JP2885585B2 - Stamping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stamping device used for indicating the date of manufacture, expiration date, contents, etc. of ink on tofu or other packed products or Kamaboko or other packaged products. About.

[0002]

2. Description of the Related Art Conventionally, a marking device as shown in FIG. 6 is used to display the date of manufacture on the surface of a packed product or a packaged product. This marking device is provided with a print head section 41 above a product transport conveyor 40 of the apparatus main body.
When the height position adjusting handle 42 is turned, the print head portion 41 is moved up and down while being guided by the stand rod 43 so that the print head portion 41 can be fixed at an appropriate position according to the height of the product W. It has become. When the product W is sent directly below the print head unit 41 by the conveyor 40, the date of manufacture is stamped on the marking surface of the product W by the characters provided on the lower surface of the print head unit 41. .

[0003]

In the above-described conventional marking device, the print head unit 41 is fixed at a predetermined height position, and therefore cannot correspond to the height of the marking surface of each product W. A high object is crushed when passing immediately below the print head unit 41, and the seal unit is damaged, causing a problem that the contents leak out. Also, if the marking surface is low,
A problem arises in that the hit of the type becomes poor and the stamped character is missing.

The present invention has been proposed in order to solve such problems of the conventional technology, and even if the height of the marking surface of each product varies, it can be easily lifted and lowered. It is another object of the present invention to provide a marking device in which the printed print head is moved up and down in response to the printing, and a clear marking can be performed with a substantially constant printing pressure.

[0005]

In order to achieve this object, a stamping device according to the present invention comprises a conveying means on which a product is placed and which conveys the product to a stamping position, and which is provided adjacent to the stamping position. A print head unit that is intermittently driven for rotation each time the product is transported, and that is provided on a lower surface portion of the print head unit for performing a predetermined marking on a marking surface of the product with the type attached to the type holder. While being driven to rotate, a holding belt for moving the product in the discharge direction in cooperation with the above-mentioned transporting means while pressing the upper surface of the product,
A vertically moving block connected to the print head,
The vertical movement block is supported so as to be able to move up and down, and the height position of the vertical movement block is adjusted to set the lower limit height of the print head portion with respect to the upper surface of the transporting means. Resilient support means for striking from below to substantially offset its own weight and for applying a vertical load corresponding to a desired printing pressure to the type mounted on the print head portion, and a lower surface portion of the print head portion And a product receiving plate that abuts on the product immediately before the marking position and pushes up the print head when a product higher than the set lower limit height is conveyed.

[0006]

According to the above-described structure, even if there is some variation in the height of each product conveyed by the conveyance means, the print head portion which is easily supported up and down is located just before the marking position. After the product is once pushed up by the contact of the product with the receiving plate, the product is lowered to the marking surface of the product by a vertical load corresponding to the printing pressure, and the product is marked while being held by the holding belt.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a stamping apparatus according to the present invention. FIG. 1 shows a front view of the marking device, and FIG. 2 shows a side view. In these figures, 1 is a control box and 2 is a preheater. The conveyor 3 provided as a means for transporting the product W is continuously driven in the direction of arrow P by the drive of the motor 4, and the product W to be stamped placed on the conveyor belt for transport is guided by the left and right guides. While being guided by the plate 5, the paper is sequentially conveyed to a position immediately below the print head unit 6 which is arranged adjacent to the stamping position, and the printing date and the like are determined by the type 7 attached to the print head unit 6.
Stamped on.

The type 7 is mounted on a type holder 8 provided on the print head 6 as shown in FIG. 3, and this type holder 8 is connected via a one-way clutch mechanism 36 as shown in FIG. Connected to the motor 17. The continuous rotational movement of the motor 17 is converted into an intermittent rotational movement by a one-way clutch mechanism 36 and transmitted to the type holder 8, and the type holder 8 conveys the product W to the marking position in synchronization with the rotation of the motor 17. It is intermittently driven by one rotation every time. The one-way clutch mechanism 36 is controlled by, for example, disposing a sensor (not shown) immediately before the marking position adjacent to the passage of the conveyor 3 and detecting the product W passing through the sensor. Can be done by signal. Further, an ink roll 9 is provided adjacent to the type holder 8, and the ink is supplied from the ink roll 9 every time the type holder 8 is driven intermittently as described above.

Since the type holder 8 is located above the holding belt 10 of the type 7 for holding the product W at the time of stamping, a special tall type 7 is attached to the type holder 8. As shown in FIG. 4, the leading end of the character 7 protrudes from the holding belt 10. Type adjustment knob 1
Numeral 1 is for adjusting the appearance of the character 7 from the notch 12a of the product receiving plate 12, and the knob 11 can optimally set the contact of the character 7 on the marking surface W1. The two holding belts 10 are stretched left and right so as to hold the product receiving plate 12 between the driving pulley 13 and the driven pulley 14 so as to hold both sides of the upper surface of the product W. 16, the tension of the belt 10 can be adjusted. As shown in FIG. 5, the rotational force from the motor 17 is transmitted to the drive pulley 13 via a belt 18 so that the holding belt 10 can be continuously rotated in the product transport direction in synchronization with the transport conveyor 3. .

The vertically moving block 19 is guided by three stand rods 21 via upper and lower guide bearings 20 so as to be movable up and down in the vertical direction. Product receiving plate 1
One end of 2 is fixed by a screw 22. The product receiving plate 12 is horizontally protruded toward the lower surface of the print head unit 6, and the other end of the product receiving plate 12 is integrally connected to the print head unit 6. Is formed with a push-up operation piece 12b that is inclined upward at the tip end protruding in front of the marking position. Further, a screw bar 23 that vertically penetrates the center of the vertical movement block 19 is mounted on the vertical movement block 19, and the screw rod 23 is rotatable between an upper support plate 24 and a lower support base 25. And a height position adjusting handle 26 is attached to the upper end thereof. This screw rod 2
3, a nut 28 is screwed into a position below a casing 27 that covers the vertical movement block 19, and a nut stopper 29 is fixed to an upper flange portion of the nut 28 by a screw 30. The collar 31 fitted over the nut 28 is in contact with the lower surface of the vertically moving block 19 via the seat plate 32.

When the nut 28 is screwed upward by turning the height adjustment handle 26, the nut 2
The vertical movement block 19 is pushed upward by 8 so that the height of the print head unit 6 can be increased. Also, when the adjustment handle 26 is reversed, the nut 28 retreats downward.
Is lowered by its own weight, and the height of the print head unit 6 can be set low. Thus, the stand rod 21, the screw rod 23,
With the nut 28, the detent 29 and the adjustment handle 26,
A height adjustment mechanism for adjusting the height of the print head unit 6 to be supported at a predetermined position via the vertical movement block 19 is configured.

An upper spring pressure adjusting nut 34 screwed to the vertical moving block 19 and a free lower seat plate 32 are provided in a shaft hole 33 of the vertical moving block 19 through which the screw rod 23 is inserted. Between the cushion spring 3
5 is fitted. This cushion spring 35
The vertical movement block 19 is pushed up from below with a resilience slightly smaller than its own weight including the print head unit 6 and the vertical movement block 19 supporting the print head unit 6 to almost cancel the vertical load from above. 6 so that a slight vertical load is applied to the spring pressure adjusting nut 34.
Adjusts the spring pressure. These cushion springs 35, adjusting nuts 34, and the like constitute resilient support means, and the resilient support means floats the print head unit 6 in a state where the print head unit 6 is easily slid up and down in the vertical direction. When a push-up force acts, the product moves up and down freely so as to be able to cope with variations in the height of the marking surface W1 of each product W.

In the stamping device having the above-described configuration, the height adjustment mechanism is set in accordance with the lower limit of the height of the product W in advance when the height of the product W is assumed to vary when used, and the desired printing for the type 7 is performed. The resilient support means is set so that the printing pressure of? That is, the vertical movement block 19 is raised and lowered by turning the adjustment handle 26, and the lower surface portion of the print head unit 6 (the height from the product receiving plate 12) to the lower limit of the height of the product W is adjusted. . For example, the height from the conveyor surface 3a to the product receiving plate 12 is determined by the product W
Is set lower than the standard height of, for example, about 5 mm. Further, the spring pressure adjusting nut 34 is rotated to compress the cushion spring 35, and the vertical pressure block 19 is pushed up by the spring pressure (elastic force) so that the desired type 7 is attached to the print head unit 6. Is adjusted so that a vertical load corresponding to the printing pressure of is applied.

The product W successively conveyed to the stamping position side by the conveyor 3 is the push-up operation piece 12 of the product receiving plate 12 which stands by immediately before the stamping position.
b, and advances to the marking position while pushing up the print head unit 6 through the product receiving plate 12. In the marking position, the product W is held by the printing belt 7 running at the same speed as the conveyor 3, and the printing surface W is printed by the printing type 7 of the printing type holder 8 that is intermittently driven to rotate.
1, the date of manufacture is stamped. In this way, even if there is some variation in the height of the individual products W, the entire print head portion 6 that is easily lifted and lowered is correspondingly moved up and down, and Since a vertical load corresponding to a desired printing pressure is applied to the type 7 of the print No. 6, a predetermined marking is surely performed on each product W while the degree of contact of the type 7 with the marking surface W 1 is always constant. be able to. In this stamping device, the product W is the push-up operation piece 1
When the print head unit 6 is pushed up via the product receiving plate 12 by contact with the product W, a resistance force acts on the product W in the transport direction. However, since the product W is sandwiched by the holding belt 10, the product W Can be prevented from slipping.

The present invention is not limited to the above-described embodiment, but may take various modifications within the scope of the invention. For example, instead of the resilient support means by the cushion spring 35 in the embodiment, for example, a hydraulic cylinder using hydraulic pressure or pneumatic pressure can be used. In addition, as a means for conveying the product W, the conveyor 3 in the embodiment is used.
In place of this, for example, a roller conveyor is used, and the product W placed with the roller conveyor inclined is transported to the marking position side by itself, or the product W loaded with the roller conveyor placed horizontally is Can be conveyed to the marking position while pressing.

[0016]

As described above, according to the present invention, even if the heights of individual pack products or packaging products to be stamped vary, the print head is moved up and down in response to this, and The degree of contact of the attached type with the marking surface can be kept constant. Therefore, unlike the conventional case, there is no problem such as crushing of the product, leakage of the contents, and lack of printing, and clear marking can be reliably performed on the marking surface.

[Brief description of the drawings]

FIG. 1 is a front view of a stamping device according to the present invention.

FIG. 2 is a side view of the marking device.

FIG. 3 is a front view showing a print head unit of the marking device.

FIG. 4 is a vertical sectional view showing a mechanism for moving a print head unit up and down.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a side view of a conventional marking device.

[Explanation of symbols]

 3 Conveyor for Conveyance 6 Print Head 7 Print Type 8 Print Holder 9 Ink Roll 10 Holding Belt 11 Print Adjustment Knob 12 Product Receiving Plate 13 Drive Roll 14 Follower Roll 15, 16 Tension Roll 17 Motor 19 Vertical Movement Block 20 Guide Bearing 21 Stand Shaft 23 Screw rod 26 Height adjustment handle 28 Nut 29 Locking 31 Collar 32 Seat plate 33 Shaft hole 34 Spring pressure adjustment nut 35 Cushion spring

Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) B41F 17/24 B41F 17/14 B41K 3/02-3/24 B65B 61/26

Claims (1)

(57) [Claims] 1. A conveying means on which a product is placed and which conveys the product to a marking position, a type holder which is provided adjacent to the marking position and which is intermittently driven every time a product is conveyed, A print head unit for performing a predetermined marking on the marking surface of the product with the type attached to the printer, and provided on the lower surface portion of the print head unit and driven to rotate,
A holding belt for moving the product in the discharge direction in cooperation with the transport means while holding the upper surface of the product, a vertically moving block connected to the print head portion, and supporting the vertically movable block to be able to move up and down. Together with a height adjustment mechanism that adjusts the height position of the vertical movement block to set the lower limit height of the print head portion with respect to the upper surface of the transporting means;
Elastic support means for supporting the vertical movement block from below to substantially cancel its own weight and applying a vertical load corresponding to a desired printing pressure to the type mounted on the print head portion; and A product receiving plate which is provided on the lower surface of the head portion and which comes into contact with the product immediately before the marking position when the product having a height higher than the set lower limit is conveyed, and which pushes up the print head portion. Characteristic marking device.