JPH023440Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a gripping device for an automatic paper punching machine.

In general, automatic punching machines clamp paperboard with a clamping spring on a clamping base, feed it to the punching device through a chain fixed to the clamping base, punch out the paperboard, transport it to a separating device, and then This is used to separate the forming part from the scrap part, but since a large tension is applied to this holding table when the paperboard is transported, it must be ensured that it does not become deformed due to distortion or the like.

For this reason, conventional bite rests are made of rigid, thick-walled, elongated iron plates. (Refer to Utility Model Publication No. 43-14627) However, since this grip is heavy, it is not possible to start, move, and stop the grip quickly. Furthermore, since inertia is generated during operation, it becomes difficult to stop the bite base quickly. In particular, high-speed operation, for example, 100 punches per minute.
In the case of ~150 times, the inertia also increases, making it even more difficult to stop the biting stand quickly.

Therefore, the automatic punching machine is currently operating at low speed.

Therefore, since it takes time to carry the paperboard into and out of a predetermined position of the automatic punching machine and the separating device, the automatic punching machine cannot be operated efficiently. Therefore, by thinning the wall thickness of the iron plate of the bite base to reduce its weight, the bite base will start, move, and stop more quickly, but on the other hand, the rigidity will be reduced, so the middle part of the bite base will become lighter. There is a risk that the lower part of the intermediate part may come into contact with an iron plate or the like.

Further, since the fixed end of the bite spring formed in a mountain shape is screwed to one end of the bite base, stress is concentrated on the screwed portion, making the bite spring susceptible to fatigue failure. Therefore, the life of the gripping device is shortened.

Further, since the tip of the bite spring is inclined with respect to the spring base, the paperboard is pressed by the tip of the bite spring and comes into surface contact.

Therefore, since the pressing force of the gripping spring is not very strong, the gripping position may shift during conveyance, and the paperboard may not be set accurately at the set position.

This idea was developed in view of the above circumstances, starting the bite table,
The purpose is to move and stop quickly. Another purpose is to increase the life of the bite spring device and to ensure accurate conveyance of the paperboard to a set position.

This device fixes the base end of a bite spring to one end of a flat bite base, provides a protruding spring base with a protruding hole at the other end of the bite base, and attaches a conveyor chain to the bite base. In an automatic punching machine, the fixed end of the clamping spring is fixed with a screw via a clamp, and the clamping base is made of aluminum or the like having a reinforcing part and a hollow part along its longitudinal direction. The bite spring is integrally formed of a lightweight material, the length of the bite base in the advancing direction is larger than the length between the front and back surfaces of the bite base, and the free end of the bite spring is formed into an arc shape. The above object is achieved by covering the projection hole and forming the tip of the free end vertically so as to press it against the spring base.

Hereinafter, an embodiment of the present invention will be explained with reference to the accompanying drawings. 1 is a substantially flat bite base made of a lightweight material such as aluminum, aluminum alloy, carbon fiber, etc., and has a reinforcing member inside. Two hollow parts 3 and 4 partitioned by 2 are provided in the longitudinal direction.

Reference numerals 5, 6, and 7 are thick parts of the bite base, and the thick part 7 is provided with a screw groove 8, and an auxiliary member 2 is provided between the thick part 6 and the bottom part 1c of the bite base 1. Reinforce the bite stand 1.

Length H of the prop 1 in the advancing direction (for example, H=70
mm) is the length B of the front surface 1a and back surface 1b of the bite base 1
(For example, B=16 mm).
Reference numeral 9 denotes a tapered part for relief, and a spring base 11 having a protruding hole 10 is fixed to the upper part of the tapered part 9 so as to protrude from the grip base 1. Reference numeral 12 denotes a bite spring formed of a disk-shaped leaf spring, the base end of which is fixed to the bite base 1 with a screw 14 via a wide clamp 13, and the tip of the free end formed vertically. The portion 12a is pressed against the tip of the spring base 11.

One set of the spring base 11 and one set of the bite springs 12 are provided at both ends of the bite base 1 in the longitudinal direction, but the number may be increased as appropriate depending on the size and weight of the paperboard. In the figure, reference numeral 15 denotes a conveyance chain provided perpendicular to the longitudinal direction of the bite table 1, which is rotated by a drive device (not shown).
5 are fixed to both ends of the support base 1 in the longitudinal direction.

Next, to explain the operation of this embodiment, a spring pressing rod (not shown) passes through the projection hole 10 and passes through the arrow A1.
When pushed up in the 0 direction, it hits the bite spring 12, and when the press bar is further raised in the same direction against the reaction force of the bite spring 12, the bite spring 12 becomes the state shown by the chain line 12A, and the spring base 11 and the tip 12a of the bite spring. When the paperboard 16 is supplied into this gap from the direction of arrow A15 and the pressing force of the spring press bar is released, the bite spring 12 tries to return to its original state due to the force of the spring, so the paperboard 16
is sandwiched and pressed between the spring base 11 and the tip end 12a of the bite spring 12.

At this time, since the tip portion 12a is vertical, it makes line contact with the paperboard 16 while sinking into the surface of the paperboard 16.

Next, when the conveyor chain 15 is rotated by a drive device (not shown) and operated in the direction of arrow A15,
The holding table 1 also moves in the same direction at the same time and conveys the paperboard 16 to a punching device (not shown).

Since a large tension is generated in the holder 1 during conveyance of the paperboard 16, it is difficult to deform the holder 1, but since the holder 1 is configured as described above, the tension is dispersed.
It will not be significantly deformed.

After this punching is completed, the paperboard in the bitten state is fed to a separating device (not shown) in the same manner as described above, and after separating the molded part and the scrap part, the bitten paperboard is
Push up to release the paperboard 16, and release the bite spring 12.
is brought into pressure contact with the spring plate 11.

The gripping device for an automatic punching machine according to the present invention has the following remarkable effects.

(1) The rest is integrally formed of a lightweight material such as aluminum and has a reinforcing part and a hollow part along its longitudinal direction, and the length of the rest in the direction of movement is the length of the rest. Since it is formed to be larger than the length between the front and back surfaces, sufficient rigidity of the support is ensured, and its weight is also extremely light compared to the conventional example.

Therefore, the gripping stand will not be deformed while moving by gripping the paperboard, and since it is light and has small inertia, the gripping stand can be started, moved, and stopped quickly.

Therefore, unlike the conventional example, this device is suitable for high-speed operation.

(2) Since the base end of the bite spring is fixed with a screw via a clamp, the stress generated at the base end is widely dispersed.

Therefore, unlike the conventional example, stress concentration does not occur, so fatigue and breakage do not occur, and the life of the bite spring can be extended.

(3) Since the tip of the free end is formed vertically and pressed against the spring base, when the paperboard is held between the tip of the bite spring and the spring part, the tip of the bite spring will touch the surface of the paperboard. Make contact while making sure to sink in.

Therefore, unlike conventional surface contact, the pressing force is stronger and the paperboard is firmly bitten, so there is no misalignment between the paperboard and the biting device during conveyance, so the paperboard can always be set in the correct position. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line - in FIG. 1... Bite rest, 3, 4... Hollow part, H... Length of the bite rest in the advancing direction, B... Distance between the front and back surfaces of the bite rest, 12... Bite spring, 15 ...Transportation chain.

Claims (1)

[Scope of utility model registration request] An automatic machine in which the base end of a bite spring is fixed to one end of a flat bite base, a spring base with a protruding hole is provided protruding from the other end of the bite base, and a conveyance chain is fixed to the bite base. In the punching machine, the fixed end of the gripping spring is fixed with a screw through a piece of cotton metal, and the gripping base is made of a lightweight material such as aluminum, which has a reinforced part and a hollow part along its longitudinal direction. The length of the bite base in the advancing direction is larger than the length between the front and back surfaces of the bite base, and the free end of the bite spring is formed in an arc shape to form an overhang hole. 1. A gripping device for an automatic punching machine, characterized in that the tip of the free end is formed vertically and pressed against a spring stand.