JPH0671103U - Cushion device for automatic feeder - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a cushion device for an automatic feeding device, which is capable of expanding the amount of cushion and is capable of handling special materials having different thicknesses, and prying the work material. This is to reduce damage to the main body when an abnormal load such as the above is applied. [Structure] In addition to the cushion of the feed roller 20 for each material feeding, a cushion spring is provided between the support arm 1 to which the feeder unit 5 is attached and the feeder unit 5 to form a double cushion structure. The displacement expansion type selects the spring constant so that the roller pressure and vertical displacement are continuous with the roller cushion displacement and change linearly.For the load compatible type, the roller pressure and vertical displacement are The spring constant is selected so that the displacement of the roller cushion rises rapidly.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic feeding device for a material to be cut in a woodworking machine, for example, a universal woodworking machine.

[0002]

[Prior art]

 In the conventional automatic feeder of this type, a cushioning device such as a spring is provided for each of the double-row feeding rollers, and the feeding is performed smoothly by mainly dealing with the uneven thickness due to the precision of the material. However, it is not possible to deal with relatively large thickness differences due to single-sided processing, or abnormal loads due to twisting during feeding in long materials.

[0003]

[Problems to be solved by the device]

 In order to provide the automatic feeder with versatility and to use it, the amount of cushion must be increased as much as possible. Generally, this cushion spring is used, but the way of dealing with it is different between when the displacement is enlarged and when the abnormal load is dealt with. Also, there is a limit to the amount of cushion that can be given to each feed roller. The object of the present invention is to eliminate the above-mentioned drawbacks of the conventional technology, to expand the cushion amount, to be able to deal with special materials having different thicknesses, and to handle abnormal loads such as prying of the material to be cut. If this is done, it is intended to reduce damage to the main body.

[0004]

[Means for Solving the Problems]

 The above-mentioned object is achieved by providing a support arm to which a feeding device is attached in addition to the cushion of each material feeding roller and a double cushion mechanism in which a cushion spring is provided between the feeding devices.

[0005]

[Action]

 The automatic feeder configured as described above acts as shown in FIG. 3 when the displacement in the thickness direction of the material is increased, and mainly as shown in FIG. 4 when an abnormal load is applied. .

[0006]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. In the figure, a support screw 1 is provided with a feed screw shaft 2 whose both ends are axially supported. A screw holder (not shown) is fixed to the holder 3, and the feed screw shaft 2 is screwed. A handle 4 is fixed to the end of the feed screw shaft 2 so that the rotation of the handle 4 causes the feeder device 5 suspended by the holder 3 to move in the horizontal direction. FIG. 1 of the present invention is a displacement magnifying type corresponding to FIG. A spring stopper 8 which is fitted into the column 6 and integrated with the column 6 by a stopper pin 7 is placed on the D surface of the holder 3, and a spring guide 10 is fixed to the center of the spring holder 9 with a nut 11 or the like. The spring 12 is attached to the spring guide 10, and the spring holder 9 is fixed to the holder 3 with the screw 13. As the characteristic of the spring 12, the spring constant is selected so as to extend between A and B in FIG. The spring has a relatively large coil diameter and a small wire diameter. When the vertical displacement of the spring 12 becomes a + b, the stopper pin 14 hits the bottom surface of the holder 3 and stops. Further, FIG. 2 is a load-corresponding type corresponding to FIG. A holder 15 is slidably fitted in the column 6. The guide shaft 16 is fixed to the holder 15, the spring 17 is attached to the guide shaft 16, the spring holder 18 is inserted and inserted into the column 6, and the spring 17 is compressed to a predetermined size, and the spring holder 18 is attached to the column 6 as a stopper pin. It is fixed by 19. When the feeding device unit 5 is pushed up by the impact on the feeding roller 20 or the like, the corresponding width of the spring 17 of FIG. 2 expands to the load c + d of FIG. After the impact is removed, when the feeder unit 5 tries to return to the original position, the stopper ring 22 fixed to the column 6 by the screw 21 hits the E surface of the column 6 and returns to the original position to stop. There is. In the case of the load-corresponding type shown in FIG. 2, the spring constant is selected so that the displacement is small and the load is large as shown in B-C of FIG. The spring has a relatively small coil diameter and a large wire diameter.

[0007]

[Effect of device]

 According to the present invention, the thickness variation of the material to be cut is conventionally up to the dimension a in FIG. 3, but the present invention can also be applied to a special material having a thickness variation up to a + b. Further, when some abnormal load such as prying of the material to be cut is applied, the corresponding width is expanded up to the load of c + d in Fig. 4 as compared with the conventional case, so the damage to the main body is avoided.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a displacement magnifying type cushion device of an automatic feeding device according to the present invention.

FIG. 2 is a partially enlarged view showing an example of a load-corresponding type of the cushion device.

FIG. 3 is an explanatory diagram showing a relationship between a displacement-applied roller pressing force and a vertical displacement of the cushion device.

FIG. 4 is an explanatory view showing a relationship between a load-corresponding roller pressure of the cushion device and a vertical displacement.

[Explanation of symbols]

5 is a feeder unit, 6 is a column, 7, 14 and 19 are stopper pins, 8 is a spring stopper, 9 is a spring holder, 10 is a spring guide, 11 is a nut, 12,
Reference numeral 17 is a spring, 13 is a screw, 15 is a holder, 16 is a guide shaft, 18 is a spring holder, 20 is a feed roller, 21 is a screw, and 22 is a stopper ring.

Front page continuation (72) Inventor Tokuyoshi Yokosuka 1060 Takeda, Katsuta City, Ibaraki Prefecture Hitachi Koki Engineering Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. An automatic feeding device having a feeding device for feeding a material supported on a table of a woodworking machine, wherein the feeding roller and the feeding device correspond to the material precision, shape, behavior and the like of a material to be cut. A cushion device for an automatic feeding device, each of which is provided with a cushion device.