JPH0141545Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a temporary assembly tab bending device used for bending the ends of temporary assembly tabs used for shape retention during temporary assembly of various parts. Regarding.

[Conventional technology]

FIGS. 6 and 7 show a support grid for a nuclear reactor fuel assembly, which is one of the parts assembled using the above-mentioned temporary assembly tabs.

This support lattice 1 is made up of a large number of band-shaped inner straps 2 arranged in a lattice shape at predetermined intervals and surrounded by band-shaped outer straps 8 arranged in a rectangular shape. Fuel rods 4 inserted into the lattice space formed by ..., 3...
... and the guide tube 5..., respectively.
At both ends of the inner straps 2 of the support grid 1, two tongue-shaped tabs 6, 6 are formed, respectively, and at the outer straps 3, both ends of the inner straps 2 are formed. tab 6 formed in the
A large number of elongated slots 7, into which the slots 7 are inserted, are formed at corresponding positions. In the support grid 1, the tabs 6 of the inner strap 2 are connected to the slots 7 of the outer strap 3, respectively.
...is temporarily assembled by inserting it into the interior and bending its upper and lower ends slightly.

By the way, conventionally, when slightly bending the upper and lower ends of the tabs 6, the support grid 1 is placed on a table 9 and a support base 10, which are movably raised and lowered by a hydraulic cylinder 8, as shown in FIG. Pillar 11...
The tabs 6 of the support grid 1 are bent using tab bending pliers 13 after being sandwiched and fixed between the support grid 1 and the upper fixing plate 12 fixed via the support grid 1 . As shown in FIG. 9, the tab bending pliers 13 are provided at the positions of the upper and lower ends of the tabs 6 of the clamping part 14 that sandwiches the tabs 6, and protrude in the direction of bending these upper and lower ends. Part 1
5 and 15 are formed, and the upper and lower ends of the clamped tab 6 are pressed by the caulking parts 15 and 15 to bend them at a predetermined angle, respectively. Then, using the tab bending pliers 13, the tabs 6 of the support grid 1 are manually formed.
I was folding them one by one.

[Problem that the invention attempts to solve]

However, since the above-mentioned conventional bending work of the tabs 6 relies on manual labor, a large number of man-hours are required to bend all the tabs 6, and furthermore, due to fatigue of the worker over time, etc.
It is difficult to bend all the tabs 6 with uniform force, and as a result, a certain amount of rework is unavoidable, so the work is generally extremely inefficient. Moreover, if the amount of bending of the tabs 6 is excessive, there is a risk of deformation or distortion of the inner straps 2, while if the amount of bending of the tabs 6 is too small, it will not be possible to obtain sufficient temporary assembly strength. There is a problem in that it requires a high level of skill, and an improvement has been desired.

[Purpose of invention]

This idea was made in view of the above circumstances,
By mechanizing and automating the bending work of temporary assembly tabs, it is possible to bend all the temporary assembly tabs with uniform force and angle, improving the quality of the product and reducing the need for this type of work. It is an object of the present invention to provide a tab bending device for temporary assembly that can save labor.

[Structure of the idea]

The tab bending device for temporary assembly of this invention includes a movable table which is movably provided on the bed via a drive means, into which the component having the tab for temporary assembly is inserted, and a movable table which is disposed on one end side of the bed. a tab bending mechanism for bending a temporary assembly tab of the component on the movable table; and a tab bending mechanism for controlling the movement of the movable table to the tab bending mechanism to place the component in a fixed position on the tab bending mechanism. and a moving table drive control means,
The tab bending mechanism includes a fixed crimping jig in which a slit is formed into which the center portion of the tab is inserted, and the fixed crimping jig is provided on the end side of the tab so as to be movable in the direction of bending the tab. a movable caulking jig formed with a protrusion that abuts an end of the tab and bends the tab during movement;
The movable caulking jig is provided with a driving means for reciprocating the movable caulking jig in the bending direction of the tab.

〔Example〕

1 to 5 show an example of the tab bending device for temporary assembly of this invention.

In FIGS. 1 and 2, reference numeral 20 indicates a bed of this temporary assembly tab bending device, and a movable table 21 is provided on this bed 20. As shown in FIG.

This moving table 21 has a feed shaft 23 whose one end is connected to a stepping motor (drive means) 22.
The turntable 24 is mounted on the bed 20 so as to be able to move slightly on the bed 20.
is rotatably provided. The support grid 1 sandwiched between the upper plate 25a and the lower plate 25b is placed on the turntable 24, and the upper plate 25a is supplied with fixing air via a presser jig 26. A cylinder 27 is provided. This air cylinder 27 is connected to a rotating arm 28 that is erected on the side of the turntable 24 of the moving table 21.
The air cylinder 27 presses the support grid 1 downward and fixes it on the turntable 24. Further, a position sensor 29 is attached to the lower part of the movable base 21 for detecting the amount of movement of the movable base 21 with respect to the bed 20. A tab bending mechanism 30 is provided on one side of the moving table 21 in the moving direction.

The base of this tab bending mechanism 30 is the bed 2
Integral pillars 31 and 3 erected at both ends of 0
1 and an upper board 32 horizontally spanned between the upper ends of these supports 31, 31.
The height is approximately the same as the lower part of the support grid 1 above. A fixing caulking jig 33 is provided on the upper surface of the upper substrate 32.

This fixed crimping jig 33 is shown in FIGS. 3 and 4.
As shown in the figure, the plate surface 34 is
It is a plate-shaped member disposed opposite to the upper support grid 1, and is fixed to a bracket 35 attached to the upper surface of the upper substrate 32 via bolts 36, 36. A groove 37 having a predetermined width and having a U-shaped cross section is formed in the center of the plate surface 34 of the fixed crimping jig 33 in the horizontal direction. Small grooves 38, 38, which are narrower in width than the upper groove 37, are formed in the upper and lower portions of the groove 37 on the plate surface 34, respectively, at positions spaced apart from the groove 37 by a predetermined equal distance. As a result, band-shaped tab holding portions 39, 39 are formed in the upper and lower portions of the groove portion 37 on the plate surface 34 in the horizontal direction at positions sandwiched between the groove portion 37 and the small groove portions 38, 38. The positions of these band-shaped tab holding parts 39, 39 are set to have the same height as the tabs 6 which are arranged horizontally in two rows upward and downward on the opposing support grid 1 and protrude, and the vertical width thereof is The length is set to cover a predetermined length of the central portion of the 6. The above-mentioned tab holding parts 39, 39 are provided with the above-mentioned tab holding parts 3 at equal pitch intervals with the above-mentioned tabs 6 in the horizontal direction.
Slits 40 . . . which open in the vertical direction of 9 and 39 are formed.

In addition, the groove portion 37 of the fixed caulking jig 33 has
An internally movable caulking jig 41 is inserted so as to be movable in the horizontal direction. This internal movement caulking jig 41
is an elongated plate-like member having a thickness equal to the depth of the groove 37, and at its upper and lower ends protrudes vertically at equal pitch intervals from the tabs 6, respectively, and abuts against the upper and lower wall surfaces of the groove 37. Projections 42... are formed. Further, one end of this internally movable caulking jig 41 is attached to a rod 4 of a hydraulic cylinder (driving means) 43 fixed to the upper surface of the above-mentioned support column 31 on one side.
It is connected to 4. The protrusions 42 of the internally movable caulking jig 41 are formed with inclined portions 45 on the side toward which the hydraulic cylinder 43 advances, as shown in FIG. 5a. Here, the angle of inclination of the inclined portions 45 is made equal to the angle at which one end of the tab 6 inserted between the protrusions 42 is to be bent.

Also, the small groove portions 38, 3 of the fixed caulking jig 33
8, external movable caulking jigs 46, 46, respectively.
is inserted so that it can move freely in the horizontal direction. These external movable caulking jigs 46, 46 are connected to a support 3 that faces the support 31 to which the hydraulic cylinder 43 is fixed.
Hydraulic cylinder (driving means) fixed on the top surface of 1
It is integrally connected to the rod 48 of 47 via a connecting plate 49. The lower end of the external movable caulking jig 46 located above and the upper end of the external movable caulking jig 46 located below are provided with protrusions 42 of the upper internal movable caulking jig 41, respectively.
A protrusion 50 similar to the above is formed. Furthermore, sloped parts 51 as shown in FIG. 5 are formed in the same manner as the sloped parts 45 on the sides of the protrusions 50 on the advancing side by the hydraulic cylinders 47.

Moreover, the rod 4 of the hydraulic cylinders 43, 47
The tips of the rods 4 and 48 are provided with rods 44 and 48 that, when protruding, come into contact with the sides of the fixing crimping jig 33 at predetermined positions, respectively.
Stoppers 52 and 53 that stop the movement of 4 and 48
is fixed. Furthermore, the tab bending mechanism 30
A photoelectric element 54 is located below the bed 20 and detects the approach of the moving table 21 to the tab bending mechanism 30 and controls its speed in stages.
are arranged in three stages. The photoelectric element 54 and the position sensor 29 constitute a movable table drive control means 55.

Next, the operation of the tab bending device for temporary assembly having the above structure will be explained below. First, the stepping motor 22 is driven to move the movable table 21 on which the support grid 1 is attached toward the tab bending mechanism 30 side.
Then, the photoelectric elements 54 provided in three stages detect the approaching moving table 21 and reduce its speed in stages. The movable table 21 is finally moved to a fixed position where the tabs 6 protruding from one side thereof are inserted into the slits 40 of the tab holding parts 39, 39 provided in the fixed crimping jig 33 of the tab bending mechanism 30. be stopped at. Next, drive the hydraulic cylinders 43 and 47 of the tab bending mechanism 30,
The internal movable caulking jig 41 and the external movable caulking jig 46 are moved in directions opposite to each other as indicated by arrows in FIG. 5a. At this time, the hydraulic cylinder 4
By means of stoppers 52 and 53 at 3 and 47, the movement of the internally movable caulking jig 41 and the externally movable caulking jig 46 is stopped at positions where they have moved distances L1 and L2 in FIG. 5a, respectively. As a result, the tabs 6 whose central portions are held within the slits 40 are attached to the internal caulking jig 4.
1 and the protrusions 42, 50 of the external crimping jig 46, the upper and lower ends of each are bent in opposite directions, as shown in FIG. 5b. At this time, the upper and lower ends of the tabs 6 are all bent by a preset angle by the inclined parts 45 and 51 formed on the protrusions 42 and 50. In this way, when all the tabs 6 on one side of the support grid 1 have been bent, the internal movement crimping jig 41 is activated by the hydraulic cylinders 43 and 47.
The external movable caulking jig 46 is moved in the opposite direction, and the movable table 21 is also moved in the direction away from the tab bending mechanism 30. Next, the turntable 24 of the movable table 21 rotates 90 degrees, and the support grid 1
After facing the new surface of the tab bending mechanism 30,
It starts moving toward the tab bending mechanism 30 again. By repeating the above series of operations, the tabs 6 on all sides of the support grid 1 are successively bent.

According to such a tab bending device for temporary assembly, since the hydraulic cylinders 43 and 47 are used in the tab bending mechanism 30 to bend the upper and lower ends of the tabs 6, all the tabs 6 are always bent. Can be bent with uniform force. Moreover, tab 6 above...
The protrusions 42 and 50 of the internal and external movable caulking jigs 41 and 46 for bending have inclined portions 45 and 51, respectively.
, it can be bent at a constant angle, and there is no risk of bending too much or too little. In addition, since many tabs 6 can be bent at once, it is possible to save a lot of labor compared to the conventional method, and furthermore, it is possible to automate the work of folding the large number of tabs for temporary assembly. .

[Effect of idea]

As explained above, the temporary assembly tab bending device of this invention includes a movable table which is movably provided on the bed via a drive means, on which the component having the temporary assembly tab is attached, and one end of the bed. a tab bending mechanism that is disposed on the side of the unit and bends the temporary assembly tab of the component on the movable table; The tab bending mechanism includes a fixed crimping jig in which a slit is formed into which the central part of the tab is inserted, and a movable table drive control means for positioning the tab in the fixed crimping jig. A movable caulking jig, which is provided on the end side of the tab so as to be movable in the direction of bending the tab, and is formed with a protrusion that abuts the end of the tab and bends the tab when the jig is moved; and a driving means for reciprocating the tab in the bending direction. Therefore, according to this tab bending device for temporary assembly, all the tabs for temporary assembly can be bent with uniform force and angle. In addition, it is possible to save labor considerably compared to the conventional method, and furthermore, it is possible to automate the work of folding a large number of temporary assembly tabs.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the temporary assembly tab bending device of this invention. Figure 1 is a side view of the entire device, Figure 2 is a plan view of the same, and Figure 3 is a tab bending device for temporary assembly. A front view of the bending mechanism, FIG. 4 is a plan view thereof, FIGS. 5 a and b are enlarged views of section A in FIG. This shows a support grid for a nuclear reactor fuel assembly. Figure 6 is a schematic assembly diagram, Figure 7 is an enlarged view of a tab, and Figures 8 and 9 are for explaining conventional tab bending work. FIG. 8 is a schematic diagram of the support grid fixing jig, and FIG. 9 is a schematic diagram of the tab bending pliers. 1...Support grid, 6...Tab, 7...Slit, 20...Bed, 21...Movement base, 22...
Stepping motor (driving means), 30...Tab bending mechanism, 33...Fixed crimping jig, 39...Tab holding section, 40...Slit, 41...Internally movable crimping jig, 42, 50...Protrusion Department, 43, 47...
... Hydraulic cylinder (driving means), 45, 51 ... Inclined part, 46 ... External movable caulking jig, 52, 53
...Stopper, 54...Photoelectric element, 55...Moving table drive control means.

Claims (1)

[Claims for Utility Model Registration] The above-mentioned slot of a temporary assembly tab that is formed to protrude into one part in a flat plate shape and is inserted into a slot formed in the other part during temporary assembly to maintain the temporarily assembled shape. A temporary assembly tab bending device for bending an end of a portion protruding from the bed, the movable table being movably provided on the bed via a drive means and on which the component having the temporary assembly tab is mounted; a tab bending mechanism that is disposed on one end of the bed and bends a tab for temporary assembly of the component on the moving table; and a tab bending mechanism that controls the movement of the moving table to the tab bending mechanism to bend the tab of the component. The tab bending mechanism includes a movable table drive control means for positioning the mechanism at a fixed position, and the tab bending mechanism includes a fixed crimping jig in which a slit is formed into which the central part of the tab is inserted, and this fixed crimping jig. a movable caulking jig, which is provided on the end side of the tab so as to be movable in the direction of bending the tab, and is formed with a protrusion that abuts the end of the tab and bends the tab when the jig is moved; and the movable caulking jig. A tab bending device for temporary assembly, comprising a drive means for reciprocating the jig in the bending direction of the tab.