JPH0412051Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a blank holding device for holding a blank in a box making machine and moving the blank to a predetermined position. Regardless of the thickness or hardness of the folded blank,
The present invention relates to a blank clamping device in a box making machine that can securely clamp the blank.

[Prior art and its problems] In general, a blank clamping device in a box making machine uses a gear mechanism to move a pair of clamping pieces protruding from the clamping body toward each other and separate them, to clamp the blank when they approach, and to separate them. Sometimes the blanks are released, and the means for approaching and separating the clamping pieces is to move a pair of clamping pieces to a predetermined width depending on the thickness of the blanks to be clamped, for example, the thickness of stacked blanks. There are some that are close together.

However, if a pair of clamping pieces are provided protruding from the clamping body, for example, when a pair of clamping bodies are used to clamp both sides of a blank, the blank folded by the box making machine will be placed in the stacked part. The clamping pieces get in the way when being fed. For this reason, if the distance between the pair of clamping pieces is widened, the stroke required to bring the two pieces close together becomes longer, which not only causes a decrease in work efficiency, but also requires a longer length of the clamping body. This leads to an increase in the size of the blank stacking section, and the length of the entire box making machine, which is not practical. In addition, if the pair of clamping pieces are set close to each other with a predetermined width using a gear mechanism, for example, if there is a difference in the laminated thickness of folded blanks, if the stacked blanks are thicker than the predetermined width, the blanks will be clamped with strong pressure and In some cases, the blank must be clamped with a slight pressure, which may damage the blank or prevent reliable clamping, which poses an operational problem in that the clamping width must be adjusted one by one.

[Specific means for solving the problem] The present invention solves the above problem and provides a blank clamping device for a box making machine that can securely clamp a blank regardless of its thickness or hardness. The drive rack is pivotally mounted on the clamp body, and has a driving rack movably provided on the clamp body by supplying and exhausting air to the cylinder, and a pair of pinions, one of which is engaged with the rack. a transmission shaft, another pair of clamping piece actuation racks engaged with each other across the other pinion of this transmission shaft, and a starter attached to the clamping body at each tip of the pair of clamping piece actuation racks. The present invention is characterized in that clamping pieces are provided along the tilting guide pieces and facing each other and pivoted so as to be able to freely rise and fall.

[Example] Hereinafter, an example in which a blank holding device in a box making machine according to the present invention is used as a blank reversing device will be described based on the attached drawings.

FIG. 1 and FIG. 2 are a side view and a perspective view of a part of the reversing mechanism section of the blank reversing device.

As part of this mechanical section is shown on the left side of FIG. supplied to the position.

When the supplied folding boxes 1 reach a predetermined number, their both sides are clamped by a pair of clamping bodies 5 provided on the reversing machine 6, and the reversing machine 6 rotates about its shaft 61, and these The folding box 1 is inverted and placed on the second rail 7.

After placing the folding box 1 on the second rail 7, the clamping body 5 releases the clamping of the folding box 1, and at the same time, the reversing machine 6 rotates in the opposite direction and returns to its original position.

The bars 62, 6 of the reversing machine 6 of such a reversing device
A pair of clamping bodies 5 provided on the holder 2 have the configuration shown in FIGS. 3 to 5.

Here, FIG. 3 is a cross-sectional view of the main part of the holding body 5, and FIG.
The figure shows an inner side view of the clamping body 5, and FIG. 5 shows an external side view of the clamping body 5.

A pair of vertical guide rails 8, 8 are fixed to the outer surface of the main body 51 of the clamping body 5, which is fixedly attached to the bar 61 of the reversing machine 6. An air cylinder 9 is mounted so that it can be raised and lowered by supplying and exhausting air from supply and exhaust ports 10 and 10. On the side of this air cylinder 9, there is a rack 11a inside the air cylinder 9.
The drive rack member 11 is attached so that the

A transmission shaft 14 is pivotally attached to the central portion of the holding body 51 so as to pass through a lifting guide piece 12 and a holding piece actuating rack member mounting piece 13, which will be described later.

As shown in FIGS. 3 and 5, the raising/lowering guide piece 12 is fixed to the inner surface of the holding body 51, and extends in an arcuate shape on the outer surface at right angles to the upper left side and lower right side in FIG. Raising/lowering guide portions 12a, 12b are formed which are bent.

The transmission shaft 14 on the inner side of the raising/lowering guide piece 12 has a
A pinion 15 is fixed, and this pinion 1
5, each rack 16 of the clamping piece actuation rack members 16 and 17 arranged on the left and right sides with the pinion 15 in between.
a, 17a are occluded.

The clamping piece actuating rack members 16 and 17 are connected to the lifting guide portions 12a and 1 of the lifting guide piece 12, respectively.
The clamping piece actuating rack member is attached to the tilting guide piece 12 by a clamping piece actuating rack member attachment piece 13 so as to be movable in the direction 2b, and clamping pieces 18 and 19 are provided at each tip thereof so as to be freely tiltable.

Each of the clamping pieces 18 and 19 has a rotor 21 rotatably provided on its plane by a shaft 20, and a mounting shaft 22 of the clamping pieces 18 and 19 to the clamping piece actuating rack members 16 and 17 and the shaft 20 A spring 23 is used that is stretched between the two.

This spring 23 always holds the clamping pieces 18, 19
The clamping members 18 and 19 are biased in the direction in which they fall down, that is, in the direction in which the clamping surfaces of the clamping pieces 18 and 19 are flush with the clamping piece operating rack members 16 and 17.

A pinion 2 is provided at the outer end of the transmission shaft 14 and is engaged with the rack 11a of the drive rack member 11.
4 is installed.

The operation of the blank holding device configured in this way will be explained below.

Now, as shown in FIGS. 2, 3, and 5, the clamping pieces 18 and 19 are in the folded state, that is, the clamping piece actuation rack members 16 and 17 are extended upward and downward. In this state, when air is supplied from one of the supply and exhaust ports 10 of the air cylinder 9 and exhausted from the other, and the air cylinder 9 descends downward in the figure, the rack 11a of the drive rack member 11 attached to the air cylinder 9 The pinion 24 is rotated, and the other pinion 15 is rotated via its transmission shaft 14. As the pinion 15 rotates, the clamping piece actuating rack members 16 and 17 are lowered and raised in parallel to the transmission shaft 14, respectively, via the racks 16a and 17a that are engaged with the pinion. At this time, the clamping pieces 18 and 19 provided at the ends of the clamping piece actuation rack members 16 and 17 move the tilting guide portions 12a and 12a of the tilting guide piece 12 around the respective mounting shafts 22, respectively.
The rotor 21 is moved along the axis 12b to stand up, and the folding box 1 interposed between the clamping pieces 18 and 19 is clamped under a predetermined pressure determined by the air cylinder 9.

Therefore, even if there is a difference in thickness on both sides of the folding box 1, as shown in FIG. 6, for example,
The only difference is the amount of movement of the clamping piece actuating rack members 16, 17, and the clamping pressure remains the same.

In order to release the folding box 1, air is supplied from the other side of the air supply/exhaust port 10 of the air cylinder 9, and air is exhausted from one side.
When the gripping piece actuating rack members 16 and 17 are raised upward in the figure, contrary to the above, each clamping piece actuating rack member 16, 17 extends, and the transmission shaft 1
Rise or descend in parallel in the direction away from 4.

When the tip of each clamping piece operating rack member 16, 17 moves to a position where it protrudes from the tilting guide piece 12, the rotor 21 of each clamping piece 18, 19 moves along the tilting guide piece 12 to the outer surface of the clamping body 51. Because each clamping piece 18, 19 moves sideways by the elasticity of the spring 23, each clamping piece operating rack member 16, 17
The folding box 1 is folded down so that it is on the same plane as the folding box 1, and the clamping of the folding box 1 is released.

Note that this embodiment is configured as described above,
Although the configuration used is shown, the configuration is not limited to this in any way, and for example, the following configuration may be adopted.

That is, the air cylinder is replaced with an oil cylinder.

Depending on the purpose of use, the number of holding bodies used is one or an appropriate number.

The cylinder is fixed to the clamp body and a rack is formed on the movable rod of the cylinder.

To raise and lower the clamping piece, a guide pin or a guide roller provided on the back surface of the clamping piece is movably inserted into the tilting groove of the guide piece having a tilting groove, and the clamping piece operating rack member is moved as in this embodiment. This is done by moving.

It is obvious that the design can be modified as appropriate without departing from the gist of the present invention.

[Effects of the invention] As described above, since the blank holding device in the box making machine of the present invention has the above-described configuration, it does not increase the length of the device, and even if there are differences in blank thickness, hardness, softness, etc. This has the effect that the blank can be reliably held at a predetermined pressure.

[Brief explanation of the drawing]

The drawings show an embodiment of the blank holding device in the box making machine according to the present invention, and FIG. 1 is a side view of a part of the reversing mechanism in the blank reversing device;
Figure 2 is a partial perspective view of Figure 1, Figure 3 is a sectional view of the main part of the clamping body, Figure 4 is an inner side view of the clamping body,
The figure is an outer side view of the clamping body, and FIG. 6 is an explanatory diagram of the state in which the blank is clamped. 1... Folding box (blank), 5... Holding body, 9
... Air cylinder, 11 ... Drive rack member, 11a ... Rack, 12 ... Lifting guide piece,
14... Transmission shaft, 15, 24... Pinion, 1
6, 17... Clipping piece actuation rack member, 16a, 1
7a... Rack, 18, 19... Clamping piece, 51...
...The main body of the clamping body.

Claims (1)

[Claims for Utility Model Registration] (1) A clamping body having a drive rack provided on the clamping body so as to be movable by supplying and exhausting air to a cylinder, and a pair of pinions with one pinion meshed with the rack. a transmission shaft pivotally connected to the main body;
Along the other pair of clamping piece operating racks that are engaged with the other pinion of this transmission shaft in between, and the lifting guide pieces attached to the clamping body body at each tip of these pair of clamping piece operating racks, What is claimed is: 1. A blank clamping device for a box making machine, characterized in that clamping pieces facing each other and pivotally mounted so as to be tiltable can be provided. (2) The cylinder is moved by its air supply and exhaust along the guide rail provided on the holding body body,
A blank clamping device for a box making machine according to claim 1, wherein a drive rack is attached to the cylinder. (3) The means for raising and lowering the pair of clamping pieces is a spring installed between the axis of a rotor provided on the back surface of each clamping piece and the mounting axis of the clamping piece for each clamping piece actuation rack. Alternatively, when an elastic material such as a leaf spring is constantly tensioned with its elasticity in the direction in which the clamping pieces fall down, and each clamping piece operating rack is moved toward the transmission shaft, each of the rotors has a side hook shape. A blank clamping device for a box making machine according to any one of claims 1 and 2, which comprises a means for raising a clamping piece along a raising/lowering guide piece.