JPH06134703A - Method and apparatus for connecting veneer - Google Patents

Abstract

PURPOSE:To shorten a connecting time at a connecting part by heating, if an adhering member is thermosetting, at least one side of front and rear ends of a veneer to be connected from when the veneer is inserted until it is connected, or cooling, if the member is thermoplastic, it. CONSTITUTION:When a veneer A is conveyed in a fiber direction by operations of carrying rolls 1, 3 in a state that a veneer B is previously stood by at a connecting position and a front end of the veneer A reaches a sensor 5, a front end detection signal is sent from the sensor 5 to a controller. Further, when the veneer A is conveyed and the front end of the veneer A reaches vicinities of veneer heaters 7, 9, the controller energizes an infrared ray rod heaters of the heaters 7, 9 based on the signal to heat the front end of the veneer A. Moreover, when the veneer A is conveyed and the front end of the veneer A passes the heaters 7, 9, the controller deenergizes the heaters to interrupt heating. Thus, a connecting time can be shortly set.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a veneer veneer joining method and joining apparatus.

[0002]

2. Description of the Related Art Heretofore, the temperature of a veneer veneer (hereinafter simply referred to as a veneer) to be joined by a joining device has been a normal temperature.

[0003]

When the veneers cut into effective dimensions in order are joined by an adhesive member, if the adhesive member is a thermosetting adhesive member, the part to be joined of the veneer and the thermosetting adhesive are joined. The temperature of the components must be raised to the temperature at which they will be joined securely. If the adhesive member is a thermoplastic adhesive member, the temperature of the portion where the single plate is joined and the temperature of the thermoplastic adhesive member must be lowered to the temperature at which they are reliably joined. However, when the temperature of the veneer is a normal temperature, it takes a long time to raise or lower the temperature of the bonding part of the veneer and the temperature of the adhesive member to the temperature at which the veneer is reliably bonded.
Therefore, the joining time at the joint must be set longer, resulting in less production. The adhesive member includes an adhesive itself, a mixture of the adhesive and a filler, and a mixture of the adhesive and a reinforcing material.

[0004]

Therefore, the present invention has been developed to eliminate the above-mentioned defects of the conventional apparatus. Specifically, the veneer to be inserted is sequentially cut into effective dimensions and cut. In the method of sequentially joining the end portions with the adhesive member, at least one of the front end portion and the rear end portion of the single plate to be joined is inserted between the inserting and joining of the single plates if the adhesive member is thermosetting. A method of joining single plates (claim 1), characterized by heating and cooling the adhesive member if it is thermoplastic;
In a joining device having a cutting part for sequentially cutting the inserted veneer into effective dimensions and a joining part for sequentially joining the ends of the cut veneers with an adhesive member, if the adhesive member is thermosetting, If the plate heating body, or the adhesive member is thermoplastic, a single plate cooling body,
A single-plate joining device (claim 2) characterized in that it is provided up to the joining portion.

[0005]

Operation: From the insertion of the veneer to the joining, at least one of the front end part and the rear end part of the veneer to be joined is heated if the adhesive member is thermosetting, and the adhesive member is If it is thermoplastic, the applied adhesive member is heated or cooled directly from the veneer by cooling the joining portion. As a result, the joining time at the joining portion is shortened.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to an example illustrated in the drawings. For the sake of convenience of description, a transporting unit, a detecting unit,
With regard to the cutting portion, the joint portion, the unloading portion, and the like, only typical examples are given, and many other different types of mechanisms having similar mechanisms are known, and they can be replaced or substituted. It should be added in advance that there is no particular restriction on the related operation of each of these mechanisms, and the operation is in accordance with the ordinary method.

The present invention will be described with reference to FIG. 1 in which an adhesive member is thermosetting. In the frame (not shown) of the joining device, a pair of upper and lower carry-in rolls 1, 3, intermediate rolls 23 and 25, a carry-out roll 51 for carrying the single plate,
53 has an axis in a direction orthogonal to the transport direction of the veneer,
An electric motor (not shown) is provided with a clutch mechanism (not shown) on each of the carry-in roll 3, the intermediate roll 25, and the carry-out roll 53, which are rotatably supported so that their peripheral surfaces are in contact with each other and are located below. ), And the veneer is appropriately intermittently conveyed by the connecting / disconnecting operation of the clutch mechanism. 5, 2
Reference numeral 7 denotes a plurality of detectors arranged in a direction orthogonal to the conveyance of the conveyed single plate, and is attached to the frame via an appropriate attachment (not shown).

Single plate heating elements 7, 9, 19, 21, 29, 3
Numeral 1 is an infrared rod heater having a length equal to or larger than the width of the veneer in the direction of conveying the veneer and generating heat of at least about 180 degrees Celsius by electricity. It is attached to the frame via.

At the cutting position, a blade receiving base 13 having a length equal to or larger than the width of the single plate is fixed to the frame in the direction orthogonal to the single plate conveying, and a recess 17 is provided above the blade receiving base 13 in the direction orthogonal to the single plate conveying. Is formed to have a length equal to or more than the width of a single plate, and an elastic member 15 such as hard urethane rubber is provided in the recess 17 and a cutting blade 1 described later.
It is attached to support the entire cutting edge of 1. A cutting blade 11 is supported on the carry-in side of the blade receiving base 13 so that the blade edge moves at a required angle with respect to the blade receiving base 13.

At the coating position, a glue roll 43 and an adjusting roll 41 each having a length equal to or larger than the width of the veneer in the direction orthogonal to the veneer conveyance, and a gap between the glue roll 43 and the adjusting roll 41 can be arbitrarily adjusted so as to be supported later. It is rotatably supported by the metal 35, and an electric motor (not shown) is further connected to the glue roll 43,
The adjusting roll 41 follows the glue roll 43 as it rotates in the direction of the arrow. The support metal 35 is rotatably attached to the frame via a shaft 37, and the rod portion of the air cylinder 33 is rotatably attached to the support metal 35 and the attachment portion (anti-rod portion) of the air cylinder 33 is rotatably attached to the frame. Is attached to. The urea resin adhesive 39, which is an adhesive member, is held by the glue roll 43, the adjusting roll 41, and the support metal 35, and when the urea resin adhesive 39 decreases, a detector (not shown) and an adhesive It is supplied by a member supply device (not shown).

At the joining position, a pair of upper and lower heating members 47 and 49 each having a length equal to or more than the width of the single plate are arranged in the direction orthogonal to the single plate conveyance. The heating members 47 and 49 include a heating member such as a heater (not shown). ) Is built in and is heated to the curing temperature of the urea resin adhesive 39. The heating member 47 located above is supported by an air cylinder 45 so as to be vertically movable.

Based on the signals from the detectors 5 and 27, the carry-in rolls 1 and 3, the intermediate rolls 23 and 25, the carry-out roll 51,
53, single plate heating body 7, 9, 19, 21, 29, 31, cutting blade 11 controller 55 for controlling air cylinders 33, 45
(See FIG. 2) and the like.

Next, the operation of the joining device constructed as described above will be described with reference to FIG. The veneer B whose rear end portion was cut by the cutting blade 11 was preliminarily waited at the joining position in FIG. 1, and the veneer A was conveyed in the fiber direction by the operation of the carry-in rolls 1 and 3, When the front end of A reaches the detector 5,
The front end detection signal 5a (see FIG. 2) from the detector 5 is sent to the controller 5
Sent to 5. When the veneer A is further conveyed and the front end of the veneer A reaches the vicinity of the veneer heating bodies 7 and 9, the controller 55 is the veneer heating bodies 7 and 9 based on the front end detection signal 5a. Electricity is applied to the infrared rod heater to heat the front end portion of the single plate A. When the veneer A is further conveyed and the front end of the veneer A passes through the veneer heating bodies 7 and 9, the controller 55 shuts off the electricity of the infrared rod heater and interrupts the heating.

When the veneer A is further conveyed and the front end of the veneer A reaches the cutting position, the controller 55 brakes the carry-in rolls 1 and 3 based on the front end detection signal 5a, and the cutting blade 1 is cut.
1 is operated to cut the uneven portion of the front end portion of the veneer A. At this time, air is blown from above to blow off the cutting waste. When the cutting blade 11 finishes cutting the veneer A and returns to the initial position, the carry-in rolls 1 and 3 are operated again to convey the veneer A. When the veneer A is further conveyed and the front end portion of the veneer A reaches the vicinity of the veneer heating bodies 19 and 21, the controller 55 controls the front end detection signal 5a based on the front end detection signal 5a.
Electricity is applied to the infrared rod heaters that are the single plate heating bodies 19 and 21 to heat the front end portion of the single plate A. Further, the veneer A is conveyed, and the front end portion of the veneer A is transferred to the veneer heating body 1.
After passing 9 and 21, the controller 55 cuts off the electricity of the infrared rod heater and interrupts the heating. Further, the veneer A is conveyed, the veneer A is carried into the intermediate rolls 23 and 25, and the veneer A is conveyed by the intermediate rolls 23 and 25. When the veneer A is further conveyed and the rear end of the veneer A reaches the detector 5, the detector 5 sends a rear end detection signal 5b (see FIG. 2) to the controller 55. When the veneer A is further conveyed and the rear end of the veneer A reaches the vicinity of the veneer heating bodies 7 and 9, the controller 55 controls the veneer heating bodies 7 and 9 based on the rear end detection signal 5b. Then, electricity is applied to the infrared rod heater to heat the rear end of the single plate A. When the veneer A is further conveyed and the rear end portion of the veneer A passes through the veneer heating bodies 7 and 9, the controller 55 shuts off the electricity of the infrared rod heater and interrupts the heating.

When the veneer A is further conveyed and the rear end of the veneer A reaches the cutting position, the controller 55 brakes the intermediate rolls 23 and 25 based on the rear end detection signal 5b to cut. The blade 11 is operated to cut the uneven portion of the rear end of the veneer A. If the length of the veneer is almost constant,
The distance between the cutting position and the heating elements 29, 31 is made equal to the length of the veneer, and electricity is applied during the cutting operation of the rear end portion,
The front end of the veneer A can be heated. Then, when the cutting blade 11 finishes cutting the veneer A and returns to the initial position,
The intermediate rolls 23 and 25 are operated again to convey the veneer A, and the electricity of the infrared rod heater is cut off to interrupt the heating. When the veneer A is further conveyed and the front end portion of the veneer A reaches the detector 27, the front end detection signal 2 from the detector 27 is detected.
7a (see FIG. 2) is sent to the controller 55.

When the veneer A is further conveyed and the front end portion of the veneer A reaches the coating position, the controller 55 brakes the intermediate rolls 23 and 25 based on the front end detection signal 27a, and the supporting metal 35. The air cylinder 3 to rotate in the direction of arrow X.
3, the urea resin adhesive 39 attached to the outer periphery of the glue roll 43 is applied to the front end portion of the single plate A. When the length of the veneer is almost constant, the distance between the coating position and the veneer heating bodies 19 and 21 is made the same as the length of the veneer, and electricity is turned on during the coating operation. Thus, the rear end of the veneer A can be heated. Then, when the application of the adhesive member is completed, the intermediate rolls 23 and 25 are operated to convey the single plate A, and the electricity of the infrared rod heater is cut off to interrupt the heating.

When the veneer A is further conveyed and the front end of the veneer A reaches the position of the rear end of the veneer B, which is the joining position, the controller 55 causes the intermediate position based on the front end detection signal 27a. The rolls 23 and 25 are braked, the air cylinder 45 is operated to lower the heating member 47, and the front end of the veneer A coated with the adhesive member and the rear end of the preceding veneer B are heated by the heating member 4.
7, 49 are heated and pressed to join. After the joining is completed, the air cylinder 45 is operated so as to raise the heating member 47, and the intermediate rolls 23 and 25 and the carry-out rolls 51 and 53 are operated to convey the single plate. When the veneer is further conveyed and the rear end of the veneer A reaches the vicinity of the veneer heating bodies 29, 31, the controller 55 controls the veneer heating bodies 29, 31 based on the front end detection signal 27a. Electricity is applied to an infrared rod heater at a certain place to heat the rear end portion of the single plate A. When the veneer is further conveyed and the rear end portion of the veneer A passes through the veneer heating bodies 29, 31, the controller 55 shuts off the electricity of the infrared rod heater and interrupts the heating. When the veneer A is further conveyed and the rear end of the veneer A reaches the detector 27, the detector 27 sends a rear end detection signal 27b (see FIG. 2) to the controller 55.

When the veneer is further conveyed and the rear end portion of the veneer A reaches the joining position, the controller 55 brakes the carry-out rolls 51 and 53 based on the rear end detection signal 27b, and the veneer A is transferred.
Is stopped and waited at the position of the single plate B in the figure, and the air cylinder 33 is operated so that the support metal 35 rotates in the arrow Y direction. By repeating the above operation, the rear end of the preceding veneer and the front end of the next veneer are joined together. According to the present embodiment, the joining time of the heating members 47, 49 is shortened according to the total heating time of the single plate heating bodies 7, 9, 19, 21, 29, 31. As an example of the total heating time, it is about half the bonding time required without heating, and if the veneer thickness is 3 mm, the heating time is about 4 seconds.

A detector may be provided at the front of each single plate heating element, and each single plate heating element may be operated based on the detection signal of each detector. Further, the encoder is connected to the shaft of the carry-in roll by a gear or a belt (not shown),
If the pulse signal and the detection signal of the detector 6 are combined to activate each veneer heating body when the front end or the rear end of the veneer reaches the vicinity of each veneer heating body, The end of can be heated accurately.

Further, when the length of the veneer is substantially constant, the interval between the joining position and the veneer heating bodies 19, 21 is made equal to the length of the veneer, and the rear end portion of the preceding veneer is set. During the bonding operation with the front end of the next veneer, electricity can be applied to heat the rear end of the next veneer. Further, the single plate heating bodies of the examples are provided in a pair of upper and lower sides, but the number and arrangement can be appropriately selected. Then, instead of the infrared rod heater, which is a single plate heating body, a substantially rectangular air outlet having a length equal to or greater than the width of the single plate is provided in a direction orthogonal to the single plate conveyance, and hot air is blown from the air outlet of the single plate. The edges may be sprayed, or the heating member described in the above embodiment may be arranged as a hot plate to hot press the edges of the single plate.

When the veneer heating body is used as a hot plate and the veneer is hot-pressed, the veiling of the veneer decreases, so when the end of the veneer is cut at the cutting portion, a straight line is formed in the veneer width direction. A good cut surface can be made.

Next, the single plate heating body, hot air, and
In this example, the hot plate and the heating member are a single plate cooling body, cold air, the cold plate and the cooling member, and the adhesive member is thermoplastic.

[0023]

EFFECTS OF THE INVENTION From the insertion of the veneer to the joining, at least the part to be joined of the veneer is heated if the adhesive member is thermosetting, and if the adhesive member is thermoplastic, the above-mentioned joining is performed. Since the part to be joined is cooled, the joining time for joining is shortened, and as a result, the joining time in the joining device can be set short, the production amount can be increased, and the product cost can be substantially reduced. Of.

[Brief description of drawings]

FIG. 1 is a side view of an end face of an embodiment.

FIG. 2 is an electrical block diagram.

[Explanation of symbols]

 1 ... Carry-in roll 3 ... Carry-in roll 5 ... Detector 7 ... Single plate heating body 9 ... Single plate heating body 11 ... Cutting blade 13 ... Blade support 15 ... Elastic member 17 ... Recess 19・ ・ Single plate heating element 21 ・ ・ Single plate heating element 23 ・ ・ Intermediate roll 25 ・ ・ Intermediate roll 27 ・ ・ Detector 29 ・ ・ Single plate heating element 31 ・ ・ Single plate heating element 33 ・ ・ Air cylinder 35 ・ ・Supporting metal 37 ・ ・ Shaft 39 ・ ・ Urea resin adhesive 41 ・ ・ Adjusting roll 43 ・ ・ Adhesive roll 45 ・ ・ Air cylinder 47 ・ ・ Heating member 49 ・ ・ Heating member 51 ・ ・ Delivery roll 53 ・ ・ Delivery roll 55 ・・ Controller

Claims (2)

[Claims] 1. A method of sequentially cutting veneer veneers to be inserted into effective dimensions and sequentially joining the cut end portions with an adhesive member, wherein the veneer veneer is inserted and then joined. A method for joining veneer veneers, wherein at least one of the front end portion and the rear end portion of the veneer veneer is heated if the adhesive member is thermosetting and cooled if the adhesive member is thermoplastic. 2. A bonding apparatus comprising a cutting part for sequentially cutting a veneer veneer to be inserted into effective dimensions and a bonding part for sequentially joining the ends of the cut veneer veneer with an adhesive member. A veneer veneer joining apparatus comprising: a veneer veneer heating body if the member is thermosetting; and a veneer veneer cooling body if the adhesive member is thermoplastic, up to the joining part.