally driven in the direction of arrow K5 in FIG.
Through the link members 42 and 43, it is possible to ascend toward the upper gripping members 31 and 31 while maintaining a substantially horizontal posture.

The shaft 53 includes swing arms 54, 54 fixed to both left and right ends,
It is connected to a pair of cylinders 56, 56 via a rod 55 connected to each swing arm 54 (Figs. 1 and 2). The base end of each cylinder 56 is connected to the body frame 20 via the bracket 24.

The support member 60 includes a shaft 61 and a pair of support arms 62, 62 fixed to both ends of the shaft 61 (Fig. 4). A pedestal 62a having a smooth upper surface is formed at the tip of each support arm 62, and each positioning member 51 is supported from below.
The shaft 61 is rotatably supported by the front bearing portions 11a, 11a of the truck 10, and via arms 63, 63 fixed to the shaft 61,
The cylinders 64, 64 are connected to the rods 64a, 64a (Fig. 1). However, in the figure, only one of the arms 63, 63 and the cylinders 64, 64 is shown. Each cylinder 64 is swingably supported by a holder 12a attached to the connecting member 12 of the carriage 10.

The upper surfaces of the pedestals 62a, 62a of the support member 60 serve as reference surfaces that determine the support height of the front end portion of the main body frame 20. The height position of this reference plane can be changed up and down by expanding and contracting the rod 64a of each cylinder 64, and with this vertical movement, the main body frame 20 does not drive the positioning member 51, The front end portion can be rocked up and down.

A canceling mechanism 70 is combined with the hooks 14, 14 that hold the cart 10 in place. The offset mechanism 70 has three links.
71, 72, 73 and a push plate 74 are provided. Links 71 and 72
Is fixed to a shaft 71a that is rotatably supported by a bracket 25 on the main body frame 20, and the tip of the link 71 is
It is connected to the middle part of the rod 55. The tip portion of the link 72 is connected to the tip portion of the push plate 74 via the link 73, and the push plate 74 is swingable around the pin 74a at the rear end. Further, a pressing portion 74b is formed on the lower portion of the pressing plate 74, and is in contact with the tip portion 14c of the one hook 14.

The operation of the chuck device of the stretcher is as follows.

First, the upper gripping members 31, 31 are opened left and right and retracted downward, and the cylinders 64, 64 are shortened, and the arms 63, 63
When the support arms 62, 62 are swung downward via 61 (FIG. 5), the front end of the body frame 20 is swung downward about the shaft 11c. As a result, the push plate 74 also descends at the same time to release the engagement of the hooks 14, 14 with the hook blocks Rb, Rb located at the same position on the left and right. At this time, since the maximum height of the main body frame 20 is sufficiently lower than that of the tables T, T, ..., The chuck device as a whole moves back and forth on the rails R, R via the carriage 10 to form a shape. It is possible to stop at a predetermined position according to the length of the material W. After that, when the cylinders 64, 64 are extended and the support arms 62, 62 are returned to their original positions, the front end of the main body frame 20 rises and the hooks 14, 14 are engaged with predetermined hook blocks Rb, Rb. Dolly 10
Can be moored.

Next, the profile W is loaded onto the tables T, T ...
The gripped portion at the tip of is stopped at a position directly above the lower gripping member 41. When the upper gripping members 31, 31 that have been retracted downward by the cylinder 34 are closed above the lower gripping member 41 (FIG. 2),
Since the profile W on the tables T, T ... Is surrounded by the upper gripping members 31, 31, even if two or more profile W, W ... Can be done (two-dot chain line in the figure).

Further, when the rods 55, 55 are shortened by the cylinders 56, 56 and the positioning members 51, 51 are driven upward (sixth position).
(Figure), for the support member 60 supporting this from below,
The height positions of the positioning members 51, 51 do not change, and the front end portion of the main body frame 20 relatively descends, whereby
The upper grip members 31, 31 move down. At the same time, the lower grip member 41
Is raised toward the upper gripping members 31, 31 as the link member 42 rotates so as to stand upright with the shaft 53.
The profile W can be gripped between the upper gripping members 31, 31. Here, the upper gripping members 31, 31 are lowered, and the lower gripping member 41
Lifts and grips the profile W, so that the flying distances H1, H2 of the profile W from the upper surface level of the tables T, T ... It can be suppressed (solid line and two-dot chain line in FIG. 6). In addition, this levitation distance H1,
The H2 can be set to an optimum one by adjusting the lengths of the arms 52, 52 and the link member 42, the mounting angles of the two with respect to the shaft 53, and the like.

Further, at this time, the link members 42, 43 supporting the lower gripping member 41 are inclined rearward with respect to the base end portions of the link members 42 and 43, so that the profile W is indicated by an arrow K6 in FIG. When pulled in the direction, it acts to increase the gripping force on the profile W.

While the shape member W is being gripped, the canceling mechanism 70 operates, so that the engagement between each hook 14 and the hook block Rb cannot be released (FIG. 7). That is, even if the cylinders 56, 56 are shortened and the front end of the body frame 20 is lowered, the link 7
The push plate 74 connected to the rod 55 via 1, 72, 73 rises while rotating around the pin 74a, and this rise offsets the fall of the main body frame 20. , 14 will not be disengaged.

In addition, as long as the shape member W can be effectively gripped between the upper gripping members 31 and 31 and the lower gripping member 41, one or two or more arbitrary shapes can be simultaneously processed.

Other Embodiments Of the link members 42 and 43 for driving the lower grip member 41, the link member 43 is merely for maintaining the posture of the lower grip member 41 substantially horizontal, and therefore this is omitted. You can also do it. Further, since the link member 42 and the arms 52, 52 are all fixed to the shaft 53, it goes without saying that these members may be integrally formed.

Further, it is also possible to use the inner surface or the outer surface of the upper gripping members 31, 31 closed upward to form a guide for the vertical movement of the lower gripping member 41 or the link member 42. By smoothing the movement of the lower gripping member 41 and restraining the upper gripping members 31, 31 from the outside, it is possible to prevent accidental opening of the profile W while gripping it.

Furthermore, the upper grip members 31, 31 do not necessarily have to be retracted downward. When the upper gripping members 31, 31 are fixed so as to project further above the upper surface level of the tables T, T ..., the range of movement of the entire chuck device by the carriage 10 is limited to only between the two tables T, T. However, when the variation range of the length of the profile W to be processed is small, this can be sufficiently dealt with. However, at this time, instead of forming a frame shape closed by the pair of upper gripping members 31, 31,
It is advisable to use only one upper gripping member 31 to facilitate the loading and unloading of the profile W.

As described above, according to the present invention, the upper gripping member that descends together with the main body frame, the positioning member that regulates the height position of the main body frame, and the lower gripping member that rises together with the positioning member with respect to the main body frame. By combining with members and mechanically interlocking them, when gripping a shape member, it is possible to lower the upper gripping member and raise the lower gripping member. On the other hand, the possibility of inadvertent deformation can be minimized, and since no sensor is used, the overall structure is simple and the operation reliability is extremely high.

[Brief description of drawings]

1 to 7 show an embodiment, FIG. 1 is an explanatory view of the overall configuration, FIG. 2 is an explanatory view taken along arrow X of FIG. 1, FIG. 3 is an exploded perspective view of essential parts, and FIG. FIG. 5 is a perspective view of a main part, and FIGS. 5 to 7 are operation explanatory views. W …… Shape 10 …… Bogie 14 …… Hook 20 …… Main body frame 31 …… Upper gripping member 41 …… Lower gripping member 51 …… Positioning member 60 …… Supporting member 70 …… Offset mechanism

Claims (3)

[Claims] 1. A trolley which can be moved forward and backward, a rear end of which is rotatably supported by the trolley, and a front end of which can be vertically swung, and a main frame which is attached to the front end of the main frame. A positioning member that regulates the height position of the main body frame; a vertically movable support member that is mounted on the carriage and supports the front end of the main body frame through the positioning member; and a mounting member that is mounted on the main body frame. When the positioning member is driven upward, the front grip portion of the main body frame is lowered and at the same time, the lower gripping member is raised to move between the upper gripping member and the upper gripping member. A chuck device for a stretcher, which is characterized by gripping a shape member. 2. A swingable hook for anchoring the carriage is attached to the carriage, and the hook releases the anchor when lowering the support member when lowering the body frame. The chuck device for a stretcher according to claim 1, wherein when the positioning member is driven upward, the anchoring mechanism that is interlocked with the positioning member does not release the anchoring. 3. The chuck device for a stretcher according to claim 1 or 2, wherein the upper gripping member is divided into right and left parts and retracts downward.